Connection from IP address 34.204.191.145
Time: 2020 Jul 12 10:48:42
Found 2469 logbook entries, displaying most recent 100

Logbook Contents (Most Recent Entries)

09 Jul 2020 Thursday 10:25 [carter] DRD values at quarterly check reset. Console=1.78 Roaming=.04

09 Jul 2020 Thursday 10:24 [CARTER] Quarterly safety checks done, carter/voinov

09 Jul 2020 Thursday 07:26 [Ingram] If you take a flashlight out of the box just inside the door of the control room please put it back there when you return to the control room. Just like any other general purpose tool, we need to share flashlights. Like any tool, they have a place they are stored when not in use which is where we look first. Please be considerate of others and put tools back in the place where they are stored so others may find them efficiently. David Ingram

07 Jul 2020 Tuesday 10:09 [Devon] Sputter source: Abruptly shutdown last night in conjunction with both water level and water flow alarms. Came in this morning to find a cooling line had come off the source and the loop had pumped itself dry, water all over the floor. Exactly as predicted in the emergency procedure book, protective systems functioned as expected. Cooling loop is refilled and source is back on. We are out of distilled water and very low on distilled/deionized water in the TFL, need a campaign of water processing...

05 Jul 2020 Sunday 14:35 [Tom Massey] The neutron sources have been returned to the source room.

30 Jun 2020 Tuesday 15:07 [Tom Massey] The alphatross has been giving 800 to 900 nA at the low enrgy cup. There are fluctuations in the beam. These fluctuations are showing up as a change in the X-Profile also on the R65 beam leg.

30 Jun 2020 Tuesday 09:16 [Devon] 2X and 2Y are off. Since the tics appear in the source cup it could be Probe, Extractor, Focus, or Bias, or source steerers.

30 Jun 2020 Tuesday 08:40 [Carter] From logging looks like some ticks are coincident with ticks in probe current. Another note, yesterday Kristyn suspected Y movement of beam ar source. We turned off the 2Y and 2X steerer power suppliessince they weren’t needed. Are they still off?

30 Jun 2020 Tuesday 08:18 [Devon] Alphatross: We left the source running overnight. The beam has increased but developed a periodic tic. Bouncing between 800 and 900 nA. The tic is also present in the source faraday cup which is measuring 4.5 uA negative beam. ??

29 Jun 2020 Monday 14:53 [Tom Massey] All Pu(Be) and Cf-252 sources have been put in the tunnel for Kristyn's experiment.

26 Jun 2020 Friday 11:52 [Devon] Alphatross: New plasma components installed. The fiber optic module on the source deck is plugged into regular building AC power in order to flow Helium thru the system for the weekend as a clean up. The source is not usable in this configuration. I'm not sure about the viability of the rubidium charge. Even though Ar was freely flowing out of the source during the first repair attempt, the Rb could be seen bubbling around the aperture to the Rb chamber. Then there was a small leak of air during pump down. The high vacuum pump down was slow and never quite reached what we had seen as baseline (high 10**-8) while we waited for parts. Today the Rb chamber entrance was white and mostly occluded. Poked it with an allen wrench to open up the hole, little fire balls flew, really reactive stuff. We won't know until we get it up to operating temperatures next week.

25 Jun 2020 Thursday 13:42 [Tom Massey] Seth Waldron from Life checked all of the fire exinguishers in the building. All CO2 were within 5 years of hydro testing and all Chemical were within 6 years of hydro testing.

23 Jun 2020 Tuesday 13:04 [Devon] Alphatross: The source developed a condition yesterday where the Probe current would run away (>8 mA) in the presence of just the plasma, no probe voltage. 350 hours of operation. A visual inspection showed that the quartz plasma bottle was coated with a milky white substance and the boron nitride insulator was plated with dark material. The assumption was that the plating was allowing too much current to reach the grounded Ta canal behind the insulator. The plan today was to replace the bottle, insulator, and canal while openly flowing Ar to protect the Rubidium. While removing the used bottle, the aluminum aperture behind the Ta canal also came out. The hole in this aperture had been plated on one side and sputtered away on the other side resulting in a severely off-axis aperture. We were not given any spare apertures with the source order. We were given 2 plasma bottles and 2 sets of insulator/canals. I was about to use 1 new bottle and the last insulator/canal but could not proceed with this aperture. I called NEC. They said the aperture is considered a wear item, they have 500+ in stock. They had no comment on the fact that it wore so bad after several hundred hours. We had a $1300 credit with them, so I ordered 6 apertures, 2 sets of insulator/canals, and another glass bottle. They should ship today. The source is back under vacuum while we wait for parts to complete the repair.

23 Jun 2020 Tuesday 10:42 [carter] The previous fix for DRDaccum didn't work. I have now moved the DRDaccum file to /var/www/html/DRDaccum with ownership of apache.apache. This seems to be working OK now. I also made a symbolic link to /var/www/html/DRDaccum in /home/carter for easy access.

18 Jun 2020 Thursday 15:18 [Tom Massey] All of the neutron sources have been put in the tunnel to reduce the neutron background for the current experiment. They will be returned to the Source Room following the experiment.

14 Jun 2020 Sunday 16:15 [carter] Left lab at 2:30 but posted message at 4:00

11 Jun 2020 Thursday 10:16 [carter] Attempted to correct permissions issue with /home/carter on control1. It seems that in order to allow passwordless logins from alphatross.oual.ohiou.edu to copy the alphatross data to control1, the directory /home/carter/ on control1 must have permissions 700. Conflicting, to allow apache httpd to write the DRDaccum file from the accelerator header webpage, the /home/carter/ directory permissions need to be 777. To allow the logging, I have modified /home/carter/ permissions to 700 and moved the DRDaccum file to /var/www/cgi-bin/ and modified the file /var/www/cgi-bin/tandem_log to reflect this location change. I have copied the old DRDaccum file to /var/www/cgi-bin/DRDaccum and also to a backup DRDaccum_11Jun2020. I have also created a symbolic link in /home/carter/DRDaccum the points to the new file location.

10 Jun 2020 Wednesday 14:03 [Devon] I made a collection of videos of alphatross operation. I hope to combine them into 1 video, but either way, I'm ready to try a teams training session next week. The source had all the signs of contamination after the long rest and numerous power outages. It only gave 300 nA of 4He, had sizable Oxygen peaks, and the settings were not what we had began to consider normal. It will need run for a few days to clean up.

10 Jun 2020 Wednesday 09:43 [Donald Carter] Hallways being waxed today so access to the lab may be limited.

08 Jun 2020 Monday 16:04 [carter] Left lab at 2:30 but posted message at 4:00

08 Jun 2020 Monday 16:01 [carter] Leaving lab, back Tuesday 9 AM

08 Jun 2020 Monday 12:05 [carter] In lab, RM 105, control room, R-65 Found front door open at noon.

08 Jun 2020 Monday 10:45 [Devon] Operator 1 test demo

08 Jun 2020 Monday 06:58 [Ingram] Leaving lab, back later this morning to check on Kratos

08 Jun 2020 Monday 06:44 [Ingram] Entering lab to work in LTR

06 Jun 2020 Saturday 10:37 [Ingram] Leaving lab

06 Jun 2020 Saturday 10:31 [Ingram] Back in LTR

05 Jun 2020 Friday 17:21 [Ingram] Leaving lab

05 Jun 2020 Friday 17:15 [Ingram] Back in LTR

05 Jun 2020 Friday 06:55 [Ingram] Leaving lab. Crates for addition are in driveway but you can drive around them.

05 Jun 2020 Friday 06:47 [Ingram] Working in LTR, Kratos XPS system

04 Jun 2020 Thursday 19:38 [Ingram] Leaving lab, back in the morning

04 Jun 2020 Thursday 19:31 [Ingram] Back in lab, working in LTR.

04 Jun 2020 Thursday 17:57 [Ingram] Leaving the lab

04 Jun 2020 Thursday 15:37 [Ingram] Back in lab, LTR Kratos

04 Jun 2020 Thursday 11:41 [Ingram] Leaving lab back this afternoon.

04 Jun 2020 Thursday 09:28 [Ingram] Back in lab working in LTR by Kratos

04 Jun 2020 Thursday 07:17 [Ingram] Leaving lab, back ~9:00 AM

04 Jun 2020 Thursday 06:59 [Ingram] Entering the lab to work on Kratos in the LTR

03 Jun 2020 Wednesday 17:49 [Ingram] Left the lab, back in the morning.

03 Jun 2020 Wednesday 17:29 [Ingram] Entering the LTR to work on Kratos.

03 Jun 2020 Wednesday 11:06 [Ingram] Leaving lab, back late this afternoon.

03 Jun 2020 Wednesday 09:22 [Ingram] Back in, working around the Kratos XPS system in the LTR

03 Jun 2020 Wednesday 07:08 [Ingram] Leaving lab, will be back later today

03 Jun 2020 Wednesday 06:36 [Ingram] Entering to work in the LTR.

02 Jun 2020 Tuesday 19:39 [Ingram] Leaving the lab, back in the morning.

02 Jun 2020 Tuesday 18:44 [Ingram] Back in working in the LTR

02 Jun 2020 Tuesday 17:30 [Ingram] Leaving lab 5:30 PM will be back later this evening.

02 Jun 2020 Tuesday 12:54 [Ingram] Crane has gone, driveway open. Going into the LTR, I will be in and out of the LTR and my office(106) all afternoon.

02 Jun 2020 Tuesday 12:25 [carter] Access road blocked by crane for equipment being lifted to roof of Chemistry building requiring Phil to walk in to the lab. 2 Jun 8:45 AM

02 Jun 2020 Tuesday 12:11 [carter] Carter worked in 102, 105, 113, and roof with Phil (HVAC). Left building at 12:15 PM 2 Jun

02 Jun 2020 Tuesday 08:45 [carter] Carter in the lab at 8:40 AM 2 Jun

02 Jun 2020 Tuesday 07:15 [Ingram] Left lab 7:15 AM

02 Jun 2020 Tuesday 06:36 [Ingram] Working in LTR (Kratos) 6:35 AM.

01 Jun 2020 Monday 18:41 [Ingram] Left lab 6:45 PM.

01 Jun 2020 Monday 18:40 [Ingram] In lab 4:30 PM

01 Jun 2020 Monday 13:52 [Devon] Devon in the lab Monday, 6/1, 7am -3pm

28 May 2020 Thursday 14:51 [Devon] During this week of hot conditions in the control room, I noticed the Rad Mon strip chart had a number of discontinuities in its recordings. The electronic data did not show the deviations. Hopefully its better now if the AC stays on.

28 May 2020 Thursday 14:17 [Devon] The comfort chiller is back in operation. A low voltage wire harness had a damaged outer jacket and suffered corrosion due to water infiltration. The AC shop repaired the damaged wires for now, and will order a new harness section. Some of the harness plug pins also showed corrosion, may have been the source of the funny refrigerant errors that we had been seeing and wanted to get looked at.

24 May 2020 Sunday 13:47 [Devon] The chiller made it for about 24 hours. I tried to restart it Sunday, comm loss errors won't clear. 100% dead. Lab is swampy. Front door was not closed.

22 May 2020 Friday 12:20 [Devon] The comfort chiller only survived a few hours after the re-start yesterday. I came in this morning to reset and re-start and found that it had shut down on a series of "comm loss" errors. Never seen these errors before, usually its refrigerant related errors, hope it was just a fluke due to rain. The chiller has remained running all morning so far. We will need to monitor the status and reset/start at least once a day to manage humidity. There is a short video on the control room windows computer showing how to do the reset. File is called "chiller restart" but I'll leave the player up. Videos shows you how to get to the controller and push "alarms" and then "reset diagnostics" buttons. If the control screen happens to lock it will tell you to push [1 5 9 enter] to get to the main screen. The control room windows computer has spent all morning getting caught up on updates, should last the weekend at least. Doesn't have an update pause feature.

22 May 2020 Friday 12:19 [Devon] The comfort chiller only survived a few hours after the re-start yesterday. I came in this morning to reset and re-start and found that it had shut down on a series of "comm loss" errors. Never seen these errors before, usually its refrigerant related errors, hope it was just a fluke due to rain. The chiller has remained running all morning so far. We will need to monitor the status and reset/start at least once a day to manage humidity. There is a short video on the control room windows computer showing how to do the reset. File is called "chiller restart" but I'll leave the player up. Videos shows you how to get to the controller and push "alarms" and then "reset diagnostics" buttons. If the control screen happens to lock it will tell you to push [1 5 9 enter] to get to the main screen. The control room windows computer has spent all morning getting caught up on updates, should last the weekend at least. Doesn't have an update pause feature.

22 May 2020 Friday 11:10 [Devon] VESDA computer: In order to try and keep the software active I have told Windows to pause updates until mid-June. I've put an event on the lab calendar, for the first Monday of every month, to update the VESDA. My guess is that every time we do the update regimen we will have to re-active the update pause feature to a date in the following month.

21 May 2020 Thursday 10:50 [Devon] The comfort chiller went out. Cleared the errors and re-started. There is a work order, hopefully will get an advance appointment for escort. Left the control room light on to help the camera view for the end-of-spool line on the Rad Mon strip chart.

07 May 2020 Thursday 11:08 [carter] Restarted computers: Kristyn 115, Som 212, Mansi 213, Alexander 213, yenuel 115, Zach 204 edwards and checked machines in Carl's office. If you experience any problems email carter@ohio.edu.

05 May 2020 Tuesday 09:58 [Devon] Came in to find many troubles on the fire system, filter maintenance due. Computer had auto-re-booted so we didn't get notified. Did the maintenance and cancelled FM work orders. The fire panel disabling instructions worked well. The computer OS can't find any sound device, that will need addressed...

26 Apr 2020 Sunday 16:26 [Ingram] I replaced the nitrogen backfill bottle on the Kratos system. It must have run out during the power outage. There is now one spare nitrogen bottle on the dock. The empty is by the dock door. David

24 Apr 2020 Friday 17:09 [Ingram] The alarm computer is showing an error about not being able to connect to its servor. David

22 Apr 2020 Wednesday 17:53 [carter] Restarted computers: UGL machines in 101,103; Kristyn 115, Som 212, Mansi 213, Alexander 213, yenuel 115, Zach 204 edwards and checked machines in Carl's office. If you experience any problems email carter@ohio.edu.

22 Apr 2020 Wednesday 15:56 [devon] The power has been restored and should remain on. It was discovered that the main feeder wires from Alden to here need to be replaced, heat damage, old insulation, and a size change between here and there. Hopefully this can be addressed during the next campus wide outage. The HVAC, water pumps, and air compressors are back in operation. Will get the process chiller and vacuum systems tomorrow.

16 Apr 2020 Thursday 13:24 [Tom Massey] All filmbadges have been removed from the lab. The door to the mechanical room on the new sided of the building is locked. There has been some work on the air conditioner compressor replacement.

07 Apr 2020 Tuesday 10:25 [Tom Massey] Facilities is working on the air conditioning for the new part of the building.

26 Mar 2020 Thursday 15:07 [Tom Massey] The facilites maintance man came in and adjusted the chilled water valve on the comfort chiller . Vesta is running.

26 Mar 2020 Thursday 09:54 [Devon] Went to the lab late yesterday afternoon. Found the VESDA computer had automatically re-started at some point and was waiting for a log in. There is no text notification to us if the fire software is not running. If you are doing a lab check please look at the VESDA computer. If you see VESDA, good. If you see a windows 10 random photo and windows wants a login, please let me know. I can coach you how to get VESDA started, or come in later to get it started.

25 Mar 2020 Wednesday 13:37 [Tom Massey] Radiation monitor tape changed. All source have now been placed in the source room. All systems look normal.

24 Mar 2020 Tuesday 11:56 [Devon] Thanks Don. Work from home for me on VPN but not on public.

24 Mar 2020 Tuesday 07:32 [carter] Test also allowing 132.x.x.x

24 Mar 2020 Tuesday 04:52 [carter] OUAL logbook now allows writing from remote VPN connections. Let me know if you have issues.

17 Mar 2020 Tuesday 20:54 [Cody Parker + TAMU visitors] Running for the Hoyle state experiment has concluded for this visit. TexAT is currently in the tunnel in a safe shutdown mode. The CO2 and N2 gas bottles are also in tunnel with the regulators disconnected. We have neatly stacked all of our boxes, took down the "clean" room, and shut down our computers. We look forward to returning to make more 3alpha events once it is safe to do so. Thank you to everyone for your help!

17 Mar 2020 Tuesday 10:12 [Thomas Massey] The sulfur hexafluoride low pressure alarm has gone off. The setpoint was reduced slightly to silence the alarm

13 Mar 2020 Friday 13:10 [Devon] We investigated the poor beam transmission around the swinger. It had become a multi hour struggle to get 50% of what was in the swinger cup. First observation was that the gold beam stop of the cell was aligned to the scope but the foil and 1/8 collimator were deflected half the width of the cell - cross hairs of scope on edge of cell up there. Decided to replace the adjustable length snout assy with a fixed length snout since being perfectly centered on rotation is not an issue for this run. While changing snouts we found that the 1/4 collimator assy had drifted half a diameter to beam left (scope cross hairs on edge of hole). Re-aligned the 1/4 and installed an aligned snout. The gas cell still needs to be replaced for cooling concerns and it started losing pressure after being removed and re-installed.

12 Mar 2020 Thursday 09:37 [Brandenburg] The threshold for the terminal charging inbalance (difference in upcharge and downcharge) was changed from 10 to 20 uA. The plot will now turn yellow when it is larger than 20. It will continue to turn red above 50 uA.

11 Mar 2020 Wednesday 11:52 [Tom Massey] Gas cell problems. Water lines leaked after 2 hours of water cooling flow. The 1/4 inch polyethlyene tubing is drawn to points for connection to the gas cell. The connection seems to work best when the tubing inner diameter is just larger than the water cooling tubes. The surfaces to be joined should be clean and free of all solvent. Epoxy should be well mixed before use. The estimated setup time for the epoxy is one hour. The cooling lines can be epoxied on before mounting on the swinger.

06 Mar 2020 Friday 10:19 [carter] Test of double post of messages.

05 Mar 2020 Thursday 17:48 [Tom Massey] The pressure in the gas cell has dropped from 22.0 psia to 18 psia in an hour with 3 microampers of beam on target. The vacuum in the swinger has gone from 1.6E-6 this morning to 4.4E-6 now. The best understanding is that gas is leaking through the foil into the vaccum.

05 Mar 2020 Thursday 14:18 [Tom Massey] The Lens voltage on the Cesium sputter source is at zero for the best beam current. Does anyone know why?

05 Mar 2020 Thursday 10:32 [Devon Jacobs/Tom Massey] A possible cause of the beam instablity was seen. The current at the LOW ENERGY cup was varying rapidly with time. The extractor shows an intermtitant very small voltage variation. The target voltage was stable. The variation in the extractor voltage does not correlate with the current change. This beam current variation is likely due to problems in the cesium sputter source accleration tube. This is the only voltage change which could explain the energy difference in the beam.

03 Mar 2020 Tuesday 14:58 [Tom Massey] The deuterium bottle on the swinger was accidently pumped out. The valve was not completely closed when pumping out the feed line. The deuterium bottle from the chemistry lab was used to fill the gas cell.

03 Mar 2020 Tuesday 14:55 [Tom Massey] The DDR reading is not accepted when saving the header page. The error is "Header File /tmp/header.tandem.data written Error DRDaccum open: Permission denied"

21 Jan 2020 Tuesday 15:36 [carter] Substituted Agilent 34925A FET MUX board in the alphatross control system for the existing Agilent 34923A Reed MUX board to allow long life non mechanical multiplexing of control and logging signals.

07 Jan 2020 Tuesday 10:26 [carter/jacobs] Alphatross "power on" platform power hour meter initial reading 7 Jan 2020 was 15684.3 hours. First Rb load.

03 Jan 2020 Friday 09:20 [Devon] Cesium sputter source: Fresh load of Cs installed in freshly cleaned source. New glove box is nice. Uses about 1/4 bottle of Ar.

13 Dec 2019 Friday 14:54 [Devon] All vacuum systems and the process chiller are shutdown for the Sunday night power outage. Systems will be restored Tuesday due to my absence on Monday.

06 Dec 2019 Friday 12:24 [Devon] Cesium sputter source cleaned. Cs reservoir not installed waiting till January to load with Cs due to numerous scheduled power outages. Replaced the lexan air lock window with a modified design, 4 small thru holes instead of 8 counter bore and tapped holes. The pair of cathode sheaths had developed jagged leading edges over years of sputtering. A pair of old 3/8 sheaths were modified to the 1/2" design. Should be good on sheaths for a number of years.

03 Dec 2019 Tuesday 04:43 [Devon] Fire alarm in the small target room at 4:00 am. Smell of burned electrical but can't find the source at this time, will have to be on the look out for something that doesn't work. VESDA back to normal in room. The fire panel developed an error on reset, doesn't recognize the vault zone, giving trouble alarms, need Life Safety in the morning

26 Nov 2019 Tuesday 10:14 [Devon] Reminder: There is a significant power outage scheduled to occur overnight. I'll have beam line vacuum systems shut down by 2 pm today.

23 Nov 2019 Saturday 12:06 [Devon] The old O2 sensor that was temporarily installed while waiting for a new one chose Saturday to crap out. New sensor had arrived and is installed. Was waiting for Life Safety to give me access and training to disable the buzzer and dialer in the fire panel for VESDA maintenance, was supposed to be yesterday but nothing from them.

18 Nov 2019 Monday 12:53 [Devon] Had to install and calibrate one of the O2 sensors that was replaced in may. The "new" one that was 2 years old quit functioning. The distributer has replaced it with a new one (DOM 8/19) under warranty. Will install it when time permits...

12 Nov 2019 Tuesday 09:54 [Devon] Trouble with the ECO O2 sensors. Got a gas out of range warning on the sensor that was 2 years old when purchased. Xtralis insisted it would be fine. Found it reporting 37% O2. Did calibration, zero gas reading 17% before calibrating to 0. Span calibration wouldn't hold, kept rising to 23%. Airflow was 78, normalized it 100. Redid the span, seems to be creeping up again, will monitor. The other sensor was due for calibration in 2 weeks, did it, no problems.

23 Oct 2019 Wednesday 11:00 [Devon] Forklift back in service, new battery installed

Connection from IP address 34.204.191.145
Time: 2020 Jul 12 10:48:42
Found 2469 logbook entries, displaying most recent 100

Logbook Contents (Most Recent Entries)

09 Jul 2020 Thursday 10:25 [carter] DRD values at quarterly check reset. Console=1.78 Roaming=.04

09 Jul 2020 Thursday 10:24 [CARTER] Quarterly safety checks done, carter/voinov

09 Jul 2020 Thursday 07:26 [Ingram] If you take a flashlight out of the box just inside the door of the control room please put it back there when you return to the control room. Just like any other general purpose tool, we need to share flashlights. Like any tool, they have a place they are stored when not in use which is where we look first. Please be considerate of others and put tools back in the place where they are stored so others may find them efficiently. David Ingram

07 Jul 2020 Tuesday 10:09 [Devon] Sputter source: Abruptly shutdown last night in conjunction with both water level and water flow alarms. Came in this morning to find a cooling line had come off the source and the loop had pumped itself dry, water all over the floor. Exactly as predicted in the emergency procedure book, protective systems functioned as expected. Cooling loop is refilled and source is back on. We are out of distilled water and very low on distilled/deionized water in the TFL, need a campaign of water processing...

05 Jul 2020 Sunday 14:35 [Tom Massey] The neutron sources have been returned to the source room.

30 Jun 2020 Tuesday 15:07 [Tom Massey] The alphatross has been giving 800 to 900 nA at the low enrgy cup. There are fluctuations in the beam. These fluctuations are showing up as a change in the X-Profile also on the R65 beam leg.

30 Jun 2020 Tuesday 09:16 [Devon] 2X and 2Y are off. Since the tics appear in the source cup it could be Probe, Extractor, Focus, or Bias, or source steerers.

30 Jun 2020 Tuesday 08:40 [Carter] From logging looks like some ticks are coincident with ticks in probe current. Another note, yesterday Kristyn suspected Y movement of beam ar source. We turned off the 2Y and 2X steerer power suppliessince they weren’t needed. Are they still off?

30 Jun 2020 Tuesday 08:18 [Devon] Alphatross: We left the source running overnight. The beam has increased but developed a periodic tic. Bouncing between 800 and 900 nA. The tic is also present in the source faraday cup which is measuring 4.5 uA negative beam. ??

29 Jun 2020 Monday 14:53 [Tom Massey] All Pu(Be) and Cf-252 sources have been put in the tunnel for Kristyn's experiment.

26 Jun 2020 Friday 11:52 [Devon] Alphatross: New plasma components installed. The fiber optic module on the source deck is plugged into regular building AC power in order to flow Helium thru the system for the weekend as a clean up. The source is not usable in this configuration. I'm not sure about the viability of the rubidium charge. Even though Ar was freely flowing out of the source during the first repair attempt, the Rb could be seen bubbling around the aperture to the Rb chamber. Then there was a small leak of air during pump down. The high vacuum pump down was slow and never quite reached what we had seen as baseline (high 10**-8) while we waited for parts. Today the Rb chamber entrance was white and mostly occluded. Poked it with an allen wrench to open up the hole, little fire balls flew, really reactive stuff. We won't know until we get it up to operating temperatures next week.

25 Jun 2020 Thursday 13:42 [Tom Massey] Seth Waldron from Life checked all of the fire exinguishers in the building. All CO2 were within 5 years of hydro testing and all Chemical were within 6 years of hydro testing.

23 Jun 2020 Tuesday 13:04 [Devon] Alphatross: The source developed a condition yesterday where the Probe current would run away (>8 mA) in the presence of just the plasma, no probe voltage. 350 hours of operation. A visual inspection showed that the quartz plasma bottle was coated with a milky white substance and the boron nitride insulator was plated with dark material. The assumption was that the plating was allowing too much current to reach the grounded Ta canal behind the insulator. The plan today was to replace the bottle, insulator, and canal while openly flowing Ar to protect the Rubidium. While removing the used bottle, the aluminum aperture behind the Ta canal also came out. The hole in this aperture had been plated on one side and sputtered away on the other side resulting in a severely off-axis aperture. We were not given any spare apertures with the source order. We were given 2 plasma bottles and 2 sets of insulator/canals. I was about to use 1 new bottle and the last insulator/canal but could not proceed with this aperture. I called NEC. They said the aperture is considered a wear item, they have 500+ in stock. They had no comment on the fact that it wore so bad after several hundred hours. We had a $1300 credit with them, so I ordered 6 apertures, 2 sets of insulator/canals, and another glass bottle. They should ship today. The source is back under vacuum while we wait for parts to complete the repair.

23 Jun 2020 Tuesday 10:42 [carter] The previous fix for DRDaccum didn't work. I have now moved the DRDaccum file to /var/www/html/DRDaccum with ownership of apache.apache. This seems to be working OK now. I also made a symbolic link to /var/www/html/DRDaccum in /home/carter for easy access.

18 Jun 2020 Thursday 15:18 [Tom Massey] All of the neutron sources have been put in the tunnel to reduce the neutron background for the current experiment. They will be returned to the Source Room following the experiment.

14 Jun 2020 Sunday 16:15 [carter] Left lab at 2:30 but posted message at 4:00

11 Jun 2020 Thursday 10:16 [carter] Attempted to correct permissions issue with /home/carter on control1. It seems that in order to allow passwordless logins from alphatross.oual.ohiou.edu to copy the alphatross data to control1, the directory /home/carter/ on control1 must have permissions 700. Conflicting, to allow apache httpd to write the DRDaccum file from the accelerator header webpage, the /home/carter/ directory permissions need to be 777. To allow the logging, I have modified /home/carter/ permissions to 700 and moved the DRDaccum file to /var/www/cgi-bin/ and modified the file /var/www/cgi-bin/tandem_log to reflect this location change. I have copied the old DRDaccum file to /var/www/cgi-bin/DRDaccum and also to a backup DRDaccum_11Jun2020. I have also created a symbolic link in /home/carter/DRDaccum the points to the new file location.

10 Jun 2020 Wednesday 14:03 [Devon] I made a collection of videos of alphatross operation. I hope to combine them into 1 video, but either way, I'm ready to try a teams training session next week. The source had all the signs of contamination after the long rest and numerous power outages. It only gave 300 nA of 4He, had sizable Oxygen peaks, and the settings were not what we had began to consider normal. It will need run for a few days to clean up.

10 Jun 2020 Wednesday 09:43 [Donald Carter] Hallways being waxed today so access to the lab may be limited.

08 Jun 2020 Monday 16:04 [carter] Left lab at 2:30 but posted message at 4:00

08 Jun 2020 Monday 16:01 [carter] Leaving lab, back Tuesday 9 AM

08 Jun 2020 Monday 12:05 [carter] In lab, RM 105, control room, R-65 Found front door open at noon.

08 Jun 2020 Monday 10:45 [Devon] Operator 1 test demo

08 Jun 2020 Monday 06:58 [Ingram] Leaving lab, back later this morning to check on Kratos

08 Jun 2020 Monday 06:44 [Ingram] Entering lab to work in LTR

06 Jun 2020 Saturday 10:37 [Ingram] Leaving lab

06 Jun 2020 Saturday 10:31 [Ingram] Back in LTR

05 Jun 2020 Friday 17:21 [Ingram] Leaving lab

05 Jun 2020 Friday 17:15 [Ingram] Back in LTR

05 Jun 2020 Friday 06:55 [Ingram] Leaving lab. Crates for addition are in driveway but you can drive around them.

05 Jun 2020 Friday 06:47 [Ingram] Working in LTR, Kratos XPS system

04 Jun 2020 Thursday 19:38 [Ingram] Leaving lab, back in the morning

04 Jun 2020 Thursday 19:31 [Ingram] Back in lab, working in LTR.

04 Jun 2020 Thursday 17:57 [Ingram] Leaving the lab

04 Jun 2020 Thursday 15:37 [Ingram] Back in lab, LTR Kratos

04 Jun 2020 Thursday 11:41 [Ingram] Leaving lab back this afternoon.

04 Jun 2020 Thursday 09:28 [Ingram] Back in lab working in LTR by Kratos

04 Jun 2020 Thursday 07:17 [Ingram] Leaving lab, back ~9:00 AM

04 Jun 2020 Thursday 06:59 [Ingram] Entering the lab to work on Kratos in the LTR

03 Jun 2020 Wednesday 17:49 [Ingram] Left the lab, back in the morning.

03 Jun 2020 Wednesday 17:29 [Ingram] Entering the LTR to work on Kratos.

03 Jun 2020 Wednesday 11:06 [Ingram] Leaving lab, back late this afternoon.

03 Jun 2020 Wednesday 09:22 [Ingram] Back in, working around the Kratos XPS system in the LTR

03 Jun 2020 Wednesday 07:08 [Ingram] Leaving lab, will be back later today

03 Jun 2020 Wednesday 06:36 [Ingram] Entering to work in the LTR.

02 Jun 2020 Tuesday 19:39 [Ingram] Leaving the lab, back in the morning.

02 Jun 2020 Tuesday 18:44 [Ingram] Back in working in the LTR

02 Jun 2020 Tuesday 17:30 [Ingram] Leaving lab 5:30 PM will be back later this evening.

02 Jun 2020 Tuesday 12:54 [Ingram] Crane has gone, driveway open. Going into the LTR, I will be in and out of the LTR and my office(106) all afternoon.

02 Jun 2020 Tuesday 12:25 [carter] Access road blocked by crane for equipment being lifted to roof of Chemistry building requiring Phil to walk in to the lab. 2 Jun 8:45 AM

02 Jun 2020 Tuesday 12:11 [carter] Carter worked in 102, 105, 113, and roof with Phil (HVAC). Left building at 12:15 PM 2 Jun

02 Jun 2020 Tuesday 08:45 [carter] Carter in the lab at 8:40 AM 2 Jun

02 Jun 2020 Tuesday 07:15 [Ingram] Left lab 7:15 AM

02 Jun 2020 Tuesday 06:36 [Ingram] Working in LTR (Kratos) 6:35 AM.

01 Jun 2020 Monday 18:41 [Ingram] Left lab 6:45 PM.

01 Jun 2020 Monday 18:40 [Ingram] In lab 4:30 PM

01 Jun 2020 Monday 13:52 [Devon] Devon in the lab Monday, 6/1, 7am -3pm

28 May 2020 Thursday 14:51 [Devon] During this week of hot conditions in the control room, I noticed the Rad Mon strip chart had a number of discontinuities in its recordings. The electronic data did not show the deviations. Hopefully its better now if the AC stays on.

28 May 2020 Thursday 14:17 [Devon] The comfort chiller is back in operation. A low voltage wire harness had a damaged outer jacket and suffered corrosion due to water infiltration. The AC shop repaired the damaged wires for now, and will order a new harness section. Some of the harness plug pins also showed corrosion, may have been the source of the funny refrigerant errors that we had been seeing and wanted to get looked at.

24 May 2020 Sunday 13:47 [Devon] The chiller made it for about 24 hours. I tried to restart it Sunday, comm loss errors won't clear. 100% dead. Lab is swampy. Front door was not closed.

22 May 2020 Friday 12:20 [Devon] The comfort chiller only survived a few hours after the re-start yesterday. I came in this morning to reset and re-start and found that it had shut down on a series of "comm loss" errors. Never seen these errors before, usually its refrigerant related errors, hope it was just a fluke due to rain. The chiller has remained running all morning so far. We will need to monitor the status and reset/start at least once a day to manage humidity. There is a short video on the control room windows computer showing how to do the reset. File is called "chiller restart" but I'll leave the player up. Videos shows you how to get to the controller and push "alarms" and then "reset diagnostics" buttons. If the control screen happens to lock it will tell you to push [1 5 9 enter] to get to the main screen. The control room windows computer has spent all morning getting caught up on updates, should last the weekend at least. Doesn't have an update pause feature.

22 May 2020 Friday 12:19 [Devon] The comfort chiller only survived a few hours after the re-start yesterday. I came in this morning to reset and re-start and found that it had shut down on a series of "comm loss" errors. Never seen these errors before, usually its refrigerant related errors, hope it was just a fluke due to rain. The chiller has remained running all morning so far. We will need to monitor the status and reset/start at least once a day to manage humidity. There is a short video on the control room windows computer showing how to do the reset. File is called "chiller restart" but I'll leave the player up. Videos shows you how to get to the controller and push "alarms" and then "reset diagnostics" buttons. If the control screen happens to lock it will tell you to push [1 5 9 enter] to get to the main screen. The control room windows computer has spent all morning getting caught up on updates, should last the weekend at least. Doesn't have an update pause feature.

22 May 2020 Friday 11:10 [Devon] VESDA computer: In order to try and keep the software active I have told Windows to pause updates until mid-June. I've put an event on the lab calendar, for the first Monday of every month, to update the VESDA. My guess is that every time we do the update regimen we will have to re-active the update pause feature to a date in the following month.

21 May 2020 Thursday 10:50 [Devon] The comfort chiller went out. Cleared the errors and re-started. There is a work order, hopefully will get an advance appointment for escort. Left the control room light on to help the camera view for the end-of-spool line on the Rad Mon strip chart.

07 May 2020 Thursday 11:08 [carter] Restarted computers: Kristyn 115, Som 212, Mansi 213, Alexander 213, yenuel 115, Zach 204 edwards and checked machines in Carl's office. If you experience any problems email carter@ohio.edu.

05 May 2020 Tuesday 09:58 [Devon] Came in to find many troubles on the fire system, filter maintenance due. Computer had auto-re-booted so we didn't get notified. Did the maintenance and cancelled FM work orders. The fire panel disabling instructions worked well. The computer OS can't find any sound device, that will need addressed...

26 Apr 2020 Sunday 16:26 [Ingram] I replaced the nitrogen backfill bottle on the Kratos system. It must have run out during the power outage. There is now one spare nitrogen bottle on the dock. The empty is by the dock door. David

24 Apr 2020 Friday 17:09 [Ingram] The alarm computer is showing an error about not being able to connect to its servor. David

22 Apr 2020 Wednesday 17:53 [carter] Restarted computers: UGL machines in 101,103; Kristyn 115, Som 212, Mansi 213, Alexander 213, yenuel 115, Zach 204 edwards and checked machines in Carl's office. If you experience any problems email carter@ohio.edu.

22 Apr 2020 Wednesday 15:56 [devon] The power has been restored and should remain on. It was discovered that the main feeder wires from Alden to here need to be replaced, heat damage, old insulation, and a size change between here and there. Hopefully this can be addressed during the next campus wide outage. The HVAC, water pumps, and air compressors are back in operation. Will get the process chiller and vacuum systems tomorrow.

16 Apr 2020 Thursday 13:24 [Tom Massey] All filmbadges have been removed from the lab. The door to the mechanical room on the new sided of the building is locked. There has been some work on the air conditioner compressor replacement.

07 Apr 2020 Tuesday 10:25 [Tom Massey] Facilities is working on the air conditioning for the new part of the building.

26 Mar 2020 Thursday 15:07 [Tom Massey] The facilites maintance man came in and adjusted the chilled water valve on the comfort chiller . Vesta is running.

26 Mar 2020 Thursday 09:54 [Devon] Went to the lab late yesterday afternoon. Found the VESDA computer had automatically re-started at some point and was waiting for a log in. There is no text notification to us if the fire software is not running. If you are doing a lab check please look at the VESDA computer. If you see VESDA, good. If you see a windows 10 random photo and windows wants a login, please let me know. I can coach you how to get VESDA started, or come in later to get it started.

25 Mar 2020 Wednesday 13:37 [Tom Massey] Radiation monitor tape changed. All source have now been placed in the source room. All systems look normal.

24 Mar 2020 Tuesday 11:56 [Devon] Thanks Don. Work from home for me on VPN but not on public.

24 Mar 2020 Tuesday 07:32 [carter] Test also allowing 132.x.x.x

24 Mar 2020 Tuesday 04:52 [carter] OUAL logbook now allows writing from remote VPN connections. Let me know if you have issues.

17 Mar 2020 Tuesday 20:54 [Cody Parker + TAMU visitors] Running for the Hoyle state experiment has concluded for this visit. TexAT is currently in the tunnel in a safe shutdown mode. The CO2 and N2 gas bottles are also in tunnel with the regulators disconnected. We have neatly stacked all of our boxes, took down the "clean" room, and shut down our computers. We look forward to returning to make more 3alpha events once it is safe to do so. Thank you to everyone for your help!

17 Mar 2020 Tuesday 10:12 [Thomas Massey] The sulfur hexafluoride low pressure alarm has gone off. The setpoint was reduced slightly to silence the alarm

13 Mar 2020 Friday 13:10 [Devon] We investigated the poor beam transmission around the swinger. It had become a multi hour struggle to get 50% of what was in the swinger cup. First observation was that the gold beam stop of the cell was aligned to the scope but the foil and 1/8 collimator were deflected half the width of the cell - cross hairs of scope on edge of cell up there. Decided to replace the adjustable length snout assy with a fixed length snout since being perfectly centered on rotation is not an issue for this run. While changing snouts we found that the 1/4 collimator assy had drifted half a diameter to beam left (scope cross hairs on edge of hole). Re-aligned the 1/4 and installed an aligned snout. The gas cell still needs to be replaced for cooling concerns and it started losing pressure after being removed and re-installed.

12 Mar 2020 Thursday 09:37 [Brandenburg] The threshold for the terminal charging inbalance (difference in upcharge and downcharge) was changed from 10 to 20 uA. The plot will now turn yellow when it is larger than 20. It will continue to turn red above 50 uA.

11 Mar 2020 Wednesday 11:52 [Tom Massey] Gas cell problems. Water lines leaked after 2 hours of water cooling flow. The 1/4 inch polyethlyene tubing is drawn to points for connection to the gas cell. The connection seems to work best when the tubing inner diameter is just larger than the water cooling tubes. The surfaces to be joined should be clean and free of all solvent. Epoxy should be well mixed before use. The estimated setup time for the epoxy is one hour. The cooling lines can be epoxied on before mounting on the swinger.

06 Mar 2020 Friday 10:19 [carter] Test of double post of messages.

05 Mar 2020 Thursday 17:48 [Tom Massey] The pressure in the gas cell has dropped from 22.0 psia to 18 psia in an hour with 3 microampers of beam on target. The vacuum in the swinger has gone from 1.6E-6 this morning to 4.4E-6 now. The best understanding is that gas is leaking through the foil into the vaccum.

05 Mar 2020 Thursday 14:18 [Tom Massey] The Lens voltage on the Cesium sputter source is at zero for the best beam current. Does anyone know why?

05 Mar 2020 Thursday 10:32 [Devon Jacobs/Tom Massey] A possible cause of the beam instablity was seen. The current at the LOW ENERGY cup was varying rapidly with time. The extractor shows an intermtitant very small voltage variation. The target voltage was stable. The variation in the extractor voltage does not correlate with the current change. This beam current variation is likely due to problems in the cesium sputter source accleration tube. This is the only voltage change which could explain the energy difference in the beam.

03 Mar 2020 Tuesday 14:58 [Tom Massey] The deuterium bottle on the swinger was accidently pumped out. The valve was not completely closed when pumping out the feed line. The deuterium bottle from the chemistry lab was used to fill the gas cell.

03 Mar 2020 Tuesday 14:55 [Tom Massey] The DDR reading is not accepted when saving the header page. The error is "Header File /tmp/header.tandem.data written Error DRDaccum open: Permission denied"

21 Jan 2020 Tuesday 15:36 [carter] Substituted Agilent 34925A FET MUX board in the alphatross control system for the existing Agilent 34923A Reed MUX board to allow long life non mechanical multiplexing of control and logging signals.

07 Jan 2020 Tuesday 10:26 [carter/jacobs] Alphatross "power on" platform power hour meter initial reading 7 Jan 2020 was 15684.3 hours. First Rb load.

03 Jan 2020 Friday 09:20 [Devon] Cesium sputter source: Fresh load of Cs installed in freshly cleaned source. New glove box is nice. Uses about 1/4 bottle of Ar.

13 Dec 2019 Friday 14:54 [Devon] All vacuum systems and the process chiller are shutdown for the Sunday night power outage. Systems will be restored Tuesday due to my absence on Monday.

06 Dec 2019 Friday 12:24 [Devon] Cesium sputter source cleaned. Cs reservoir not installed waiting till January to load with Cs due to numerous scheduled power outages. Replaced the lexan air lock window with a modified design, 4 small thru holes instead of 8 counter bore and tapped holes. The pair of cathode sheaths had developed jagged leading edges over years of sputtering. A pair of old 3/8 sheaths were modified to the 1/2" design. Should be good on sheaths for a number of years.

03 Dec 2019 Tuesday 04:43 [Devon] Fire alarm in the small target room at 4:00 am. Smell of burned electrical but can't find the source at this time, will have to be on the look out for something that doesn't work. VESDA back to normal in room. The fire panel developed an error on reset, doesn't recognize the vault zone, giving trouble alarms, need Life Safety in the morning

26 Nov 2019 Tuesday 10:14 [Devon] Reminder: There is a significant power outage scheduled to occur overnight. I'll have beam line vacuum systems shut down by 2 pm today.

23 Nov 2019 Saturday 12:06 [Devon] The old O2 sensor that was temporarily installed while waiting for a new one chose Saturday to crap out. New sensor had arrived and is installed. Was waiting for Life Safety to give me access and training to disable the buzzer and dialer in the fire panel for VESDA maintenance, was supposed to be yesterday but nothing from them.

18 Nov 2019 Monday 12:53 [Devon] Had to install and calibrate one of the O2 sensors that was replaced in may. The "new" one that was 2 years old quit functioning. The distributer has replaced it with a new one (DOM 8/19) under warranty. Will install it when time permits...

12 Nov 2019 Tuesday 09:54 [Devon] Trouble with the ECO O2 sensors. Got a gas out of range warning on the sensor that was 2 years old when purchased. Xtralis insisted it would be fine. Found it reporting 37% O2. Did calibration, zero gas reading 17% before calibrating to 0. Span calibration wouldn't hold, kept rising to 23%. Airflow was 78, normalized it 100. Redid the span, seems to be creeping up again, will monitor. The other sensor was due for calibration in 2 weeks, did it, no problems.

23 Oct 2019 Wednesday 11:00 [Devon] Forklift back in service, new battery installed