Differences

This shows you the differences between two versions of the page.

--- playground:startup [2023/08/08 07:34]
carter
+++ playground:startup [2024/04/05 04:25] (current)
carter
@@ Line 1: / Line 1: @@
 ====== Accelerator Start-up ======
+=== ==== **  Clear all Areas   ** ==== ===
 .	**Verify Initial Machine Voltage setup:**
@@ Line 24: / Line 27: @@
   * POWER:   Red Light On
   * CABLE:   Green Light On
@@ Line 37: / Line 39: @@
 **2.	Corona Probe Adjustment**
-After reaching the approximate desired terminal voltage with no corona current present, begin moving the corona points in.  Maintain the desired approximate terminal voltage by increasing the UPCHARGE and iteratively move the corona points in while restoring the terminal voltage with the UPCHARGE.  The CORONA PROBE CURRENT will rise until it reaches the value set by the BIAS CURRENT.  After that, the GRID VOLTAGE will change to keep the CORONA PROBE CURRENT at the set value.  The goal is to balance the UPCHARGE and CORONA PROBE POSITION so that you have the desired TERMINAL VOLTAGE and **-5** VDC on the GRID VOLTAGE (The GRID VOLTAGE may never reach -5 VDC when running at ultra low Terminal energy, E < 0.300 MV, do the best you can).  Do (a) or (b) as needed:
+After reaching the approximate desired terminal voltage with no corona current present, begin moving the corona points in (set corona current/position to current).  Maintain the desired approximate terminal voltage by increasing the UPCHARGE and iteratively move the corona points in while restoring the terminal voltage with the UPCHARGE.  The CORONA PROBE CURRENT will rise until it reaches the value set by the BIAS CURRENT.  After that, the GRID VOLTAGE will change to keep the CORONA PROBE CURRENT at the set value.  The goal is to balance the UPCHARGE and CORONA PROBE POSITION so that you have the desired TERMINAL VOLTAGE and **-5** VDC on the GRID VOLTAGE (The GRID VOLTAGE may never reach -5 VDC when running at ultra low Terminal energy, E < 0.300 MV, do the best you can).  Do (a) or (b) as needed:
 a.	Move the CORONA PROBE POSITION “IN” to make the GRID VOLTAGE more negative.  This may require you to adjust the UPCHARGE to maintain TERMINAL VOLTAGE.
@@ Line 53: / Line 55: @@
 b.	Slowly raise the CONTROL GAIN to 2-3 for low current beams, around 5 for high current beams.  The system is now controlling in GVM mode.
-c.	Make fine adjustments to the TERMINAL VOLTAGE Dial to reach exactly the desired GVM value.
+c.	Make fine adjustments to the TERMINAL VOLTAGE Dial to reach exactly the desired GVM value.  Very fine adjustments to the terminal voltage can be made using the FINE control located coaxial to the BIAS CURRENT control with a full range of 1.5 KV.
 d.	Switch OVERVOLTAGE PROTECTION to ENABLE.
+e.      Do accelerator header and collect the NMR frequency and analyzer magnet current values.
 **4.	Beam Transport**
-a.      Use the magnet predictor tool and set Quad 1 to the predicted value.
+a.      Use the magnet predictor tool and set Quad 1 to the predicted value.  Do not make large abrupt changes to the Quad 1 current.  If a large abrupt change in current is attempted, the power supply may begin oscillating.  To stop this oscillation, run the current slider to zero then re-adjust to the desired current at a slower non-abrupt rate.
 b.	Tune beam and send it around the properly configured Analyzing Magnet.
@@ Line 71: / Line 75: @@
 **5.	Dipole Magnet Setup Instructions**
- **FOR OPERATION IN THE LARGE AND SMALL TARGET AREAS
+ a. Confirm that the Heinzinger power supplies are powered ON in the Small Target Room with the following LED's illuminated:  Red "ON", and Green "Remote".  If Off, Press the "Local/Remote" button to "Local"; then "Stby" then "On"; then "Local/Remote" to "Remote".
-**
- a.  Make sure both "analyzer" and "switcher_hz422" GUI's are turned down to zero amps using the GUI slider.
- b.  Confirm that the breaker on the beamline near the analyzer magnet is in the down "switch" position.
- c.  Switch the console "300 Amp ANAL/SWINGER" power supply to the "ANAL" mode using the deflection pushbutton switch.  If in the "SWING" mode press the "deflection" push button switch and wait for it to switch to the "ANAL" (right) mode, then press the "ON" pushbutton switch.
- d. Confirm that the "SWINGER" Heinzinger power supply is on with the following LED's illuminated:  Red "ON", and Green "Remote".  If Off, Press the "Local/Remote" button to "Local"; then "Stby" then "On"; then "Local/Remote" to "Remote".
- e. In "Switcher_hz422" GUI window, magnet deflection (left/right) is indicated on the "Switcher Magnet Current" line indicated as beam "left or right".
- f. The polarity can be toggled using the "Polarity" button located to the right of the "Lock" button.  When the "Polarity" button is pressed, the magnet current will automatically be set to zero and the polarity will reverse.
- g. Run the slider to the desired current.
-**  FOR OPERATION ON THE SWINGER MAGNET
-**
- a.  Make sure both "analyzer" and "switcher_hz422" GUI's are turned down to zero amps using the GUI slider.
- b.  Confirm that the breaker on the beamline near the analyzer magnet is in the up "null" position.
- c. Switch the "300 Amp ANAL/SWINGER" power supply to the "SWING" mode using the deflection pushbutton switch.  If in the "ANAL" mode press the "deflection" push button switch and wait for it to switch to the "SWING" (left) mode, then press the "ON" pushbutton switch.
- d. Confirm that the "SWINGER" Heinzinger power supply is on with the following LED's illuminated:  Red "ON", and Green "Remote".  If Off, Press the "Local/Remote" button to "Local"; then "Stby" then "On"; then "Local/Remote" to "Remote".
- e. Do not go over 20 Amps of Switcher/Anal current in the null mode.  If you do, the breaker near the analyzer magnet may trip and need to be reset to the "Null" position after running the magnet to zero current.
- f. The polarity can be toggled using the "Polarity" button located to the right of the "Lock" button.  When the "Polarity" button is pressed, the magnet current will automaticaly be set to zero and the polarity will reverse.
- g. Run the slider to the desired current.
+ b. If not already visible on the control room computer screen, start the appropriate software GUI's using the "Restart" button for "analyzer, switcher, swinger, or tweaker" magnets.
+ c. In the "Switcher_hz422" and "Analyzer_hz422" GUI windows, magnet beam deflection (left/right) is indicated on the "Magnet Current" line indicated as beam "left or right". The polarity can be toggled using the "Polarity" button located to the right of the "Lock" button.  When the "Polarity" button is pressed, the magnet current will automatically be set to zero and the polarity will reverse when the new magnet current is set.  The "Swinger_hz422" and "Tweaker" have no polarity reversal button.
+ d. Run the slider to the desired current.

Accelerator Handbook

User Tools

Site Tools

Differences

Page Tools