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playground:alpha [2010/07/16 16:00]
132.235.40.102
playground:alpha [2012/11/27 08:37]
jacobs
Line 3: Line 3:
 ** Duoplasmatron Instructions ** ** Duoplasmatron Instructions **
  
-Please study the diagram.  +**Please study the diagram ​below.** 
-{{playground:​duoplasmatron.jpg|}}+ 
 +{{playground:​duo.jpg|}}
  
  
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 You need to determine what the state of the source is before you do anything. Depending on the electrical and vacuum status the source will be starting from cold, warm, or standby. You need to determine what the state of the source is before you do anything. Depending on the electrical and vacuum status the source will be starting from cold, warm, or standby.
  
-The first check you need to make is on the vacuum status of the source. The source pressure should be less than 5x10-6 torr. If it is not find out why before going any further.+The first check you need to make is on the vacuum status of the source. The source pressure should be less than 5x10<sup>-6</​sup> ​torr. If it is not find out why before going any further.
  
 If the control power for the machine, and/or for the source are off, or if the sodium canal supply is off or at zero current, you are starting from the cold state. If the control power for the machine, and/or for the source are off, or if the sodium canal supply is off or at zero current, you are starting from the cold state.
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 At the Control Console: At the Control Console:
  
-1. Check the source vacuum is less than 5x10-6 torr.+1. Check the source vacuum is less than 5x10<sup>-6</​sup> ​torr.
  
 In the Vault: In the Vault:
  
-1. Check the vacuum in the low energy extension is less than 5x10-6 torr then open the tube gate valve on the ion source vacuum control panel.+1. Check the vacuum in the low energy extension is less than 5x10<sup>-6</​sup> ​torr then open the tube gate valve on the ion source vacuum control panel.
  
-2. Check valve on gas supply bottle is open and regulator set for ~5 psig. Note this will be the case unless work has been done on the gas supply systems, the supply bottle is very low (causing the regulator to read high), or you are changing between ​4He and 3He. See instructions below on running ​3He. If is suspected that there is air or another contaminant in the gas lines then they should be roughed out and purged three times using the roughing pump on the leak checker.+2. Check valve on gas supply bottle is open and regulator set for ~5 psig. Note this will be the case unless work has been done on the gas supply systems, the supply bottle is very low (causing the regulator to read high), or you are changing between ​<​sup>​4</​sup>​He ​and <​sup>​3</​sup>​He. See instructions below on running ​<​sup>​3</​sup>​He. If is suspected that there is air or another contaminant in the gas lines then they should be roughed out and purged three times using the roughing pump on the leak checker.
  
 On the way back to the control room: On the way back to the control room:
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 Back at the Control Console: Back at the Control Console:
  
-1. Turn source magnet up to ~0.2 A. (likely already set)+1. Turn source magnet up to ~0.2 A. (likely already set, and it can be as high as 1.4 A)
  
-2. Turn up the source gas until the pressure on the source tc gauge is ~150 microns.+2. Turn up the source gas until the pressure on the source tc gauge is ~300 microns (sometimes higher pressures are needed to start the source, but the source will run as low as 150 microns ​and the lower the pressure the better the quality of the beam and the less gas is used: a consideration when running <​sup>​3</​sup>​He).
  
-3. Set the Arc Voltage to 150 V.+3. Set the Arc Voltage to ~190 V.
  
-4. Turn on the extraction supply, it should be set for 10-12 kV.� This will also bring up exchange canal power supply to about 13 kV.+4. Turn on the extraction supply, it should be set for 10-12 kV. This will also bring up exchange canal power supply to about 13 kV.
  
 5. Turn on the focus supply, it should be set for ~2 kV. 5. Turn on the focus supply, it should be set for ~2 kV.
  
-6. Turn up the sodium heater current to 0.55 A, and the filament current up slowly, over 30 seconds, until the arc starts.+6. Turn up the sodium heater current to 0.55 A.
  
-7. When the arc starts, ​70 A for an old filament, ​90 A for a new filament, observe the Arc Voltage and keep it at 150 V.+7. Slowly turn up the Filament Current to 40-50 A and wait 5 minutes. ​ Continue to raise the Filament Current until the arc starts, ​60 A for an old filament, ​70 a for a new filament, observe the Arc Voltage and keep it at 150 V.
  
 8. Carry on increasing the filament current until the arc current reaches 2.5 A, keep the Arc Voltage at 150 V. 8. Carry on increasing the filament current until the arc current reaches 2.5 A, keep the Arc Voltage at 150 V.
  
-9. Increase the sodium heater current ​ until it reaches 0.65 A, or whatever was used the last time the source was run – check the log.+9. Increase the sodium heater current ​ until it reaches ​up to 0.A, **or whatever was used the last time** the source was run – check the log.
  
-10. Set the inflection magnet to 0.8 amps and LEFT deflection.+10. Set the inflection magnet to about 0.8 amps and LEFT deflection.
  
 11. To obtain the maximum current adjust the following: 11. To obtain the maximum current adjust the following:
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 12. Typical Settings: 12. Typical Settings:
           * Extraction :                12 kV @ < 1 mA           * Extraction :                12 kV @ < 1 mA
-          * Attachment                ​13 kV @ 1 mA+          * Exchange Canal            ​13 kV @ 1 mA
           * Focus: ​                      2 kV @ 1.5 mA           * Focus: ​                      2 kV @ 1.5 mA
-          * Magnet :                   ​0.2 ​A +          * Magnet :                   ​0.2 ​- 1.4A 
-          * Heater: ​                    0.67 A+          * Heater: ​                    0.58 A
           * Arc Voltage: ​        150 V           * Arc Voltage: ​        150 V
           * Filament Current: ​    70 - 90 amps           * Filament Current: ​    70 - 90 amps
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           * 2Y:                          5.00           * 2Y:                          5.00
           * 2X:                          5.00           * 2X:                          5.00
- +          * Box Vacuum: ​    ​2.0x10E<sup>-6</​sup> ​ torr
-Box Vacuum: ​    ​2.0x10E-6 ​ torr+
  
 ** Starting from cold ** ** Starting from cold **
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 2. Turn on source control power key at the source (if it is off). 2. Turn on source control power key at the source (if it is off).
  
-3. Check the source vacuum is less than 5x10-6 torr.+3. Check the source vacuum is less than 5x10<sup>-6</​sup> ​torr.
  
 4. Make sure the voltage is turned down on EINZEL LENS B. 4. Make sure the voltage is turned down on EINZEL LENS B.
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 In the Vault: In the Vault:
  
-1. Check the vacuum in the low energy extension is less than 5x10-6 torr then open the tube gate valve on the ion source vacuum control panel.+1. Check the vacuum in the low energy extension is less than 5x10<sup>-6</​sup> ​torr then open the tube gate valve on the ion source vacuum control panel.
  
 2. Check valve on gas supply bottle is open and regulator set for ~5 psig. Note this will be the case unless work has been done on the gas supply systems, the supply bottle is very low (causing the regulator to read high), or you are changing between 4He and 3He. See instructions below on running 3He. If it is suspected that there is air or another contaminant in the gas lines then they should be roughed out and purged three times using the roughing pump attached to the helium manifold. 2. Check valve on gas supply bottle is open and regulator set for ~5 psig. Note this will be the case unless work has been done on the gas supply systems, the supply bottle is very low (causing the regulator to read high), or you are changing between 4He and 3He. See instructions below on running 3He. If it is suspected that there is air or another contaminant in the gas lines then they should be roughed out and purged three times using the roughing pump attached to the helium manifold.
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 1. Increase the sodium heater current slowly, over 30 seconds, to 0.3 A. 1. Increase the sodium heater current slowly, over 30 seconds, to 0.3 A.
  
-2. Observe the source pressure, it will probably rise especially if the sodium has just been changed. Wait twenty minutes, if the pressure after this time is greater than 1x10-5 torr (10x10-6 torr) do not proceed further until it has fallen below this value.+2. Observe the source pressure, it will probably rise especially if the sodium has just been changed. Wait twenty minutes, if the pressure after this time is greater than 1x10<sup>-5</​sup> ​torr (10x10<sup>-6</​sup> ​torr) do not proceed further until it has fallen below this value.
  
-3. Turn source magnet up to ~0.2 A.+3. Turn source magnet up to ~0.2 A. (likely already set, and it can be as high as 1.4 A)
  
-4. Turn up the source gas until the pressure on the source tc gauge is ~150 microns.+4. Turn up the source gas until the pressure on the source tc gauge is ~300 microns.
  
-5. Slowly, over 30 seconds, run up the filament current to ~40 amps. Wait twenty minutes, if the pressure after this time is greater than 1x10-5 torr (10x10-6 torr) do not proceed further until it has fallen below this value.+5. Slowly, over 30 seconds, run up the filament current to ~40 amps. Wait twenty minutes, if the pressure after this time is greater than 1x10<sup>-5</​sup> ​torr (10x10<sup>-6</​sup> ​torr) do not proceed further until it has fallen below this value.
  
-6. Set the arc voltage to 150 V.+6. Set the arc voltage to ~190 V.
  
-7. Turn on the extraction supply, it should be set for 10-12 kV.� This will also turn on the exchange canal power supply, usually set at 13 to 16 kV.+7. Turn on the extraction supply, it should be set for 10-12 kV. This will also turn on the exchange canal power supply, usually set at 13 to 16 kV.
  
 8. Turn on the focus supply, it should be set for ~2 kV. 8. Turn on the focus supply, it should be set for ~2 kV.
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 9. If the exchange canal power supply did not come on with the extractor, check the toggle switch at the lower, right corner of the supply to make sure its on. 9. If the exchange canal power supply did not come on with the extractor, check the toggle switch at the lower, right corner of the supply to make sure its on.
  
-10. Increase the sodium heater current by ~0.05 A and the filament current by ~10 A every twenty minutes. Make sure the pressure does not rise over 1x10-5 torr, if it does, do not proceed further until it has fallen below this value.+10. Increase the sodium heater current by ~0.05 A and the filament current by ~10 A every twenty minutes. Make sure the pressure does not rise over 1x10<sup>-5</​sup> ​torr, if it does, do not proceed further until it has fallen below this value
 + 
 +11. Slowly turn up the Filament Current until the arc starts. ​ When the arc starts, 60 A for an old filament, 70 a for a new filament, observe the Arc Voltage and keep it at 150 V.
  
-11. When the arc starts, 70 A for a dirty source or old filament, 90 A for a new filament in a clean source, observe the arc voltage and keep it at 150 V. 
  
 12. Carry on increasing the filament current until the arc current reaches 2.5 A, keep the arc voltage at 150 V. 12. Carry on increasing the filament current until the arc current reaches 2.5 A, keep the arc voltage at 150 V.
  
-13. Increase the heater current in 0.05 A steps until it reaches 0.A.+13. Increase the heater current in 0.05 A steps until it reaches 0.57 A.
  
-14. Set inflection magnet to 0.8 amps and LEFT deflection.+14. Set inflection magnet to ~0.8 amps and LEFT deflection.
  
 15. Tune for beam in the LE cup by adjusting inflection magnet, source Einzel lens ( EINZEL LENS B), the low energy extension Einzel lens (EINZEL LENS A), and the 2Y, 2X steerers. It may take two hours before even one nanoamp of current is detectable, especially for freshly cleaned sodium canal 15. Tune for beam in the LE cup by adjusting inflection magnet, source Einzel lens ( EINZEL LENS B), the low energy extension Einzel lens (EINZEL LENS A), and the 2Y, 2X steerers. It may take two hours before even one nanoamp of current is detectable, especially for freshly cleaned sodium canal
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 17. Typical Settings: 17. Typical Settings:
           * Extraction :                12 kV @ < 1 mA           * Extraction :                12 kV @ < 1 mA
-          * Attachment              ​13 kV @ 1 mA+          * Exchange Canal            ​13 kV @ 1 mA
           * Focus: ​                      2 kV @ 1.5 mA           * Focus: ​                      2 kV @ 1.5 mA
-          * Magnet :                   ​0.2 ​A +          * Magnet :                   ​0.2 ​- 1.4A 
-          * Heater: ​                    0.67 +          * Heater: ​                    0.58 
-          * Arc voltage:         150 V+          * Arc Voltage:         150 V
           * Filament Current: ​    70 - 90 amps           * Filament Current: ​    70 - 90 amps
           * Arc Current: ​            2.5 amps           * Arc Current: ​            2.5 amps
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           * 2Y:                          5.00           * 2Y:                          5.00
           * 2X:                          5.00           * 2X:                          5.00
-          * Box Vacuum: ​    ​2.0x10E-6 ​ torr+          * Box Vacuum: ​    ​2.0x10E<sup>-6</​sup> ​ torr
  
 ** Starting from standby ** ** Starting from standby **
Line 173: Line 174:
 1. Typical Settings: 1. Typical Settings:
           * Extraction :                12 kV @ < 1 mA           * Extraction :                12 kV @ < 1 mA
-          * Attachment              ​13 kV @ 1 mA+          * Exchange Canal            ​13 kV @ 1 mA
           * Focus: ​                      2 kV @ 1.5 mA           * Focus: ​                      2 kV @ 1.5 mA
-          * Magnet :                   ​0.2 ​A +          * Magnet :                   ​0.2 ​- 1.4A 
-          * Sodium ​Heater: ​        ​0.55 A+          * Heater: ​                    ​0.55 A
           * Arc Voltage: ​        150 V           * Arc Voltage: ​        150 V
           * Filament Current: ​    70 - 90 amps           * Filament Current: ​    70 - 90 amps
-          * Arc Current: ​            0.75 amps+          * Arc Current: ​            2.amps
           * Source lens:             2 kV           * Source lens:             2 kV
           * Lens A:                    <5 kV           * Lens A:                    <5 kV
Line 185: Line 186:
           * 2Y:                          5.00           * 2Y:                          5.00
           * 2X:                          5.00           * 2X:                          5.00
-          *Box Vacuum: ​    ​2.0x10E-6 ​ torr+          * Box Vacuum: ​    ​2.0x10E<sup>-6</​sup> ​ torr
  
  
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 At the Control Console: At the Control Console:
  
-1. Check the source vacuum is less than 5x10-6 torr.+1. Check the source vacuum is less than 5x10<sup>-6</​sup> ​torr.
  
 In the Vault: In the Vault:
  
-1. Check the vacuum in the low energy extension is less than 5x10-6 torr and the source gate valve is open.+1. Check the vacuum in the low energy extension is less than 5x10<sup>-6</​sup> ​torr and the source gate valve is open.
  
 On the way back to the control room: On the way back to the control room:
Line 205: Line 206:
 1. Increase the filament current until the arc current reaches 2.5 A, keep the Arc Voltage at 150 V. 1. Increase the filament current until the arc current reaches 2.5 A, keep the Arc Voltage at 150 V.
  
-2. Increase the sodium heater current ​ until it reaches 0.65 A, or whatever was used the last time the source was run – check the log.+2. Increase the sodium heater current ​ until it reaches ​up to 0.A, **or whatever was used the last time** the source was run – check the log.
  
 3. Set the inflection magnet to 0.8 amps and LEFT deflection. 3. Set the inflection magnet to 0.8 amps and LEFT deflection.
Line 217: Line 218:
 5. Typical Settings: 5. Typical Settings:
           * Extraction :                12 kV @ < 1 mA           * Extraction :                12 kV @ < 1 mA
-          * Attachment              ​13 kV @ 1 mA+          * Exchange Canal            ​13 kV @ 1 mA
           * Focus: ​                      2 kV @ 1.5 mA           * Focus: ​                      2 kV @ 1.5 mA
-          * Magnet :                   0.7 A +          * Magnet :                   0.2 - 1.4A 
-          * Heater: ​                    0.67 +          * Heater: ​                    0.58 
-          * Arc voltage:         150 V+          * Arc Voltage:         150 V
           * Filament Current: ​    70 - 90 amps           * Filament Current: ​    70 - 90 amps
           * Arc Current: ​            2.5 amps           * Arc Current: ​            2.5 amps
Line 229: Line 230:
           * 2Y:                          5.00           * 2Y:                          5.00
           * 2X:                          5.00           * 2X:                          5.00
-          *Box Vacuum: ​    ​2.0x10E-6 ​ torr+          * Box Vacuum: ​    ​2.0x10E<sup>-6</​sup> ​ torr
  
 ** Duoplasmatron Warm Shutdown Procedure ** ** Duoplasmatron Warm Shutdown Procedure **
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 4. Turn off the deflection supplies and run lenses down to zero. 4. Turn off the deflection supplies and run lenses down to zero.
  
-5. Turn down the source gas until the pressure on the source tc gauge is ~10 microns. ​Stop pressing the button when the pressure is 100 microns to allow the tc gauge to catch up. The pressure response is delayed. Do not over-drive the source gas control as it could damage the leak valve.+5. Turn down the source gas until the pressure on the source tc gauge is ~10 microns. ​ The pressure response is delayed, be patient. Do not over-drive the source gas control as it could damage the leak valve.
  
 ** Duoplasmatron Shut Down Completely ** ** Duoplasmatron Shut Down Completely **
Line 260: Line 261:
 5. Turn off the deflection supplies and run lenses down to zero. 5. Turn off the deflection supplies and run lenses down to zero.
  
-6. Turn down the source gas until the pressure on the source tc gauge is ~10 microns.� Stop pressing the button when the pressure is 100 microns to allow the tc gauge to catch up. The pressure response is delayed.� Do not over-drive the source gas control as it could damage the leak valve.+6. Turn down the source gas until the pressure on the source tc gauge is ~10 microns. The pressure response is delayed, be patient. Do not over-drive the source gas control as it could damage the leak valve.
  
 7. After 10 minutes to allow cooling water to circulate, turn control power key off on source control panel. 7. After 10 minutes to allow cooling water to circulate, turn control power key off on source control panel.
Line 280: Line 281:
 ** 3He operation ** ** 3He operation **
  
-This assumes the source is running on 4He already and that the regulator on the 4He bottle is set for no more than 5 psig.+This assumes the source is running on <​sup>​4</​sup>​He ​already and that the regulator on the <​sup>​4</​sup>​He ​bottle is set for no more than 5 psig.
  
-Turn down the source gas until the pressure on the source tc gauge is ~10 microns.� Stop pressing the button when the pressure is 100 microns ​to allow the tc gauge to catch up.� The pressure response is delayed.� Do not over-drive the source gas control as it could damage the leak valve.+Turn the Filament Current and Arc Voltage ​to zero
  
-Go out to the vault and make sure a 3He bottle ​is ready for useIt MUST have its main valve closed at this point.+Turn down the source gas until the pressure on the source tc gauge is ~10 micronsThe pressure response is delayed, be patient. Do not over-drive the source gas control as it could damage the leak valve.
  
-Shut off the manifold valve near the floor that is connected to the 4He.+Go out to the vault and make sure a <​sup>​3</​sup>​He bottle is ready for use. It MUST have its main valve closed at this point. 
 + 
 +Shut off the manifold valve near the floor that is connected to the <​sup>​4</​sup>​He.
  
 Start the roughing pump that is attached to the manifold and open the manifold valve leading to the pump. Start the roughing pump that is attached to the manifold and open the manifold valve leading to the pump.
  
-Open the manifold valve to the 3He regulator, also open the valve on the regulator output.+Open the manifold valve to the <​sup>​3</​sup>​He ​regulator, also open the valve on the regulator output.
  
 Rough for a minute until the TC gauge on the pump is about 10 microns. Rough for a minute until the TC gauge on the pump is about 10 microns.
Line 296: Line 299:
 Close the manifold valve to the rough pump and turn off the pump. Close the manifold valve to the rough pump and turn off the pump.
  
-Open the 3He bottle main valve, regulator should go to ~ 5 psig.� Record the bottle pressure on the tag.+Open the 3He bottle main valve, regulator should go to ~ 5 psig. Record the bottle pressure on the tag.
  
-At the control console, turn up the source gas until the pressure on the source tc gauge is ~150 microns.� Flip the tag on the panel around to show 3He.+At the control console, turn up the source gas until the pressure on the source tc gauge is ~300 microns. Flip the tag on the panel around to show 3He.
  
 Reverse this procedure to return to 4He operation, except don’t rough beyond the 4He manifold valve (don’t rough line and regulator) when you have finished using 3He. Reverse this procedure to return to 4He operation, except don’t rough beyond the 4He manifold valve (don’t rough line and regulator) when you have finished using 3He.
Line 329: Line 332:
 Telephone: (740)593-0933 Telephone: (740)593-0933
 E-Mail: MASSEY@OHIOU.EDU E-Mail: MASSEY@OHIOU.EDU
-Last modified on 06/20/06 +Last modified on 3/16/2012 TNM
playground/alpha.txt · Last modified: 2012/11/27 08:57 by jacobs