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playground:alpha
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playground:alpha [2010/07/30 10:32] 132.235.40.102 |
playground:alpha [2010/07/30 10:52] 132.235.40.102 |
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| 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 0.6 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 0.6 A, **or whatever was used the last time** the source was run – check the log. |
| 10. Set the inflection magnet to about 0.8 amps and LEFT deflection. | 10. Set the inflection magnet to about 0.8 amps and LEFT deflection. | ||
| Line 77: | Line 77: | ||
| * Focus: 2 kV @ 1.5 mA | * Focus: 2 kV @ 1.5 mA | ||
| * Magnet : 0.2 - 1.4A | * Magnet : 0.2 - 1.4A | ||
| - | * Heater: 0.65 A | + | * Heater: 0.58 A |
| * Arc Voltage: 150 V | * Arc Voltage: 150 V | ||
| * Filament Current: 70 - 90 amps | * Filament Current: 70 - 90 amps | ||
| Line 86: | Line 86: | ||
| * 2Y: 5.00 | * 2Y: 5.00 | ||
| * 2X: 5.00 | * 2X: 5.00 | ||
| - | + | * Box Vacuum: 2.0x10E<sup>-6</sup> torr | |
| - | Box Vacuum: 2.0x10E<sup>-6</sup> torr | + | |
| ** Starting from cold ** | ** Starting from cold ** | ||
| Line 139: | Line 138: | ||
| 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 0.6 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. | ||
| Line 153: | Line 152: | ||
| 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 A | + | * Heater: 0.58 A |
| - | * 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 173: | Line 172: | ||
| 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: 2.5 amps |
| * Source lens: 2 kV | * Source lens: 2 kV | ||
| * Lens A: <5 kV | * Lens A: <5 kV | ||
| Line 185: | Line 184: | ||
| * 2Y: 5.00 | * 2Y: 5.00 | ||
| * 2X: 5.00 | * 2X: 5.00 | ||
| - | *Box Vacuum: 2.0x10E<sup>-6</sup> torr | + | * Box Vacuum: 2.0x10E<sup>-6</sup> torr |
| Line 205: | Line 204: | ||
| 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 0.6 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 216: | ||
| 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 A | + | * Heater: 0.58 A |
| - | * 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 228: | ||
| * 2Y: 5.00 | * 2Y: 5.00 | ||
| * 2X: 5.00 | * 2X: 5.00 | ||
| - | *Box Vacuum: 2.0x10E<sup>-6</sup> torr | + | * Box Vacuum: 2.0x10E<sup>-6</sup> torr |
| ** Duoplasmatron Warm Shutdown Procedure ** | ** Duoplasmatron Warm Shutdown Procedure ** | ||
| Line 243: | Line 242: | ||
| 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 259: | ||
| 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 282: | Line 281: | ||
| 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. | 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 |
| + | |||
| + | 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. | ||
| 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. | 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. | ||
| Line 296: | Line 297: | ||
| 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 330: | ||
| 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 7/30/2010 DKJ |
playground/alpha.txt · Last modified: 2012/11/27 08:57 by jacobs
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