playground:alpha
Differences
This shows you the differences between two versions of the page.
| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| playground:alpha [2010/07/16 20:30] – 184.57.89.126 | playground:alpha [2026/06/25 16:12] (current) – external edit 127.0.0.1 | ||
|---|---|---|---|
| Line 3: | Line 3: | ||
| ** Duoplasmatron Instructions ** | ** Duoplasmatron Instructions ** | ||
| - | Please study the diagram. | + | **Please study the diagram |
| - | {{playground: | + | |
| + | {{playground: | ||
| Line 46: | Line 47: | ||
| Back at the Control Console: | Back at the Control Console: | ||
| - | 1. Turn source magnet up to ~0.2 A. (likely already set, and it can be as high as 1 A) | + | 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 between | + | 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 < |
| - | 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, | + | 7. Slowly turn up the Filament Current to 40-50 A and wait 5 minutes. |
| 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 | + | 9. Increase the sodium heater current |
| - | 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: | ||
| Line 74: | Line 75: | ||
| 12. Typical Settings: | 12. Typical Settings: | ||
| * Extraction : 12 kV @ < 1 mA | * Extraction : 12 kV @ < 1 mA | ||
| - | * Attachment: | + | * Exchange Canal: |
| * Focus: | * Focus: | ||
| - | * Magnet : | + | * Magnet : |
| - | * Heater: | + | * Heater: |
| * Arc Voltage: | * Arc Voltage: | ||
| * Filament Current: | * Filament Current: | ||
| Line 86: | Line 87: | ||
| * 2Y: 5.00 | * 2Y: 5.00 | ||
| * 2X: 5.00 | * 2X: 5.00 | ||
| - | + | * Box Vacuum: | |
| - | Box Vacuum: | + | |
| ** Starting from cold ** | ** Starting from cold ** | ||
| Line 119: | Line 119: | ||
| 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< | 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< | ||
| - | 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. 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< | ||
| - | 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. | ||
| Line 135: | Line 135: | ||
| 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< | 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< | ||
| - | 11. When the arc starts, | + | 11. Slowly turn up the Filament Current until the arc starts. |
| 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. |
| 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 | ||
| Line 153: | Line 154: | ||
| 17. Typical Settings: | 17. Typical Settings: | ||
| * Extraction : 12 kV @ < 1 mA | * Extraction : 12 kV @ < 1 mA | ||
| - | * Attachment: | + | * Exchange Canal: |
| * Focus: | * Focus: | ||
| - | * Magnet : | + | * Magnet : |
| - | * Heater: | + | * Heater: |
| - | * Arc voltage: 150 V | + | * Arc Voltage: 150 V |
| * Filament Current: | * Filament Current: | ||
| * Arc Current: | * Arc Current: | ||
| Line 173: | Line 174: | ||
| 1. Typical Settings: | 1. Typical Settings: | ||
| * Extraction : 12 kV @ < 1 mA | * Extraction : 12 kV @ < 1 mA | ||
| - | * Attachment: | + | * Exchange Canal: |
| * Focus: | * Focus: | ||
| - | * Magnet : | + | * Magnet : |
| - | * Sodium | + | * Heater: |
| * Arc Voltage: | * Arc Voltage: | ||
| * Filament Current: | * Filament Current: | ||
| - | * Arc Current: | + | * Arc Current: |
| * 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: | + | * Box Vacuum: |
| 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 | + | 2. Increase the sodium heater current |
| 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: | + | * Exchange Canal: |
| * Focus: | * Focus: | ||
| - | * Magnet : 0.7 A | + | * Magnet : 0.2 - 1.4A |
| - | * Heater: | + | * Heater: |
| - | * Arc voltage: 150 V | + | * Arc Voltage: 150 V |
| * Filament Current: | * Filament Current: | ||
| * Arc Current: | * Arc Current: | ||
| Line 229: | Line 230: | ||
| * 2Y: 5.00 | * 2Y: 5.00 | ||
| * 2X: 5.00 | * 2X: 5.00 | ||
| - | *Box Vacuum: | + | * Box Vacuum: |
| ** Duoplasmatron Warm Shutdown Procedure ** | ** Duoplasmatron Warm Shutdown Procedure ** | ||
| Line 243: | Line 244: | ||
| 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. | + | 5. If the source will be used again within 24 hours leave the gas set at 300 microns. |
| ** 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 282: | Line 283: | ||
| This assumes the source is running on < | This assumes the source is running on < | ||
| - | 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.� | + | 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 < | Go out to the vault and make sure a < | ||
| 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.1279326620.txt.gz · Last modified: (external edit)