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playground:alpha
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| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
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playground:alpha [2010/07/16 15:41] 132.235.40.102 |
playground:alpha [2010/07/16 20:21] 184.57.89.126 |
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| Line 32: | Line 32: | ||
| 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: | ||
| Line 46: | Line 46: | ||
| 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 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 between 300 and 500 microns (sometimes higher pressures are needed to start the source). |
| 3. Set the Arc Voltage to 150 V. | 3. Set the Arc Voltage to 150 V. | ||
| Line 138: | 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. | + | |
| - | 14. Set inflection magnet to 0.8 amps and LEFT deflection. | + | 13. Increase the heater current in 0.05 A steps until it reaches 0.6 A. |
| - | 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 | + | |
| - | 16. To obtain the maximum current adjust the following: | + | 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 | ||
| + | |||
| + | 16. To obtain the maximum current adjust the following: | ||
| * Focus | * Focus | ||
| * Inflection Magnet | * Inflection Magnet | ||
| * Einzel lenses A and B | * Einzel lenses A and B | ||
| * X and Y steerers | * X and Y steerers | ||
| - | 17. Typical Settings: | + | |
| + | 17. Typical Settings: | ||
| * Extraction : 12 kV @ < 1 mA | * Extraction : 12 kV @ < 1 mA | ||
| * Attachment: 13 kV @ 1 mA | * Attachment: 13 kV @ 1 mA | ||
| Line 166: | Line 171: | ||
| This applies when the source has been running but is not being used but is expected to be used within a few hours: | This applies when the source has been running but is not being used but is expected to be used within a few hours: | ||
| - | 1. Typical Settings: | + | 1. Typical Settings: |
| * Extraction : 12 kV @ < 1 mA | * Extraction : 12 kV @ < 1 mA | ||
| * Attachment: 13 kV @ 1 mA | * Attachment: 13 kV @ 1 mA | ||
| Line 180: | Line 185: | ||
| * 2Y: 5.00 | * 2Y: 5.00 | ||
| * 2X: 5.00 | * 2X: 5.00 | ||
| - | + | *Box Vacuum: 2.0x10E-6 torr | |
| - | + | ||
| - | Box Vacuum: 2.0x10E-6 torr | + | |
| Line 188: | Line 191: | ||
| 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 5x10-6 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 5x10-6 torr and the source gate valve is open. |
| On the way back to the control room: | On the way back to the control room: | ||
| - | 3. Adjust buncher tubes, slit settings, and open HE and LE gate valves. | + | 3. Adjust buncher tubes, slit settings, and open HE and LE gate valves. |
| Back at the Control Console: | Back at the Control Console: | ||
| - | 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. | + | |
| - | 3. Set the inflection magnet to 0.8 amps and LEFT deflection. | + | 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. |
| - | 4. To obtain the maximum current adjust the following: | + | |
| + | 3. Set the inflection magnet to 0.8 amps and LEFT deflection. | ||
| + | |||
| + | 4. To obtain the maximum current adjust the following: | ||
| * Focus | * Focus | ||
| * Inflection Magnet | * Inflection Magnet | ||
| * Einzel lenses A and B | * Einzel lenses A and B | ||
| * X and Y steerers | * X and Y steerers | ||
| - | 5. Typical Settings: | + | |
| + | 5. Typical Settings: | ||
| * Extraction : 12 kV @ < 1 mA | * Extraction : 12 kV @ < 1 mA | ||
| * Attachment: 13 kV @ 1 mA | * Attachment: 13 kV @ 1 mA | ||
| Line 222: | Line 229: | ||
| * 2Y: 5.00 | * 2Y: 5.00 | ||
| * 2X: 5.00 | * 2X: 5.00 | ||
| - | + | *Box Vacuum: 2.0x10E-6 torr | |
| - | + | ||
| - | Box Vacuum: 2.0x10E-6 torr | + | |
| ** Duoplasmatron Warm Shutdown Procedure ** | ** Duoplasmatron Warm Shutdown Procedure ** | ||
| Line 230: | Line 235: | ||
| This is the standard configuration when finished with the source for an extended amount of time. | This is the standard configuration when finished with the source for an extended amount of time. | ||
| - | 1. Turn the sodium heater current down to ~0.3 A. | + | 1. Turn the sodium heater current down to ~0.3 A. |
| - | 2. Slowly, over 30 seconds, turn down the filament current and the Arc Voltage to zero. | + | |
| - | 3. Turn off the extraction supply, the focus supply, and the sodium canal supply (should go off with extractor). | + | 2. Slowly, over 30 seconds, turn down the filament current and the Arc Voltage 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. | + | 3. Turn off the extraction supply, the focus supply, and the sodium canal supply (should go off with extractor). |
| + | |||
| + | 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. | ||
| ** Duoplasmatron Shut Down Completely ** | ** Duoplasmatron Shut Down Completely ** | ||
| Line 241: | Line 250: | ||
| At the control console: | At the control console: | ||
| - | 1. Put in the LE cup. | + | 1. Put in the LE cup. |
| - | 2. Turn Sodium heater down to zero and switch off. | + | |
| - | 3. Slowly, over 30 seconds, turn down the filament current and the Arc voltage to zero. | + | 2. Turn Sodium heater down to zero and switch off. |
| - | 4. Turn off the extraction supply, the focus supply, and the sodium canal supply (should go off with extractor).� Turn down magnet to zero. | + | |
| - | 5. Turn off the deflection supplies and run lenses down to zero. | + | 3. Slowly, over 30 seconds, turn down the filament current and the Arc voltage 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. | + | |
| - | 7. After 10 minutes to allow cooling water to circulate, turn control power key off on source control panel. | + | 4. Turn off the extraction supply, the focus supply, and the sodium canal supply (should go off with extractor). Turn down magnet 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. | ||
| + | |||
| + | 7. After 10 minutes to allow cooling water to circulate, turn control power key off on source control panel. | ||
| In the vault: | In the vault: | ||
| - | 1. Close "TUBE" gate valve | + | 1. Close "TUBE" gate valve |
| ** Duoplasmatron Standby Settings ** | ** Duoplasmatron Standby Settings ** | ||
| Line 257: | Line 272: | ||
| Use this configuration if the source will be used again in the next few hours. | Use this configuration if the source will be used again in the next few hours. | ||
| - | 1. Turn the heater to 0.55 ampere. | + | 1. Turn the heater to 0.55 ampere. |
| - | 2. All High Voltage are left ON. | + | |
| - | 3. Arc current reduced to ~1 A by reducing filament current and Arc Voltage. | + | 2. All High Voltage are left ON. |
| + | |||
| + | 3. Arc current reduced to ~1 A by reducing filament current and Arc Voltage. | ||
| ** 3He operation ** | ** 3He operation ** | ||
playground/alpha.txt · Last modified: 2012/11/27 08:57 by jacobs
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