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playground:alpha [2010/07/16 15:46] 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 199: | Line 199: | ||
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 225: | 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 233: | 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 244: | 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 260: | 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 ** |