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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 15:00] 132.235.40.102 |
playground:alpha [2010/07/16 15:09] 132.235.40.102 |
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| 1. Turn source magnet up to ~0.2 A. (likely already set) | 1. Turn source magnet up to ~0.2 A. (likely already set) | ||
| - | + | ||
| 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 ~150 microns. | ||
| - | + | ||
| 3. Set the Arc Voltage to 150 V. | 3. Set the Arc Voltage to 150 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, and the filament current up slowly, over 30 seconds, until the arc starts. | ||
| - | + | ||
| 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. 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. | ||
| - | + | ||
| 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 0.65 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 0.8 amps and LEFT deflection. | ||
| - | | + | |
| 11. To obtain the maximum current adjust the following: | 11. To obtain the maximum current adjust the following: | ||
| * Focus | * Focus | ||
| Line 71: | Line 71: | ||
| * Einzel lenses A and B | * Einzel lenses A and B | ||
| * X and Y steerers | * X and Y steerers | ||
| - | | + | |
| 12. Typical Settings: | 12. Typical Settings: | ||
| * Extraction : 12 kV @ < 1 mA | * Extraction : 12 kV @ < 1 mA | ||
| - | * Attachment: 13 kV @ 1 mA | + | * Attachment: 13 kV @ 1 mA |
| * Focus: 2 kV @ 1.5 mA | * Focus: 2 kV @ 1.5 mA | ||
| * Magnet : 0.2 A | * Magnet : 0.2 A | ||
| Line 86: | Line 86: | ||
| * 2Y: 5.00 | * 2Y: 5.00 | ||
| * 2X: 5.00 | * 2X: 5.00 | ||
| - | |||
| Box Vacuum: 2.0x10E-6 torr | Box Vacuum: 2.0x10E-6 torr | ||
playground/alpha.txt · Last modified: 2012/11/27 08:57 by jacobs
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