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playground:alpha
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| Both sides previous 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 15:46] 132.235.40.102 |
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| 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: | ||
playground/alpha.txt · Last modified: 2012/11/27 08:57 by jacobs
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