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playground:change [2012/02/06 20:16] 50.41.34.104 |
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5. To go to a lower energy move the CORONA PROBE POSITION "IN" while lowering the CHARGING VOLTAGE. **__NEVER__** allow the GRID VOLTAGE to go more negative than -10 VDC during this operation. | 5. To go to a lower energy move the CORONA PROBE POSITION "IN" while lowering the CHARGING VOLTAGE. **__NEVER__** allow the GRID VOLTAGE to go more negative than -10 VDC during this operation. | ||
- | 6. Switch POWER SUPPLIES to OFF. | + | 6. Set the TERMINAL VOLTAGE Dial to the desired value. The dial is 2 turns per MV (set the dial to twice the GVM you want). You may have to add some upcharge after setting the dial. |
- | 7. Turn the TERMINAL VOLTAGE dial to zero. | + | 7. Raise the CONTROL GAIN to 2-3 for low current beams, around 5 for high current beams. The system is now controlling in GVM mode. |
+ | 8. Make fine adjustments to the TERMINAL VOLTAGE Dial to reach exactly the desired GVM value. | ||
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+ | 9. | ||