playground:change
Differences
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| playground:change [2012/02/06 20:16] – 50.41.34.104 | playground:change [2026/06/25 16:12] (current) – external edit 127.0.0.1 | ||
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| ==== Changing Terminal Energy ==== | ==== Changing Terminal Energy ==== | ||
| - | 1. Switch OVERVOLTAGE PROTECTION to DISABLE. | + | - Put the Faraday cups in. |
| - | + | - Switch OVERVOLTAGE PROTECTION to DISABLE. | |
| - | 2. Switch the control mode to GVM. | + | |
| - | + | - Slowly turn the CONTROL GAIN to zero while watching the grid voltage. If the grid voltage rises above -5 volts, reduce the CHARGING VOLTAGE to keep the grid voltage less than -5 volts, then continue reducing | |
| - | 3. Turn the CONTROL GAIN to zero. | + | |
| - | + | | |
| - | 4. To go to a higher energy move the CORONA PROBE POSITION " | + | - 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. |
| - | + | - 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. | |
| - | 5. To go to a lower energy move the CORONA PROBE POSITION " | + | - Make fine adjustments to the TERMINAL VOLTAGE |
| - | + | - Switch OVERVOLTAGE PROTECTION to ENABLE. | |
| - | 6. Switch POWER SUPPLIES | + | |
| - | + | ||
| - | 7. Turn the TERMINAL VOLTAGE | + | |
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