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playground:startup
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playground:startup [2023/08/08 07:34] carter |
playground:startup [2023/08/08 10:41] carter |
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| ====== Accelerator Start-up ====== | ====== Accelerator Start-up ====== | ||
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| + | ** Clear all Areas ** | ||
| 1. **Verify Initial Machine Voltage setup:** | 1. **Verify Initial Machine Voltage setup:** | ||
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| * POWER: Red Light On | * POWER: Red Light On | ||
| * CABLE: Green Light On | * CABLE: Green Light On | ||
| - | |||
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| **2. Corona Probe Adjustment** | **2. Corona Probe Adjustment** | ||
| - | After reaching the approximate desired terminal voltage with no corona current present, begin moving the corona points in. Maintain the desired approximate terminal voltage by increasing the UPCHARGE and iteratively move the corona points in while restoring the terminal voltage with the UPCHARGE. The CORONA PROBE CURRENT will rise until it reaches the value set by the BIAS CURRENT. After that, the GRID VOLTAGE will change to keep the CORONA PROBE CURRENT at the set value. The goal is to balance the UPCHARGE and CORONA PROBE POSITION so that you have the desired TERMINAL VOLTAGE and **-5** VDC on the GRID VOLTAGE (The GRID VOLTAGE may never reach -5 VDC when running at ultra low Terminal energy, E < 0.300 MV, do the best you can). Do (a) or (b) as needed: | + | After reaching the approximate desired terminal voltage with no corona current present, begin moving the corona points in (set corona current/position to current). Maintain the desired approximate terminal voltage by increasing the UPCHARGE and iteratively move the corona points in while restoring the terminal voltage with the UPCHARGE. The CORONA PROBE CURRENT will rise until it reaches the value set by the BIAS CURRENT. After that, the GRID VOLTAGE will change to keep the CORONA PROBE CURRENT at the set value. The goal is to balance the UPCHARGE and CORONA PROBE POSITION so that you have the desired TERMINAL VOLTAGE and **-5** VDC on the GRID VOLTAGE (The GRID VOLTAGE may never reach -5 VDC when running at ultra low Terminal energy, E < 0.300 MV, do the best you can). Do (a) or (b) as needed: |
| a. Move the CORONA PROBE POSITION “IN” to make the GRID VOLTAGE more negative. This may require you to adjust the UPCHARGE to maintain TERMINAL VOLTAGE. | a. Move the CORONA PROBE POSITION “IN” to make the GRID VOLTAGE more negative. This may require you to adjust the UPCHARGE to maintain TERMINAL VOLTAGE. | ||
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| d. Switch OVERVOLTAGE PROTECTION to ENABLE. | d. Switch OVERVOLTAGE PROTECTION to ENABLE. | ||
| + | |||
| + | e. Do accelerator header and collect the NMR frequency and analyzer magnet current values. | ||
| **4. Beam Transport** | **4. Beam Transport** | ||
playground/startup.txt · Last modified: 2024/04/05 04:25 by carter
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