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playground:shutdown
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playground:shutdown [2009/04/15 15:30] odonnell Change to wiki numbering format; added line about not letting the corona points go negative. |
playground:shutdown [2017/04/17 11:45] (current) jacobs |
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| - | ==== Machine Shutdown ==== | + | ==== Accelerator Shutdown ==== |
| - | ** Machine Shutdown ** | + | 1. Switch OVERVOLTAGE PROTECTION to DISABLE. |
| - | - Log Machine settings, log radiation monitor tape if necessary. | + | 2. Switch the control mode to GVM. |
| - | - Switch stabilizer to "AUTO" | + | |
| - | - Put cup in -- when putting in L.E. cup at high terminal voltage be prepared to run belt charge down as terminal voltage will increase when the beam loading is removed. | + | 3. 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 the CONTROL GAIN to zero. |
| - | - Switch stabilizer to "STANDBY". | + | |
| - | - Turn "GRIDDED VOLTAGE TUBE LENS" down. | + | 4. Turn the CHARGING VOLTAGE dial down to 0.10 |
| - | - Monitor corona current while changing belt charge; do not run in (extend) the corona points when the terminal charge may become negative (i.e. with the plastic belt). Reverse current will damage the stabilizer circuit. | + | |
| - | - Run belt charge down. | + | 5. Switch CHAIN MOTORS to OFF. |
| - | - Turn belt charge "OFF". | + | |
| - | - Turn drive motor "OFF". | + | 6. Switch POWER SUPPLIES to OFF. |
| - | - Start Source shut down (all control room operations). | + | |
| - | - Set steerers to zero and then to "OFF". | + | 7. Turn the TERMINAL VOLTAGE dial to zero. |
| - | - Run magnets and quadrupole lenses down (coarse to zero, fine to 500), then turn off (push the "power" button). | + | |
| - | - Turn the beam profile monitor (BPM) to "OFF" | + | |
| - | - Turn buncher and chopper power to "OFF". | + | |
| - | - Complete control room source shutdown and run low energy extension einzel lenses down. | + | |
| - | - //(Only for maintenance shutdown)// Switch stabilizer to "OFF". | + | |
| - | - //(Only for maintenance shutdown)// Turn key switch "OFF". | + | |
| - | - Complete source shut down in vault. | + | |
playground/shutdown.1239823803.txt.gz · Last modified: 2009/04/15 15:30 by odonnell
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