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hv_bias [2015/04/12 13:38] pereira [HV Remote control] |
hv_bias [2023/10/16 08:30] noji |
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====== Detector bias control ====== | ====== Detector bias control ====== | ||
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===== HV Remote control ===== | ===== HV Remote control ===== | ||
- | The high-voltage of the [[Detectors# | ||
- | {{:wiki:hv-gui.png? | + | The high-voltage |
+ | {{: | ||
+ | |||
+ | This page can be reached from “FRIB EXP” → “DIAG” (Engineering Area, not to be confused with “S800” → “Diag Main”) → “S800 HV Bias Power Supply”. | ||
+ | |||
+ | The ramp rate can be changed in the " | ||
+ | |||
+ | Each channel can also be accessed from by going to “FRIB EXP” -> “Power Supplies” and open the “EXP-S3” tab, which looks like the screenshot below. | ||
+ | |||
+ | {{: | ||
+ | |||
+ | The actual HV modules are located on the top level of the S3 vault, under the FP chamber. | ||
+ | |||
+ | {{: | ||
Other examples of HV values used with different fragment beams are: | Other examples of HV values used with different fragment beams are: | ||
- | * CRDC1 and CRDC2: | + | * **CRDC1 and CRDC2**: |
* For He-3 @ ~130 MeV/u: CRDC1 (Anode=1120 V, Drift=1000 V); CRDC2 (Anode=1120 V; Drift=1000 V) | * For He-3 @ ~130 MeV/u: CRDC1 (Anode=1120 V, Drift=1000 V); CRDC2 (Anode=1120 V; Drift=1000 V) | ||
* For Be-12 @ ~30 MeV/u: CRDC1 (Anode=970 V, Drift=1000 V); CRDC2 (Anode=970 V; Drift=1000 V) | * For Be-12 @ ~30 MeV/u: CRDC1 (Anode=970 V, Drift=1000 V); CRDC2 (Anode=970 V; Drift=1000 V) | ||
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* For U-238 (88+) @ ~70 MeV/u: CRDC1 (Anode=570 V, Drift=1000 V); CRDC2 (Anode=570 V; Drift=1000 V) | * For U-238 (88+) @ ~70 MeV/u: CRDC1 (Anode=570 V, Drift=1000 V); CRDC2 (Anode=570 V; Drift=1000 V) | ||
| | ||
- | * FP scintillator (E1 up and E1 down): | + | * **FP scintillator (E1 up and E1 down)**: |
* For He-3 @ ~130 MeV/u: UP (1790 V); DOWN (1760 V) | * For He-3 @ ~130 MeV/u: UP (1790 V); DOWN (1760 V) | ||
* For Be-12 @ ~30 MeV/u: UP (1770 V); DOWN (1700 V) | * For Be-12 @ ~30 MeV/u: UP (1770 V); DOWN (1700 V) | ||
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* For Zn-58 @ ~44 MeV/u: UP (1400 V); DOWN (1340 V) | * For Zn-58 @ ~44 MeV/u: UP (1400 V); DOWN (1340 V) | ||
* For U-238 (88+) @ ~70 MeV/u: UP (1180 V); DOWN (1280 V) | * For U-238 (88+) @ ~70 MeV/u: UP (1180 V); DOWN (1280 V) | ||
- | ===== HV Manual control ==== | ||
- | Apart from the detectors listed above, the voltages of the [[Detectors# | ||
- | and the **electrostatic gate** of the [[Detectors# | ||
- | |||
- | The bias for the object scintillator is controlled via the H.V. power supply {{: | ||
- | |||
- | In order for the [[Detectors# | ||
- | |||
- | {{:wiki: | + | * **IC**: |
+ | * Typically 200 V | ||