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hv_bias [2014/11/19 11:59] pereira [HV Manual control] |
hv_bias [2023/10/17 09:40] (current) 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?700|GUI control | + | The high-voltage of the plastic scintillator and the MCP at Object, the [[Detectors# |
+ | |||
+ | {{:wiki:phoebus_diag_hv.png|CS-Studio Phoebus DIAG HV control}} | ||
+ | |||
+ | This “S800 HV Bias Power Supply” page is linked from both " | ||
+ | |||
+ | {{: | ||
+ | |||
+ | 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. | ||
- | ===== 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 {{:wiki: | + | Other examples of HV values used with different fragment beams are: |
- | In order for the CRDCs to work, it is necessary to bias their electrostatic gate. This is done via the H.V. Tennelec power supply located on the left side of the object-scintillator | + | * **CRDC1 and CRDC2**: |
- | + | * For He-3 @ ~130 MeV/u: CRDC1 (Anode=1120 V, Drift=1000 | |
+ | * For Be-12 @ ~30 MeV/u: CRDC1 (Anode=970 V, Drift=1000 V); CRDC2 (Anode=970 V; Drift=1000 V) | ||
+ | * For Ar-34 @ ~80 MeV/u: CRDC1 (Anode=860 V, Drift=1000 V); CRDC2 (Anode=840 V; Drift=1000 V) | ||
+ | * For Zn-58 @ ~44 MeV/u: CRDC1 (Anode=740 V, Drift=1000 V); CRDC2 (Anode=740 V; Drift=1000 V) | ||
+ | * For Rb-74 @ ~40 MeV/u: CRDC1 (Anode=650 V, Drift=1000 V); CRDC2 (Anode=650 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)**: | ||
+ | * 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 Ar-34 @ ~80 MeV/u: UP (1580 V); DOWN (1510 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) | ||
- | {{:wiki: | + | * **IC**: |
+ | * Typically 200 V | ||