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hv_bias [2014/11/19 11:55] pereira |
hv_bias [2023/10/17 09:40] (current) noji |
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====== Detector bias control ====== | ====== Detector bias control ====== | ||
- | |||
===== 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. | ||
+ | {{: | ||
- | ===== HV Manual control ==== | + | The actual |
- | Apart from the detectors listed above, the voltages | + | |
- | The bias for the object scintillator is controlled via the H.V. power supply | + | {{:wiki:img_1369.png|}} |
- | 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 Canberra power supply (see figure below). | + | Other examples |
- | + | ||
+ | * **CRDC1 and CRDC2**: | ||
+ | * 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 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 | ||