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hv_bias [2013/12/14 10:39] pereira created |
hv_bias [2023/10/12 09:10] noji Updated after the migration from DAQ to EXP network |
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====== Detector bias control ====== | ====== Detector bias control ====== | ||
+ | ===== HV Remote control ===== | ||
- | ===== General Information ===== | + | The high-voltage of the plastic scintillator and the MCP at Object, the [[Detectors# |
- | The TPPACs, the Ion Chamber, and the CRDCs have ISEG power supplies run through a single VME-based bias control. The computer interface for this bias control, the S800 Detector HV Control, is typically run on the devop1 computer in Data-U6 and is started by clicking on S800 HV under the Operations option on the taskbar. The Object | + | |
- | ===== Object Scintillator ===== | + | {{: |
- | The bias for the object scintillator is controlled via the Canberra HV supply located in the left rack in Data-U6 in the NIM bin just underneath the NMR scopes. | + | |
- | ===== FP Scintillators ===== | + | This page can be reached |
- | Only the fist two scintillators are typically used since in most cases particles do not reach beyond the second detector. The biases for the anode and the drift electrode are each controlled separately via the S800 Detector HV Control. To protect the scintillator PMT bases from damage from discharge under poor vacuum conditions | + | |
- | ===== Ion Chamber ===== | + | Each channel can also be accessed from by going to “FRIB EXP” -> “Power Supplies” |
- | The biases for the anode and the drift electrode are each controlled separately via the S800 Detector HV Control. Parts of this detector rely on the same 12-Volt power supply used to power the bases of the FP Scintillator PMTs. If the vacuum-based interlock condition for protecting the FP Scintillator PMTs is triggered, the 12-Volt power supply will not be available for the Ion Chamber. | + | |
- | ===== CRDCs ===== | + | {{: |
- | Each of the two detectors, CRDC1 and CRDC2, has a separate bias control for the anode and the drift electrode via the S800 Detector HV Control. | + | |
- | ===== TPPACs ===== | + | The actual |
- | The bias of each of the two detectors, PPAC1 and PPAC2 is controlled individually via the S800 Detector | + | |
+ | {{: | ||
+ | Other examples of HV values used with different fragment beams are: | ||
+ | |||
+ | * **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) | ||
+ | |||
+ | * **IC**: | ||
+ | * Typically 200 V | ||