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hv_bias [2013/12/14 15:39] pereira |
hv_bias [2023/10/17 09:40] noji |
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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 [[Detectors# | + | |
- | ===== Object Scintillator ===== | + | {{: |
- | The bias for the object scintillator is controlled via the H.V. power supply model 3002 D located in the crate to the right of the data-U6. The voltage will be adjusted at the beginning of the experiment. This scintillator has to be turned off or put on " | + | |
- | ===== FP Scintillators ===== | + | This “S800 HV Bias Power Supply” page is linked |
- | 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 | + | |
- | ===== Ion Chamber ===== | + | {{: |
- | 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 ===== | + | The ramp rate can be changed in the " |
- | Each of the two detectors, CRDC1 and CRDC2, has a separate bias control | + | |
- | ===== TPPACs ===== | + | Each channel can also be accessed from by going to “FRIB EXP” -> “Power Supplies” |
- | The bias of each of the two detectors, PPAC1 and PPAC2 is controlled individually via the S800 Detector HV Control. There are two types of detectors used for the TPPACs: either | + | |
+ | {{: | ||
+ | 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: | ||
+ | |||
+ | * **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 | ||