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hv_bias [2013/12/14 15:39] pereira |
hv_bias [2023/10/16 08:30] 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 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 ===== | + | The ramp rate can be changed in the " |
- | The biases for the anode and the drift electrode | + | |
- | ===== CRDCs ===== | + | 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. |
- | 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 ===== | + | {{:wiki: |
- | 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 “classic” PPACs or PPACs with individual strip readouts for handling higher rates. There is not a difference between the two detector types in terms of how the data is used. They do differ in terms of electronics and acquisition. | + | |
+ | 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 | ||