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hv_bias [2014/12/04 18:25]
pereira [HV Remote control]
hv_bias [2015/10/19 12:45]
pereira [HV Manual control]
Line 7: Line 7:
 {{:​wiki:​hv-gui.png?​700|GUI control panel of the S800 detectors HV}} {{:​wiki:​hv-gui.png?​700|GUI control panel of the S800 detectors HV}}
  
 +
 +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
  
 ===== HV Manual control ==== ===== HV Manual control ====
 Apart from the detectors listed above, the voltages of the [[Detectors#​Plastic Scintillators|object scintillator]] ​ Apart from the detectors listed above, the voltages of the [[Detectors#​Plastic Scintillators|object scintillator]] ​
- and the **electrostatic gate** of the [[Detectors#​Cathode Readout Drift Chambers (CRDC)|CRDCs]] are adjusted manually. ​+ and the electrostatic gate of the [[Detectors#​Cathode Readout Drift Chambers (CRDC)|CRDCs]] are adjusted manually. ​
  
 The bias for the object scintillator is controlled via the H.V. power supply {{:​wiki:​Manual_Canberra_HV_3002D.pdf|Canberra model 3002 D}} located in the crate to the right of the data-U6 (see figure below). The voltage will be adjusted at the beginning of the experiment. This scintillator has to be turned off or put on "​standby"​ when entering the vault due to its sensitivity to light. The voltage used for this detector depends on the fragment nuclei that will be measured. Check with **Daniel Bazin** for a reference value. The bias for the object scintillator is controlled via the H.V. power supply {{:​wiki:​Manual_Canberra_HV_3002D.pdf|Canberra model 3002 D}} located in the crate to the right of the data-U6 (see figure below). The voltage will be adjusted at the beginning of the experiment. This scintillator has to be turned off or put on "​standby"​ when entering the vault due to its sensitivity to light. The voltage used for this detector depends on the fragment nuclei that will be measured. Check with **Daniel Bazin** for a reference value.
  
-In order for the [[Detectors#​Cathode Readout Drift Chambers (CRDC)|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). The typical value is 20 V.+In order for the [[Detectors#​Cathode Readout Drift Chambers (CRDC)|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). The typical value is 20 V.
    
  
 {{:​wiki:​nim-crate2-du6.jpg?​400|NIM crate 2 in data-U6}} {{:​wiki:​nim-crate2-du6.jpg?​400|NIM crate 2 in data-U6}}
  
hv_bias.txt ยท Last modified: 2019/01/23 13:44 by pereira