Differences

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--- hv_bias [2013/12/14 15:26]
pereira [Object Scintillator]
+++ hv_bias [2013/12/14 15:46]
pereira [CRDCs]
@@ Line 3: / Line 3: @@
 ===== General Information =====
-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 scintillator and the FP Scintillator are each controlled separately as described below under the sections for each detector.
+The [[Detectors#Tracking Parallel Plate Avalanche Counters (TPPAC)|TPPACs]], the [[Detectors#Ionization Chamber|Ion Chamber]], and the [[Detectors#Cathode Readout Drift Chambers (CRDC)|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 [[Detectors#Plastic scintillators|Object scintillator]] and the [[Detectors#Plastic scintillators|FP Scintillator]] are each controlled separately as described below under the sections for each detector.
 ===== 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.
+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. 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.
 ===== FP Scintillators =====
@@ Line 15: / Line 15: @@
 ===== 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.
+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. Please keep in mind that a change in the drift voltage of the CRDCs strongly effects the drift velocity of the electrons and a new mask calibration has to be done to be able to determine the y position of particles.
 ===== TPPACs =====

S800 Documentation

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