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hv_bias [2019/01/23 13:43] pereira |
hv_bias [2019/01/23 13:44] pereira |
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===== HV Remote control ===== | ===== HV Remote control ===== |
The high-voltage of the [[Detectors#Tracking Parallel Plate Avalanche Counters (TPPAC)|TPPACs]], [[Detectors#Ionization Chamber|Ion Chamber]], the [[Detectors#Cathode Readout Drift Chambers (CRDC)|CRDCs]], [[Detectors#Plastic scintillators|FP Scintillator]], and [[Detectors#Hodoscope|Hodoscope]] are remotely controlled via GUI control panel (see figure below). The GUI can be opened from the desktop of the [[Software#u6pc5 (data U6)|u6pc5]] control computer by clicking in the icon **High Voltage**, or from a Linux terminal by typing ''/usr/bin/wish mpod.tcl'' from directory **/user/s800/Documents/Run/s800mpod**. This application allows also to set a maximum limit in the detector current. The voltages of these detectors depend on the Z of the fragments to be measured and their energy. The figure below shows the HV GUI during experiment e10002, which used Si-26 and Al-25 fragments at around 115 MeV/u. These voltages can be used as a reference before starting an experiment. However, the final values will have to be modified during the beam tuning in order to optimize the performance of the detectors. | The high-voltage of the [[Detectors#Tracking Parallel Plate Avalanche Counters (TPPAC)|TPPACs]], [[Detectors#Ionization Chamber|Ion Chamber]], the [[Detectors#Cathode Readout Drift Chambers (CRDC)|CRDCs]], [[Detectors#Plastic scintillators|FP Scintillator]], and [[Detectors#Hodoscope|Hodoscope]] are remotely controlled via GUI control panel (see figure below). The GUI can be opened from the desktop of the [[Software#u6pc5 (data U6)|u6pc5]] control computer by log in as s800 user and clicking in the icon **High Voltage**, or from a Linux terminal (again, log in as s800 user) by typing ''/usr/bin/wish mpod.tcl'' from directory **/user/s800/Documents/Run/s800mpod**. This application allows also to set a maximum limit in the detector current. The voltages of these detectors depend on the Z of the fragments to be measured and their energy. The figure below shows the HV GUI during experiment e10002, which used Si-26 and Al-25 fragments at around 115 MeV/u. These voltages can be used as a reference before starting an experiment. However, the final values will have to be modified during the beam tuning in order to optimize the performance of the detectors. |
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{{: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}} |