HV HowTo for Users

The High Voltage is controlled by LeCroy 1458 crates and associated modules like the 1461N. A trailing "N" means negative, and a "P" means positive HV.

Simplified Instructions : To control the HV in Hall A, do the following

Login as "adev" on the "adaql1" or "adaql2" computers.

cd ~adev/slowc

To run the Left HRS alone: ./hvs LEFT

To run the Right HRS alone: ./hvs RIGHT

To run the beamline crate: ./hvs BEAMLINE

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I haven't gotten around to adaping this yet, but here are some old but useful instructions

http://hallaweb.jlab.org/equipment/daq/HVhelp.html

http://hallaweb.jlab.org/equipment/daq/gen_slow_control.html

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Troubleshooting

A number of things can go wrong. If these solutions don't work for you, call an expert.

1. HV crate is on ? There are two power supplies which must be turned on.

2. The GUI connects to a Perl server on a PC. The PC/server then talks to the HV crate via a serial connection. If the server isn't working for some reason, rebooting the PC may help. The name of the PC is discovered in the tab corresponding to that crate; e.g. intelha3 on Left HRS.