How to use the High Voltage Control (HVC) for bonus

V.Tvaskis, N.Kalantarians

1. Introduction

The High Voltage for the bonus detector is run through 4 channels, numbered 0 1 2 3:

Channel 0: Left GEM

Channel 1: Left Cathode

Channel 2: Right GEM

Channel 3: Right Cathode

Left and Right refers to the sides of the detector for the upstream beam.

2. Locating/Recovering HVC gui

The HVC gui is going to be running on the clonpc3 machine.

Log-in: clasrun

Password: <ask someone in the counting room>

Directory: /home/clasrun/BONUS/GUI/HV

Run gui: /start_hv.sh

(If the program is already running on another terminal and all you want to do is to open another copy of the GUI, the command is

wish -f hv_bonus_outputs.tcl )

When the program starts to run, an extra window will open which gives the time in fixed increments. This is the Output Window.

3. GUI

The HVC main gui shows the Outputs and is shown in Figure 1. The Inputs button gives access to that corresponding panel and is shown in Figure 2.

3.1 Outputs panel

The Outputs gui is very basic. The yellow boxes label the read-outs (I and V) and the blue boxes label the channels. The White fields are where the read-outs are given. The Quit button exits the program entirely.

One thing to note is that the fields here are only read-out and setting of current or voltage cannot be done on this panel. Nor can the channels be turned on or off. In order to these things, the user has to access the Inputs panel.

Figure 1 Output gui panel

3.2 Inputs panel

The CHANNEL-_ ON/OFF buttons, located at the top, turn their respective channels on/off and are either red (active) or white (inactive).

Limiting current (µA) can the set by entering the values in the grey fields, located in the middle section of the panel, which correspond to each channel and then pressing the blue button, on the right of that field, which says Set to submit. The small yellow boxes give the respective current read-outs. The procedure for setting Input Voltage (Volts) and Ramp UP/DOWN is similar.

The Status Ch-_ indicators feature grey fields which give all the states possible for their corresponding channels. When a field becomes red, that is then the present status of that corresponding channel.

All Channels ON/OFF turns all the channels on/off, gradually, by Ramping them Up/Down, respectively.

Kill All Channels will turn off all the channels immediately without any ramping.

QUIT closes the Inputs panel.

The field on the bottom-left part of the panel indicates whether or not the program is running. When it is running, this field blinks red and green saying Connection.

Figure 2 Inputs panel