The GUI_launch GUI

 

Overview

This Graphical User Interface (GUI) is the startup point for every GUI for the beam-line GUI control and High Voltage control. Once this application is launched, every other GUI is under the mouse.

How to launch it

Launching the GUI is very easy from the clasrun account :

1.

First log on clas10 under clasrun , on an X-terminal.

		rlogin clas10 -l clasrun
		password: ******** wouldn't u like to know ;-)?

2.

Then setup the display for your terminal :

		setenv DISPLAY urdisplay

Don't forget to set the access rights for clas10 (something like : xhost +clas10).

3.

Finally, just type :

		gui_launch

An medm screen (Figure 4.1) should shortly pop up on your terminal.

  

Figure 4.1: The GUI_launch window

How to use it

There are four popup menus, two for beam line devices, one for the High-Voltage and one used to launch various tools. We will focus on beam line devices only, the Table 4.2.3 and 4.2.3 list the different softwares programs that can be launched through this GUI.

 

 

Table 4.1: The Beam-Line Popup Menus : Motor devices

2|c|The Beam-Line Popup Menus : Motor devices
fission	Moves a chariot in the photon beam. Initialy designed for some test for the photo-fission experiment group, it can put various devices in the beam-line in front of the CLAS detector.
harp	Controls the radiator and the harp scans, see section 4.3.
collimator	Moves the two photon collimators along the beam-line, see section 4.5.
converter	A little piece of metal to create electrons-pairs from the photon beam (for intensity measurements) is moved by this GUI. See section 4.7.
help	Some help. (this is the help on the help, don't let me write any help section about it ;-)

 

 

Table 4.2: The Beam-Line Popup Menus : Other devices

2|c|The Beam-Line Popup Menus : Other devices
scaler	Uses 11 channels for beam halo measurement and others for various counting. More precisions 4.4.
minitorus	Powers the minitorus magnet that prevents low energy electrons around the target to saturate the drift chambers of CLAS.
forward_scaler	This scaler measures the beam halo after CLAS. More information 4.6
faraday_cup viewer	A very simple display to easily visualize the Faraday-Cup current.
help	Some help.

Hardware and Software

The only important thing to ensure that this GUI will run properly is to set the $EPICS_DISPLAY_PATH to reflect the actual locations of the GUIs that have to be launched ¹⁰.

File informations

The application is under CVS monitoring and is part of the 'general' application tree. To check it out, type cvs checkout general the only file that is related to this section is general/medm/gui_launch.adl.

Footnotes

...launched¹⁰

This is done by the gui_launch script