The laser control software (Medusa) is hosted on the Windows PC ATPPC023. First connect via the command
atplaser@lxg1297:~$ xfreerdp /w:2500 /h:1400 /u:atplaser /v:atppc023.campus.gsi.de
You will be asked for the usual "atplaser" password. Please be aware that you're typing on an english keyboard!
Medusa is simply started by the link on the Desktop called "Medusa Laser Control". After startup you will see the main window (Attachment 1).
Please make also sure that the Wavelength meter software is running!!! Otherwise, wavelengths cannot be logged
In the main window different actions can be made (see also Attachment 2):
- Open additional views, options are "Display" (figure of recent values), "MBS Messenger" (connection status with MBS, lower part of Attachment 2), "Devices View" (most recent values of different devices, right part of Attachment 2)
- Make sure that "Make Data Available to MBS" is selected
- Definition of laser scan Parameters. The laser will perform an automated scan between the selected wavelengths. It's possible to define an increment or a number of laser steps as scan parameter. After the laser has received the specified number of rising edges on Trigger port #1 (Do not change the port number, since this corresponds to the Hardware setting!) the laser advances to the next frequency until the number of steps and scan repetitions is completed. There is an option to start the laser scan automatically, when a trigger was received on port #3 (The cabling is done. However, the pulse generation must be provided from SCU sddsc221 channel IO1 of timing receiver tr1 whenever needed).
- The button can be used to start and stop a scan. In some cases there might occur an USB communication error with the laser, which can also be reset by this button.
- IMPORTANT NOTE: Make sure that the FCU is enabled, since otherwise the BBO of the FCU does not follow the wavelength of the laser, which results in NO UV output power.
- After "Make Data Available to MBS" option (see 2.) has been selected, Medusa is awaiting the MBS client to connect.
- View of most recent parameter settings.
The complete startup routine to perform a laser scan is the following:
- Start medusa as described above
- Connect to "r4l-41":
atplaser@lxg1297:~$ ssh atplaser@r4l-41
- Change to the directory of the Th-MBS version:
R4L-41 > cd mbsrun/E0052/DAQ1
- Make a reset (optional):
R4L-41 > resl
- Start mbs:
R4L-41 > mbs
- Once you are in the mbs environment start the acquisition:
mbs > @startup
- Connect to the file server:
mbs > @connectdisk
- Start acquisition:
mbs > sta ac
With this command, the connection to the Medusa server should be established. This can be verified by the line
-R4L-41 :read_meb :connected succesfully to LabView Server.
of the MBS output, and in the MBS Messenger View of Medusa stating
Connected! Established connection to ...
- Open file:
mbs > @openfile
- Press Run-button in the Go4 analysis (must be started beforehand)
- Start laser scan in medusa
- Press Stop-button in the Go4 analysis
- Close file:
mbs > @closefile
As long as nothing crashes (keep fingers crossed), only steps 9-13 need to be repeated for subsequent scans. |