Fiber Optical Sensors in CMS

This sandbox is intended to collect all information on the FOS4CMS that I have. Format of this info is not yet settled...

Monthly FOS reports

- FOS report for January 2010 : FOSReport_201001.pdf
- FOS report for February 2010 : FOSReport_201002.pdf
- FOS report for March 2010 : FOSReport_201003.pdf
- FOS report for April 2010 : FOSReport_201004.pdf
- FOS report for May 2010 : FOSReport_201005.pdf
- FOS report for June 2010 : FOSReport_201006.pdf
- FOS report for July 2010 : FOSReport_201007.pdf
- FOS report for August 2010 : FOSReport_201008.pdf
- FOS report for September 2010 : FOSReport_201009.pdf

Data files

In the FOS project data is currently saved as ASCII files that contain the indiviual peak wavelengths and levels for each active DUTs. These ASCII files are then analyzed by a ROOT macro that besides the calculation of the measured physical values makes the satellite peak elimination, too. The resulted ROOT files then merged together in order to give a continuous data set. Currently it is: sm125_peak_data_201001-09.root

Recipe of the on-demand plot making

To generate the standard plots of the FOS system (same as those in the reports) use FOSGraphGenMagnet.C.

Its use is:

.x FOSGraphGenMagnet.C("sm125_peak_data_201001-04.root",20100401,0,20100501,0)

where the parameters are the following:

  • parameter 1: name of the root file containing the evaluated data

  • parameter 2: start date in YYYYMMDD format

  • parameter 3: start time in H24MISS format (if hour <10 only one digit is needed!)

  • parameter 4: end date in YYYYMMDD format

  • parameter 5: end time in H24MISS format (if hour <10 only one digit is needed!)

If parameter 1 (parameter 4) is substituted with a simple 0 it is recognized as the start(end) of the dataset in the ROOT file.

How to make a (monthly) report

How to reach the measurement machine

Both the LabView and the Java-based FOS projects are installed and run on the machine cms-alig-sen-02 (the production version is the Java-based one, that is supposed to run everytime). This machine is however hidden behind the CMS firewall therefore can only be reached through one of the CMS headnodes cmsusr0.cern.ch, cmsusr1.cern.ch or cmsusr2.cern.ch. In addition CMS headnodes are also hidden behind the CERN firewall, therefore if You want to reach the cms-alig-sen-02, You have need either to go through them or tunnel trough tem both.

Steps to reach cms-alig-sen-02 (if You start the connection from the CERN internal network, skip point 1):

1. yourmachine> ssh -X -l yourname lxplus.cern.ch

2. lxplus> ssh -X -l yourname cmsusr0

3. cmsusr> rdesktop -g1024x700 cms-alig-sen-02 &

4. when the Windows login screen pops up, type in the usual userid: Utente and the password we all know (if not, please contact me) The domain must be CERN.

Of course, since this is going to be an X connection, You have to enable the connection to Your Xserver first. If You run Windows on Your host machine, You have to have an extra Xserver installed. I have good experiences with Xming, but this is not the only one that can be used. From my Windows machine I used to use PuTTY to connect to the Unix/Linux machines. In order to be able to accept the X windows the remore server tries to send, I had to set the 'Enable X11 forwarding' checkbox in the SSH/X11 menu. This option forwards the X windows to my Xming Xserver.

-- ZoltanSzillasi - 02-October-2010

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Topic revision: r15 - 2020-08-19 - TWikiAdminUser
 
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