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Beam Wire chambers » History » Version 13

Andrew Sutton, 11/15/2019 02:06 PM

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h1. Beam Wire chambers
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We have two chambers used to monitor the secondary beam.
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Almost everything at "Wire Chambers":https://cdcvs.fnal.gov/redmine/projects/novatestbeam/wiki/Wire_chambers applies to the beam chambers.
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Upstream chamber
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* placed just downstream of LArIAT in a break in the beam pipe
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* HV setting:
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* Controller: ftbfwc02 
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Target chamber
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* placed just before the NOvA target in MC7
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* HV setting:
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* Controller: ftbfwc07
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h3. DAQ
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These run using the FTBF wire chamber daq which can be accessed from one of the FTBF machines
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<pre>
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ssh -XY ftbf_user@ftbf-cr-02.fnal.gov
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cd /home/tmp_forJason/EDIT2018/MWPC-MCenter (location subject to change)
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./daq-mcenter_<target || upstream>.py
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data is saved to /home/tmp_forJason/EDIT2018/MWPC-MCenter/data
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</pre>
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h3. Monitoring and Plotting
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There is an on/near-line monitoring script along with an offline version of which are also housed on the FTBF machines (below I use ftbf-cr-02 but any of them should work). 
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You need to have kinit rights to user extbeams (I need to make this more easily accessible -ATCS).
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To run the offline script:
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<pre>
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ssh -XY extbeams@ftbf-cr-02.fnal.gov
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cd mtestwire/
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source py3/bin/activate
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python plot_wires_offline.py /home/tmp_forJason/EDIT2018/MWPC-MCenter/data/filename.dat
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</pre>
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To run the monitoring script with the DAQ running:
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<pre>
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ssh -XY extbeams@ftbf-cr-02.fnal.gov
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cd mtestwire/
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source py3/bin/activate
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python plot_wires_nearline.py /home/tmp_forJason/EDIT2018/MWPC-MCenter/data/filename (*note there is no .dat ending)
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</pre>
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Both scripts output images to: /home/nfs/extbeams/mtestwire/images