Beam Wire chambers¶

We have two chambers used to monitor the secondary beam.
Almost everything at Wire Chambers applies to the beam chambers.

Upstream chamber

• placed just downstream of LArIAT in a break in the beam pipe
• HV setting:
• Controller: ftbfwc02

Target chamber

• placed just before the NOvA target in MC7
• HV setting:
• Controller: ftbfwc07

DAQ¶

These run using the FTBF wire chamber daq which can be accessed from one of the FTBF machines

ssh -XY ftbf_user@ftbf-cr-02.fnal.gov
cd /home/tmp_forJason/EDIT2018/MWPC-MCenter (location subject to change)
./daq-mcenter_<target || upstream>.py
data is saved to /home/tmp_forJason/EDIT2018/MWPC-MCenter/data

Monitoring and Plotting¶

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).
You need to have kinit rights to user extbeams (I need to make this more easily accessible -ATCS).

To run the offline script:

ssh -XY extbeams@ftbf-cr-02.fnal.gov
cd mtestwire/
source py3/bin/activate
python plot_wires_offline.py /home/tmp_forJason/EDIT2018/MWPC-MCenter/data/filename.dat

To run the monitoring script with the DAQ running:

ssh -XY extbeams@ftbf-cr-02.fnal.gov
cd mtestwire/
source py3/bin/activate
python plot_wires_nearline.py /home/tmp_forJason/EDIT2018/MWPC-MCenter/data/filename (*note there is no .dat ending)

Both scripts output images to: /home/nfs/extbeams/mtestwire/images