Difference between revisions of "Run Group A"

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* Make sure the hydrogen target is empty.
 
* Make sure the hydrogen target is empty.
* Ramp the torus to 75% field (negatives intending/positive polarity); Ramp the solenoid to 100% field (positive polarity)
+
* Ramp the torus to 100% field (negatives intending/positive polarity); Ramp the solenoid to 100% field (positive polarity)
 
* Prepare for tuning using a 5 nA beam to the tagger yoke: SVT (contact expert to do it), MVT, CND, CTOF, FTT, HTCC, DC, FTOF should be off, tagger magnet should be on. Follow the instructions in the "Establish-physics quality beam" procedure at [https://wiki.jlab.org/clas12-run/images/e/e3/Estab_beam.pdf]. Compare harp scan to the ones performed for KPP at [https://logbooks.jlab.org/entry/3455743 2C21] and [https://logbooks.jlab.org/entry/3455744 2C24]. Consult with the beamline expert in case of issues.
 
* Prepare for tuning using a 5 nA beam to the tagger yoke: SVT (contact expert to do it), MVT, CND, CTOF, FTT, HTCC, DC, FTOF should be off, tagger magnet should be on. Follow the instructions in the "Establish-physics quality beam" procedure at [https://wiki.jlab.org/clas12-run/images/e/e3/Estab_beam.pdf]. Compare harp scan to the ones performed for KPP at [https://logbooks.jlab.org/entry/3455743 2C21] and [https://logbooks.jlab.org/entry/3455744 2C24]. Consult with the beamline expert in case of issues.
 
* If beam profiles at the tagger are acceptable, move to beam tuning to the Faraday Cup with a 5 nA beam. Again, refer to the instructions in the "Establish-physics quality beam" procedure at [https://wiki.jlab.org/clas12-run/images/e/e3/Estab_beam.pdf]. Compare harp scan with one performed for KPP at [https://logbooks.jlab.org/entry/3455750 2H01].  
 
* If beam profiles at the tagger are acceptable, move to beam tuning to the Faraday Cup with a 5 nA beam. Again, refer to the instructions in the "Establish-physics quality beam" procedure at [https://wiki.jlab.org/clas12-run/images/e/e3/Estab_beam.pdf]. Compare harp scan with one performed for KPP at [https://logbooks.jlab.org/entry/3455750 2H01].  

Revision as of 18:57, 5 February 2018

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