Difference between revisions of "KAON-LT specific intructions"

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'''Magnet cycling'''
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* Make sure to follow the appropriate magnet cycling procedure for the HMS and SHMS [https://hallcweb.jlab.org/wiki/index.php/How_to_operate_and_monitor_the_Spectrometer_Magnets magnets]
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'''Rates:'''
 
'''Rates:'''
 
* Single particle and coincidence rates have been estimated for all runs. Watch the scintillator
 
* Single particle and coincidence rates have been estimated for all runs. Watch the scintillator

Revision as of 11:53, 22 August 2018

Magnet cycling

  • Make sure to follow the appropriate magnet cycling procedure for the HMS and SHMS magnets

Rates:

  • Single particle and coincidence rates have been estimated for all runs. Watch the scintillator

rates (S1 and 3/4 planes) for each spectrometer for an indication of the particle rate through the wire chambers, and if actual rate is substantially (> 50%) higher than what is listed in the run plan, the RC should be warned.

  • We want to keep the particle rate in each spectrometer below 650 kHz, and for some low

energy runs this will require the beam current to be reduced from the nominal 70 μA value.

  • For some low rate runs, it may be possible to use up to 100 μA beam with particle rates still

below 350 kHz. Consult with the RC before requesting a higher beam current.

  • The prescaler values in the run plan are a guide. Adjust them to keep the singles data rate

in each spectrometer between ∼100-150 Hz.

  • All run times assume 100% running efficiency. Adjust the time for actual delivered beam

time, and let the RC know if the efficiency drops below 60% for an extended period.