Privacy and Security Notice

 
 

Jefferson Lab Experiment E91-016

p(e,e'K+), W=2 GeV

Item Task Log Entry
  For a beam energy of 3.245 GeV set the spectrometers to:
  Momentum (GeV/c) Angle (degree) Trigger Collimator Prescaling
HMS -1.432 19.64 e--PID pion PS1=1500
SOS +1.299 14.23 K+-PID
no lucite		 large PS2=5000
Follow the proper prodecures for setting the magnets:
  • HMS current&field settings: 

    •      reinhold@jlabs2> ~cdaq/FIELD/field99 
     Input HMS momentum in GeV, electron is negative.
    -1.432
     Set current for Q1 =     185.91901039409 amps
     Set current for Q2 =    -147.72904488178 amps
     Set current for Q3 =     72.552229589288 amps
     Set NMR for Dipole =   -0.39241625371655 Tesla

    Set HMS Quads 200 A above required setting and then go down to nominal setting

  • Degauss SOS for protons and then go up to nominal setting
  
  Ask for 10 uA beam. Determine SOS 3/4 rate and then increase current such as to give 600kHz SOS 3/4 rate.  
Take 2hrs data on hydrogen and then 1/8 of the accumulated charge on 4cm dummy.  
Hall C Operating Manual
Last updated 11/4/99
By Jörg Reinhold(reinhold@fiu.edu)