Difference between revisions of "D2n kinematics"

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(Created page with "= '''VERY''' rough sketch of updated d2n kinematics = Reduced kinematics list to accommodate limited beam time (dropped 1/4 of kinematics) --------- Beam Params ----...")
 
(VERY rough sketch of updated d2n kinematics)
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* Then move to kin C and Z (high-Q2)
 
* Then move to kin C and Z (high-Q2)
 
* Scheduling of Kin B, Y and 1-pass running would depend on how the Accel/target/virus behaves
 
* Scheduling of Kin B, Y and 1-pass running would depend on how the Accel/target/virus behaves
 +
 +
== Extra runs ==
 +
* Confirm we have all the optics we need!
 +
** Analyze and get the new matrices in the analyzer
 +
** Make sure we have empty target runs for all kinematics and all optics configurations to help disentangle beamline window contributions
 +
 +
* Nail down estimates for ref cell running (N2, H2, 3He, empty)
 +
 +
* Minimal/no positron running?
 +
*** Perhaps measure the positron background in HMS at 20 degree and compare with model?

Revision as of 14:15, 18 May 2020

VERY rough sketch of updated d2n kinematics

Reduced kinematics list to accommodate limited beam time (dropped 1/4 of kinematics)

      ---------  Beam Params ----------
            E_beam = 10.4 GeV/c
            I_beam = 30 uA
            P_targ = 0.50
            P_beam = 0.80
          ---------  HMS ----------
       E'    theta    x        Q2       W
 A     4.2   13.5     0.207    2.414   3.178
 B     4.2   16.4     0.305    3.554   2.993
 C     4.0   20.0     0.418    5.018   2.806
          --------- SHMS ----------
       E'    theta    x       Q2      W
 X     7.5   11.0     0.527   2.866   1.859
 Y     6.4   14.5     0.565   4.240   2.036
 Z     5.6   18.0     0.633   5.701   2.046


  • Not shown is the 1-pass running (2'ish days)
  • We plan to start at 5-pass with kinematics A and X.
  • Then move to kin C and Z (high-Q2)
  • Scheduling of Kin B, Y and 1-pass running would depend on how the Accel/target/virus behaves

Extra runs

  • Confirm we have all the optics we need!
    • Analyze and get the new matrices in the analyzer
    • Make sure we have empty target runs for all kinematics and all optics configurations to help disentangle beamline window contributions
  • Nail down estimates for ref cell running (N2, H2, 3He, empty)
  • Minimal/no positron running?
      • Perhaps measure the positron background in HMS at 20 degree and compare with model?