prex.dat

# (optional) Setup parameters for hamc for PREX

# Setup choices for HRS.  Using prex2 collimator normally
hrs_setup warmseptum thrstrans useempiricalangle 
#useprex2collim
#usepaulcollim
#usetrkcorr
#
#

# HRSTrans parameters.  Here is tune P used in the 2019 PREX run
quad_fields q1 0.11505 q2 -0.136543 q3 -0.159619

# For references, here is standard HRS tune, this does not belong with septum
# quad_fields q1 0.1746 q2 -0.1385  q3 -0.1281

# turn off A_T hole for PREX-2
spreader_collim a 9 z 4 t 0.0001

# HRS momentum and angle (4.74 for PREX-II)
HRS_P0 0.95
HRS_angle 4.74

# If Angle_cut is turned on, there is a cut on scattering angle 
# Ideally this should be commented out and let the collimator do the job.
# Angle_cut 3.0

HRS_arm left
# HRS_arm right

PREX_model horpb


# The HRS_acceptoff is normally commented out (or deleted)
# When uncommented it's a way of testing the acceptance model.
# Turn on one thing at a time to check the cuts at each point.
# 0 means ignore the acceptance limit, 1 means use it.
#  1         2       3        4      5     6     7        8        9   10
# target,  collim septin, septout,  q1, dipin, dipexit, q3in, q3exit, focal
# cut at collim
HRS_acceptoff   0 1 0 0 1 1 0 1 1 0
# HRS_acceptoff 0 0 0 0 0 0 0 0 0 0  



# Beam parameters.
# Raster is in meters, typ 0.006 (full width, so +/- half this)
# normally raster 0.006 x 0.004 
# current in uA.

beam  E0 0.95 E0sigma 0.00011   rastered  xraster 0.006  yraster 0.004 current 70


# range of angles (scatt, azimuth) in degrees
# phi=0 is up.  phi=90 is into HRS,  phi=180 is down.
out_angles thetamin 0.001 thetamax 20  phimin 0 phimax 180

radcor numer

# distance of detector to focal plane (meters)
detector dist 0

# uncomment the following line if you want to iterate
#  iterate

# Here is the variable to iterate
# kick:track P0 0.003

# to turn off ntup (good for high stats).  
# comment this out to receive an ntuple output.
# hamc_inout nontup