Index of /~dlr/g-2/g2/examples/example9
g2_tracking example input files October 3, 2017
Example9
g-2/examples/example9 - Start of tracking is element DQ24TOSQA of M5 line, which is 32.5cm upstream of Q021.
FILE1: Copy this file <input.dat> to your working directory
FILE2: Copy the lattice file <bmad_all_configs_fringe_inf_grid_m5.> to your working directory
OTHER FILES: On Cornell linux use the command </home/dlr10/development9_linux/g-2/softlink_lnx>
On the Fermi grid use </gm2/app/users/drubin/bmad_dist_fix/g-2/softlink_gm2>
Executed in your working directory it will create soft links to all neccessary data files
The lattice file is 'bmad_all_configs_fringe_inf_grid_m5.'
The m5 line is included (excluded) by the last line in the lattice file
use, inj ! excludes m5 line. tracking starts at entrance to iron
use, m5_to_inj_to_ring ! includes m5 line
Fiber harps are included. Calorimeters (and fiber harps) can be turned on or off by commenting/uncommenting calls
!call, file = calorimeter_lattice.
call, file = fiber_monitor_lattice.
The calorimeter_lattice file adds the 24 calorimeters to the lattice. And if decay positrons hit any of the
calorimeters, the info will be written to 'calo_hits'.
The fiber_monitor_lattice file adds the 4 harps to the lattice. Hits in fiber harps are written to 'harp_plane_hits.dat'
! <lat_file_name> :character string - BMAD format lattice file
lat_file_name = 'bmad_all_configs_fringe_inf_grid_m5.' (this file calls various quad models that can be used by selective commenting of calls)
Reads muon phase space distribution from 'particles_endm4m5_100.txt'
muon_file = 'particles_endm4m5_100.txt'
Twiss parameters at inflector exit
! <twiss> :12-real - betax, betay, alphax, alphay, etax, etapx, etay, etapy, phix, phiy, gammax, gammay at inflector
twiss = 2.0, 10.0, 0., 0.0, 0.0, 0., 0., 0., 0.7, 0.7, 0., 0.
The distribution can be defined at the end of the inflector (<twiss_ref = 'end'>) or half way through (<twiss_ref = 'center').
Here the end of the inflector is chosen
! <twiss_ref> : Reference point within inflector for twiss parameters specified in previous line. 'end' = at inflector exit. 'center' = halfway through inflector
twiss_ref = 'end'
Tracking begins at the DQ24TOSQA of M5 line, which is 32.5cm upstream of Q021.
The transfer matrix from the start (DQ24TOSQA) to the end of the inflector is computed and used to rotate the distribution the match
twiss parameters at the starting point. That is, the distribution will have beta, alpha at the start of the line that will transform to the
specified beta,alpha at the inflector exit.
!<start_tracking_at_inflector_exit>: logical - if true then start tracking the distribution at the inflector exit, if false, start tracking at end of M5 line
start_tracking_at_inflector_exit = F
After the distribution is created it can be offset in each of the phase space coordinates
The offsets are at the entrance to the backleg iron with respect to the centerline of the inflector
! <initial_offsets> :real - x, y, z, x-angle, y-angle, deltaE/E
! - offset of beam at entrance into the hole in the ring iron, with respect to the tangent through the center of the inflector
initial_offsets = -4.3477E-02 0. 0. 2.0681E-02 0. 0.
In order that there is muon decay and positron tracking (or not) we need to set
!<spin_tracking_on>: logical - if true then include spin tracking of muons. Default = true
spin_tracking_on = F
!<muon_decay>: logical - if true then include muon decay. Default = true
muon_decay_on = F
For all the details see the input.dat file
Here is the complete set of data files.
Create soft links to all necessary files with the command
</home/dlr/development9_linux/g-2/softlink_lnx>
to create the following soft links
ln -s /home/dlr10/development9_linux/production/bin/g2_tracking
ln -s /home/dlr10/development9_linux/g-2/files/libncurses.so.6
ln -s /home/dlr10/development9_linux/g-2/files/pulse_127cm.dat
ln -s /home/dlr10/development9_linux/g-2/magneticfield/ring_inject_bfield3d_wuzheng_extended.dat
ln -s /home/dlr10/development9_linux/g-2/magneticfield/inf_field_alone.dat
ln -s /home/dlr10/development9_linux/g-2/files/muons/VDstop_DS_436_12000.dat
ln -s /home/dlr10/development9_linux/g-2/files/muons/particles_endm4m5_100.txt
ln -s /home/dlr10/development9_linux/g-2/files/KICKER_E989_NoRolledEdges.dat
ln -s /home/dlr10/development9_linux/g-2/files/quads/
ln -s /home/dlr10/development9_linux/g-2/files/calorimeter_lattice.
ln -s /home/dlr10/development9_linux/g-2/files/fiber_monitor_lattice.
ln -s /home/dlr10/development9_linux/g-2/files/walls_free.bmad
ln -s /home/dlr10/development9_linux/g-2/files/walls_quads2-4.bmad
ln -s /home/dlr10/development9_linux/g-2/files/backleg/
ln -s /home/dlr10/development9_linux/g-2/files/bmad_all_configs_fringe_inf_grid.
ln -s /home/dlr10/development9_linux/g-2/files/bmad_grid_fringe_inf.bmad
ln -s /home/dlr10/development9_linux/g-2/magneticfield/BrFourier2016.dat
ln -s /home/dlr10/development9_linux/g-2/magneticfield/BzFourier20170628_LogID983.dat
ln -s /home/dlr10/development9_linux/g-2/files/g-2_FFT_04032015.lat
ln -s /home/dlr10/development9_linux/g-2/files/g-2_FODO_04032015.lat
ln -s /home/dlr10/development9_linux/g-2/files/parameters_g-2_03112015.lat
or <gm2/app/users/drubin/bmad_dist_fix/g-2/softlink_gm2>
to create the following soft links
ln -s /gm2/app/users/drubin/bmad_dist_fix/production/bin/g2_tracking
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/libncurses.so.6
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/pulse_127cm.dat
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/magneticfield/ring_inject_bfield3d_wuzheng_extended.dat
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/magneticfield/inf_field_alone.dat
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/muons/VDstop_DS_436_12000.dat
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/muons/particles_endm4m5_100.txt
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/KICKER_E989_NoRolledEdges.dat
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/quads/
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/calorimeter_lattice.
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/fiber_monitor_lattice.
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/walls_free.bmad
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/walls_quads2-4.bmad
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/backleg/
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/bmad_all_configs_fringe_inf_grid.
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/bmad_grid_fringe_inf.bmad
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/magneticfield/BrFourier2016.dat
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/magneticfield/BzFourier20170628_LogID983.dat
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/g-2_FFT_04032015.lat
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/g-2_FODO_04032015.lat
ln -s /gm2/app/users/drubin/bmad_dist_fix/g-2/files/parameters_g-2_03112015.lat
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