1. Introduction

Simulators which were coded based on Geant4 were prepared for the nnΛ experiment (JLab E12-17-003). In the experiment, two HRSs in Hall A will be used for e' and K⁺ measurements. There are three independent simulators, TARG, HRSL, and HRSR.

TARG

This is a Monte Carlo simulator which is used for an estimation of the electron-beam energy loss in a target.

HRSL

This is a MC simulator for a scattered electron.

HRSR

This is a MC simulator for a K⁺.

2. Download the source codes

Lambda (TOHOKU machine) user

You can get the source by svn checkout:
$ svn co svn+ssh://(username)@lambda/users/svn/svnroot_JLab/E12-17-003/simulations

Others

I will upload the source files somewhere you can access without the lambda account.

3. How to use

Simulation for a beam energy loss in a target (TARG)

1. Modify input parameters for the simulation
   $ cd run/
   $ emacs -nw input/parameter.in
   (You can specify the beam energy, target thickness, raster size etc.)
   $ emacs -nw macro/run.in
   (Please specify the number of beams emitted)
2. Execute the simulation
   $ cd run/
   $ ./TARG macro/run.mac input/sample.in
   → then a ROOT file will be generated in a directory you specified in the input file.
3. Kinemtics calculation
   $ cd analysis/kine/
   $ emacs -nw input.dat
   (Please specify parameters as you want)
   $ make
   $ ./KINE_EEK
   → You will get a seed file which will be used further steps and a ROOT file for check

Simulation for scattered electrons (HRSL)

1. Compile the source files:
   $ cd build
   $ cmake ..
   $ make -j4
2. Input parameter modifications:
   $ emacs -nw run/input/sample.in
   (Please specify input parameters)
   $ emacs -nw run/macro/gun.mac
   (Please specify the number of particles emitted)
3. Execute the simulation:
   $ cd run/
   $ ./HRSL_nnL macro/gun.mac input/sample.in
   (Then a ROOT file will be generated in a directory you specified in the input file)

Simulation for K⁺s (HRSR)

1. Compile the source files:
   $ cd build
   $ cmake ..
   $ make -j4
2. Input parameter modifications:
   $ emacs -nw run/input/sample.in
   (Please specify input parameters)
   $ emacs -nw run/macro/gun.mac
   (Please specify the number of particles emitted)
3. Execute the simulation:
   $ cd run/
   $ ./HRSL_nnL macro/gun.mac input/sample.in
   (Then a ROOT file will be generated in a directory you specified in the input file)

4. Reports