MOLLER GEANT4 Simulations

I am going to suggest chapters and possibly sections (an outline) for the MOLLER GEANT4 documentation. People will need to provide the text for the different sections. People should also feel free to suggest a different outline or set-up.

Overview

MOLLER

DOxygen Documentation

Getting Started

Quick start (see important details below):

In a terminal window (on ifarml6, for example) type:

mkdir ~/scratch

mkdir ~/scratch/ROOTfiles (you may actually want to make this a link to somewhere with more space)

setenv MOLLERGEANTDIR <directory where you would like to have the simulation/moller12gev>

(maybe in /w/halla/parity/disk2/)

cd <directory where you would like to have the simulation>

svn checkout https://jlabsvn.jlab.org/svnroot/moller12gev

cd moller12gev

source env_jlabcue

make clean

make

cd analysis

make clean

make

cd ../

jsub eesim.jsub OR change number of events in runee.mac to <10k and type bin/Linux-g++/moller_sim prerun.mac run_ee.mac

change analysis/inifiles/sample.ini to point to rootfile that is eventually created in ~/scratch/ROOTfiles

(may need to change number of events to match run_ee.mac)

analysis/mollerClass analysis/inifiles/sample.ini

eog plots/moller_myr.gif (for example)

Getting the simulation

In a terminal window, type:

svn checkout https://jlabsvn.jlab.org/svnroot/moller12gev

Get the field maps:

Proposal: upstream, hybrid

Default: upstream, hybrid

-OR- link to some central location, on the farm machines:

The defaults are currently (both in cylindrical coordinates):

ln -s /w/halla/parity/disk2/jmammei/tosca_stuff/MAPFILES/blockyHybrid_3.0.txt fieldmap_back.txt

ln -s /w/halla/parity/disk2/jmammei/tosca_stuff/MAPFILES/blockyUpstream_1.1.txt fieldmap_front.txt

Setting the environment variables

You'll have to make sure your environment variables are set correctly. If you are running the simulation on your
own machine, for now you'll have to set the environment variables yourself, but be sure to also change the version
of GEANT in the local_moller_settings.dat file.

On ifarml1 or ifarml6, type:

source env_jlabcue

Batch Mode

To run in batch mode:

Create a scratch directory in your home directory with a link to a ROOTfiles directory

Create your own .mac file or modify (or modify/use run_ee.mac, run_ep.mac or run_ine.mac)

Type, for example: bin/Linux-g++/moller_sim run_ee.mac

Note: The default .mac files are intended to run on the farm using jsub, but to test you can change the number of
events to 10k instead of 100k, for example.

Interactive Mode

Right now the visualization works marginally well. It uses OpenGL and it is very simple - you can only change the
display with one of the macros that comes with svn. Ultimately we will want to be able to change the view using
the mouse in the window, and will even probably want to develop a GUI.

For now, to use the visualization on the farm machines, in the moller12gev directory:

Type:

bin/Linux-g++/moller_sim

To change the view, modify vis.mac and then, in the GEANT4 terminal, type:

/control/execute vis.mac

To exit the interactive mode, type:

exit

Note: To use the visualization, at least from a Windows machine, I had to make sure my X-server was compiled

with the OpenGL libraries. I used Xming-mesa, and it works well.

Running on farm

If you want to run multiple simulations at the same time, or even one simulation with more than about 10k events,
you'll want to use the JLab Auger.

If you haven't already, create a scratch directory in your home directory with a link to a ROOTfiles directory

To submit a job to the farm:

Create your own .mac file (or modify/use run_ee.mac, run_ep.mac or run_ine.mac)

Create your own .csh file (or modify/use runsim_ee.csh, runsim_ep.csh or runsim_ine.csh)

Create your own .jsub file (or modify/use eesim.jsub, epsim.jsub, inesim.jsub)

Then type, for example:

jsub eesim.jsub

Note: If you want to receive email notification of the completion of your job(s) you have to change the line

in the jsub file:

MAIL: user@jlab.org -> your username at jlab or another email address

Look at output

From moller12gev directory:

If you haven't compiled the analysis code yet:

cd analysis

make

cd ../

Then:

Modify sample.ini file in the analysis/initfiles directory to have the name(s) of the rootfile(s)

From terminal: ./analysis/mollerClass analysis/inifiles/sample.ini

The output and plot files should be created in your output/ and plots/ folders

--> see more details in the README file

Benchmarks of the Simulation

Return to MOLLER at 11 GeV E09-005