SIMC (simc_gfortran) is the standard Hall C Monte Carlo for coincidence reactions, written in FORTRAN.
SIMC has recently been modified to remove all explcit dependence on CERNLIB. There are now 3 ways to generate output for SIMC.
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Run simc as normal (use "run_simc" script or interactively). This will generate a fortran ".bin" file in the worksim directory. Probably not too useful unless your analysis code is in fortran.
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Run simc and then use the helper application to convert the default output to a PAW ntuple (NOTE: this WILL require use of cernlib - on the JLab machines type "setup cernlib/2005"). The helper application is in util/ntuple and must be compiled separately from simc. Running SIMC + the ntuple application can be done in one command using "run_simc_ntup".
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Run simc and then use the helper application to convert the default output to a root tree (this program is also in fortran, but cernlib is not needed). The helper application is in util/root_tree and must also be compiled separately from simc. Running SIMC + the root-tree application can be done in one command using "run_simc_tree".
- SIMC simulates the optics (using COSY models) and apertures of the Hall C spectrometers (HMS, SOS, SHMS) and other spectrometers at Jefferson Lab (HRS's, BigCal, ...)
- Radiative effects, multiple scattering, ionization energy loss and particle decay are included
- Simple presecriptions are available for Final State Interactions, Coulomb Corrections and other effects.
SIMC has physics models for the following reactions.
- Elastic and quasi-elastic scatering: H(e,e'p), A(e,e'p)
- Exclusive pion production: H(e,e'pi+)n, A(e,e'pi+/-) (quasifree or coherent)
- Kaon electroproduction: H(e,e'K+)Lambda,Sigma, A(e,e'K+/-),A(e,e'K-)
- Semi-inclusive pion production: H(e,e'pi+/-)X, D(e,e'pi+/-)X
- Semi-inclusive kaon production: H(e,e'K+/-)X, D(e,e'K+/-)X
- Diffractive rho production: H(e,e'rho->pi+ pi-)p, D(e,e'rho->pi+ pi-)
- Not a full detector response simulation a la GEANT/GEANT4
- Does NOT simulate a large class of processes simultaneously to gerate backgrounds (like Pythia for example)
- Not a generic event generator. Processes are generated over a limited phase space matching the spectrometer acceptances
- Not hard to modify
An overview of SIMC can be found in this presentation at the 2009 Hall A Collaboration Meeting
For more information, see the SIMC Monte Carlo page in the Hall C Wiki
