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simc-file-input

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    Mark Jones authored and Mark K Jones committed
    Added file shms-2017-26cm-monte_quads_p18.fox
    Change effective lengths of quads to match
    measured values;
        LBE := 0.80 ;              {Effective length of bender}
        L1E := 1.873 ;              {Effective length of Q1}
        L2E := 1.587 ;               {Effective length of Q2}
        L3E := 1.587 ;               {Effective length of Q3}
    
    modified from 9.187419156 to 9.06924
    
    and increased quad fields by 1.8% to
    reflect data that found that the dipole
    was off by 1.8% when setting it.
    
       Q1 := -2.136856 ;
       Q2 :=  4.527000 ;
       Q3 := -2.954160 ;
    b34ccd6e
    History

    simc_gfortran - Hall C/A Physics Monte Carlo

    SIMC (simc_gfortran) is the standard Hall C Monte Carlo for coincidence reactions, written in FORTRAN.

    Features

    • 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.

    Reactions

    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-)

    SIMC is NOT

    • 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

    Overview

    An overview of SIMC can be found in this presentation at the 2009 Hall A Collaboration Meeting

    Documentation

    For more information, see the SIMC Monte Carlo page in the Hall C Wiki