some estimation

PVDIS

50uA, 
LH target, 40cm, 0.071g/cm3, X=50/890.4=4.5e-2, Lumi=50e-6/1.6e-19*40*0.071*6.02e23=0.53e39/cm2/s 
LD target, 40cm, 0.169g/cm3, X=50/745.4=5.4e-2, Lumi=50e-6/1.6e-19*40*0.169*6.02e23=1.27e39/cm2/s
Al window, 2*100um, density 2.7g/cm3, X=2*100e-4/8.897=2.25e-3, Lumi=50e-6/1.6e-19*2*100e-4*2.7*6.02e23=1e37/cm2/s

SIDIS 3he

15uA
3he(10amg), 40cm, density=10*44.6(amg=mol/m3)*3.016(g/mol)=1.345e-3g/cm3, X=40/(67.42/1.345e-3)=0.8e-3, Lumi=15e-6/1.6e-19*40*1.345e-3*6.02e23=3e36/cm2/s
GE180 glass window, 2*120um, density 2.76g/cm3, X=2*120e-4/(19.4/2.76)=3.4e-3, Lumi=15e-6/1.6e-19*2*120e-4*2.76*6.02e23=3.7e36/cm2/s
beam path material: cell glass GE180 1mm(X=0.014), CC windows Al 6*0.02cm(X=0.013), MRPC glass 0.8cm(X=0.065)

SIDIS proton

100nA
NH3

JPsi

3uA
LH target, 15cm, 0.071g/cm3, X=15/890.4=1.7e-2, Lumi=3e-6/1.6e-19*15*0.071*6.02e23=1.2e37/cm2/s
Al window, 2*100um, density 2.7g/cm3, X=2*100e-4/8.897=2.25e-3, Lumi=3e-6/1.6e-19*2*100e-4*2.7*6.02e23=6e35/cm2/s

tool "background"

The code is in SVN at https://jlabsvn.jlab.org/svnroot/solid/solid_gemc/analysistool/background

The result is here http://hallaweb.jlab.org/12GeV/SoLID/download/sim/background

*.root is from GEMC, *.txt is all FLUX banks output from *.root, background.C runs on *.txt to produce *_output.root which has rate and Eflux on all detectors

   histogram "Eklog_R_hitid_pid" shows rate(kHz/mm2) at R(cm) and log10(Ek)(GeV) at different detector and for different particles
   pid=0   photon+electron+positron
       1   photon    
       2   electron + positron
       3   neutron
       4   proton
       5   pip
       6   pim
       7   Kp
       8   Km
       9   Kl
      10   other
  hitid=0 - 5  GEM plane 1 - 6
        6       lightgas CC 
        7       heavygas CC 
        8 - 11  FAEC front,middle,inner,rear 
        12 -15  LAEC front,middle,inner,rear 
        16 - 17 MRPC front,within