Difference between revisions of "Solid Background"
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3he(10amg), 40cm, density=1.345e-3g/cm3=10*44.6(amg=mol/m3)*3.016(g/mol), 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 | 3he(10amg), 40cm, density=1.345e-3g/cm3=10*44.6(amg=mol/m3)*3.016(g/mol), 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 | 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 | ||
| + | |||
| + | SIDIS proton | ||
| + | 100nA | ||
| + | NH3 | ||
JPsi | JPsi | ||
Revision as of 13:46, 15 November 2012
Contents
some estimation
PVDIS
50uA, LH target, 50cm, 0.071g/cm3, X=50/890.4=5.6e-2, Lumi=50e-6/1.6e-19*50*0.071*6.02e23=0.67e39/cm2/s LD target, 50cm, 0.169g/cm3, X=50/745.4=6.7e-2, Lumi=50e-6/1.6e-19*50*0.169*6.02e23=1.59e39/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=1.345e-3g/cm3=10*44.6(amg=mol/m3)*3.016(g/mol), 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
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
PVDIS Geant4 modeled background from Target
Rates and flux from GEMC for PVDIS follow. Validation against GEANT3 can be found here: Compare_to_geant3_result.
Rates on GEMs for 50uA on LH2. Solid lines are unbaffled, dashed are with lead baffles:
Flux in EM calorimeter for 50uA on LH2. Solid lines are unbaffled, dashed are with lead baffles. The true rate should be taken from the black lines.
SIDIS Geant4 modeled background from Target
<math>\pi</math>/e Ratio
See here
