Difference between revisions of "Solid Background"
From Hall A Wiki
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= some estimation = | = some estimation = | ||
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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 | 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 | 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 R(cm) VS 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 | ||
= PVDIS Geant4 modeled background from Target = | = PVDIS Geant4 modeled background from Target = | ||
Revision as of 10:01, 21 March 2013
Contents
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
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 R(cm) VS 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
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
