Difference between revisions of "Solid Background"

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= PVDIS Geant4 modeled background from Target =
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This page has been moved to [https://solid.jlab.org/wiki/index.php/Background https://solid.jlab.org/wiki/index.php/Background] in the new [https://solid.jlab.org/wiki SoLID Wiki].  Please do not edit this page.
  
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Rates and flux from GEMC for PVDIS follow.  Validation against GEANT3 can be found here: [[Compare_to_geant3_result]].
 
  
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Rates on GEMs for 50uA on LH2.  Solid lines are unbaffled, dashed are with lead baffles:
 
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[[Image:Geant4 truegemrate.png|400px]]
 
  
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Flux in EM calorimeter for 50uA on LH2.  Solid lines are unbaffled, dashed are with lead baffles:
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= rate =
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[[Image:Emflux.png|400px]]
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= Single particle inclusive production (outdated) =
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The result is at /work/halla/solid/evgen
  
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Single particle inclusive production can be signal or background depends on what the studied physics is. But it always add into radiation dose taken by detectors.
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== SIDIS e and hadron rate ==
  
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== How it has been done in the proposals==
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generated by "collider", the code and script for analyzing result are at
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https://jlabsvn.jlab.org/svnroot/solid/evgen/collider
  
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== current study ==
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The result is here
  
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=== approach ===
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== single particle rate ==
  
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=== result of SIDIS for BaBar configuration===
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various particle from vertex is estimated by "eicRate" in our event generator repository.
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The code and script for analyzing result are at
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https://jlabsvn.jlab.org/svnroot/solid/evgen/eicRate_20101102
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https://jlabsvn.jlab.org/svnroot/solid/evgen/eicRate_20101102/output
  
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{| Border = "1"
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== rate study ==
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!
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! eDIS Cut
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! eDIS NoCut
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! pi- Cut
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! pi- NoCut
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! pi+ Cut
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! pi+ NoCut 
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|-
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!rate at forward angle EC (Hz)
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!63k 
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!63k
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!4.9M
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!11M
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!5.7M
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!13M
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|-
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!rate at large angle EC (Hz)
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!3.3k
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!19k
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!9.6k
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!20M
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!9.1k
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!24M 
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|-
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!Energy Flux at forward angle EC (GeV/10cm2/s)
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!
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|-
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!Energy Flux at large angle EC (GeV/10cm2/s)
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|}
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* note
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[http://hallaweb.jlab.org/12GeV/SoLID/download/sim/talk/transversity_rate_comparison.pdf pdf] Comparison with 6GeV transversity data by Xin Qian
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** eDIS means DIS electron which require W>2GeV and Q2>1(GeV)^2
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** the cut (E>0.9GeV for forward angle EC, E>3.5GeV for large angle EC) is to match SIDIS physics and trigger condition, refer to SIDIS rate estimation at page 48 of [http://hallaweb.jlab.org/collab/PAC/PAC35/PR-10-006-SoLID-Transversity.pdf].
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** When use the result with the cut to compare to SIDIS rate table in proposal, please note SIDIS has a correction factor 2 based on data comparison, refer to page 66 of [http://hallaweb.jlab.org/collab/PAC/PAC35/PR-10-006-SoLID-Transversity.pdf]. So assume the correction is good for all pion calculated from Wiser, all numbers for pions in the table should divided by 2
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=== result of PVDIS for BaBar configuration===
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[http://hallaweb.jlab.org/12GeV/SoLID/download/sim/talk/rate_comparison_zwzhao_20131204.pptx pptx] [http://hallaweb.jlab.org/12GeV/SoLID/download/sim/talk/rate_comparison_zwzhao_20131204.pdf pdf] event generator rate comparison, study by Zhiwen Zhao and Zhihong Ye
  
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[http://hallaweb.jlab.org/12GeV/SoLID/download/sim/talk/wiser_table.pdf pdf] study by Nguyen Ton and Xiaochao Zheng (outdated)
  
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{| Border = "1"
 
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!
 
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! eDIS (Open)
 
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! pi- (Open)
 
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! pi+ (Open)
 
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! eDIS (baffled)
 
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! pi- (baffled)
 
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! pi+ (baffled)
 
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|-
 
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!rate at forward angle EC (Hz)
 
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!3M
 
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!5775M
 
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!11697M
 
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!350k
 
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!64M
 
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!110M
 
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|-
 
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!Energy Flux at forward angle EC (GeV/10cm2/s) (total,peak)
 
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!573, 25
 
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!4e5,1e4
 
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!7.6e5,2e4
 
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!120,6
 
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!6700,300
 
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!1663,100
 
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|}
 
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* note
 
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** eDIS means DIS electron which require W>2GeV and Q2>1(GeV)^2
 
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** comparing to PVDIS rate table in proposal at page 40 of [http://hallaweb.jlab.org/collab/PAC/PAC34/PR-09-012-pvdis.pdf]
 
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** Energy Flux drops quickly with R, the peak value at lowest R
 
  
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= EM energy flux on EC (outdated) =
 
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* geant3 has EM process total energy cut at 1MeV
 
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* Both SIDIS and PVDIS have confirmed energy flux on EC by the genat3 simulation in the proposals.
 
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* geant4 geometry and materiel checked, no simple mistake found.
 
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* with energy cut on 1MeV, SIDIS geant4 result is close SIDIS geant3, but PVDIS geant4 is still one order larger than PVDIS geant3.
 
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* More careful study like particle type, hit processing under way.
 
  
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[[Image:solid_BaBar_SIDIS_background_vertex.png|thumb|600px|left|solid_BaBar_SIDIS_background_vertex of hits on forward EC (top:electron, middle:photon,bottom:others)]]
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= other staff =
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[[Image:solid_BaBar_PVDIS_nobaffle_background_vertex.png|thumb|600px|left|solid_BaBar_PVDIS_nobaffle_background_vertex of hits on forward EC(top:electron, middle:photon,bottom:others)]]
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== 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:
 +
 
 +
[[Image:Geant4 truegemrate.png]]
 +
 
 +
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.
  
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[[Image:Emflux.png]]
  
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== SIDIS Geant4 modeled background from Target ==
  
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<br clear="all">
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[[Image:Sidisgem.png]]
  
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= rate on GEM =
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== <math>\pi</math>/e Ratio ==
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* rate on GEM need more study, particular from photon-induced rate, SBS has more mature simulation tested with data, their photon-induced rate is about twice of electron rate, need to learn from them.
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See [[Solid_pi_e_ratio | here]]

Latest revision as of 15:39, 7 December 2020

This page has been moved to https://solid.jlab.org/wiki/index.php/Background in the new SoLID Wiki. Please do not edit this page.


rate

The result is at /work/halla/solid/evgen

SIDIS e and hadron rate

generated by "collider", the code and script for analyzing result are at https://jlabsvn.jlab.org/svnroot/solid/evgen/collider

The result is here

single particle rate

various particle from vertex is estimated by "eicRate" in our event generator repository. The code and script for analyzing result are at https://jlabsvn.jlab.org/svnroot/solid/evgen/eicRate_20101102 https://jlabsvn.jlab.org/svnroot/solid/evgen/eicRate_20101102/output

rate study

pdf Comparison with 6GeV transversity data by Xin Qian

pptx pdf event generator rate comparison, study by Zhiwen Zhao and Zhihong Ye

pdf study by Nguyen Ton and Xiaochao Zheng (outdated)


other staff

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:

Geant4 truegemrate.png

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.

Emflux.png

SIDIS Geant4 modeled background from Target

Sidisgem.png

<math>\pi</math>/e Ratio

See here

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