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| Line 11: |
Line 11: |
| | [[Image:Emflux.png]] | | [[Image:Emflux.png]] |
| | | | |
| − | = Single particle inclusive production (outdated, done with incorrect baffles, bad pion generator) = | + | = SIDIS Geant4 modeled background from Target = |
| | | | |
| − | 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.
| + | [[Image:Sidisgem.png]] |
| − | | + | |
| − | == How it has been done in the proposals==
| + | |
| − | | + | |
| − | == current study ==
| + | |
| − | | + | |
| − | === approach ===
| + | |
| − | | + | |
| − | === result of SIDIS for BaBar configuration===
| + | |
| − | | + | |
| − | {| Border = "1"
| + | |
| − | !
| + | |
| − | ! eDIS Cut
| + | |
| − | ! eDIS NoCut
| + | |
| − | ! pi- Cut
| + | |
| − | ! pi- NoCut
| + | |
| − | ! pi+ Cut
| + | |
| − | ! pi+ NoCut
| + | |
| − | |-
| + | |
| − | !rate at forward angle EC (Hz)
| + | |
| − | !63k
| + | |
| − | !63k
| + | |
| − | !4.9M
| + | |
| − | !11M
| + | |
| − | !5.7M
| + | |
| − | !13M
| + | |
| − | |-
| + | |
| − | !rate at large angle EC (Hz)
| + | |
| − | !3.3k
| + | |
| − | !19k
| + | |
| − | !9.6k
| + | |
| − | !20M
| + | |
| − | !9.1k
| + | |
| − | !24M
| + | |
| − | |-
| + | |
| − | !Energy Flux at forward angle EC (GeV/10cm2/s)
| + | |
| − | !
| + | |
| − | |-
| + | |
| − | !Energy Flux at large angle EC (GeV/10cm2/s)
| + | |
| − | |}
| + | |
| − | | + | |
| − | * note
| + | |
| − | ** eDIS means DIS electron which require W>2GeV and Q2>1(GeV)^2
| + | |
| − | ** 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].
| + | |
| − | ** 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
| + | |
| − | | + | |
| − | === result of PVDIS for BaBar configuration===
| + | |
| − | | + | |
| − | | + | |
| − | {| Border = "1"
| + | |
| − | !
| + | |
| − | ! eDIS (Open)
| + | |
| − | ! pi- (Open)
| + | |
| − | ! pi+ (Open)
| + | |
| − | ! eDIS (baffled)
| + | |
| − | ! pi- (baffled)
| + | |
| − | ! pi+ (baffled)
| + | |
| − | |-
| + | |
| − | !rate at forward angle EC (Hz)
| + | |
| − | !3M
| + | |
| − | !5775M
| + | |
| − | !11697M
| + | |
| − | !350k
| + | |
| − | !64M
| + | |
| − | !110M
| + | |
| − | |-
| + | |
| − | !Energy Flux at forward angle EC (GeV/10cm2/s) (total,peak)
| + | |
| − | !573, 25
| + | |
| − | !4e5,1e4
| + | |
| − | !7.6e5,2e4
| + | |
| − | !120,6
| + | |
| − | !6700,300
| + | |
| − | !1663,100
| + | |
| − | |}
| + | |
| − | * note
| + | |
| − | ** eDIS means DIS electron which require W>2GeV and Q2>1(GeV)^2
| + | |
| − | ** comparing to PVDIS rate table in proposal at page 40 of [http://hallaweb.jlab.org/collab/PAC/PAC34/PR-09-012-pvdis.pdf]
| + | |
| − | ** Energy Flux drops quickly with R, the peak value at lowest R
| + | |
| − | | + | |
| − | = EM energy flux on EC (outdated) =
| + | |
| − | * geant3 has EM process total energy cut at 1MeV
| + | |
| − | * Both SIDIS and PVDIS have confirmed energy flux on EC by the genat3 simulation in the proposals.
| + | |
| − | * geant4 geometry and materiel checked, no simple mistake found.
| + | |
| − | * with energy cut on 1MeV, SIDIS geant4 result is close SIDIS geant3, but PVDIS geant4 is still one order larger than PVDIS geant3.
| + | |
| − | * More careful study like particle type, hit processing under way.
| + | |
| − | | + | |
| − | [[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)]] | + | |
| − | [[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)]]
| + | |
| − | | + | |
| − | | + | |
| − | | + | |
| − | <br clear="all">
| + | |
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.
