solid ec update
DESCRIPTION
SoLID EC Update. Zhiwen Zhao,UVa for EC group . What’s new. PVDIS Using background produced with 1 st plane baffle inner radius at 4cm (change from 2cm) which reduces low energy photons to about half, thus we have lower radiation dose and better e- efficiency and pi rejection - PowerPoint PPT PresentationTRANSCRIPT
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SoLID EC UpdateZhiwen Zhao,UVa
for EC group
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PVDIS ◦ Using background produced with 1st plane baffle
inner radius at 4cm (change from 2cm) which reduces low energy photons to about half, thus we have lower radiation dose and better e- efficiency and pi rejection
◦ Trigger study SIDIS
◦ forward angle EC moves back 10cm to make room for HGCC which doesn’t affect EC performance.
Layout Cost update
8/19/2013
What’s new
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PVDIS Updated radiation dose VS layers (High radiation φ slice)
3rd Update New: 4th Update
8/19/2013
Direct Pi0 γ
Soft EM γ
• Photon (EM) <- dominant!• Photon (Pi0)• Electron• Pion- Pion+ Proton Improve by two-
fold
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PVDIS Update on PID Mid radius, higher γ φ-band shownOther configuration also simulated
Pion Efficiency Electron Efficiency
Improvement Improvem
ent
Update
8/19/2013
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58/19/2013
PVDIS EC Performance
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PVDIS EC Trigger Effect
8/19/2013
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PVDIS Rate on EC
8/19/2013
before trigger after trigger at 2GeV
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EM Calorimeter(large angle)
EM Calorimeter(forward angle)
Target
GEM
Light GasCherenkov
Heavy GasCherenkov
Coil and Yoke
MRPC
Collimator
SoLID CLEO SIDIS
Collimator
Hadron
Scattered electron
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98/19/2013
SIDIS EC Performance
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108/19/2013
Layout: forward angle EC (FAEC)from ANL
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SoLID Collaboration Meeting
Budget Estimate Update
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SoLID Collaboration Meeting, May 2013 12
IHEP (not including fibers) for 1700 PS+SHPreshower: $112k-$120kShower: $549k-$651kStructure+assembly: $255k-$340kIHEP total: ($1.22-$1.51)M + 24% overhead (2012 rate) = ($1.51-$1.87)M
Fiber connectors+tubing (Leoni+other): ~$300kWLS+clear fibers with diamond-cutting: $777k+$448k (S.G.) - $1.66M (Kuraray)PMTs: $640x2x(~1900)=$2.43MTotal from above (no contingency): ($5.3M-$5.7M) if using S.G.Labor? Shipping? Contingency?
Cost @ May 2013 Meeting
correction: this should be “structure and assembly
each”, but does not affect total IHEP $ on this page.
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SoLID Collaboration Meeting
Cost @ May 2013 Meeting
Based on 1700 modules
No quote yet for SPD
No quote yet for Shower fiber mirrors (IHEP)
Updated fiber cost with diamond-tool cutting (do not know yet if IHEP can cut the fibers)
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SoLID Collaboration Meeting
Cost Update
Will be based on 1800 modules;
SPD quote: $(40-70)k (IHEP very rough estimate)
Quote for WLS fiber cutting, polishing, adding mirrors (IHEP): $50/piece a few years ago, now (20-30)% higher → $(108-117)k
Need to order all WLS fibers in spools and ship to IHEP, need (10-15)% longer length to allow cutting.
We still need to cut the other end of WLS fibers and all clear fibers (CLAS12 cutters).
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SoLID Collaboration Meeting
IHEP (not including fibers) for 1800 PS+SHPreshower: $113k-$122kShower: $570k-$678kStructure+assembly: $540k-$720kFiber cutting + mirrors: $108k-$117kIHEP total: ($1.38-$1.70)M + 30% overhead (changed from 24% for a conservative estimate) = ($1.80-$2.21)M
Fiber connectors+tubing (Leoni+other): ~$300kWLS+clear fibers (S.G), rough ends: $234k+$564kPMTs: $640x2x(~1900)=$2.43MTotal from above (no contingency): ($5.33M-$5.74M)Labor ($0.75M)? Shipping ($0.5M)? Contingency (30%): → $8.6M - $9.2M
Cost Update
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SoLID Collaboration Meeting, May 2013 16
Plan to reduce cost:MAPMT study, now it's clear can do gain-matching at the FADC level. Any need for small-scale tests? – potential saving of up to $800k;Get a MAPMT quote;Customized PMT bases? (current base cost is $912k);Smaller PMTs for Preshower?
Plan for Budgeting
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SoLID Collaboration Meeting, May 2013 17
Possible Design Update – Multi-Anode PMTsCurrent Preshower readout: 1 PMT ($600)/module, but each module is read out by only a couple of fibers so we are wasting cross-sectional area of the PMT;MAPMT: about $100/channel → potential saving of PS PMT from $1.02M to $200k;To be studied: gain-matching between channels of one MAPMT. LHCb used specialized front-end electronic modules to produce digital triggers. We could use FADC directly, no need for FE-electronics.
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188/19/2013
Backup
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Cited from March collaboration Meeting
8/19/2013
EC performance w/o background
Preshower ID power
drop significantly at this bin
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Forth update of CLEO background
Cutting 2cm away on 1st baffle inner radius Received background simulation from Zhiwen on May 24
8/19/2013
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218/19/2013
Updated: Per-event pion rate for 1+6 hexagon cluster at Mid radius, high radiation φ-slice
• Electron (mostly absorbed in Pb)• Pion- • Pion+
3rd Update
New 4th Update
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Trigger turn on curve for 2 GeV electronShower Hex 1+6 trigger > 1.6 GeV
Pion Efficiency Electron Efficiency
Outer radius, higher γ φ-band, full bgd
Middle radius, higer γ φ-band, full bgd, full bgd
100% pass for ~250
events/bin
Physics
Physics
8/19/2013
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Physics
Physics
Trigger turn on curve for 2.5 GeV electronShower Hex 1+6 trigger > 2.1 GeV
Pion Efficiency Electron Efficiency
Middle radius, higher γ φ-band, full bgd
Inner radius, higer γ φ-band, full bgd
8/19/2013
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248/19/2013
Readout occupancy per shower channel for ~75MeV zero suppression
• High radiation phi slice • Low radiation phi slice
Improvement
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258/19/2013
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Third update of CLEO background
Received background simulation from Zhiwen on May 19Running background imbedding
8/19/2013
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278/19/2013
Background imbedding and distribution Mid-R, High Radiation phi slice
• Photon (6GHz/6+1 Hex cluster)• Electron• Pion- Pion+ Proton
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288/19/2013
Updated: Per-event pion rate for 1+6 hexagon cluster at Mid radius, high radiation φ-slice
• Electron (mostly absorbed in Pb)• Pion- • Pion+
+ 6 GHz photon not shown (3GHz for lower φ-radiation )
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Update on PID with DC component removal (PS > MIP + Bgd + (2-3) σ)
Pion Efficiency Electron Efficiency
Outer radius, higher γ φ-band
Outer radius, lower γ φ-band
Due to Soft EM
γ
8/19/2013
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Update on PID with DC component removal (PS > MIP + Bgd + (2-3) σ)
Pion Efficiency Electron Efficiency
Outer radius, higher γ φ-band
Mid radius, higher γ φ-band
Due to Hadron
rate
8/19/2013
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More detail in PID cutMiddle radius, lower γ φ-band, full bgd
Pion Efficiency Electron Efficiency
8/19/2013
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Update on PID with DC component removal (PS > MIP + Bgd + (2-3) σ)
Pion Efficiency Electron Efficiency
Inner radius, higher γ φ-band
Inner radius, lower γ φ-band
8/19/2013
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Trigger turn on curve for 2 GeV electronShower Hex 1+6 trigger > 1.6 GeV
Pion Efficiency Electron Efficiency
Inner radius, higher γ φ-band, full bgd
Middle radius, higer γ φ-band, full bgd, full bgd
100% pass for ~250
events/binPhysics
Physics
8/19/2013
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Physics
Physics
Trigger turn on curve for 2.5 GeV electronShower Hex 1+6 trigger > 2.1 GeV
Pion Efficiency Electron Efficiency
Middle radius, higher γ φ-band, full bgd
Outer radius, higer γ φ-band, full bgd
8/19/2013
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More detail in trigger cutMiddle radius, higher γ φ-band, full bgdShower Hex 1+6 trigger > 2.1 GeV
Pion Efficiency Electron Efficiency
8/19/2013
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368/19/2013
Readout occupancy per shower channel for ~75MeV zero suppression
• High radiation phi slice • Low radiation phi slice