Tungsten-Silicon Luminosity Detector with Flat Geometry
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Tungsten-Silicon Luminosity
Detector with Flat Geometry
Ronen Ingbir
Tel Aviv University High Energy Physics Experimental Group Tel Aviv University High Energy Physics Experimental Group
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Detector Design
0.34 cm Tungsten
0.31 cm Silicon
Cell Size
1cm*1cm
1 Radiation length
1 Radius Moliere
Tel Aviv University High Energy Physics Experimental Group Tel Aviv University High Energy Physics Experimental Group
15 cylinders * 24 sectors * 30 rings = 10800 cells
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Tel Aviv University High Energy Physics Experimental Group
Detector placement
Tel Aviv University High Energy Physics Experimental Group
3.05 m
8 cm
28 cm
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Tel Aviv University High Energy Physics Experimental Group
Shower position Readout
Cylinders position (cm) Rings position (cm) Sectors position (deg)
Tel Aviv University High Energy Physics Experimental Group
250 GeV
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Bhabha Scattering
Tel Aviv University High Energy Physics Experimental Group
BHWIDE MC Simulation
e
e+
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Tel Aviv University High Energy Physics Experimental Group
Bhabha MC output
Tel Aviv University High Energy Physics Experimental Group
Photon Number
Photon Energy (GeV)
Positron Energy (GeV)
Electron Energy (GeV)
Mean = 2.3
250 GeV
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Tel Aviv University High Energy Physics Experimental Group
Detector Simulation
Tel Aviv University High Energy Physics Experimental Group
Barbie -Geant 3.21 which includes detector description for Tesla
detector
The MC of physical process is the output of bhabha scattering
The Barbie program was given us by
Leszek Suszycki
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Tel Aviv University High Energy Physics Experimental Group Tel Aviv University High Energy Physics Experimental Group
100 GeV
250 GeV
Mean 312.9
Mean 312.5
Z rec (cm)
Z rec (cm)
Mean 313.2
400 GeV
Shower Z profile
Z rec (cm)
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Tel Aviv University High Energy Physics Experimental Group
Detector Energy Readout
Tel Aviv University High Energy Physics Experimental Group
100 GeV
250GeV
400 GeV
Cut = Beam Energy * 0.014
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Tel Aviv University High Energy Physics Experimental Group
Energy Resolution & Calibration
Tel Aviv University High Energy Physics Experimental Group
EE %40
Beam energy = 62.32 * Detector Energy + 0.36
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Tel Aviv University High Energy Physics Experimental Group
Angular weighting
Tel Aviv University High Energy Physics Experimental Group
i
ii
E
EXX
i
ii
W
WXX
)]}ln([,0max{T
ii E
EconstW
Rec - Gen (rad) Rec - Gen(deg) Mean 0.2961E-03
Sigma 0.5809E-03
Mean –0.2361
Sigma 3.240
Mean 0.0975E-04
Sigma 0.2167E-03
Mean –0.7009
Sigma 1.917
250 GeV
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Tel Aviv University High Energy Physics Experimental Group Tel Aviv University High Energy Physics Experimental Group
Angular Resolution
0.2E-03
0.035
)(
)(
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Tel Aviv University High Energy Physics Experimental Group
Acceptance with old geometry
Tel Aviv University High Energy Physics Experimental Group
Acceptance >30mrad
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Tel Aviv University High Energy Physics Experimental Group
Cuts with New Geometry and bhabha MC
Tel Aviv University High Energy Physics Experimental Group
En
ergy
(G
ev)
En
ergy
(G
ev)
250 GeV
No cuts energy and angle cuts
gen (rad)
rec (rad)
gen (rad)
rec (rad)
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Tel Aviv University High Energy Physics Experimental Group
New Acceptance
28 mrad
Tel Aviv University High Energy Physics Experimental Group
Rec - Gen
Rec
Gen
Gen (rad)
Rec
(ra
d)
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Tel Aviv University High Energy Physics Experimental Group
Detector depth
Tel Aviv University High Energy Physics Experimental Group
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Tel Aviv University High Energy Physics Experimental Group
Optimization
Tel Aviv University High Energy Physics Experimental Group
Num. Cylinders
14
28
56
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Tel Aviv University High Energy Physics Experimental Group
Background studies
Tel Aviv University High Energy Physics Experimental Group
we included in the BHWIDE a background simulation routine called CIRCE. This was suggested to us by K. Moning
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Tel Aviv University High Energy Physics Experimental Group Tel Aviv University High Energy Physics Experimental Group
Background-1
1%
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Tel Aviv University High Energy Physics Experimental Group
Background-2
Tel Aviv University High Energy Physics Experimental Group
Num Photons =1.9
1%
3%
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Tel Aviv University High Energy Physics Experimental Group
Background-3
Tel Aviv University High Energy Physics Experimental Group
Pos(rad)
Ele(rad)
Pos(rad)
Ele(rad)
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Tel Aviv University High Energy Physics Experimental Group Tel Aviv University High Energy Physics Experimental Group
Background-4
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Next Steps..…
A. Analyses of detector + background MCB. Cross checks in Geant 4C. Energy and Angular resolution improvement.
Tel Aviv University High Energy Physics Experimental Group
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Tel Aviv University High Energy Physics Experimental Group Tel Aviv University High Energy Physics Experimental Group