od calorimetry study jaewon park university of rochester minerva/jupiter group meeting, mar 8, 2006
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![Page 1: OD Calorimetry Study Jaewon Park University of Rochester MINERvA/Jupiter Group Meeting, Mar 8, 2006](https://reader030.vdocuments.us/reader030/viewer/2022032521/56649d5f5503460f94a3f326/html5/thumbnails/1.jpg)
OD Calorimetry Study
Jaewon Park
University of Rochester
MINERvA/Jupiter Group Meeting, Mar 8, 2006
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Bethe-Bloch formula (Energy loss of charged particles)
22
2
2
420
)1(
2ln
4
I
mv
A
Z
mv
ezN
dx
dE
dE/dx is assumed constant in the calculation.
In actual case, it’ll be one source of nonlinearity
Different particle has different dE/dx. In particle shower it’ll combination of them.
![Page 3: OD Calorimetry Study Jaewon Park University of Rochester MINERvA/Jupiter Group Meeting, Mar 8, 2006](https://reader030.vdocuments.us/reader030/viewer/2022032521/56649d5f5503460f94a3f326/html5/thumbnails/3.jpg)
Total Energy Loss Calculation
scintscintmin
scintscintminiron
ironminscint
losstotalloss )(
)()(
L
LLEE
dxdE
dxdE
dxdE
scintLironL
particle
scintlossheight) (pluse E
iron scint
![Page 4: OD Calorimetry Study Jaewon Park University of Rochester MINERvA/Jupiter Group Meeting, Mar 8, 2006](https://reader030.vdocuments.us/reader030/viewer/2022032521/56649d5f5503460f94a3f326/html5/thumbnails/4.jpg)
Energy loss in each layer
particle
ID ECAL HCAL
Pb Fe
ldxActiveCa
ldxActiveCaaldxPassiveC)n()n( scint
losstotalloss
EE
n: layer number (n=0,...,4)
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Energy resolution
E (true)
E (measured)
true
truemeasured
E
EE
E
E
EE
E 1
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E_measured vs. E_true
![Page 7: OD Calorimetry Study Jaewon Park University of Rochester MINERvA/Jupiter Group Meeting, Mar 8, 2006](https://reader030.vdocuments.us/reader030/viewer/2022032521/56649d5f5503460f94a3f326/html5/thumbnails/7.jpg)
E_measured vs. E_true (1 OD layer)
![Page 8: OD Calorimetry Study Jaewon Park University of Rochester MINERvA/Jupiter Group Meeting, Mar 8, 2006](https://reader030.vdocuments.us/reader030/viewer/2022032521/56649d5f5503460f94a3f326/html5/thumbnails/8.jpg)
Energy resolution
Measured energy should collect all the energy? (y-intercept should be zero?)
E (measured)
E (true)
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Energy resolution
E (true) E (measured)
EE /
EE
E 1
EE /
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Resolution as # layer decrease, not calibrated( CC, QE, old geom, 5.2PE/MeV)
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Resolution decrease due to leakage ( CC, QE, old geom, 5.2PE/MeV)
![Page 12: OD Calorimetry Study Jaewon Park University of Rochester MINERvA/Jupiter Group Meeting, Mar 8, 2006](https://reader030.vdocuments.us/reader030/viewer/2022032521/56649d5f5503460f94a3f326/html5/thumbnails/12.jpg)
Resolution as # layer decrease, not calibrated ( CC, QE, new geom, 5.2PE/MeV)
![Page 13: OD Calorimetry Study Jaewon Park University of Rochester MINERvA/Jupiter Group Meeting, Mar 8, 2006](https://reader030.vdocuments.us/reader030/viewer/2022032521/56649d5f5503460f94a3f326/html5/thumbnails/13.jpg)
Resolution decrease due to leakage ( CC, QE, new geom, 5.2PE/MeV)