1 Detector for Internally Reflected Cerenkov Light.
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Transcript of 1 Detector for Internally Reflected Cerenkov Light.
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Detector for Internally Detector for Internally Reflected Cerenkov LightReflected Cerenkov Light
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RICH dappertuttoRICH dappertuttoPhysics Topic Physics Topic Examples: Exciting Issues (2004)Examples: Exciting Issues (2004) Some Experiments with Some Experiments with
RICH; RICH; Active/ Active/ Future:Future:
(and(and without RICH/without RICH/ČČ det)det)
Heavy Flavor PhysicsHeavy Flavor Physics • Confronting the Standard Model:Confronting the Standard Model:
Precision Measurements of CP Precision Measurements of CP Violation in B Sector; Violation in B Sector; • Are there experimental hints of New Are there experimental hints of New Physics?Physics?
BaBar(SLAC)BaBar(SLAC), , BELLE(KEK),BELLE(KEK), CLEO-CLEO-III(Cornell), CKM, III(Cornell), CKM, SELEX, SELEX, LHCb (CERN); LHCb (CERN); Super B-Factory Super B-Factory (SLAC/KEK?)(SLAC/KEK?)
Hadron StructureHadron Structure • Do Pentaquarks exist?Do Pentaquarks exist?• Do other exotic hadrons exist? Do other exotic hadrons exist? • What is quark content of new states? What is quark content of new states? E.g., DE.g., DssJJ[2317]; D[2317]; DssJJ[2460]; D[2460]; DssJJ[2632][2632](SELEX); X(3872)(SELEX); X(3872)
Many of the Heavy Many of the Heavy Flavor Experiments Flavor Experiments above;above; HERMES(DESY);HERMES(DESY); COMPASS(CERN); COMPASS(CERN); (SELEX(Fermilab))(SELEX(Fermilab))
GSI: PANDA, CBMGSI: PANDA, CBM
HALL-A (JLAB)HALL-A (JLAB)
Neutrino PhysicsNeutrino Physics • First Confirmed Physics Beyond SMFirst Confirmed Physics Beyond SM• Are neutrinos Dirac or Majorana? Are neutrinos Dirac or Majorana? • What is the mass hierachy?What is the mass hierachy?• Neutrino AstrophysicsNeutrino Astrophysics
Super Kamiokande; Super Kamiokande; SNO(Sudbury); Lake SNO(Sudbury); Lake Baikal;Baikal;
Ice Cube(South Pole);Ice Cube(South Pole);
Antares, NESTOR, Antares, NESTOR, NEMONEMO
(Mediterranean)(Mediterranean)tabella di B. Ratcliff – RICH2004tabella di B. Ratcliff – RICH2004(con qualche aggiunta)(con qualche aggiunta)
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tabella di B. Ratcliff – RICH2004tabella di B. Ratcliff – RICH2004(con qualche aggiunta)(con qualche aggiunta)
E chi non lo ha se ne pentaE chi non lo ha se ne pentaPhysics Topic Physics Topic Examples: Exciting Issues Examples: Exciting Issues
(2004)(2004)Some Experiments with RICH; Some Experiments with RICH; Active/ Active/ Future:Future:
(and(and without RICH/without RICH/ČČ det.) det.)
Quark Matter at High Quark Matter at High Density (Heavy Ions)Density (Heavy Ions)
Discovery of Quark-Gluon Discovery of Quark-Gluon PlasmaPlasma
HADES(GSI) HADES(GSI)
PHENIX(RHIC)PHENIX(RHIC)
STAR(RHIC)STAR(RHIC)
ALICE (CERN)ALICE (CERN)
High Energy FrontierHigh Energy Frontier Discovery!Discovery!• Higgs?; Higgs?; • Supersymmetry?Supersymmetry?
CDF/D0(Fermilab)CDF/D0(Fermilab)ATLAS/CMS(LHC)ATLAS/CMS(LHC)
Astro-particle physicsAstro-particle physics • Ultra High Energy Cosmic Ultra High Energy Cosmic Rays;Rays;• Very High Energy Gamma Very High Energy Gamma Rays;Rays;
AMS-02(Space)AMS-02(Space)
Auger (Argentina)Auger (Argentina)
HESS (Namibia); HESS (Namibia);
Puebla Puebla
TTUUNNKKA (A (SSiibbeerriiaa))
Mexico/ChalcatayaMexico/Chalcataya
Magic (la Palma) Magic (la Palma)
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FormuleFormule
Richiami sull’effetto Cherenkov. Se la velocità della luce in un mezzo v èRichiami sull’effetto Cherenkov. Se la velocità della luce in un mezzo v è> 1/n, allora si forma un cono di luce di apertura: > 1/n, allora si forma un cono di luce di apertura:
cc
cc
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Il principioIl principio
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Risoluzione intrinsecaRisoluzione intrinseca
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Considerazioni sulla risoluzioneConsiderazioni sulla risoluzione
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PinholePinhole
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DIRC-SchematicaDIRC-Schematica
1010
1111
1212
EfficienzeEfficienze
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PMT in HPMT in H22OO
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RadiatoreRadiatore
1515
Quarzi !Quarzi !
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TolleranzeTolleranze
1717
Coefficiente di riflessione vs. Coefficiente di riflessione vs. finiturafinitura
1818
QC/QAQC/QA
1919
TrasmissioneTrasmissione
2020
PMTPMT
2121
L’acqua corrodeL’acqua corrode
2222
L’acqua corrode e si vedeL’acqua corrode e si vede
2323
Alla fine …..conta l’efficienza per i Alla fine …..conta l’efficienza per i fotonifotoni
dimuonidimuoni
2424
Risoluzione angolare e temporaleRisoluzione angolare e temporale
2525
Ricostruzione e backgroundRicostruzione e backgrounddimuonedimuone
Time information (8 ns windowTime information (8 ns window))
2626
Tracce vereTracce vere
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Risoluzione sulla tracciaRisoluzione sulla traccia
2.5 mrad2.5 mrad
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Performance a vistaPerformance a vista
DD00 -> K -> K++ --
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Performance in funzione di pPerformance in funzione di p
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E in dettaglioE in dettaglio
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E nel caso piu’ criticoE nel caso piu’ critico
Crossfeed Crossfeed /k in/k inB->K(B->K(
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DIRC DI SECONDA DIRC DI SECONDA GENERAZIONE: IL TOP 1/2GENERAZIONE: IL TOP 1/2
TOP Counter TOP Counter ConceptConcept
Quartz-based RICH counter to detect Quartz-based RICH counter to detect
internally reflected Cherenkov light internally reflected Cherenkov light
(like DIRC at BaBar)(like DIRC at BaBar) But reconstruct the image in (X,TOP) But reconstruct the image in (X,TOP)
instead of (X,Y).instead of (X,Y).
““TOP” = TOP” = Time Of PropagationTime Of Propagation Possible if Possible if
TOP < TOP < 100ps100ps for each arriving photon. for each arriving photon.
Toru Iijima
butterfly TOP butterfly TOP
J. Vavra
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DIRC DI SECONDA DIRC DI SECONDA GENERAZIONE: IL TOP 2/2GENERAZIONE: IL TOP 2/2
each photon will be measured with a ~100ps timing resolution, to correct out the chromatic error
the Focusing DIRC prototype is in the test beam at SLAC.
focusing TOPfocusing TOP3D information
t, x and vertical angle
Toru Iijima
J. Vavra
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Un Super-DIRC per Super-BUn Super-DIRC per Super-B
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FLAT PANELSFLAT PANELSBelle upgrade, test beamBelle upgrade, test beam
matrix of flat panels,matrix of flat panels,Hammamatsu H8500Hammamatsu H8500
P. Krizan P. Krizan
J. Vavra J. Vavra
uniformity is ~1:2.5
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Propagazione della lucePropagazione della luce