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1 Detector for Internally Reflected Cerenkov Light.

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Presentation on theme: "1 Detector for Internally Reflected Cerenkov Light."— Presentation transcript:

1 1 Detector for Internally Reflected Cerenkov Light

2 2 RICH dappertutto Physics Topic Examples: Exciting Issues (2004) Some Experiments with RICH; Active/ Future: (and without RICH/ Č det) Heavy Flavor Physics Confronting the Standard Model: Confronting the Standard Model: Precision Measurements of CP Violation in B Sector; Are there experimental hints of New Physics? Are there experimental hints of New Physics? BaBar(SLAC), BELLE(KEK), CLEO-III(Cornell), CKM, SELEX, LHCb (CERN); Super B-Factory (SLAC/KEK?) Hadron Structure Do Pentaquarks exist? Do Pentaquarks exist? Do other exotic hadrons exist? Do other exotic hadrons exist? What is quark content of new states? E.g., D s J [2317]; D s J [2460]; D s J [2632](SELEX); X(3872) What is quark content of new states? E.g., D s J [2317]; D s J [2460]; D s J [2632](SELEX); X(3872) Many of the Heavy Flavor Experiments above; HERMES(DESY); COMPASS(CERN); (SELEX(Fermilab)) GSI: PANDA, CBM HALL-A (JLAB) Neutrino Physics First Confirmed Physics Beyond SM First 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 Astrophysics Neutrino Astrophysics Super Kamiokande; SNO(Sudbury); Lake Baikal; Ice Cube(South Pole); Antares, NESTOR, NEMO (Mediterranean) tabella di B. Ratcliff – RICH2004 (con qualche aggiunta)

3 3 tabella di B. Ratcliff – RICH2004 (con qualche aggiunta) E chi non lo ha se ne penta Physics Topic Examples: Exciting Issues (2004) Some Experiments with RICH; Active/ Future: (and without RICH/ Č det.) Quark Matter at High Density (Heavy Ions) Discovery of Quark-Gluon Plasma HADES(GSI)PHENIX(RHIC)STAR(RHIC) ALICE (CERN) High Energy Frontier Discovery! Higgs?; Higgs?; Supersymmetry? Supersymmetry? CDF/D0(Fermilab) ATLAS/CMS(LHC) Astro-particle physics Ultra High Energy Cosmic Rays; Ultra High Energy Cosmic Rays; Very High Energy Gamma Rays; Very High Energy Gamma Rays;AMS-02(Space) Auger (Argentina) HESS (Namibia); Puebla TUNKA (Siberia) Mexico/Chalcataya Magic (la Palma)

4 4 Formule Richiami sulleffetto Cherenkov. Se la velocità della luce in un mezzo v è > 1/n, allora si forma un cono di luce di apertura: c c

5 5 Il principio

6 6 Risoluzione intrinseca

7 7 Considerazioni sulla risoluzione

8 8 Pinhole

9 9 DIRC-Schematica

10 10

11 11

12 12 Efficienze

13 13 PMT in H 2 O

14 14 Radiatore

15 15 Quarzi !

16 16 Tolleranze

17 17 Coefficiente di riflessione vs. finitura

18 18 QC/QA

19 19 Trasmissione

20 20 PMT

21 21 Lacqua corrode

22 22 Lacqua corrode e si vede

23 23 Alla fine …..conta lefficienza per i fotoni dimuoni

24 24 Risoluzione angolare e temporale

25 25 Ricostruzione e background dimuone Time information (8 ns window )

26 26 Tracce vere

27 27 Risoluzione sulla traccia 2.5 mrad

28 28 Performance a vista D 0 -> K + -

29 29 Performance in funzione di p

30 30 E in dettaglio

31 31 E nel caso piu critico Crossfeed /k in B->K( B->K(

32 32 DIRC DI SECONDA GENERAZIONE: IL TOP 1/2 TOP Counter Concept Quartz-based RICH counter to detect Quartz-based RICH counter to detect internally reflected Cherenkov light (like DIRC at BaBar) But reconstruct the image in (X,TOP) But reconstruct the image in (X,TOP) instead of (X,Y). TOP = Time Of Propagation Possible if Possible if TOP < 100ps for each arriving photon. TOP < 100ps for each arriving photon. Toru Iijima butterfly TOP J. Vavra

33 33 DIRC DI SECONDA GENERAZIONE: 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 TOP 3D information t, x and vertical angle Toru Iijima J. Vavra

34 34 Un Super-DIRC per Super-B

35 35 FLAT PANELS Belle upgrade, test beam matrix of flat panels, Hammamatsu H8500 P. Krizan J. Vavra uniformity is ~1:2.5

36 36 Propagazione della luce


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