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dallatorre Workshop RICH2004

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Published on November 14, 2007

Author: Gavril

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Slide1:  S. Dalla Torre HIGH-LIGHTS DA argomenti selezionati: caratteristiche del Workshop(s) RICH ed esperimenti (presente e futuro) stato, innovazioni e prospettive della tecnologia il prossimo WORKSHOP IL WORKSHOP:  IL WORKSHOP workshop precedenti il sito di RICH2004 http://www.ifisica.uaslp.mx/rich2004/main.html partecipanti: 94 registrati sessioni, tutte plenarie, sui temi: (per un totale di 64 talk e 13 posters) il sito di RICH2004 L’ INFN @ RICH2004:  L’ INFN @ RICH2004 DAL PROGRAMMA SCIENTIFICO: la partecipazione italiana (8 contributi) VITALITA’ DEI RICH 1/2:  VITALITA’ DEI RICH 1/2 tabella di B. Ratcliff – RICH2004 (con qualche aggiounta) VITALITA’ DEI RICH 2/2:  tabella di B. Ratcliff – RICH2004 (con qualche aggiounta) VITALITA’ DEI RICH 2/2 PERCHE’ APPARATI SENZA RICH ALLE FRONTIERE DELL’ENERGIA ?:  PERCHE’ APPARATI SENZA RICH ALLE FRONTIERE DELL’ENERGIA ? non sembra esserci un golden channel che richieda PID anche se un buon PID puo’ ridurre il fondo combinatorio fornire sensibilita’ per segnali di nuova fisica rendere gli apparati ancor piu’ multipurpose il problema tecnico principale potrebbe venire dalla richiesta di ermeticita’ nel futuro, vedremo proposte come quella qui sotto diventare realta’? STAR Upgrades R&D Proposal (N. Smirnov - RICH2004): TPC e RICH integrati ! PROGRESSI TECNOLOGICI DEL RECENTE PASSATO:  PROGRESSI TECNOLOGICI DEL RECENTE PASSATO CSI-MWPCs in COMPASS [+ costruzioni per ALICE-HMPID] LHC-B Il DIRC di BABAR MAPMT per l’upgrade di COMPASS [+ studi per BTEV] AEROGEL: HERMES LHC-B AMS BELLE up-grade p p MAPMT per il RICH di AMS UNA CURIOSITA’ : IDENTIFICAZIONE DI IONI PESANTI:  UNA CURIOSITA’ : IDENTIFICAZIONE DI IONI PESANTI Nγ in the ring ~ Z2 - dopo CAPRIS e HIRICH, i test beam di AMS M. Buénerd C PROGRESSI TECNOLOGICI NOVITA’:  PROGRESSI TECNOLOGICI NOVITA’ fotorivelazione depositi fotosensibili e gas: il ruolo di ion feedback studi quantitativi con CsI fotorivelatori a gas: GEM & GEM-like + Cs fotorivelatori in vuoto: flat panels MCP - PMT radiatori gassosi (beyond C4F10) aerogel nuovi approcci TOP, focalized DIRC CsI MWPC – ION FEEDBACK:  CsI MWPC – ION FEEDBACK Results obtained with the VUV-scanner for 3 irradiation with different doses of accumulated charge identificazione del fenomeno dell’ion feed-back come il PROBLEMA dello CsI (H. Hoedlmoser) GEM e CsI 1/4:  GEM e CsI 1/4 RELATIVE QUANTUM EFFICIENCY FOR DIFFERENT GASES CsI semi-transparent photocathode CsI semi-transparent photocathode Photo cathode REFLECTIVE PHOTOCATHODE Photo cathode REFLECTIVE CsI PHOTOCATHODE: field dependence of Q.E. pushing for high DV !! reduced IFB reduced IFB Reflective PC (compared to ST), higher QE, low sensitivity to ionizing BG radiation - Reduced secondary effects  high gains 106 - 107 - Fast: with CF4 s = 1.6ns w\single electrons s = 0.33ns w\150 electrons A. Breskin GEM e CsI 2/4:  GEM e CsI 2/4 si pensa gia’ ad una applicazione: l’upgrade di Phenix HBD (Hadron Blind Detector): un contatore Cerenkov senza finestre HBD concept: ♣ Windowless Cherenkov detector (L=50cm) ♣ CF4 as radiator and detector gas ♣ CsI reflective photocathode ♣ Triple GEM with pad readout (I. Tserruya) GEM e CsI 3/4:  GEM e CsI 3/4 Real challenge: GPMTs for the visible range! Photocathodes(e.g. bi-alkali) are very chemically reactive. Cannot operate in flow-mode! Solution: Visible-range GPMTs => sealed mode Secondary avalanches due to ion feedback  gain limits, imaging problems (observed in K-Cs-Sb) Photocathode damage due to ion sputtering observed in both: CsI and K-Cs-Sb Major efforts to limit ion backflow MHSP: Microhole & Strip Plate A. Breskin GEM e CsI 4/4:  GEM e CsI 4/4 R. Chechik et al. Thick GEM-like multipliers (TGEM) : a simple solution for large area UV-RICH detectors manufactured by standard PCB techniques of precise drilling in G-10 (+ other materials) and Cu etching A TGEM costs ~4$ /unit. Gains: 105 with a single TGEM; 107 with cascaded double TGEM Fast signals: r.t. <10 ns. The e- transfer efficiency (into the holes) is well understood. Counting rate capability: ~ 106 avalnches/sec x mm2 @ gain 4x104 Ion backflow: study in course TGEMs of different materials (e.g. Kevlar, Teflon…) for CF4 ?. TGEM studied with transparent and reflective photocathode G-10 TGEMs tested with several gases. FLAT PANELS:  FLAT PANELS Belle upgrade, test beam matrix of flat panels, Hammamatsu H8500 P. Krizan J. Vavra uniformity is ~1:2.5 MCP-PMT 1/4:  MCP-PMT 1/4 Electron amplification in micro channel (f ~10mm) Fast/small transit time spread Gain saturation B field immunity Geometrical apperture ~ 60% Gain ~O(106) w/ 2-3 stages Possible to make a multi-anode PMT. Toru Iijima quando le richieste sono risoluzione temporale spinta operazione in campo magnetico HPK6 R3809U-50-11X BINP8 N4428 HPK10 R3809U-50-25X Burle25 85011-501 MCP - PMT 2/4:  MCP - PMT 2/4 Small chanel diam. Shows high stability against B-field Toru Iijima MCP-PMT w/ <10mm has excellent single photon counting performance up to 1.5 T Gain > 106 TTS < 35ps Unresolved issues: cross talk + Life time ! MCP-PMT 3/4 i multianodo:  MCP-PMT 3/4 i multianodo Under development HAMAMATSU: SL10 MCP-PMT Toru Iijima MCP-PMT 4/4 i multianodo:  MCP-PMT 4/4 i multianodo uniformity is ~1:1.5 J. Vavra RADIATORI GASSOSI:  RADIATORI GASSOSI C4F10 – non piu’ in produzione (3M) n ~ 1.0014 (il maggior n fra i fluorocarbori gassosi a T ambiente) C5F12 (minimo n fra i fluorocarburi liquidi a T ambiente) RICH in pressione o caldi BTeV investigation: gas C4F8O (n=1.0014) might be a viable replacement of C4F10 ? C4F8O in use by semiconductor industry first use as Cherenkov radiator (TEST BEAM) Chemical name: octafluorotetrahydrofuran. Density: ~10 times heavier than air Boiling point: –0.8oC (Matheson TRI-GAS MSDS), -5.5oC (American Chemical Society) Not a poison. Non-explosive. Colorless. Odorless. Stable, mostly non-reactive except with alkali halide metals (Sodium, Potassium) According to manufacturer can pick-up and transport oils. Contact with organic materials should be minimized. 99.6% pure, rest mostly the isomer of this molecule, also other perfluorocarbons (freons), Non-perfluorocarbons <0.05% Price: ~$40/lb ($24/ft3 at 20oC) C4F8O characterization on-going Material compatibility tests with C4F8O in progress at Syracuse some doubts it could work in UV, scintillations? T. Skwarnicki AEROGEL 1/4:  AEROGEL 1/4 (da E.Nappi) n = 1.03, t = 1 cm ‘80s 2004 total undefl deflect l’aumento di qualita’ negli anni AEROGEL 2/4:  AEROGEL 2/4 COLLABORAZIONE KEK Matsushita Electric Works, Ltd. hydrophobic New production technique new solvent introduced: DMF(N,N-di-methly-formamide) Use DMF together with Methanol as solvent Ichiro Adachi High transparency with DMF >~ 70% ISSUES: larger transparency larger tiles multilayer tiles AEROGEL 3/4:  AEROGEL 3/4 Notizie da Novosibirsk collaborazione dal 1988 di Boreskov Institute of Catatlysis Budker Institute of Nuclear Physiscs campione igroscopico NOVOSIBIRSK (A. Danilyuk) AEROGEL 4/4:  AEROGEL 4/4 (S. Korpar) Matsushita Aerogel AEROGEL, how to increase number of photons without degrading the resolution? DIRC DI SECONDA GENERAZIONE: IL TOP 1/2:  DIRC DI SECONDA GENERAZIONE: IL TOP 1/2 TOP Counter Concept Quartz-based RICH counter to detect internally reflected Cherenkov light (like DIRC at BaBar) But reconstruct the image in (X,TOP) instead of (X,Y). “TOP” = Time Of Propagation Possible if DTOP < 100ps for each arriving photon. Toru Iijima butterfly TOP J. Vavra DIRC DI SECONDA GENERAZIONE: IL TOP 2/2:  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 Slide27:  SIXTH INTERNATIONAL WORKSHOP ON RICH IMAGING CHERENKOV DETECTORS @ TRIESTE Hosting Institution: INFN Slide28:  Trieste selected on 1/12/04 by ISAC we thanks the Committee we will do our best to make the 6th Workshop successful when? in 3 years from now  October 2007 The BaseLine Option “Stazione Marittima” :  The BaseLine Option “Stazione Marittima” The main feature of this proposal is the location of the Workshop Building, which is down-town, in the town centre, directly located on the see side, near (within walking distance) to several hotels, a number of restaurants, most of Trieste Museums, the historical nucleus of the town and the most elegant shopping area. Slide30:  JUST IN CASE … ANCORA GAS:  ANCORA GAS goals: be highly pixilated (a few mm2 pads), work in 15kG magnetic field, deliver a 100-200ps timing resolution per single photon be affordable Why gas? in vacuum, photoelectrons go straight and hit top MCP surface. Only less than 30-50% of them will be “in time” and collected in gaseous device, 95-98% photoelectrons will be collected. They would work in magnetic field. (da J.Vavra, T. Simiyoshi ) IDEA per bloccare l’ion feed back (funziona in campo B; inclinaz. fori MCP = angolo di Lorenz) L’ ion backflow al catodo e’ nullo entro l’erroire di misura. HPD & Co.:  HPD & Co. propsettive per un’alternativa agli HPD DEP sviluppo di HPD e HPAD in cooperazione Belle e Hamammatsu goal : multi-anode (144ch) HPD/HAPD Outer: 72x72 mm2 Effective : 59x59 mm2 (65%) Multi-anode:12x12=144 ch. Pixel Size: 4.9x4.9 mm2 dal catalogo DEP Basic performance has been studied with the 3x3 type HPD /HAPD. 3x3 ch HPD No serious problem Higher gain than expected (1500 -> 2100). 3x3 ch HAPD Low yield of good quality APD’s. There is a HV leak from photocathode. High gain but very noisy. Further investigation is underway with a new production batch. FOTORIVELATORI A VUOTO DI GRANDI DIMENSIONI PER LA FISICA DEI n 1/2:  FOTORIVELATORI A VUOTO DI GRANDI DIMENSIONI PER LA FISICA DEI n 1/2 grande accettanza angolare (~ 120 gradi), buona risoluzione temporale (~ 2 nsec) (C. Joram) FOTORIVELATORI A VUOTO DI GRANDI DIMENSIONI PER LA FISICA DEI n 2/2:  FOTORIVELATORI A VUOTO DI GRANDI DIMENSIONI PER LA FISICA DEI n 2/2 QUASAR-370 NT-200 Bayarto Lubsandorzhiev

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