S. Dalla Torre HIGH-LIGHTS DA · S. Dalla Torre HIGH-LIGHTS DA argomenti selezionati: ... Magic (la...
Transcript of S. Dalla Torre HIGH-LIGHTS DA · S. Dalla Torre HIGH-LIGHTS DA argomenti selezionati: ... Magic (la...
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 11
S. S. DallaDalla TorreTorre
HIGHHIGH--LIGHTS DA LIGHTS DA
argomentiargomenti selezionatiselezionati::
••caratteristichecaratteristiche del del Workshop(sWorkshop(s))
••RICH ed RICH ed esperimentiesperimenti ((presentepresente e e futurofuturo))
••statostato, , innovazioniinnovazioni e e prospettiveprospettive delladella tecnologiatecnologia
••ilil prossimoprossimo WORKSHOPWORKSHOP
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 22
IL WORKSHOPIL WORKSHOPworkshop workshop precedentiprecedenti
ilil sitosito di RICH2004 di RICH2004 http://www.ifisica.uaslp.mx/rich2004/main.htmlhttp://www.ifisica.uaslp.mx/rich2004/main.html
partecipantipartecipanti: 94 : 94 registratiregistrati
sessionisessioni, , tuttetutte plenarieplenarie, , suisui temitemi::(per un (per un totaletotale di 64 talkdi 64 talke 13 posters)e 13 posters)
Year Location Proceedings1993 Bari, Italy Nuclear Instruments and Methods A, Vol 343, Issue 11995 Upsalla, Sweden Nuclear Instruments and Methods A, Vol. 371, Issue 1/21998 Ein Gedi, Israel Nuclear Instruments and Methods A, Vol. 433, Issue 1/22002 Pylos, Greece Nuclear Instruments and Methods A, Vol. 502, Issue 1
RICH at Colliders Novel RICH Detectors RICH at Fixed Target Experiments Technological Aspects Cherenkov Detectors in Astroparticle Projects Other Particle ID Methods
ilil sitosito di RICH2004di RICH2004
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 33
LL’’ INFN @ RICH2004INFN @ RICH2004
DAL PROGRAMMA SCIENTIFICO: DAL PROGRAMMA SCIENTIFICO: la la partecipazionepartecipazione italianaitaliana(8 (8 contributicontributi))
speaker titolo esperimento
Fulvio Tessarotto STUDIES FOR A FAST RICH COMPASSSergio Costa CLAM COMPASSMaria Angela Nitti Progress in UV thin film photocathodes ALICESilvia Dalla Torre STATUS AND CHARACTERIZATION OF COMPASS RICH-1 COMPASSMauro Iodice Performance and results of the RICH detector for kaon physics in Hall A at Jefferson Lab Hall A J-labClara Matteuzzi A RICH with aerogel LHC-bEugenio Nappi New perspectives with RICH ALICE, HERMES, STARSergio Costa SIC, a Cherenkov radiation simulator COMPASS
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 44
VITALITAVITALITA’’ DEI RICH 1/2DEI RICH 1/2Physics 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 detdet))
Heavy Flavor PhysicsHeavy Flavor Physics •• Confronting the Standard Model:Confronting the Standard Model:Precision Measurements of CP Violation in Precision Measurements of CP Violation in B Sector; B Sector; •• Are there experimental hints of New Are there experimental hints of New Physics?Physics?
BaBar(SLACBaBar(SLAC)), , BELLE(KEK),BELLE(KEK),CLEOCLEO--III(CornellIII(Cornell), CKM, ), CKM, SELEX, SELEX, BTeVBTeV ((FermilabFermilab))LHCbLHCb (CERN); Super B(CERN); Super B--Factory (SLAC/KEK?)Factory (SLAC/KEK?)
HadronHadron StructureStructure •• Do Do PentaquarksPentaquarks exist?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]; [2460]; DDssJJ[2632](SELEX); X(3872)[2632](SELEX); X(3872)
Many of the Heavy Flavor Many of the Heavy Flavor Experiments above;Experiments above;HERMES(DESY);HERMES(DESY);COMPASS(CERN); COMPASS(CERN); ((SELEX(FermilabSELEX(Fermilab))))GSI: PANDA, CBMGSI: PANDA, CBMHALLHALL--A (JLAB)A (JLAB)
Neutrino PhysicsNeutrino Physics •• First Confirmed Physics Beyond SMFirst Confirmed Physics Beyond SM•• Are neutrinos Are neutrinos DiracDirac or or MajoranaMajorana? ? •• What is the mass What is the mass hierachyhierachy??•• Neutrino AstrophysicsNeutrino Astrophysics
Super Super KamiokandeKamiokande; ; SNO(SudburySNO(Sudbury); Lake ); Lake Baikal;Baikal;Ice Ice Cube(SouthCube(South Pole);Pole);Antares(MediterraneanAntares(Mediterranean););NESTOR (Greece)NESTOR (Greece)
tabellatabella di B. Ratcliff di B. Ratcliff –– RICH2004RICH2004(con (con qualchequalche aggiountaaggiounta))
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 55
VITALITAVITALITA’’ DEI RICH 2/2DEI RICH 2/2Physics 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 detdet..))
Quark Matter at High Quark Matter at High Density (Heavy Ions)Density (Heavy Ions)
Discovery of QuarkDiscovery of Quark--Gluon 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?; •• SupersymmetrySupersymmetry??
CDF/D0(Fermilab)CDF/D0(Fermilab)ATLAS/CMS(LHC)ATLAS/CMS(LHC)
AstroAstro--particle physicsparticle physics •• Ultra High Energy Cosmic Ultra High Energy Cosmic Rays;Rays;•• Very High Energy Gamma Very High Energy Gamma Rays;Rays;
Discussed at this conferenceDiscussed at this conferenceAMSAMS--02(Space)02(Space)Auger (Argentina)Auger (Argentina)HESS (Namibia); HESS (Namibia); PueblaPueblaTTUUNNKKA (A (SSiibbeerriiaa))Mexico/Mexico/ChalcatayaChalcatayaMagic (la Palma) Magic (la Palma)
tabellatabella di B. Ratcliff di B. Ratcliff –– RICH2004RICH2004(con (con qualchequalche aggiountaaggiounta))
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 66
PERCHEPERCHE’’ APPARATI SENZA RICH ALLE APPARATI SENZA RICH ALLE FRONTIERE DELLFRONTIERE DELL’’ENERGIAENERGIA ??
non non sembrasembra esserciesserci un golden channel un golden channel cheche richiedarichieda PIDPIDancheanche se un se un buonbuon PID PID puopuo’’
ridurre il fondo combinatoriofornire sensibilita’ per segnali di nuova fisicarendere gli apparati ancor piu’ multipurpose
ilil problemaproblema tecnicotecnico principaleprincipale potrebbepotrebbe venire venire dalladalla richiestarichiesta di di ermeticitaermeticita’’nelnel futurofuturo, , vedremovedremo proposteproposte come come quellaquella qui sotto qui sotto diventarediventare realtarealta’’??
STAR Upgrades R&D Proposal STAR Upgrades R&D Proposal (N. Smirnov (N. Smirnov -- RICH2004): TPC e RICH RICH2004): TPC e RICH integratiintegrati !!
Pad Det with CsI (GEM ?!)16 identical miniTPC’swith GEM readout;“working” gas:
fast, low diffusion, UV transparenty
x
Pad Detector III
Pad Detector II
Pad Detector I
Beam Pipe andVertex Detectors
miniTPC
ToFEMC
Magnet
y
x
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 77
PROGRESSI TECNOLOGICI DEL PROGRESSI TECNOLOGICI DEL RECENTE PASSATORECENTE PASSATO
CSICSI--MWPCsMWPCs in COMPASSin COMPASS[+ [+ costruzionicostruzioni per per ALICEALICE--HMPID]HMPID]
LHCLHC--B B
Il DIRC di BABAR
Il DIRC di BABAR MAPMT per MAPMT per ll’’upgradeupgrade
di COMPASS di COMPASS [+ [+ studistudi per BTEV]per BTEV]
AEROGEL:AEROGEL:HERMESHERMESLHCLHC--BBAMSAMSBELLE upBELLE up--gradegrade
ppππ
MAPMT perMAPMT perilil RICH di AMSRICH di AMS
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 88
UNA CURIOSITAUNA CURIOSITA’’ : : IDENTIFICAZIONE DI IONI PESANTIIDENTIFICAZIONE DI IONI PESANTI
C
Z2
3 6
>~16
>16
He
Li Si-P ?
~Fe ?
Nγ in the ring ~ Z2 - dopo CAPRIS e HIRICH, i test beam di AMS
M. M. BuBuéénerdnerd
CC
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 99
PROGRESSI TECNOLOGICIPROGRESSI TECNOLOGICINOVITANOVITA’’
fotorivelazionefotorivelazionedepositi fotosensibili e gas: il ruolo di ion feedback
studi quantitativi con CsIfotorivelatori a gas:
GEM & GEM-like + Cs
fotorivelatori in vuoto: flat panelsMCP - PMT
radiatoriradiatorigassosi (beyond C4F10)aerogel
nuovinuovi approcciapprocciTOP, focalized DIRC
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 1010
CsICsI MWPC MWPC –– ION FEEDBACKION FEEDBACKidentificazioneidentificazione del del fenomenofenomeno delldell’’ionion feedfeed--back come back come ilil PROBLEMA PROBLEMA dellodello CsICsI
Dose-effect relation from 3 different irradiated zones
Different doses on 3 irradiated positions
Dose-response relation for49 days and 129 days after irradiation(time effect taken into account by interpolation)
expected dose for 10 y ALICE
(0.5 mC/cm2)
fits of the dose effect with a cumulative lognormal distribution function
0 1 2 3 4 5 6 7 8 9 100
10
20
30
40
50
60
70
80
90
100
lognormal fit 49 dinterpolated measurement 49 dlognormal fit 129 dinterpolated measurement 129 dlognormal fit 2 dinterpolated measurement 2d
integrated dose [mC/cm2]
QE
decr
ease
[%]
Pos 3
Pos 1Pos 2
pos 3
pos 1
pos 2
y [mm]
x [mm]
Inorm
Results obtained with the VUV-scanner for 3 irradiation with different doses of accumulated charge
(H. Hoedlmoser)
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 1111
GEM e GEM e CsICsI 1/41/4CsI semi-transparent photocathode
EDRIFT
∆VGEM
Photocathode
REFLECTIVE PHOTOCATHODEPhotocathode
reduced IFBreduced IFBRELATIVE QUANTUM EFFICIENCY FOR DIFFERENT GASESCsI semi-transparent photocathode
REFLECTIVE CsI PHOTOCATHODE: field dependence of Q.E.
0-40 +40
pushing for high pushing for high ∆∆V !!V !!-Reflective PC (compared to ST), higher QE, low sensitivity to ionizing BG radiation
- Reduced secondary effects high gains 106 - 107
- Fast: with CF4 σ = 1.6ns w\single electronsσ = 0.33ns w\150 electrons
A. Breskin
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 1212
GEM e GEM e CsICsI 2/42/4
sisi pensapensa giagia’’ ad ad unauna applicazioneapplicazione: : ll’’upgradeupgrade di di PhenixPhenix
HBD HBD ((HadronHadron Blind Detector): un Blind Detector): un contatorecontatore CerenkovCerenkov senzasenzafinestrefinestre
HBD concept:HBD concept:♣♣ Windowless Windowless CherenkovCherenkov detector detector
(L=50cm) (L=50cm) ♣♣ CFCF44 as radiator and detector gasas radiator and detector gas♣♣ CsICsI reflective photocathode reflective photocathode ♣♣ Triple GEM with pad readoutTriple GEM with pad readout
(I. Tserruya)
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 1313
GEM e GEM e CsICsI 3/43/4Real 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 Secondary avalanches due to ion feedbackion feedbackgain limits, imaging problems (observed in gain limits, imaging problems (observed in KK--CsCs--SbSb))Photocathode damagePhotocathode damage due to ion sputteringdue to ion sputtering
observed in both: observed in both: CsICsI and and KK--CsCs--SbSb
Major efforts to limit ion backflowMajor efforts to limit ion backflow
photocathode
cathode mesh
hv
VC-TVA-C
E trans
E drift
CA
MHSP:MHSP:MicroholeMicrohole & Strip Plate& Strip Plate
A. Breskin
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 1414
GEM e GEM e CsICsI 4/44/4Thick GEMThick GEM--like multipliers (TGEM) : like multipliers (TGEM) : a simple solution for large area a simple solution for large area UVUV--RICH detectorsRICH detectorsmanufactured by standard PCB techniques of precise drilling drilling in G-10 (+ other materials) and Cu etchingCu etching
1mm
R. Chechik et al.
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.
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 1515
FLAT PANELSFLAT PANELSBelle upgrade, test beamBelle upgrade, test beam
matrix of flat panels,matrix of flat panels,HammamatsuHammamatsu H8500
uniformity is ~1:2.5
H8500
P. P. KrizanKrizan
J. J. VavraVavra
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 1616
MCPMCP--PMT 1/4PMT 1/4Channel
~400µmInput electron
HV
MCP channel
φ~10µm
Photo
-catho
de
MCP
HV
Anod
e
quandoquando le le richiesterichieste sonosono•• risoluzionerisoluzione temporaletemporale spintaspinta•• operazioneoperazione in campo in campo magneticomagnetico
Electron amplification in micro Electron amplification in micro channel (channel (φφ ~10~10µµm)m)
Fast/small transit time spreadGain saturation
B field immunity
Geometrical Geometrical appertureapperture ~ 60% ~ 60% Gain ~O(10Gain ~O(1066) w/ 2) w/ 2--3 stages 3 stages Possible to make a multiPossible to make a multi--anode anode PMT.PMT.
Toru Iijima
HPK6R3809U-50-11X
BINP8N4428
HPK10R3809U-50-25X
Burle2585011-501
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 1717
MCP MCP -- PMT 2/4PMT 2/4
TDC(time walk corrected).
25ps/count
Tail componentdue to bouncingpe at MCP surface
Small chanel diam. Shows high stability against B-field
1p.e2p.e
3p.e
HPK6 at B=1.5T (0deg.) BINP8 at B=1.5T (15deg.) •MCP-PMT w/ <10µm has excellent single photon countingperformance up to 1.5 T
•Gain > 106
•TTS < 35psUnresolved issues: cross talk + Life time!!
Toru Iijima
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 1818
MCPMCP--PMT 3/4PMT 3/4i i multianodomultianodo
Photo cathodePhoto cathode multimulti--alkalialkali#MCP stage#MCP stage 22Gain (HV)Gain (HV) 2x102x1066 ((--3.5KV)3.5KV)MCP hole MCP hole diadia.. 1010µµmmGeometrical C.E.Geometrical C.E. 50%50%#pixel /size#pixel /size 1x4 / 5mmx22mm1x4 / 5mmx22mmEffEff. area (2cm. area (2cmTT)) 77%77%
22 (effective area)27.5
1ch2ch3ch4ch
Under
deve
lopmen
t
HAMAMATSU: SL10 MCP-PMT
Toru Iijima
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 1919
MCPMCP--PMT 4/4PMT 4/4i i multianodomultianodo
uniformity is ~1:1.5
J. J. VavraVavra
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 2020
RADIATORI GASSOSIRADIATORI GASSOSIC4F10 C4F10 –– non non piupiu’’ in in produzioneproduzione (3M)(3M)
n ~ 1.0014 (il maggior n fra i fluorocarbori gassosi a T ambiente)C5F12 (C5F12 (minimominimo n n frafra i i fluorocarburifluorocarburi liquidiliquidi a T a T ambienteambiente))
RICH in pressione o caldi
BTeV investigation: gas C4F8O (n=1.0014) might be a viable replacement of gas C4F8O (n=1.0014) might be a viable replacement of C4F10 ?C4F10 ?
C4F8O in use by semiconductor industry first use as Cherenkov radiator (TEST BEAM)Chemical name: octafluorotetrahydrofuran.Density: ~10 times heavier than airBoiling 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 onC4F8O characterization on--going going Material compatibility tests with C4F8O in progress at Syracusesome doubts it could work in UV, scintillations?
T. Skwarnicki
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 2121
AEROGEL 1/4AEROGEL 1/4ll’’aumentoaumento di di qualitaqualita’’ neglinegli annianni
0
0.2
0.4
0.6
0.8
1
100 200 300 400 500 600 700 800
wavelength (nm)
’80s
1996
2004
t
yearyear producerproducer’’80s80s AirglassAirglass19961996 MatsubishitaMatsubishita20042004 MatsubishitaMatsubishita,,
NovosibirskNovosibirsk
‘‘80s80s
20042004total
undefldeflect
n = 1.03, t = 1 cm
((dada E.NappiE.Nappi))
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 2222
AEROGEL 2/4AEROGEL 2/4COLLABORAZIONECOLLABORAZIONE
KEKMatsushita Electric Works, Ltd.
hydrophobicNew production technique New production technique new solvent introduced: new solvent introduced: DMF(N,NDMF(N,N--didi--methlymethly--formamideformamide))
Use DMF together with Methanol as solvent
ISSUES:ISSUES:•• larger transparencylarger transparency•• larger tileslarger tiles•• multilayer tilesmultilayer tiles
High transparency with DMF >~ 70%100x100x20mm3
n=1.050
No cracks
boundaryn=1.050
n=1.045
n=1.055
Ichiro Adachi
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 2323
AEROGEL 3/4AEROGEL 3/4NotizieNotizie dada NovosibirskNovosibirsk
collaborazionecollaborazione daldal 1988 di1988 diBoreskov Institute of CatatlysisBudker Institute of Nuclear Physiscs
campionecampioneigroscopicoigroscopico
Light scattering length = 44 mm at 400 nmthickness
mmindex
desiredindex
measuredLayer1 6.0 1.030 1.0297+- 0.0003Layer2 6.3 1.027 1.0268+-0.0005Layer3 6.7 1.024 1.0234+-0.0003Layer4 7.0 1.022 1.0213+-0.0003
NOVOSIBIRSK NOVOSIBIRSK (A. (A. DanilyukDanilyuk))
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 2424
AEROGEL 4/4AEROGEL 4/4AEROGEL, how to increase number of photons without degrading the resolution?
Matsushita Aerogel
(S. (S. KorparKorpar))
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 2525
DIRC DI SECONDA DIRC DI SECONDA GENERAZIONE: IL TOP 1/2GENERAZIONE: IL TOP 1/2
TOP Counter ConceptTOP Counter ConceptQuartzQuartz--based RICH counter to detect based RICH counter to detect internally reflected internally reflected CherenkovCherenkov light light (like DIRC at (like DIRC at BaBarBaBar))But reconstruct the image in (X,TOP) But reconstruct the image in (X,TOP) instead of (X,Y).instead of (X,Y).““TOPTOP”” = = Time Of PropagationTime Of PropagationPossible if Possible if ∆∆TOP < TOP < 100ps100ps for each arriving photon.for each arriving photon.
butterfly TOP butterfly TOP
J. Vavra
Toru Iijima
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 2626
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
10cm
40cm
2cm
Readout plane
Focusing mirror
J. Vavra
Toru Iijima
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 2727
SIXTH INTERNATIONAL WORKSHOP ON RICH IMAGING
CHERENKOV DETECTORS@
TRIESTE
Hosting Institution: INFN
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 2828
Trieste selected on 1/12/04 by ISACTrieste selected on 1/12/04 by ISAC
we thanks the Committee we will do our best to make the 6th
Workshop successful
when?when?
in 3 years from now October 2007
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 2929
The The BaseLineBaseLineOptionOption
““StazioneStazione MarittimaMarittima””
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.
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 3030
JUST IN CASE JUST IN CASE ……
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 3131
ANCORA GASANCORA GASgoals:goals:
be highly pixilated (a few mm2 pads),work in 15kG magnetic field,deliver a 100-200ps timing resolution persingle photonbe affordable
Why gas?Why gas?in vacuum, photoelectrons go straight and hit topMCP surface. Only less than 30-50% of them will be “in time” and collectedin gaseous device, 95-98% photoelectrons will becollected. They would work in magnetic field.
IDEA per IDEA per bloccarebloccare ll’’ionionfeed back (feed back (funzionafunzionain campo B; in campo B; inclinazinclinaz. . forifori MCPMCP= = angoloangolo di Lorenz)di Lorenz)L’ ion backflow al catodo e’nullo entro l’erroire di misura.
((dada J.VavraJ.Vavra, T. , T. SimiyoshiSimiyoshi ))
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 3232
HPD & Co.HPD & Co.propsettivepropsettive per per unun’’alternativaalternativaagliagli HPD DEPHPD DEP
svilupposviluppo di HPD e HPAD in di HPD e HPAD in cooperazionecooperazione Belle e Belle e HamammatsuHamammatsugoal : multi-anode (144ch) HPD/HAPD
Outer: 72x72 mm2Effective : 59x59 mm2 (65%)Multi-anode:12x12=144 ch.Pixel Size: 4.9x4.9 mm2
daldal catalogocatalogo DEPDEP
Basic performance has been studied with the 3x3 type HPD /HAPD.3x3 ch HPD
No serious problemHigher gain than expected (1500 -> 2100).
3x3 ch HAPDLow 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.
ppnn
Photo electron
APD PD
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 3333
FOTORIVELATORI A VUOTO DI FOTORIVELATORI A VUOTO DI GRANDI DIMENSIONI PER LA GRANDI DIMENSIONI PER LA
FISICA DEI FISICA DEI ν ν 1/21/2
432 mm
(17”)
380 mm
PAHV
optical gel(refr. index matching + insulation)
benthos sphere(432 / 404)
electrical feed-throughs
valve
standard base plate of HPD 10”(prel. version).
C2GT C2GT PhotodetectorPhotodetector
15joint Si
sensorceramic support
grandegrandeaccettanzaaccettanzaangolareangolare (~ (~ 120 120 gradigradi),),
buonabuonarisoluzionerisoluzionetemporaletemporale(~ 2 (~ 2 nsecnsec))
(C. (C. JoramJoram) )
Silvia DALLA TORRESilvia DALLA TORRECSN I, 3CSN I, 3--4/4/2005 4/4/2005 3434
FOTORIVELATORI A VUOTO DI FOTORIVELATORI A VUOTO DI GRANDI DIMENSIONI PER LA FISICA GRANDI DIMENSIONI PER LA FISICA
DEI DEI ν ν 2/22/2
QUASARQUASAR--370370
NT-200
Bayarto Lubsandorzhiev