Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 11
S. Dalla TorreS. Dalla Torre
HIGH-LIGHTS DA HIGH-LIGHTS DA
argomenti selezionatiargomenti selezionati::
•caratteristiche del Workshop(s)caratteristiche del Workshop(s)
•RICH ed esperimenti (presente e futuro)RICH ed esperimenti (presente e futuro)
•stato, innovazioni e prospettive della tecnologiastato, innovazioni e prospettive della tecnologia
•il prossimo WORKSHOPil prossimo WORKSHOP
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 22
IL WORKSHOPIL WORKSHOP workshop precedentiworkshop precedenti
il sito di RICH2004 il sito di RICH2004 http://www.ifisica.uaslp.mx/rich2004/main.htmlhttp://www.ifisica.uaslp.mx/rich2004/main.html
partecipanti: 94 registratipartecipanti: 94 registrati
sessioni, tutte plenarie, sessioni, tutte plenarie, sui temi:sui temi:
(per un totale di 64 talk(per un totale di 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
il sito di RICH2004il sito di RICH2004
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 33
L’ INFN @ RICH2004L’ INFN @ RICH2004
DAL PROGRAMMA SCIENTIFICO: DAL PROGRAMMA SCIENTIFICO: la partecipazione italianala partecipazione italiana
(8 contributi)(8 contributi)
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 TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 44
VITALITA’ DEI RICH 1/2VITALITA’ DEI 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/Č without RICH/Č 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, BTeV (Fermilab)BTeV (Fermilab)
LHCb (CERN); Super B-LHCb (CERN); Super B-Factory (SLAC/KEK?)Factory (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(Mediterranean)Antares(Mediterranean);;
NESTOR (Greece)NESTOR (Greece)tabella di B. Ratcliff – RICH2004tabella di B. Ratcliff – RICH2004(con qualche aggiounta)(con qualche aggiounta)
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 55tabella di B. Ratcliff – RICH2004tabella di B. Ratcliff – RICH2004(con qualche aggiounta)(con qualche aggiounta)
VITALITA’ DEI RICH 2/2VITALITA’ DEI 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/Č det.)without RICH/Č 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;
Discussed at this conferenceDiscussed at this conference
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)
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 66
PERCHE’ APPARATI SENZA RICH PERCHE’ APPARATI SENZA RICH ALLE FRONTIERE DELL’ENERGIAALLE FRONTIERE DELL’ENERGIA ? ?
non sembra esserci un golden channel che richieda PIDnon sembra esserci un golden channel che richieda PID anche se un buon PID puo’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 il problema tecnico principale potrebbe venire dalla richiesta di ermeticita’ermeticita’
nel futuro, vedremo proposte come quella qui sotto diventare nel futuro, vedremo proposte come quella qui sotto diventare realta’?realta’?
STAR Upgrades R&D Proposal STAR Upgrades R&D Proposal
(N. Smirnov - RICH2004): TPC e RICH integrati !(N. Smirnov - RICH2004): TPC e RICH integrati !
Pad Det with CsI (GEM ?!)16 identical miniTPC’s with GEM readout; “working” gas: fast, low diffusion, UV transparenty
x
Pad Detector III
Pad Detector II
Pad Detector I
Beam Pipe andVertex Detectors
miniTPCToF
EMCMagnet
y
x
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 77
PROGRESSI TECNOLOGICI DEL PROGRESSI TECNOLOGICI DEL RECENTE PASSATORECENTE PASSATO
CSI-MWPCs in COMPASSCSI-MWPCs in COMPASS[+ costruzioni per [+ costruzioni per ALICE-HMPID]ALICE-HMPID]
LHC-B LHC-B
Il DIRC di B
ABAR
Il DIRC di B
ABAR MAPMT per l’upgradeMAPMT per l’upgradedi COMPASS di COMPASS [+ studi per BTEV][+ studi per BTEV]
AEROGEL:AEROGEL:HERMESHERMESLHC-BLHC-BAMSAMSBELLE up-gradeBELLE up-grade
pp
MAPMT perMAPMT peril RICH di AMSil RICH di AMS
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 88
UNA CURIOSITA’ : UNA 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. BuénerdM. Buénerd
CC
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 99
PROGRESSI TECNOLOGICIPROGRESSI TECNOLOGICINOVITA’NOVITA’
fotorivelazionefotorivelazione 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
radiatoriradiatori gassosi (beyond C4F10) aerogel
nuovi approccinuovi approcci TOP, focalized DIRC
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 1010
CsI MWPC – ION FEEDBACKCsI MWPC – ION FEEDBACK
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
dec
reas
e [%
]
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
identificazione del fenomeno dell’ion feed-back come il PROBLEMA dello CsIidentificazione del fenomeno dell’ion feed-back come il PROBLEMA dello CsI
(H. Hoedlmoser)
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 1111
GEM e CsI 1/4GEM e CsI 1/4
RELATIVE QUANTUM EFFICIENCY FOR DIFFERENT GASESCsI semi-transparent photocathode
CsI semi-transparent photocathode
EDRIFT
VGEM
Photocathode
REFLECTIVE PHOTOCATHODEPhotocathode
REFLECTIVE CsI PHOTOCATHODE: field dependence of Q.E.
0
-40 +40
pushing for high pushing for high V !!V !!
reduced IFBreduced IFB
-Reflective PC (compared to ST), higher QE, low sensitivity to ionizing BG radiation- Reduced secondary effects high gains 106 - 107
- Fast: with CF4 = 1.6ns w\single electrons
= 0.33ns w\150 electrons
A. Breskin
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 1212
GEM e CsI 2/4GEM e CsI 2/4
si pensa gia’ ad una si pensa gia’ ad una applicazione: applicazione: l’upgrade di l’upgrade di PhenixPhenix
HBD HBD (Hadron Blind Detector): (Hadron Blind Detector): un contatore Cerenkovun contatore Cerenkov senza senza finestrefinestre
HBD concept:HBD concept:
♣♣ Windowless Cherenkov Windowless Cherenkov detector (L=50cm) detector (L=50cm)
♣♣ CFCF44 as radiator and detector as radiator and detector gasgas
♣♣ CsI reflective photocathode CsI reflective photocathode
♣♣ Triple GEM with pad readoutTriple GEM with pad readout
(I. Tserruya)
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 1313
GEM e CsI 3/4GEM 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 Secondary avalanches due to ion feedbackion feedback
gain limits, imaging problems (observed in gain limits, imaging problems (observed in K-Cs-SbK-Cs-Sb)) Photocathode damagePhotocathode damage due to ion sputtering due to ion sputtering
observed in both: observed in both: CsICsI and and K-Cs-SbK-Cs-Sb
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:Microhole & Strip Microhole & Strip
PlatePlateA. Breskin
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 1414
GEM e CsI 4/4GEM e CsI 4/4
R. Chechik et al.
Thick GEM-like multipliers (TGEM) Thick GEM-like multipliers (TGEM) : : a simple solution for large area a simple solution for large area UV-RICH detectorsUV-RICH detectorsmanufactured by standard PCB techniques of precise drilling drilling in G-10 (+ other materials) and Cu Cu etchingetching
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.
1mm
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 1515
FLAT PANELSFLAT PANELS
Belle 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
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 1616
Channel~400m
~10m
MCP-PMT 1/4MCP-PMT 1/4
Electron amplification in micro Electron amplification in micro
channel (channel ( ~10 ~10m)m) Fast/small transit time spread Gain saturation
B field immunity
Geometrical apperture ~ 60% Geometrical apperture ~ 60%
Gain ~O(10Gain ~O(1066) w/ 2-3 stages ) w/ 2-3 stages Possible to make a multi-Possible to make a multi-
anode PMT.anode PMT.
Toru Iijima
quando le richieste sonoquando le richieste sono• risoluzione temporale spinta risoluzione temporale spinta • operazione in campo magneticooperazione in campo magnetico
HPK6R3809U-50-11X
BINP8N4428
HPK10R3809U-50-25X
Burle2585011-501
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 1717
MCP - PMT 2/4MCP - PMT 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.)
Toru Iijima
•MCP-PMT w/ <10m has excellent single photon counting performance up to 1.5 T
•Gain > 106
•TTS < 35ps Unresolved issues: cross talk + Life time
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 1818
MCP-PMT 3/4MCP-PMT 3/4i multianodoi multianodo
Photo cathodePhoto cathode multi-alkalimulti-alkali
#MCP stage#MCP stage 22
Gain (HV)Gain (HV) 2x102x1066 (-3.5KV) (-3.5KV)
MCP hole dia.MCP hole dia. 1010mm
Geometrical Geometrical C.E.C.E. 50%50%
#pixel /size#pixel /size 1x4 / 5mmx22mm1x4 / 5mmx22mm
Eff. area (2cmEff. area (2cmTT)) 77%77%
Under
dev
elopm
ent
HAMAMATSU: SL10 MCP-PMT
Toru Iijima
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 1919
MCP-PMT 4/4MCP-PMT 4/4i multianodoi multianodo
uniformity is ~1:1.5
J. Vavra J. Vavra
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 2020
RADIATORI GASSOSIRADIATORI GASSOSI C4F10 – non piu’ in produzione (3M)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)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 gas C4F8O (n=1.0014) might be a viable replacement of C4F10 ?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 C4F8O characterization on-going Material compatibility tests with C4F8O in progress at Syracuse some doubts it could work in UV, scintillations?T. Skwarnicki
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 2121
AEROGEL 1/4AEROGEL 1/4
yearyear producerproducer
’’80s80s AirglassAirglass
19961996 MatsubishitaMatsubishita
20042004 Matsubishita,Matsubishita,
NovosibirskNovosibirsk
(da E.Nappi)(da E.Nappi)
0
0.2
0.4
0.6
0.8
1
100 200 300 400 500 600 700 800
T %
wavelength (nm)
’80s
1996
2004
t
n = 1.03, t = 1 cm‘‘80s80s
20020044
total
undefldeflect
l’aumento di qualita’ l’aumento di qualita’ negli anninegli anni
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 2222
AEROGEL 2/4AEROGEL 2/4 COLLABORAZIONECOLLABORAZIONE
KEK Matsushita Electric Works, Ltd.
hydrophobic New production technique New production technique
new solvent introduced: new solvent introduced: DMF(N,N-di-methly-DMF(N,N-di-methly-formamide)formamide)
Use DMF together with Methanol as solvent
Ichiro Adachi
High transparency with DMF >~ 70%100x100x20mm3 n=1.050
No cracks
ISSUES:ISSUES:• larger transparencylarger transparency• larger tileslarger tiles• multilayer tilesmultilayer tiles
boundaryn=1.050
n=1.045
n=1.055
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 2323
AEROGEL 3/4AEROGEL 3/4Notizie da NovosibirskNotizie da Novosibirsk collaborazione dal 1988 dicollaborazione dal 1988 di
Boreskov Institute of Catatlysis
Budker Institute of Nuclear Physiscs
campione campione igroscopicoigroscopico
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. Danilyuk)(A. Danilyuk)
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 2424
AEROGEL 4/4AEROGEL 4/4
(S. (S. Korpar)Korpar)
Matsushita Aerogel
AEROGEL, how to increase number of photons without degrading the resolution?
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 2525
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
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 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
Toru Iijima
J. Vavra
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 2727
SIXTH INTERNATIONAL WORKSHOP ON RICH IMAGING
CHERENKOV DETECTORS@
TRIESTE
Hosting Institution: INFN
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 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 TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 2929
The BaseLineThe BaseLineOptionOption
“Stazione Marittima” “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.
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 3030
JUST IN CASE …JUST IN CASE …
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 3131
ANCORA GASANCORA GAS
goals: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?Why gas? in vacuum, photoelectrons
go straight and hit topMCP surface. Only less than 30-50% of them will be “in time” and collected
in gaseous device, 95-98% photoelectrons will becollected. They would work in magnetic field.
(da J.Vavra, T. Simiyoshi )(da J.Vavra, T. Simiyoshi )
IDEA per bloccare l’ion IDEA per bloccare l’ion feed back (funziona feed back (funziona in campo B; inclinaz. in campo B; inclinaz. fori MCPfori MCP= angolo di Lorenz)= angolo di Lorenz)L’ ion backflow al catodo e’ nullo entro l’erroire di misura.
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 3232
HPD & Co.HPD & Co. propsettive per un’alternativa propsettive per un’alternativa
agli HPD DEPagli HPD DEP
sviluppo di HPD e HPAD in cooperazione Belle e sviluppo di HPD e HPAD in cooperazione Belle e HamammatsuHamammatsu
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 DEPdal 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.
ppnn
Photo electron
APD PD
Silvia DALLA TORRESilvia DALLA TORRE
CSN I, 3-4/4/2005 CSN I, 3-4/4/2005 3333
FOTORIVELATORI A VUOTO DI FOTORIVELATORI A VUOTO DI GRANDI DIMENSIONI PER LA GRANDI DIMENSIONI PER LA
FISICA DEI FISICA DEI 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
grande grande accettanzaccettanzaaangolare angolare (~ 120 (~ 120 gradi),gradi),
buona buona risoluzionrisoluzione e temporaletemporale(~ 2 nsec)(~ 2 nsec)
(C. Joram) (C. Joram)