rich detector for class12 e.cisbani infn-rome and iss class12-rich working group meeting
DESCRIPTION
RICH detector for CLASS12 E.Cisbani INFN-Rome and ISS CLASS12-RICH Working Group Meeting 07 August 2008. Hadron PID in Class12 Baseline. p /K PID rely on LTCC performance in 3-5 GeV/c (No K/p PID in 5-8 GeV/c). RICH. Which RICH?. Liquid Radiator (Freon) Cover up to 5 GeV/c - PowerPoint PPT PresentationTRANSCRIPT
07 Aug 2008 E. Cisbani / Class12-RICH
RICH detector for CLASS12E.Cisbani
INFN-Rome and ISS
CLASS12-RICHWorking Group Meeting
07 August 2008
07 Aug 2008 E. Cisbani / Class12-RICH
Hadron PID in Class12 BaselineGeV/c 1 2 3 4 5 6 7 8 9 10
/KTOF
LTCCHTCC
/pTOF
LTCCHTCC
K/pTOF
LTCC
• /K PID rely on LTCC performance in 3-5 GeV/c• (No K/p PID in 5-8 GeV/c)
RICH
07 Aug 2008 E. Cisbani / Class12-RICH
Which RICH?• Liquid Radiator (Freon)
– Cover up to 5 GeV/c– Relatively inexpensive
(proximity focusing RICH)
• Aerogel + Gas Radiators– Cover up to 12 GeV/c– Very expensive
Cost: Aerogel RICH ~ 5 x Proximity Focusing RICH
07 Aug 2008 E. Cisbani / Class12-RICH
Location of the RICH ?Replace part of LTCC:- No impact on
baseline design- Nobody will
probably complain- Large space
available (and to be covered!)
Add to HTCC:- Impact on baseline design- somebody will probably
complain
07 Aug 2008 E. Cisbani / Class12-RICH
LTCC SectorAbout 6.2 m2
entrance window
1 m depth
07 Aug 2008 E. Cisbani / Class12-RICH
Proximity Focusing RICH
07 Aug 2008 E. Cisbani / Class12-RICH
Gap: 600 mmFreon Thick: 20-30 mm (?)
Resolution: 1.5-1.8 mradChannels: 70 k
Proximity RICH Performance 1/2
(Assume full detection acceptance)
07 Aug 2008 E. Cisbani / Class12-RICH
Proximity RICH: Performance 2/22 cm radiator:p/K separation upto 4.2 GeV/c withsuperior rejection(1:1000) and high K efficiency (93%)
with 3 cm radiator:same performance up to 4.7 GeV/c
07 Aug 2008 E. Cisbani / Class12-RICH
Proximity RICH in LTCC• The RICH replaces 2 adjacent sectors
of LHCCTwo radiatorsOne photon detector
Entrance window ~ 12 m2
Detection area ~ 16 m2
Readout Chs ~ 80000
07 Aug 2008 E. Cisbani / Class12-RICH
HallA Proximity RICH Now in EEL/122
Will be used in the Transversityexperiment next October
07 Aug 2008 E. Cisbani / Class12-RICH
Quarz planarity e parallelism 0.1 mm
07 Aug 2008 E. Cisbani / Class12-RICH
Evaporation Fac. & QE Meas. CsI is evaporated on the pad panel in the evaporation chamber: 120h x 110r cm2 (vacuum 10-7 mbar)
07 Aug 2008 E. Cisbani / Class12-RICH
Recent CsI Evaporation (July08)
07 Aug 2008 E. Cisbani / Class12-RICH
Hall A RICH in Hypernuclear Exp. (2003-2005)
K/ rejection ~ 1/1000
F. Garibaldi et al. NIM A502 (2003)
07 Aug 2008 E. Cisbani / Class12-RICH
Photon Detector• Replace MWPC with GEM Chamber
– faster,– higher gain,– stability at high rate
HBD @ Phenix
07 Aug 2008 E. Cisbani / Class12-RICH
Costs (!very preliminary!)
HallA RICH Factor Class12 RICH
Readout 95 4 380 (15%)
MWPC: Pads Planes 20 10 200 (8%)
MWPC: Parts (Macor Insulator) 15 10 150 (6%)
Freon (C6F14) 20 40 800 (33%)
Quartz+Neoceram 30 20 600 (24%)
Mechanical Structure 30 10 300 (12%)
Evaporation Fac. 500 1 500 (exist)
Freon Recirculation System 20 (?) 1.5 30 (?)
Total 210+520 2420+530
Class12/HallaRadiator 36-48 (min.-max. volume), 24 (surface)Detector 13 (surface), 4 (chs)
GEM ~ 1.2 x MWPC k$(estimation from Lire, CHF, $ and Euro)
07 Aug 2008 E. Cisbani / Class12-RICH
Aerogel in HTCCValeryKubarovsky
Main Issues:- Aerogel add 2-3% X0- Online trigger may be
challenging
- HTCC design shall be revised
- Impact on tracking ?
- Cost probably higher than LTCC option (but full acceptance)
07 Aug 2008 E. Cisbani / Class12-RICH
Aerogel RICH: successful in HERMES
• Pixel 2.3• Mirror 0.6• Point emiss. 0.7 • n disp. 0.5• Chromatic 1.3• Forw.Scatt. 0.4• Surface 0.4• Total (calc.)/pe 2.9• Total (exp.)/pe 3.3 • Npe (exp.) 10
One HERMES RICHdetector soon at U.Va.
07 Aug 2008 E. Cisbani / Class12-RICH
Aerogel RICH / expected to be better in future
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
Aerogel improvements Matsushita100x100x20mm3 n=1.050
Dalla Torre / RICH04
… and smaller pixel size
Aerogel cost ~ 4 $/cm3
07 Aug 2008 E. Cisbani / Class12-RICH
Conclusion?• Proximity RICH in 2 LTCC sectors should
provide:/K rejection better than
• 1:1000 up to 4.2 GeV/c (worst case)• 1:1000 up to 4.7 GeV/c (best case) • 1:100 up to 5 GeV/c (K efficiency > 90%)
• Costs about $ 2.5M
• Aerogel option should be investigated further
07 Aug 2008 E. Cisbani / Class12-RICH