clue passato e futuro a. menzione, gr 2, 19/11/03
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CLUE Passato e Futuro
A. Menzione, Gr 2 , 19/11/03
1 : Generale
A. Menzione, Gr 2 , 19/11/03
CLUE Cherenkov Light UV Experiment
Matrice 9 telescopi 3x3, Passo 45 m, specchi F/1 1.8 m
Lece Cerenkov UV (190-240 nm)MWPC con TMAE
FOV 4^
Trigger 2 Livelli
Soglia 1 TeV
The UV Cherenkov light properties
The UV Cherenkov light propertiesTypical CLUE event on one mirror
Standard imaging
techniques cannot be used
Standard imaging
techniques cannot be used
Cluster
Cluster charge
Cluster centroid
2 : Sources
A. Menzione, Gr 2 , 19/11/03
CLUE RESULTS : CRAB
Obs Hours:Tot Events:
Used Events:Excess:
Significance level:
89680003100010007 sigma
CLUE RESULTS : AGN MRK421
Mrk 421 Active Period Mrk 421 Quiescent PeriodObs Hours:Tot Events:
Used Events:Excess:
Significance level:
362800015000150017 sigma
Data Analysis on -sources Preliminary
Crab
feb.-mar 98, feb. 99, and nov.99 - mar. 2000
90 hrs ON-source
68000 evts
31000 reconstructed events
( Ncluster>9 )
27000 OFF-source
MrK421
Apr.-May 98 and mar. 2000
86 hrs ON-source
63000 evts
32000 reconstructed events ( Ncluster>9)
18000 OFF-source
Data Reduction
Pedestal drift correction
Noisy and hot pad identification and correction
Charged particles / photons selection (on clusters)
We used thrust method to reconstruct showers direction
Corrections depending on I.P. have been not yet applied in that analysis
3 : Moon
A. Menzione, Gr 2 , 19/11/03
Observation of Moon Shadow with old method• Same preliminary treatement of
source data
• We rotate the primary directions in such a way to have the proton
shadow fixed along the - axis.
• The Moon dip lies along this axis (the West of the sky) and then it is
evidenced in the difference between Western and Earsten
bins
Chamber owerview and
pad segmentation
[degrees]
Parametri tipici di questo array in questo sito:
Area eff 6 103 m2
Duty cycle 15 %
Soglia 1 TeV
Risol ang @ 1 TeV .6 deg
Sensib / 100 h .2 Crab
4 : HPD
A. Menzione, Gr 2 , 19/11/03
Three steps:
1- fabricate and test a 5” module UV sensitive
2- fabricate and test a 10” module bialcalivisible
3- fabricate and test a 10” module UV sensitive
Rb2Te 5-inch: Q.E.
Cover for HPD SYLGARD moulding
air evaporation job done!!!
Rb2Te 5-inch: SYLGARD
Rb2Te 5-inch: Gain Equalization
FFT
Ref NIM A 385(1997) 336-370
Bialkali 10-inch: Production
Assembly
Top view
Heater
Bialkali 10-inch:Sealed and working in May 2003
10-inch saled TOM-HPD compared to 5-inch HPD
Bialkali 10-inch: Q.E.
Step 3: 10” HPD with RubidiumTelluride
Needs UV transparent quartz windowProblems in quartz-to-pirex coupl.Two solutions:
1- Full construction in quartztwo prototype generations done,dimensionally OK, vacuum ~OKwe need a third prototype with
electrodes.
2- Quartz-Indium-Kovar-Pirexhi tech (Photec-SVT-CERN)orders issued, parts due by Sep.
Both solutions are promising, we will choose onthe base of cost and reliability.
First ConclusionWider in QEGood separation between noise and single pheGood photon counting (small gain fluctuations)Good imaging property (detector segmented)Good time property
QuickTime™ and aGraphics decompressorare needed to see this picture.
ProjectCERN-INFN
GOAL:Production of a 10-inch
HPD - Quartz window - Rb2Te Photocathode - Integrated electronics
TOM development road map* 5-inch Solar blind Rb2Te
Photocathode (Q.E. 15 %) (BEAUNE 2002 NIM A 504 (2003) 19 )
DONE
* 10-inch tube with Bialkali Photocathode (Q.E. 25%) (ELBA 2003 to be published on NIM A)
DONE
* 10-inch tube with QUARTZ window and Rb2Te with very special technology sealing quartz window to glass body developed toghether with PHOTEK and SVT
2003
* 10-inch tube with autotriggering electronics (VA-TA). Ready for CLUE
2004
CONCLUSIONI
2004 Ulteriori sviluppi HPD e altro hardware
Riimportazione apparato
Preparazione proposal
COSTI: Trasporti 30KMiss est 5 K
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