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 ( nm) MWPC con TMAE FOV 4^ Trigger 2 Livelli Soglia 1 TeV

The UV Cherenkov light properties Typical CLUE event on one mirror 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: sigma

CLUE RESULTS : AGN MRK421 Mrk 421 Active Period Mrk 421 Quiescent Period Obs Hours: Tot Events: Used Events: Excess: Significance level: sigma

Data Analysis on  -sources Preliminary Crab  feb.-mar 98, feb. 99, and nov.99 - mar  90 hrs ON-source  evts  reconstructed events ( Ncluster>9 )  OFF-source MrK421  Apr.-May 98 and mar  86 hrs ON-source  evts  reconstructed events ( Ncluster>9)  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]

4 : HPD A. Menzione, Gr 2, 19/11/03

Rb2Te 5-inch: Q.E.

Cover for HPD SYLGARD moulding air evaporationjob done!!! Rb2Te 5-inch: SYLGARD

Rb2Te 5-inch: Gain Equalization FFT Ref NIM A 385(1997)

Bialkali 10-inch: Production Assembly Top view Heater

Bialkali 10-inch:Sealed and working in May inch saled TOM-HPD compared to 5-inch HPD

Bialkali 10-inch: Q.E.

First Conclusion Wider in QE Good separation between noise and single phe Good photon counting (small gain fluctuations) Good imaging property (detector segmented) Good time property Project CERN-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