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