CLUE2

Collaboration:

> - INFN: Napoli, Padova, Pisa, Trieste
> - Brasil: CNRq

Laboratory: Roque de los Muchachos, La Palma, Canarie

National Responsible: A. Menzione (Pi)

Home page of the Experiment: http://www.pi.infn.it/clue/cluehome.html

1. Goal of the experiment

The CLUE experiment was approved to show the possibility to exploit the ultraviolet content of the Cherenkov light produced by atmospheric showers. The apparatus was dimensioned such to be sensitive to known sources (Crab, Markarian) and to have enough resolution to see the shade of the Moon.

2.

Activities 2001

- Test of detectors photosensitive to the UV light as an alternative to the ones presently used
- Data analysis and comparison with collected data

Milestones 2002

The development of the alternate detectors is a project (TOM) proposed to the CSN5

3. INFN contribution to the experiment in terms of manpower and financial support

Manpower:

in the Year 2002 the group is composed by 11 researchers (4.2 FTE). While in the period of construction, the technical help was sizeable, in the last two years was limited at some maintenance.

Budget for the Year 2002:11 kEuro (in "Dotazioni GRII Padova")

4. Publications in refereed journals (in 2001): 3

5. Conference talks (in 2001):

6. Number of undergraduate and doctoral thesis on the experiment

- 2 undergraduate thesis ongoing
- 1 undergraduated thesis consecuted
- 1 doctoral thesis ongoing

7. Leadership roles in the experiment

Is an almost completely Italian experiment so, no discussion on leadership.

8. Innovative instruments

There are several innovative items: 1.8 m diameter mirrors made by slumping. Photosensitive TMAE chambers working outdoors in the mountain. For the future we have in mind detectors based on RbTe photocatodes. We have prototypes we are evaluating

9. Competing experiments

I n a sense all Cherenkov air showers are competing experiments (WHIPPLE) is the most important existing one. On the other side CLUE should be considered complementary since it can run with the Moon in the sky and point other luminous region.

10. International committee which has reviewed the experiment

The experiment was evaluated and approved beside GR 2 of INFN by the IAC Committee (Istituto Astrofisico Canarias) which follows the recommendations of an international committee.