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The solar neutrino HELLAZ project
Dolbeau J., Giomataris I., Gorodetzky P., Patzak T., Salin P. et al
Dans Nuclear Physics B Proceedings Supplements - International Workshop on Topics in Astroparticle and Undeground Physics, TAUP 2003, Seattle : États-Unis - http://hal.in2p3.fr/in2p3-00024530
Physique/Physique des Hautes Energies - Expérience
The solar neutrino HELLAZ project
J. Dolbeau1, I. Giomataris, P. Gorodetzky1, T. Patzak1, P. Salin1, A. Sarat
1 :  PCC - Physique Corpusculaire et Cosmologie - Collège de France
CNRS : UMR7553 – IN2P3 – Université Paris VII - Paris Diderot
11, place Marcelin Berthelot - 75231 Paris Cedex 05
France
This is a status report of the HELLAZ project, in which a 20 bar He TPC is used to detect the recoil electrons coming from elastic scattering of solar neutrinos. Both the energy and direction (relative to the sun) are measured, allowing to reconstruct the neutrino energy. The measurement of direction of the very low energy electron is difficult. It requires to gather as much information as possible. Hence, it has been chosen to detect separately each individual ionization electron to get the maximum statistics which implies to have a gain in the end-cap detector of the TPC > 10$^6$, together with an X-Y capability. The R&D setup was moved a year ago from College de France, where it has been proven on one pixel that this gain is attainable, to Saclay, where a 10×10 cm$^2$ TPC with 64×64 strips is setup.

Communications avec actes
2005
Nuclear Physics B Proceedings Supplements
138
Frank Avignone, Wick Haxton
94-97

International Workshop on Topics in Astroparticle and Undeground Physics, TAUP 2003
Seattle
États-Unis
05/09/2003
09/09/2003

PCC 03 52/Conf