A cryogenic target for direct reaction studies with exotic beams

P. Dolegieviez (1) , A. Gillibert (2) , W. Mittig (1) , X. Mougeot (2) , A. Obertelli (2) , F. de Oliveira (1) , M. Ozille (1) , P. Robillard (1) , P. Roussel-Chomaz (1) , H. Savajols (1)

1 GANIL - Grand Accélérateur National d'Ions Lourds
2 DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée

A cryogenic system has been designed to make a thin target of solid hydrogen isotopes usable under vacuum, with a particle beam. In order to insure the homogeneity of the target, an equivalent pressure is maintained with helium on both sides of the target windows during the formation of the solid hydrogen. The system developed is described and the results obtained with 1 mm thick solid hydrogen and deuterium targets, in two different experiments using the radioactive beams from the SPIRAL facility, are presented. The flatness achieved was better than a few percent in both experiments.

Mots clés: Experimental methods and instrumentation for elementary-particle and nuclear physics

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

P. Dolegieviez, A. Gillibert, W. Mittig, X. Mougeot, A. Obertelli, et al.. A cryogenic target for direct reaction studies with exotic beams. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2006, 564, pp.32-37. ⟨10.1016/j.nima.2006.03.027⟩. ⟨in2p3-00087389⟩