The 4π cylindrical detector SPC/XDC for X-ray and charged particles detection in antiproton annihilations in the OBELIX experiment at LEAR

Author

Bendiscioli, G. ; Boccaccio, P. ; Filippini, V. ; Gastald, U. ; Lombardi, Mara ; Rizzin, E. Lodi ; Marciano, C. ; Maron, G. ; Morando, M. ; Pasquai, G. ; Ricci, R.A. ; Rotondi, A. ; Salvini, P. ; Vannucci, L. ; Vedovato, G. ; Zenoni, A.

Author_Institution

Dipartimento di Fisica Nucl. e Teorica, Pavia Univ., Italy

Volume

38

Issue

2

fYear

1991

fDate

4/1/1991 12:00:00 AM

Firstpage

124

Lastpage

127

Abstract

The central detector of the OBELIX experiment has been in operation at the Low-Energy Antiproton ring (LEAR) during the 1990 runs with antiprotons at rest. The detector-called the Spiral Projection Chamber (SPC) or the X-ray Drift Chamber (XDC) depending on whether its use for charged particles or for X-ray is emphasized-surrounds a cylindrical gas target at NTP, from which it is separated by a very thin Mylar foil, and is positioned along the axis of the open axial field magnet in the center of the Obelix experiment. The characteristics of the detector are described, and its initial performance is discussed

Keywords

X-ray detection and measurement; position sensitive particle detectors; proportional counters; proton accelerators; proton detection and measurement; storage rings; 4π cylindrical detector; LEAR; Low-Energy Antiproton ring; NTP; OBELIX experiment; SPC; Spiral Projection Chamber; X-ray; X-ray Drift Chamber; XDC; antiproton annihilations; central detector; charged particles detection; cylindrical gas target; initial performance; open axial field magnet; thin Mylar foil; Cathodes; Current measurement; Gravity; Ionization; Particle measurements; Strips; Surface reconstruction; Wire; X-ray detection; X-ray detectors;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.289284

Filename

289284