A radial time projection chamber for alpha detection in CLAS at JLab

Author:

Dupre, R.  Stepanyan, S.  Hattawy, M.  Baltzell, N.  Hafidi, K.  Battaglieri, M.  Bueltmann, S.  Celentano, A.  De Vita, R.  El Alaoui, A.  El Fassi, L.  Fenker, H.  Kosheleva, K.  Kuhn, S.  Musico, P.  Minutoli, S.  Oliver, M.  Perrin, Y.  Torayev, B.  Voutier, E.  

Journal:

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT

Issue Date:

2018

Abstract(summary):

A new Radial Time Projection Chamber (RTPC) was developed at the Jefferson Laboratory to track low-energy nuclear recoils to measure exclusive nuclear reactions, such as coherent deeply virtual Compton scattering and coherent meson production off He-4. In 2009, we carried out these measurements using the CEBAF Large Acceptance Spectrometer (CLAS) supplemented by the RTPC positioned directly around a gaseous He-4 target, allowing a detection threshold as low as 12 MeV for He-4. This article discusses the design, principle of operation, calibration methods and performances of this RTPC.

Page:

90---97