Time-Projection Chamber for the PEN Experiment

V. A. Baranov-a, M. A. Baturitskii-c, A. Van der Schaaf-b, N. P. Kravchuk-a, A. S. Korenchenko-a,
S. M. Korenchenko-a, N. A. Kuchinskiy-a, P. Robmann-b, V. V. Sidorkin-a, V. S. Smirnov-a,
N. V. Khomutov-a, and S. N. Shkarovskiy-a

a-Joint Institute for Nuclear Research, Dubna
b-The University of Zurich, Zurich, Switzerland
c-National Scientific and Educational Centre of Particle and High Energy Physics of the Belarussian State University, Minsk
e-mail: kuchinski@jinr.ru
Abstract—The PEN collaboration carries out a precision measurement of the π+ → e+ν decay branching
ratio at the Paul Scherrer Institute (PSI, Switzerland). A special mini time-projection chamber (mTPC) has
been developed for registration of particles in the pion beam. The chamber contains 14 × 10–3 g/cm2 of matter
on the particle path. The chamber was successfully used during one-year-long run. Design and characteristics
of the mTPC are described.
DOI: 10.1134/S1547477112020057

Category: Разное