Speaker
Kunihiro Fujita
(Osaka University)
Description
We developed position sensitive gas detector with Gas Electron Multiplier
(GEM) for tracking of charged particle. Our physics goal is to study the short
range correlation of the nuclear interaction in the nuclear medium with a
Coherent Pion Production (CPP) experiment. The experiment is performed at
the neutron time of flight facility (NTOF) at RCNP with the 12C(p,
nπ+)12C(ground state) reaction at the beam energy of 392 MeV. The
produced π +s are bent by the dipole magnet, and detected by the tracking
detector installed inside the magnet. In order to identify the CPP event, high
energy resolution for π is needed. Therefore high position resolution is
required to analyze the π +’s momentum. Moreover, because tracking
detector is placed in the magnet which close to the reaction point, it must
be able to be operated under the high magnetic field about 1Tesla and harsh
radiation environment. In order to satisfy these requirements, we develop
the detector with Gas Electron Multiplier (GEM). The spatial resolution of
100μm will be achieved by using two dimentional readout board with
400μm pitch strips. We report about the performance of GEM detector and
the result of recent experiment performed at RCNP.
Author
Kunihiro Fujita
(Osaka University)
