Speaker
Ms
Shin Hyung Kim
(Korea University)
Description
The Hyperon Spectrometer has been newly developed for the main tracking system in hadron physics experiments at the J-PARC hadron hall[1-3]. The spectrometer is mainly composed of a time projection chamber(HypTPC) and a superconducting magnet(SC magnet). The HypTPC has the octagonal prism-shaped drift volume with the height of 55 cm, which is filled with P-10 gas. The target is located inside the drift volume so as to get a large acceptance. The gating grid plane and the triple GEM layers are utilized in order to reduce the ion backflow against the high rate beam at J-PARC. The gain measured by an $^{55}Fe$ source is around $10^{4}$. The position resolution is obtained as approximately 500 $\mu$m in the positron beam test at ELPH, which corresponds to the 300 $\mu$m in the magnetic field of 1 T. The GET(General Electronics for TPCs)[4] is adopted for the data acquisition. The trigger rate is achieved up to several kHz in the partial readout and zero suppression mode. The SC magnet surrounds the HypTPC and applies the uniform magnetic field in the drift volume. It is a Helmholtz type magnet with two concentric coils separated by the radius of the coils, 50 cm. The typical operating magnetic field is 1 T for the E42 experiment. The full simulation software is also developed to study the expected performance of the Hyperon Spectrometer. The particle identification(PID) capability and the mass resolution of the spectrometer are studied. In this talk, we will present commissioning and expected performance of the Hyperon Spectrometer.
[1] J.K. Ahn and K. Imai, J-PARC Proposal E42, Search for the H-dibaryon with a Large Acceptance Hyperon Spectrometer.
[2] K. Hicks and H. Sako, J-PARC Proposal E45, 3-Body Hadronic Reactions for New Aspects of Baryon Spectroscopy.
[3] K. Tanida and K. Hicks, J-PARC Proposal E72, Search for a Narrow Λ* Resonance using the p(K-, Λ)η Reaction with the hypTPC Detector.
[4] J. Giovinazzo et al., Nucl. Instrum. Methods A 840 (2016) 15-27.
Primary author
Ms
Shin Hyung Kim
(Korea University)
