Neutral Kaon Spectrometer 2

Abstract

A large-acceptance spectrometer, Neutral Kaon Spectrometer 2 (NKS2), was newly constructed to explore various photoproduction reactions in the giga- * Corresponding author. electronvolt region at the Laboratory of Nuclear Science (LNS, currently ELPH), Tohoku University. The spectrometer consisted of a dipole magnet, drift chambers, and plastic scintillation counters. NKS2 was designed to separate pions and protons in a momentum range of less than 1 GeV/c, and was placed in a tagged photon beamline. A cryogenic H 2 /D 2 target fitted to the spectrometer were designed. The design and performance of the detectors are described. The results of the NKS2 experiment on analyzing strangeness photoproduction data using a 0.8-1.1 GeV tagged photon beam are also presented.

Status of a Lifetime Measurement of Light Hypernuclei Using High Intensity Tagged Photon Beam at ELPH

“…2(a) shows the schematic drawing of an experimental setup. The hydrogen target was a standard target of NKS2 [7]. Proto-type of TDL was installed at center of the NKS2 magnet to surround the target.…”

“…Intrinsic time resolution was measured to be 100 ps (σ) with cosmic ray. TDL will be combined with vertex drift chamber (VDC) [7] used in previous NKS2 experiment. CH x target will be used in this experiment instead of He target.…”