High-resolution spectrometers for both incident beams and scattered particles have been con- structed at the K1.8 beam line of the Hadron Experimental Facility at J-PARC. A point-to-point optics is realized between the entrance and exit of QQDQQ magnets for the beam spectrometer. Fine-pitch wire chamber trackers and hodoscope counters are installed in the beam spectrometer to accept a high rate beam up to 107 Hz. The superconducting kaon spectrometer for scattered particles was transferred from KEK with modifications to the cryogenic system and detectors. A missing-mass resolution of 1.9 ± 0.1 MeV/c2 (FWHM) was achieved for the Sigma peaks of (pion±, Kaon+) reactions on a proton target in the first physics run of E19 in 2010.
Beam and SKS spectrometers at the K1.8 beam line
BOTTA, Elena;MARCELLO, Simonetta;
2012-01-01
Abstract
High-resolution spectrometers for both incident beams and scattered particles have been con- structed at the K1.8 beam line of the Hadron Experimental Facility at J-PARC. A point-to-point optics is realized between the entrance and exit of QQDQQ magnets for the beam spectrometer. Fine-pitch wire chamber trackers and hodoscope counters are installed in the beam spectrometer to accept a high rate beam up to 107 Hz. The superconducting kaon spectrometer for scattered particles was transferred from KEK with modifications to the cryogenic system and detectors. A missing-mass resolution of 1.9 ± 0.1 MeV/c2 (FWHM) was achieved for the Sigma peaks of (pion±, Kaon+) reactions on a proton target in the first physics run of E19 in 2010.File | Dimensione | Formato | |
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