Performance study of a prototype pure CsI calorimeter for the KOTO experiment

E. Iwai; J. W. Lee; T. Masuda; D. McFarland; Y. Nakaya; Y. D. Ri; K. Sato; K. Shiomi; Y. Sugiyama; Y. Tajima; M. Tecchio; M. Togawa; Y. C. Tung; T. Yamanaka

doi:10.1016/j.nima.2015.02.046

Performance study of a prototype pure CsI calorimeter for the KOTO experiment

E. Iwai, J. W. Lee, T. Masuda, D. McFarland, Y. Nakaya, Y. D. Ri, K. Sato, K. Shiomi, Y. Sugiyama, Y. Tajima, M. Tecchio, M. Togawa, Y. C. Tung, T. Yamanaka

Research Institute for Interdisciplinary Science

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The performance of the CsI electromagnetic calorimeter to be used for the J-PARC E14 KOTO experiment for a rare decay K_L → π⁰ν ν ¯ was studied by using a positron beam from an accelerator. The energy, timing, and position resolutions for energies up to 800 MeV were measured. We also developed a new method to reconstruct the incident angle of photons based on the shower shape recorded with the calorimeter, and evaluated the method to suppress possible backgrounds for K_L → π⁰ν ν ¯ decay signals.

Original language	English
Pages (from-to)	135-141
Number of pages	7
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	786
DOIs	https://doi.org/10.1016/j.nima.2015.02.046
Publication status	Published - Jun 21 2015

Keywords

Electromagnetic calorimeter
K → πν ν ¯
KOTO experiment
Pure CsI

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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Iwai, E., Lee, J. W., Masuda, T., McFarland, D., Nakaya, Y., Ri, Y. D., Sato, K., Shiomi, K., Sugiyama, Y., Tajima, Y., Tecchio, M., Togawa, M., Tung, Y. C., & Yamanaka, T. (2015). Performance study of a prototype pure CsI calorimeter for the KOTO experiment. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 786, 135-141. https://doi.org/10.1016/j.nima.2015.02.046

Performance study of a prototype pure CsI calorimeter for the KOTO experiment. / Iwai, E.; Lee, J. W.; Masuda, T.; McFarland, D.; Nakaya, Y.; Ri, Y. D.; Sato, K.; Shiomi, K.; Sugiyama, Y.; Tajima, Y.; Tecchio, M.; Togawa, M.; Tung, Y. C.; Yamanaka, T.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 786, 21.06.2015, p. 135-141.

Research output: Contribution to journal › Article › peer-review

Iwai, E, Lee, JW, Masuda, T, McFarland, D, Nakaya, Y, Ri, YD, Sato, K, Shiomi, K, Sugiyama, Y, Tajima, Y, Tecchio, M, Togawa, M, Tung, YC & Yamanaka, T 2015, 'Performance study of a prototype pure CsI calorimeter for the KOTO experiment', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 786, pp. 135-141. https://doi.org/10.1016/j.nima.2015.02.046

Iwai, E. ; Lee, J. W. ; Masuda, T. ; McFarland, D. ; Nakaya, Y. ; Ri, Y. D. ; Sato, K. ; Shiomi, K. ; Sugiyama, Y. ; Tajima, Y. ; Tecchio, M. ; Togawa, M. ; Tung, Y. C. ; Yamanaka, T. / Performance study of a prototype pure CsI calorimeter for the KOTO experiment. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2015 ; Vol. 786. pp. 135-141.

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title = "Performance study of a prototype pure CsI calorimeter for the KOTO experiment",

abstract = "The performance of the CsI electromagnetic calorimeter to be used for the J-PARC E14 KOTO experiment for a rare decay KL → π0ν ν ¯ was studied by using a positron beam from an accelerator. The energy, timing, and position resolutions for energies up to 800 MeV were measured. We also developed a new method to reconstruct the incident angle of photons based on the shower shape recorded with the calorimeter, and evaluated the method to suppress possible backgrounds for KL → π0ν ν ¯ decay signals.",

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AU - Iwai, E.

AU - Lee, J. W.

AU - Masuda, T.

AU - McFarland, D.

AU - Nakaya, Y.

AU - Ri, Y. D.

AU - Sato, K.

AU - Shiomi, K.

AU - Sugiyama, Y.

AU - Tajima, Y.

AU - Tecchio, M.

AU - Togawa, M.

AU - Tung, Y. C.

AU - Yamanaka, T.

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AB - The performance of the CsI electromagnetic calorimeter to be used for the J-PARC E14 KOTO experiment for a rare decay KL → π0ν ν ¯ was studied by using a positron beam from an accelerator. The energy, timing, and position resolutions for energies up to 800 MeV were measured. We also developed a new method to reconstruct the incident angle of photons based on the shower shape recorded with the calorimeter, and evaluated the method to suppress possible backgrounds for KL → π0ν ν ¯ decay signals.

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