A new cylindrical photon-veto detector for the KL→π0νν¯ experiment

R. Murayama; M. Togawa; J. K. Ahn; J. Comfort; T. Inagaki; M. Isoe; I. Kamiji; E. J. Kim; J. L. Kim; T. K. Komatsubara; G. Y. Lim; T. Matsumura; K. Miyazaki; H. Nanjo; T. Nomura; H. Okuno; E. Pod; T. Sato; K. Shiomi; Y. Tajima; T. Toyoda; Y. W. Wah; H. Watanabe; T. Yamanaka

doi:10.1016/j.nima.2019.163255

A new cylindrical photon-veto detector for the K_L→π⁰νν¯ experiment

R. Murayama^*
, M. Togawa
, J. K. Ahn
, J. Comfort
, T. Inagaki
, M. Isoe
, I. Kamiji
, E. J. Kim
, J. L. Kim
, T. K. Komatsubara
, G. Y. Lim
, T. Matsumura
, K. Miyazaki
, H. Nanjo
, T. Nomura
, H. Okuno
, E. Pod
, T. Sato
, K. Shiomi
, Y. Tajima

T. Toyoda, Y. W. Wah, H. Watanabe, T. Yamanaka

^*Corresponding author for this work

Department of Physics

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

5 Citations (Scopus)

Abstract

The J-PARC KOTO experiment aims to explore new physics beyond the Standard Model through the K_L→π⁰νν¯ decay. We installed a new photon-veto detector, named the Inner Barrel (IB), to improve the detection efficiency and the timing resolution for photons in the region transverse to the neutral beam. The IB is a 2.8-m-long cylindrical detector with a 1.5 m inner diameter. The IB is a lead-scintillator sampling shower counter with a 5-radiation-length thickness and with a low mass support structure, and fits inside the 14-radiation-length-thick cylindrical detector. Scintillating light is read out from both ends via wavelength shifting fibers with a short decay time. The design, construction and performance of the IB are presented in this paper.

Original language	English
Article number	163255
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	953
DOIs	https://doi.org/10.1016/j.nima.2019.163255
Publication status	Published - 2020 Feb 11

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

Keywords

Kaon rare decay
Photon veto
Wavelength shifting (WLS) fiber

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

Access to Document

10.1016/j.nima.2019.163255

Cite this

Murayama, R., Togawa, M., Ahn, J. K., Comfort, J., Inagaki, T., Isoe, M., Kamiji, I., Kim, E. J., Kim, J. L., Komatsubara, T. K., Lim, G. Y., Matsumura, T., Miyazaki, K., Nanjo, H., Nomura, T., Okuno, H., Pod, E., Sato, T., Shiomi, K., ... Yamanaka, T. (2020). A new cylindrical photon-veto detector for the K_L→π⁰νν¯ experiment. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 953, Article 163255. https://doi.org/10.1016/j.nima.2019.163255

Murayama, R, Togawa, M, Ahn, JK, Comfort, J, Inagaki, T, Isoe, M, Kamiji, I, Kim, EJ, Kim, JL, Komatsubara, TK, Lim, GY, Matsumura, T, Miyazaki, K, Nanjo, H, Nomura, T, Okuno, H, Pod, E, Sato, T, Shiomi, K, Tajima, Y, Toyoda, T, Wah, YW, Watanabe, H & Yamanaka, T 2020, 'A new cylindrical photon-veto detector for the K_L→π⁰νν¯ experiment', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 953, 163255. https://doi.org/10.1016/j.nima.2019.163255

@article{791080b6214b462fb24925678a8826ec,

title = "A new cylindrical photon-veto detector for the KL→π0νν¯ experiment",

abstract = "The J-PARC KOTO experiment aims to explore new physics beyond the Standard Model through the KL→π0νν¯ decay. We installed a new photon-veto detector, named the Inner Barrel (IB), to improve the detection efficiency and the timing resolution for photons in the region transverse to the neutral beam. The IB is a 2.8-m-long cylindrical detector with a 1.5 m inner diameter. The IB is a lead-scintillator sampling shower counter with a 5-radiation-length thickness and with a low mass support structure, and fits inside the 14-radiation-length-thick cylindrical detector. Scintillating light is read out from both ends via wavelength shifting fibers with a short decay time. The design, construction and performance of the IB are presented in this paper.",

keywords = "Kaon rare decay, Photon veto, Wavelength shifting (WLS) fiber",

author = "R. Murayama and M. Togawa and Ahn, \{J. K.\} and J. Comfort and T. Inagaki and M. Isoe and I. Kamiji and Kim, \{E. J.\} and Kim, \{J. L.\} and Komatsubara, \{T. K.\} and Lim, \{G. Y.\} and T. Matsumura and K. Miyazaki and H. Nanjo and T. Nomura and H. Okuno and E. Pod and T. Sato and K. Shiomi and Y. Tajima and T. Toyoda and Wah, \{Y. W.\} and H. Watanabe and T. Yamanaka",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2020",

month = feb,

day = "11",

doi = "10.1016/j.nima.2019.163255",

language = "English",

volume = "953",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - A new cylindrical photon-veto detector for the KL→π0νν¯ experiment

AU - Murayama, R.

AU - Togawa, M.

AU - Ahn, J. K.

AU - Comfort, J.

AU - Inagaki, T.

AU - Isoe, M.

AU - Kamiji, I.

AU - Kim, E. J.

AU - Kim, J. L.

AU - Komatsubara, T. K.

AU - Lim, G. Y.

AU - Matsumura, T.

AU - Miyazaki, K.

AU - Nanjo, H.

AU - Nomura, T.

AU - Okuno, H.

AU - Pod, E.

AU - Sato, T.

AU - Shiomi, K.

AU - Tajima, Y.

AU - Toyoda, T.

AU - Wah, Y. W.

AU - Watanabe, H.

AU - Yamanaka, T.

PY - 2020/2/11

Y1 - 2020/2/11

N2 - The J-PARC KOTO experiment aims to explore new physics beyond the Standard Model through the KL→π0νν¯ decay. We installed a new photon-veto detector, named the Inner Barrel (IB), to improve the detection efficiency and the timing resolution for photons in the region transverse to the neutral beam. The IB is a 2.8-m-long cylindrical detector with a 1.5 m inner diameter. The IB is a lead-scintillator sampling shower counter with a 5-radiation-length thickness and with a low mass support structure, and fits inside the 14-radiation-length-thick cylindrical detector. Scintillating light is read out from both ends via wavelength shifting fibers with a short decay time. The design, construction and performance of the IB are presented in this paper.

AB - The J-PARC KOTO experiment aims to explore new physics beyond the Standard Model through the KL→π0νν¯ decay. We installed a new photon-veto detector, named the Inner Barrel (IB), to improve the detection efficiency and the timing resolution for photons in the region transverse to the neutral beam. The IB is a 2.8-m-long cylindrical detector with a 1.5 m inner diameter. The IB is a lead-scintillator sampling shower counter with a 5-radiation-length thickness and with a low mass support structure, and fits inside the 14-radiation-length-thick cylindrical detector. Scintillating light is read out from both ends via wavelength shifting fibers with a short decay time. The design, construction and performance of the IB are presented in this paper.

KW - Kaon rare decay

KW - Photon veto

KW - Wavelength shifting (WLS) fiber

UR - https://www.scopus.com/pages/publications/85076792064

U2 - 10.1016/j.nima.2019.163255

DO - 10.1016/j.nima.2019.163255

M3 - Article

AN - SCOPUS:85076792064

SN - 0168-9002

VL - 953

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

M1 - 163255

ER -