The Korean Physical Society 06130 22, Teheran-ro 7-gil, Gangnam-gu, Seoul, Republic of Korea 610 Representation : Tae Won NOH TEL: 02-556-4737 FAX: 02-554-1643 E-mail : Copyright(C) KPS, All rights reserved.
30 May 2022 to 4 June 2022
Virtual Seoul
Asia/Seoul timezone

Development of pulse shape discrimination (PSD) for removing fast neutrons in the JSNS^2

Not scheduled
Virtual Seoul

Virtual Seoul

Poster Sterile neutrinos Poster


The J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source (JSNS^2) experiment has started in 2020. We took data with long physics run from 2021 to present and several analyses with the data are on-going. From the analyses, we found that the largest background is coming from fast neutrons induced by cosmic rays. In order to reduce the background, we dissolved diisopropyl-naphthalene (DIN) in the Gd-loaded liquid scintillator (GdLS) by 10% of weight and we started to develop an effective pulse shape discrimination (PSD) algorithm. The current PSD capability is as follows: the rejection power of fast neutron is more than 95 % while the signal efficiency is more than 90 %. In this presentation, details of hardware development, methodology of PSD and PSD capability will be described.

Collaboration JSNS^2

Primary author

Taku Dodo (Tohoku University)

Presentation Materials