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SPIROS: Streamlined, Precise, Intuitive, and Rapid Optical Simulator for particle physics detectors
Tatsuya Kikawa
This paper presents SPIROS (Streamlined, Precise, Intuitive, and Rapid Optical Simulator), a dedicated optical simulation tool developed for the design and analysis of particle phy…
Design and Performance of a Monolithic Plastic Scintillator Tracker with Embedded Scatterers
Naoki Otani, Seungho Han, Shun Ito +4
We propose a new scintillator-based tracker concept based on a monolithic plastic scintillator plate with embedded scatterers and wavelength-shifting fiber readout. The embedded sc…
Semiautomatic dimensional screening of plastic scintillator cubes using image analysis and robotics
Tatsuya Kikawa, Mao Tani, Atsuko K. Ichikawa +3
Large-scale particle physics detectors often contain millions of repeated components, making precise and efficient quality control essential. We have developed a semiautomatic syst…
Introducing a Markov Chain-Based Time Calibration Procedure for Multi-Channel Particle Detectors: Application to the SuperFGD and ToF Detectors of the T2K Experiment
S. Abe, H. Alarakia-Charles, I. Alekseev +190
Inter-channel mis-synchronisation can be a limiting factor to the time resolution of high performance timing detectors with multiple readout channels and independent electronics un…
A 3D segmented Water-based Liquid Scintillator for high-precision detection of neutrinos in water
Botao Li, Daria Borodulina, Davide Sgalaberna +8
Precision detection of neutrino-nucleus interactions in water with the complete detection of the final state, including leptons and hadrons, is challenging due to water being a non…
In-situ high voltage generation with Cockcroft-Walton multiplier for xenon gas time projection chamber
Shinichi Akiyama, Junya Hikida, Masashi Yoshida +17
We have newly developed a Cockcroft-Walton (CW) multiplier that can be used in a gas time projection chamber (TPC). A TPC requires a high voltage to form an electric field that dri…
Performance evaluation of electron multiplier tubes as a high-intensity muon beam monitor of accelerator neutrino experiments
Takashi Honjo, Yosuke Ashida, Oderich F. Auersperg-Castell +22
Upgrade work towards increasing the beam intensity of the neutrino beamline at J- PARC is underway. Monitoring tertiary muon beams is essential for stable operation of the beamline…
Second gadolinium loading to Super-Kamiokande
K. Abe, C. Bronner, Y. Hayato +246
The first loading of gadolinium (Gd) into Super-Kamiokande in 2020 was successful, and the neutron capture efficiency on Gd reached 50\%. To further increase the Gd neutron capture…
High-pressure xenon gas time projection chamber with scalable design and its performance at around the Q value of Xe double-beta decay
Masashi Yoshida, Kazuhiro Nakamura, Shinichi Akiyama +18
We have been developing a high-pressure xenon gas time projection chamber (TPC) to search for neutrinoless double beta () decay of Xe. The unique feature of this TPC…
Scintillator ageing of the T2K near detectors from 2010 to 2021
The T2K Collaboration, K. Abe, N. Akhlaq +355
The T2K experiment widely uses plastic scintillator as a target for neutrino interactions and an active medium for the measurement of charged particles produced in neutrino interac…
Momentum reconstruction of charged particles using multiple Coulomb scatterings in a nuclear emulsion detector
Takahiro Odagawa, Yosuke Suzuki, Tsutomu Fukuda +6
This paper describes a new method for momentum reconstruction of charged particles using multiple Coulomb scatterings in a nuclear emulsion detector with a layered structure of nuc…
Total Neutron Cross-section Measurement on CH with a Novel 3D-projection Scintillator Detector
A. Agarwal, H. Budd, J. Capo +59
In order to extract neutrino oscillation parameters, precision long-baseline neutrino oscillation experiments rely on detailed models of neutrino interactions with nuclei. These mo…
Design and performance of a scintillation tracker for track matching in nuclear-emulsion-based neutrino interaction measurement
Takahiro Odagawa, Tsutomu Fukuda, Ayami Hiramoto +7
Precise measurement of neutrino-nucleus interactions with an accelerator neutrino beam is highly important for current and future neutrino oscillation experiments. To measure muon-…
First Gadolinium Loading to Super-Kamiokande
K. Abe, C. Bronner, Y. Hayato +212
In order to improve Super-Kamiokande's neutron detection efficiency and to thereby increase its sensitivity to the diffuse supernova neutrino background flux, 13 tons of $\rm Gd_2(…
The Hyper-Kamiokande Experiment -- Snowmass LOI
Kamiokande Collaboration, K. Abe, P. Adrich +387
Hyper-Kamiokande is the next generation underground water Cherenkov detector that builds on the highly successful Super-Kamiokande experiment. The detector which has an 8.4~times l…
Design and performance of a high-pressure xenon gas TPC as a prototype for a large-scale neutrinoless double-beta decay search
S. Ban, M. Hirose, A. K. Ichikawa +16
A high-pressure xenon gas time projection chamber, with a unique cellular readout structure based on electroluminescence, has been developed for a large-scale neutrinoless double-b…
Optimizing neutron moderators for a spallation-driven ultracold-neutron source at TRIUMF
W. Schreyer, C. A. Davis, S. Kawasaki +5
We report on our efforts to optimize the geometry of neutron moderators and converters for the TRIUMF UltraCold Advanced Neutron (TUCAN) source using MCNP simulations. It will use…
AXEL: High-pressure Xe gas TPC for BG-free decay search
S. Obara, S. Ban, M. Hirose +15
AXEL is a high-pressure xenon gas time projection chamber for neutrinoless double-beta decay (0n2b) search. The AXEL has a unique readout system called ELCC which has a cellular st…
J-PARC Neutrino Beamline Upgrade Technical Design Report
K. Abe, H. Aihara, A. Ajmi +381
In this document, technical details of the upgrade plan of the J-PARC neutrino beamline for the extension of the T2K experiment are described. T2K has proposed to accumulate data c…
First ultracold neutrons produced at TRIUMF
S. Ahmed, E. Altiere, T. Andalib +50
We installed a source for ultracold neutrons at a new, dedicated spallation target at TRIUMF. The source was originally developed in Japan and uses a superfluid-helium converter co…
Sensitivity of Fields Generated within Magnetically Shielded Volumes to Changes in Magnetic Permeability
T. Andalib, J. W. Martin, C. P. Bidinosti +4
Future experiments seeking to measure the neutron electric dipole moment (nEDM) require stable and homogeneous magnetic fields. Normally these experiments use a coil internal to a…
PENTrack---a simulation tool for ultracold neutrons, protons, and electrons in complex electromagnetic fields and geometries
Wolfgang Schreyer, Tatsuya Kikawa, Martin J. Losekamm +2
Modern precision experiments trapping low-energy particles require detailed simulations of particle trajectories and spin precession to determine systematic measurement limitations…
Measurement of the muon beam direction and muon flux for the T2K neutrino experiment
K. Suzuki, S. Aoki, A. Ariga +30
The Tokai-to-Kamioka (T2K) neutrino experiment measures neutrino oscillations by using an almost pure muon neutrino beam produced at the J-PARC accelerator facility. The T2K muon m…
Calibration of the Super-Kamiokande Detector
K. Abe, Y. Hayato, T. Iida +130
Procedures and results on hardware level detector calibration in Super-Kamiokande (SK) are presented in this paper. In particular, we report improvements made in our calibration me…