T. Kishishita
A5055103518- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Advanced Semiconductor Detectors and Materials
- Advancements in Semiconductor Devices and Circuit Design
- Astrophysical Phenomena and Observations
- Muon and positron interactions and applications
- Dark Matter and Cosmic Phenomena
- Radiation Effects in Electronics
- Gamma-ray bursts and supernovae
- Nuclear Physics and Applications
- Advanced X-ray and CT Imaging
- Radio Astronomy Observations and Technology
- Neutrino Physics Research
- Pulsars and Gravitational Waves Research
- Silicon Carbide Semiconductor Technologies
- Atomic and Subatomic Physics Research
- Astronomical Observations and Instrumentation
- Silicon and Solar Cell Technologies
- Advancements in PLL and VCO Technologies
- Analog and Mixed-Signal Circuit Design
- Electronic and Structural Properties of Oxides
- Calibration and Measurement Techniques
High Energy Accelerator Research Organization
2018-2024
Institute of Particle and Nuclear Studies
2024
The Graduate University for Advanced Studies, SOKENDAI
2020-2023
University of Bonn
2010-2021
Open Source Drug Discovery
2021
Ibaraki University
2020
Kyushu University
2020
The Open University of Japan
2019
Japan Proton Accelerator Research Complex
2017
Heidelberg University
2015
The Hard X-ray Detector (HXD) on board Suzaku covers a wide energy range from 10 keV to 600 by combination of silicon PIN diodes and GSO scintillators. HXD is designed achieve an extremely low in-orbit back ground based new techniques, including the concept well-type active shield counter. With effective area 142 cm^2 at 20 273 cm2 150 keV, background level sea reached ~1x10^{-5} cts s^{-1} cm^{-2} keV^{-1} 30 for PI N diodes, ~2x10^{-5} 100 ~7x10^{-6} 200 phoswich Tight shielding results in...
Abstract The in-orbit performance and calibration of the Hard X-ray Detector (HXD) on board astronomy satellite Suzaku are described. Its basic performances, including a wide energy bandpass 10–600 keV, resolutions $\sim 4 \,\mathrm{keV}$ (FWHM) at 40 keV 11\%$ 511 high background rejection efficiency, have been confirmed by extensive calibrations. long-term gains PIN-Si diodes stable within 1% for half year, those scintillators decreased 5–20%. residual non-X-ray HXD is lowest among past...
This paper introduces a new approach to measure the muon magnetic moment anomaly |$a_{\mu} = (g-2)/2$| and electric dipole (EDM) |$d_{\mu}$| at J-PARC facility. The goal of our experiment is |$a_{\mu}$| using an independent method with factor 10 lower momentum, 20 smaller diameter storage-ring solenoid compared previous ongoing |$g-2$| experiments unprecedented quality storage field. Additional significant differences from present experimental include 1000 transverse emittance beam...
We present γ-ray observations with the Large Area Telescope (LAT) on board Fermi Gamma-Ray Space of nearby radio galaxy Centaurus A (Cen A). The previous EGRET detection is confirmed, and localization improved using data from first 10 months science operation. In work, we presented lobes by LAT; in this concentrate core Cen A. Flux levels as seen LAT are not significantly different that found EGRET, nor extremely soft spectrum (Γ = 2.67 ± 0.10stat 0.08sys where photon flux Φ ∝ E−Γ)....
We present results obtained from a series of observations the supernova remnant RX J1713.7-3946 by Suzaku satellite. The cover about two-thirds surface. successfully detected hard X-rays up to ~ 40 keV each pointing. X-ray spectra are described power-law functions with photon indices 3.0, which larger than those in energy region below 10 keV. Connection spatially-integrated XIS and HXD clearly reveals spectral cutoff 0.4--40 spectrum. This is interpreted correspond maximum acceleration...
Energetic young pulsars and expanding blast waves (supernova remnants, SNRs) are the most visible remains after massive stars, ending their lives, explode in core-collapse supernovae. The Fermi Gamma-Ray Space Telescope has unveiled a radio quiet pulsar located near center of compact synchrotron nebula inside supernova remnant CTA 1. pulsar, discovered through its gamma-ray pulsations, period 316.86 ms, derivative 3.614 x 10-13 s s-1 . Its characteristic age 104 years is comparable to that...
We report on the results from Suzaku broadband X-ray observations of galactic binary source LS5039. The data, which have continuous coverage more than one orbital period, show strong modulation emission at period this TeV gamma-ray emitting system.The shows a minimum phase ~ 0.1, close to so-called superior conjunction compact object, and maximum ~0.7, very inferior object. spectral data up 70 keV are described by hard power-law with phase-dependent photon index varies within Gamma ~1.45 -...
Abstract We have developed a prototype of the muon beam monitor ( μ BM) for COMET experiment at J-PARC. The aims to search neutrino-less muon-to-electron conversion event in field nucleus, as charged lepton flavor violation process. SiC-based BM will be installed vacuum chamber and located front muon-stopping target main central drift chamber. detector consists SiC PN-diodes dedicated readout electronics. By tailing 256 sensors matrix, profile bunch stability can extracted, then, are...
Abstract Recently, the multi-kton Liquid Argon Time Projection Chamber (LAr-TPC) has been developed to conduct neutrino oscillation and nucleon decay search experiments. Accordingly, necessity of high functional electronics for LAr-TPC increasing. The used in is needed operate stably at cryogenic temperature (89 K). Thus, we have developing analog front-end termed as LTARS, making improvements. latest version this LTARS series, LTAR16A, fabricated a TSMC 180 nm process. ASIC includes on...
Abstract Targeting a peak luminosity of 6 × 10 35 cm -2 s -1 , the Belle II experiment at SuperKEKB in Japan is considering an upgrade its interaction region. This involves vertex detector, which will be replaced by new fully pixelated detector (VTX). A monolithic CMOS pixel sensor named OBELIX (Optimized BELle pIXel) proposed to used VTX. Based on existing TJ-Monopix2 chip initially developed for ATLAS Inner Tracker (ITk) upgrade, designed 180 nm process with improved matrix and additional...
The hard X-ray detector (HXD-II) is one of the three scientific instruments onboard Japanese astronomy satellite Astro-E2 scheduled to be launched in 2005. This mission very unique a point having lower background than any other past missions 10-600 keV range. In HXD-II, large and thick BGO crystals are used as active shields for particle gamma-ray main detector. They have wide field view ~2pi effective area 400 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Monolithic Active Pixel Sensors (MAPS) have been developed since the late 1990s based on silicon substrates with a thin epitaxial layer (thickness of 10–15 μm) in which charge is collected an electrode, albeit by disordered and slow diffusion rather than drift directed electric field. As consequence, signal these conventional MAPS small (≈1000 e−) radiation tolerance limited. In this paper, development fully Depleted (DMAPS) high resistivity substrate allowing creation depleted detection...
A 10 kilo-tonne dual-phase liquid argon TPC is one of the detector options considered for Deep Underground Neutrino Experiment (DUNE). The technology relies on amplification ionisation charge in ultra-pure vapour and offers several advantages compared to traditional single-phase TPCs. 4.2 tonne prototype, largest its kind, with an active volume \three has been constructed operated at CERN. In this paper we describe detail experimental setup components as well report operation experience. We...
The DEPFET collaboration develops highly granular, ultra-transparent active pixel detectors for high-performance vertex reconstruction at future collider experiments. characterization of detector prototypes has proven that the key principle, integration a first amplification stage in detector-grade sensor material, can provide comfortable signal to noise ratio over 40 thickness 50-75 $\mathrm{\mathbf{\mu m}}$. ASICs have been designed and produced operate with required read-out speed. A...
Abstract The Belle II collaboration has initiated a program to upgrade its detector in order address the challenges set by increase of SuperKEKB collider luminosity, targeting 6×10 35 cm 2 s -1 . A monolithic CMOS pixel sensor named OBELIX (Optimized BELle pIXel) is proposed equip 5 detection layers upgrading current vertex detector. Based on existing TJ-Monopix2, currently designed 180 nm process.
We report on long-term stability of X-ray modulation apparently synchronized with an orbital period 3.9 days in the gamma-ray binary LS 5039. Recent observations Suzaku satellite year 2007, which covered continuously more than one period, have provided us detailed characterization flux and spectral shape as a function phase. Motivated by results from Suzaku, we re-analyzed data obtained ASCA, XMM-Newton, Chandra between 1999 2005, to investigate behavior 5039 band. found that curves...
This paper is a review of recent progress RD53 Collaboration. Results obtained on the study radiation effects 65 nm CMOS have matured enough to define first strategies adopt in design analog and digital circuits. Critical building blocks very front end chains been designed, tested before after 5–800 Mrad. Small prototypes 64×64 pixels with complex architectures produced, point address main issues dealing extremely high pixel rates, while operating at small in-time thresholds end. The...
We report on the recent development of a 32-channel low-noise analog front-end ASIC "KW03" for hard X-ray and gamma-ray detectors. The aims readout strip or pixel (pad) detectors utilizing silicon cadmium telluride (CdTe) as detector materials. Each channel includes charge-sensitive amplifier, bandpass filters sample-and-hold circuit. It also leakage current compensation pole-zero cancellation circuits to meet various requirements. equivalent noise level typical reaches 89 e <sup...
The use of Silicon-on-Insulator (SOI) technology as a particle detector in high radiation environment is, at present, limited mostly by effects on the transistor characteristics, back gate effect, and mutual coupling between Buried Oxide (BOX) sensor. We have fabricated tested new 0.18μm SOI CMOS monolithic pixel sensor using XFAB process. In contrast to most commonly used technologies, this particular uses partially depleted transistors, offering double well structure, which shields thin...
A front-end ASIC with spectroscopic capability was developed to construct a prototype CdTe pixel detector for future use in focusing hard X-ray telescopes. The is designed hybrid configuration, where each sensor vertically connected corresponding cell fabricated the readout ASIC. chip consists of 12 × matrix identical 270×270 μm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> cells, and implemented TSMC 0.35 CMOS technology. low noise...
The supernova remnant (SNR) RX J0852-4622 (Vela Jr., G266.6-1.2) is one of the most important SNRs for investigating acceleration multi-TeV particles and origin Galactic cosmic rays because its strong synchrotron X-ray TeV gamma-ray emission, which show a shell-like morphology similar to each other. Using XMM-Newton archival data consisting multiple pointing observations northwestern rim remnant, we investigate spatial properties nonthermal emission as function distance from an outer shock...
New monolithic pixel detectors integrating CMOS electronics and sensor on the same silicon substrate are currently explored for particle tracking in future HEP experiments, most notably at LHC . The innovative concept of Depleted Monolithic Active Pixel Sensors (DMAPS) is based high resistive bulk material enabling full depletion application an electrical drift field fast charge collection, while retaining capability electronics. technology (150 nm) used offers quadruple wells allows to...