A5043851126- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Superconducting and THz Device Technology
- Radio Astronomy Observations and Technology
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Radiation Effects in Electronics
- Astrophysics and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Black Holes and Theoretical Physics
- Advancements in Battery Materials
- Physics of Superconductivity and Magnetism
- Magnetic properties of thin films
- Semiconductor materials and devices
- Extraction and Separation Processes
- Plasma Diagnostics and Applications
- Atomic and Subatomic Physics Research
- Metal and Thin Film Mechanics
- Advanced Battery Technologies Research
University of Tsukuba
2015-2024
Hirosaki University
2018-2024
High Energy Accelerator Research Organization
2016-2023
Kyoto University
2020-2023
Nagoya Institute of Technology
2020-2022
Instituto de Astrofísica de Canarias
2022
Nagoya University
2021
The University of Adelaide
2016-2020
Université Grenoble Alpes
2020
Centre National de la Recherche Scientifique
2019-2020
We search for the dark photon matter (DPDM) using a cryogenic millimeter-wave receiver. DPDM has kinetic coupling with electromagnetic fields constant of χ and is converted into ordinary photons at surface metal plate. signal this conversion in frequency range 18-26.5 GHz, which corresponds to mass 74-110 μeV/c^{2}. observed no significant excess, allowing us set an upper bound χ<(0.3-2.0)×10^{-10} 95% confidence level. This most stringent constraint date tighter than cosmological...
This paper presents recent advances in a 3-D inverse scattering technique, called forward-backward time-stepping (FBTS), applied to the reconstruction of microwave properties breast. The FBTS algorithm is utilized for numerical-based study breast model based on an MRI. Several illumination schemes, different transmitter/receiver configurations, are compared quality reconstructed images model. A combination cylindrical and planar arrays shown provide accurate estimates electrical parameters...
Abstract The demand for Li-ion batteries (LIBs) use in electric vehicles, which is key to realizing a decarbonized society, accelerating. However, the supply of Li resources has recently become major issue, thereby necessitating development economical and sustainable technologies brine/seawater-based extraction recycling from spent LIBs. This paper presents an innovative electrochemical pumping technology based on new cell structure extraction/recovery. system can provide large driving...
Concentrating 6Li isotopes, which exist only approximately 7.6% in nature, to 40 90%, is necessary for development of thermal fusion reactors, are promising as next-generation base-load energy systems. We investigated the possibility enrichment by electrochemical pumping using La0.57Li0.29TiO3 solid lithium electrolytes. also clarified influence potential application profiles on separation efficiency. Giving a difference electrodes prepared both sides electrolyte made electrode solution side...
Abstract Understanding telescope pointing (i.e. line of sight) is important for observing the cosmic microwave background (CMB) and astronomical objects. The Moon a candidate source calibration. Although visible size (30′) larger than that planets, we can frequently observe once month with high signal-to-noise ratio. We developed method performing calibration using observational data from Moon. considered tilts axes as well encoder collimation offsets In addition, evaluated effects...
Dark photons have been considered potential candidates for dark matter. The photon matter (DPDM) has a mass and interacts with electromagnetic fields via kinetic mixing coupling constant of $\ensuremath{\chi}$. Thus, DPDMs are converted into ordinary at metal surfaces. Using millimeter-wave receiver set in radioshielding box, we performed experiments to detect the conversion from DPDM frequency range 10--18 GHz, which corresponds $41--74\text{ }\text{ }\mathrm{\ensuremath{\mu}}\mathrm{eV}$....
Nanoimprint lithography (NIL) is considered to be a sustainable technology for fabricating fine patterns and 3D structure of semiconductor devices. In this paper, we report preliminary results device qualification dual damascene fabricated by NIL. We have optimized NIL conditions improve defectivity overlay accuracy, etching condition fidelity uniformity shape on the entire wafer. The 1st electrical characteristic confirm possibilities one step fabrication using
DC plasma etching experiments were performed on thin wafers of polycrystalline Si, using a pulse injection technique developed earlier, with or mixtures as etchants. The addition was found to have no measurable effect the rate, and steady‐state concentrations various radicals present in shifted relatively little. A fairly simple reaction scheme is presented which consistent these results. rates measured after oxidizing nitriding Si surface by methods explored some extent well.
We are developing monolithic pixel sensors based on a 0.2 µm fully-depleted Silicon-on-Insulator (SOI) technology.SOI have properties such as high-speed operation, low-power dissipation, and SEU/SET immunity.The major issues applying them in high-radiation environments the total ionization dose (TID) effects.The effects rather substantial SOI devices since transistors enclosed oxide layers where generated holes trapped affect operation of near-by transistors.Double that provide an...
We have been developing a monolithic pixel sensor for the International Linear Collider (ILC) vertex detector with 0.2 μm FD-SOI CMOS process by LAPIS Semiconductor Co., Ltd. aim to achieve 3 single-point resolution required ILC 20×20 μm2 pixel. Beam bunch crossing at occurs every 554 ns in 1-msec-long trains an interval of 200 ms. Each must record charge and time stamp hit identify collision event reconstruction. Necessary functions include amplifier, comparator, shift register, analog...
Abstract We compute the expected sensitivity on measurements of optical depth to reionization for a ground-based experiment at Teide Observatory. simulate polarized partial sky maps GroundBIRD frequencies 145 and 220 GHz. perform fits simulated with our pixel-based likelihood extract reionization. The noise levels polarization are estimated as 110 <?CDATA $\mu {\rm{K}}\,\mathrm{arcmin}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>μ</mml:mi> <mml:mi...
A microwave kinetic inductance detector (MKID) is a cutting-edge superconducting detector. It comprises resonator circuit constructed with film on dielectric substrate. To expand its field of application, it important to establish method suppress the two-level system (TLS) noise that caused by electric fluctuations between two energy states at surface The density can be decreased expanding strip width (S) and gap from ground plane (W) in MKID circuit, allowing suppression TLS noise. However,...
We are developing a resonator-based superconducting camera, microwave kinetic inductance detector (MKID) for application to radio astronomy.MKID has the intrinsic potential realize over 10000 pixels of camera because all resonators can be coupled single feed line by setting different resonant frequencies.The large number deep observations in short time each astronomical object, as well wide sky realistic duration with reasonable sensitivity high-z galaxy explorations.A 109 MKID 100 GHz...
The observations at the 100 GHz frequency band evaluate thermal dust radiations and free-free emission characteristics of star-formation regions in Milky Way. In our collaboration, continuum camera with microwave kinetic inductance detector (MKIDs) is being developed for sub-millimeter astronomy. MKID a resonator-based superconducting having an intrinsic potential to get over 1,000 pixels one readout line. This large number can realize high sensitivity wide sky coverage observe detailed...