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Article
GroundBIRD: A CMB Polarization Experiment with MKID Arrays
GroundBIRD is a ground-based experiment for a precise observation of the cosmic microwave background (CMB) polarizations. To achieve high sensitivity at large angular scales, we adopt three features in this ex...
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Article
Development of Large Array of Kinetic Inductance Detectors Using Commercial-Class External Foundries
This study focuses on kinetic inductance detectors (KIDs) fabricated in external foundries using 6 and 8-inch processes. These processes allow us to fabricate large arrays of KIDs in a scalable manner. The sup...
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Article
Superconducting Resonators with Niobium and \({\mathrm{YBa}_{2}\mathrm{Cu}_{3}O_{7-{\delta }}}\) for Alpha-Particle Detectors
For high-energy particle detection at temperatures above 1 K, we investigated two superconducting films: niobium (Nb) and a high-temperature superconductor, namely $${\mathrm{YBa}}_2{\mathrm{Cu}}_3{\mathrm{O}}_{7...
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Article
Irradiation Tests of Superconducting Detectors and Comparison with Simulations
For the future satellite mission at the second sun–earth Lagrangian point (L2), we need to mitigate phonon propagation created by cosmic rays to superconducting detectors. We simulate phonon propagation in sil...
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Article
LiteBIRD: A Satellite for the Studies of B-Mode Polarization and Inflation from Cosmic Background Radiation Detection
LiteBIRD is a candidate satellite for a strategic large mission of JAXA. With its expected launch in the middle of the 2020s with a H3 rocket, LiteBIRD plans to map the polarization of the cosmic microwave bac...
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Article
Concept Study of Optical Configurations for High-Frequency Telescope for LiteBIRD
The high-frequency telescope for LiteBIRD is designed with refractive and reflective optics. In order to improve sensitivity, this paper suggests the new optical configurations of the HFT which have approximat...
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Article
GroundBIRD: Observation of CMB Polarization with a Rapid Scanning and MKIDs
Cosmic microwave background (CMB) radiation is an afterglow from the Big Bang. CMB contains rich information about the early stage of the universe. In particular, odd-parity patterns (B-mode) in the CMB polarizat...
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Article
The LiteBIRD Satellite Mission: Sub-Kelvin Instrument
Inflation is the leading theory of the first instant of the universe. Inflation, which postulates that the universe underwent a period of rapid expansion an instant after its birth, provides convincing explana...
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Article
Water demand for electricity in deep decarbonisation scenarios: a multi-model assessment
This study assesses the effects of deep electricity decarbonisation and shifts in the choice of power plant cooling technologies on global electricity water demand, using a suite of five integrated assessment ...
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Chapter and Conference Paper
Development of Superconducting Tunnel Junction Photon Detectors with Cryogenic Preamplifier for COBAND Experiment
We present the status of the development of Superconducting Tunnel Junction (STJ) detector with the cryogenic preamplifier as far-infrared single photon detector for the COsmic BAckground Neutrino Decay search...
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Article
GroundBIRD: Observing Cosmic Microwave Polarization at Large Angular Scale with Kinetic Inductance Detectors and High-Speed Rotating Telescope
Cosmic microwave background (CMB) is an important source of information about the origin of our universe. In particular, odd-parity large angular scale patterns in the CMB polarization, the primordial B-modes, ar...
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Article
LiteBIRD: Mission Overview and Focal Plane Layout
LiteBIRD is a proposed CMB polarization satellite project to probe the inflationary B-mode signal. The satellite is designed to measure the tensor-to-scalar ratio with a 68 % confidence level uncertainty of ...
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Article
World’s Cheapest Readout Electronics for Kinetic Inductance Detector by Using RedPitaya
The kinetic inductance detector (KID) is a cutting-edge superconducting detector. The number of KID developers is growing. Most of them have switched from their previous study to superconducting technologies. ...
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Article
Open AccessDevelopment of an \(8\times 8\) CPW Microwave Kinetic Inductance Detector (MKID) Array at 0.35 THz
Microwave kinetic inductance detectors (MKIDs) are promising for THz direct detector arrays of large size, particularly with simple frequency-division multiplexing. Purple Mountain Observatory is develo** a ...
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Article
Calibration System with Modulated Polarization Source for Superconducting Detectors at 0.1 K
We developed a calibration system with a modulated polarization source for superconducting detectors at the 0.1-K stage in a dilution cooler. Our target application for this system is detector calibration for ...
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Article
Mission Design of LiteBIRD
LiteBIRD is a next-generation satellite mission to measure the polarization of the cosmic microwave background (CMB) radiation. On large angular scales the B-mode polarization of the CMB carries the imprint of...
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Article
Open AccessDevelopment of Microwave Kinetic Inductance Detectors for a Detection of Phonons
We present a status of the development of microwave kinetic inductance detectors (MKIDs) for a detection of athermal phonons in a substrate. The energy deposited in the substrate is converted to athermal phono...
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Article
Novel Frequency-Domain Multiplexing MKID Readout for the LiteBIRD Satellite
The satellite LiteBIRD (Light satellite for the studies of B-mode polarization and Inflation from cosmic background Radiation Detection) is being designed to detect the B-mode polarization of the cosmic microw...
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Article
Open AccessMeasurement of inclusive jet and dijet cross sections in proton-proton collisions at 7 TeV centre-of-mass energy with the ATLAS detector
Jet cross sections have been measured for the first time in proton-proton collisions at a centre-of-mass energy of 7 TeV using the ATLAS detector. The measurement uses an integrated luminosity of 17 nb−1 recorded...
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Article
Open AccessMeasurement of the W → ℓν and Z/γ * → ℓℓ production cross sections in proton-proton collisions at \( \sqrt {s} = 7\;{\text{TeV}} \) with the ATLAS detector
First measurements of the W → ℓν and Z/γ * → ℓℓ (ℓ = e, μ) production cross sections in proton-proton collisions at
