K. Fushimi, D. Chernyak, H. Ejiri, K. Hata, R. Hazama, T. Iida, H. Ikeda, K. Imagawa, K. Inoue, H. Ito, T. Kisimoto, M. Koga, K. Kotera, A. Kozlov, S. Kurosawa,… 展开作者
K. Fushimi, D. Chernyak, H. Ejiri, K. Hata, R. Hazama, T. Iida, H. Ikeda, K. Imagawa, K. Inoue, H. Ito, T. Kisimoto, M. Koga, K. Kotera, A. Kozlov, S. Kurosawa, K. Nakamura, R. Orito, A. Sakaguchi, A. Sakaue, T. Shima, Y. Takaku, Y. Takemoto, S. Umehara, Y. Urano, Y. Yamamoto, K. Yasuda, S. Yoshida
发表信息：
Proceedings of the 37th Workshop on Radiation Detectors and Their Uses, KEK Proceedings 2023-1, (2024), p43
The existence of cosmic dark matter and neutrino properties are long-standing problems in cosmology and particle physics. These problems have been investigated by using radiation detectors. We will discuss the application of inorganic crystal scintillators to studies on dark matter and neutrino properties. A large volume and high-purity inorganic crystal is a promising detector for investigating dark matter and neutrino.
PICOLON (Pure Inorganic Crystal Observatory for LOw-energy Neutr(al)ino) aims to search for cosmic dark matter by high purity NaI(Tl) scintillator. We developed extremely pure NaI(Tl) crystal by hybrid purification method. The recent result of $^{210}$Pb in our NaI(Tl) is less than 5.7 $μ$Bq/kg. We will report the test experiment in the low-background measurement at Kamioka Underground Laboratory. The sensitivity for annual modulating signals and finding dark matter particles will be discussed.
The highly radiopure NaI(Tl) was developed to search for particle candidates of dark matter. The optimized methods were combined to reduce various radioactive impurities. The $^{40}$K was effectively reduced by the re-crystallization method. The progenies of the decay chains of uranium and thorium were reduced by appropriate resins. The concentration of natural potassium in NaI(Tl) crystal was reduced down to 20 ppb. Concentrations of alpha-ray emitters were successfully reduced by appropriate selection of resin. The present concentration of thorium series and 226Ra were $1.2 \pm1.4$ $μ$Bq/kg …
The Cosmic-Ray Extremely Distributed Observatory (CREDO) is a project dedicated to global studies of extremely extended cosmic-ray phenomena, the cosmic-ray ensembles (CRE), beyond the capabilities of existing detectors and observatories. Up to date cosmic-ray research has been focused on detecting single air showers, while the search for ensembles of cosmic-rays, which may overspread a significant fraction of the Earth, is a scientific terra incognita. Instead of developing and commissioning a completely new global detector infrastructure, CREDO proposes approaching the global cosmic-ray anal…
我们介绍了LAUE的现状，该项目由意大利航天局（ASI）支持，致力于开发用于硬X射线/软伽马射线天文学（80-600 keV）的长焦距（可达100米）劳厄透镜。由于它们的聚焦能力，设计目标是将当前仪器在上述能带中的灵敏度提高2个数量级，低至$10^{-8}$光子/（cm $^2$ s keV）的几倍。
The Maunakea Spectroscopic Explorer (MSE) project has completed its Conceptual Design Phase. This paper is a status report of the MSE project regarding its technical and programmatic progress. The technical status includes its conceptual design and system performance, and highlights findings and recommendations from the System and various subsystems design reviews. The programmatic status includes the project organization and management plan for the Preliminary Design Phase. In addition, this paper provides the latest information related to the permitting process for Maunakea construction.
MagAO-X is an entirely new "extreme" adaptive optics system for the Magellan Clay 6.5 m telescope, funded by the NSF MRI program starting in Sep 2016. The key science goal of MagAO-X is high-contrast imaging of accreting protoplanets at H$α$. With 2040 actuators operating at up to 3630 Hz, MagAO-X will deliver high Strehls (>70%), high resolution (19 mas), and high contrast ($< 1\times10^{-4}$) at H$α$ (656 nm). We present an overview of the MagAO-X system, review the system design, and discuss the current project status.
The Italian institute for nuclear physics (INFN) has financed the SIMP project (2019-2021) in order to strengthen its skills and technologies in the field of meV detectors with the ultimate aim of developing a single microwave photon detector. This goal will be pursued by improving the sensitivity and the dark count rate of two types of photodetectors: current biased Josephson Junction (JJ) for the frequency range 10-50 GHz and Transition Edge Sensor (TES) for the frequency range 30-100 GHz. Preliminary results on materials and devices characterization are presented.
Gravitational wave (GW) detection in space probes GW spectrum that is inaccessible from the Earth. In addition to LISA project led by European Space Agency, and the DECIGO detector proposed by the Japan Aerospace Exploration Agency, two Chinese space-based GW observatories -- TianQin and Taiji -- are planned to be launched in the 2030s. TianQin has a unique concept in its design with a geocentric orbit. Taiji's design is similar to LISA, but is more ambitious with longer arm distance. Both facilities are complementary to LISA, considering that TianQin is sensitive to higher frequencies and Tai…
The ASTRI Project: prototype status and future plans for a Cherenkov dual-mirror small-telescope array
应科院（Astrofisica con Specchi a Tecnologia Replicante Italiana）是意大利教育、大学和研究部的旗舰项目。在这一框架内，国家航空航天研究所目前正在开发CTA小型望远镜的宽视场（直径9.6度）端对端原型，专门用于研究从几分之一TeV到几十TeV的能量范围，并计划于2014年开始数据采集。为了获得紧凑的光学结构，切伦科夫望远镜将首次采用双反射镜Schwarzschild-Couder光学设计。第二个具有挑战性但创新的技术解决方案包括基于硅光电倍增器的模块化焦面相机，逻辑像素尺寸为6.2mm x 6.2mm。在这里，我们描述了该项目的当前状态，预期的性能，其可能的演变方面的SST微型阵列。这个CTA-SST的前身由几个SST组成，并与CTA国际合作伙伴合作开发，不仅可以仔细研究应科院采用的技术解决方案，还可以解决几个详细讨论的科学测试案例。
Background analysis and status of the ANAIS dark matter project
ANAIS（Annual modulation with NaI Scintillators）是一个项目，目的是在Canfranc地下实验室（LSC）的新设施中建立一个大规模的NaI（Tl）实验，以便使用相同的目标和技术探索DAMA/LIBRA年度调制的积极结果。由Alpha Spectra提供的两个12.5 kg NaI（Tl）晶体在ANAIS-25装置中的LSC处采集数据。ANAIS-25原型的背景模型与实验结果的比较。钍-232和铀-238链的ANAIS晶体放射性纯度目标已经实现，但Pb-210污染的平衡被确定，其来源已被研究。用这些原型获得的高光收集效率允许预期1 keVee量级的能量阈值。2015年3月收到了性能得到改进的新探测器，并显示了非常初步的结果。
The Cosmic-Ray Extremely Distributed Observatory (CREDO) is a project dedicated to global studies of extremely extended cosmic-ray phenomena, the cosmic-ray ensembles (CRE), beyond the capabilities of existing detectors and observatories. Up to date cosmic-ray research has been focused on detecting single air showers, while the search for ensembles of cosmic-rays, which may spread over a significant fraction of the Earth, is a scientific terra incognita. The key idea of CREDO is to combine existing cosmic-ray detectors (large professional arrays, educational instruments, individual detectors, …
Status of the COSmological Microwave Observations CALibrator
Institut d’Astrophysique Spatiale, CNRS-Université Paris-Saclay（空间天体物理研究所）；Institut de Recherche en Astrophysique et Planétologie, CNRS-INSU（天文与行星学研究所在）；Institut de Radio-Astronomie Millimétrique（毫米波射电天文学研究所）；Department of Physics, University of Milano-Bicocca（米兰比可卡大学物理系）；Laboratoire de Physique de l’École normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris Cité（巴黎高等师范学院物理实验室）；Laboratoire de Physique Subatomique et de Cosmologie, CNRS（亚原子物理学与宇宙学实验室）；INAF - Osservatorio di astrofisica e scienza dello spazio Bologna（意大利国家天体物理研究所博洛尼亚天文与空间科学观测站）；Institut d’Electronique et des Technologies du numérique（电子与数字技术研究所）；Centre spatial universitaire de Grenoble, Université Grenoble Alpes（格勒诺布尔大学航天中心）；University（大学）
The LCO Outbursting Objects Key (LOOK) Project uses the telescopes of the Las Cumbres Observatory (LCO) Network to: (1) to systematically monitor a sample of Dynamically New Comets over the whole sky, and (2) use alerts from existing sky surveys to rapidly respond to and characterize detected outburst activity in all small bodies. The data gathered on outbursts helps to characterize each outburst's evolution with time, assess the frequency and magnitude distribution of outbursts in general, and contributes to the understanding of outburst processes and volatile distribution in the Solar System…
We report the current status of the 1.85-m mm-submm telescope installed at the Nobeyama Radio Observatory (altitude 1400 m) and the future plan. The scientific goal is to reveal the physical/chemical properties of molecular clouds in the Galaxy by obtaining large-scale distributions of molecular gas with an angular resolution of several arcminutes. A semi-automatic observation system created mainly in Python on Linux-PCs enables effective operations. A large-scale CO $J=$2--1 survey of the molecular clouds (e.g., Orion-A/B, Cygnus-X/OB7, Taurus-California-Perseus complex, and Galactic Plane), …
Status and future development of the COSMOCal Project for absolute CMB polarization calibration
Université Grenoble Alpes, CNRS, LPSC Grenoble（格勒诺布尔阿尔卑斯大学）；International School for Advanced Studies (SISSA)（高等高级研究学院）；INFN Sezione di Trieste（的里雅斯特INFN分部）；Institut de Recherche en Astrophysique et Planétologie（天体物理学和行星学研究所）；Institut de Radio-Astronomie Millimétrique（毫米波射电天文学研究所）；Department of Physics, University of Milano-Bicocca（米兰比可卡大学物理系）；Laboratoire de Physique de l’Ecole normale supérieure（巴黎高等师范学院物理实验室）；INAF - Osservatorio di astrofisica e scienza dello spazio Bologna（博洛尼亚天文物理与空间科学观测站）；Univ. Grenoble Alpes, CNRS, IPAG（格勒诺布尔阿尔卑斯大学）；Institut d’Electronique et des Technologies du numérique（电子与数字技术研究所）；Laboratoire de Physique des 2 infinis Irène Joliot-Curie（伊雷娜·约里奥-居里双无穷物理实验室）；Institut d’Astrophysique Spatiale（天体物理学研究所）；Centre Spatial Universitaire de Grenoble（格勒诺布尔大学航天中心）；Dipartimento di Fisica, Università di Roma “Tor Vergata”（罗马“托尔维加塔”大学物理系）；INAF - Osservatorio Astronomico di Cagliari（卡利亚里天文观测站）；Sapienza Università di Roma（罗马智慧大学）；Department of Physics, Boston University（波士顿大学物理系）；LERMA, Observatoire di Paris-PSL（巴黎天文台）
