中国科学院机构知识库网格系统: 检索

Single line of sight frame camera based on the RadOptic effect of ultrafast semiconductor detector 期刊论文 OAI收割
Optics and Lasers in Engineering, 2024, 卷号: 175
作者: Liu, Yiheng; He, Kai; Yan, Xin; Gao, Guilong; Du, Wanyi

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收藏 | 浏览/下载：27/0 | 提交时间：2024/02/26

Ultrafast optics Framing camera Ultrafast semiconductor detector X-ray detection Spatial and temporal characteristics

Theoretical and experimental study on responsivity of ultra-fast X-ray semiconductor chip based on the rad-optic effect 期刊论文 OAI收割
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2023, 卷号: 1049
作者: Yan, Xin; Wang, Tao; Wang, Gang; Yao, Dong; Liu, Yiheng

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收藏 | 浏览/下载：41/0 | 提交时间：2023/02/28

X-ray detector Rad-optic effect Ultrafast response semiconductor material Responsivity Ultrafast measurements

面向脉冲星深空基准建立的X射线望远镜及发展设想 期刊论文 OAI收割
航空学报, 2023, 卷号: 44, 期号: 3
作者: 周庆勇; 魏子卿; 雷耀虎; 刘思伟; 郝小龙

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收藏 | 浏览/下载：20/0 | 提交时间：2023/06/27

deep space reference pulsar navigation X-ray telescope X-ray detector pulsar timing 深空基准脉冲星导航 X射线望远镜 X射线探测器脉冲星计时

Design and test results of scientific X-ray CMOS cameras 期刊论文 OAI收割
X-RAY, OPTICAL, AND INFRARED DETECTORS FOR ASTRONOMY X, 2022, 卷号: 12191, 页码: 121910L
作者: Wang, WX; Ling, ZX; Zhang, C; Wu, Q; Jia, ZQ

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收藏 | 浏览/下载：4/0 | 提交时间：2023/11/13

sCMOS camera X-ray detector back-side illuminated scientific CMOS sensor

A sealed X-ray microchannel plate imager with CsI photocathode to improve quantitative precision of framing camera 期刊论文 OAI收割
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2021, 卷号: 1005
作者: Yang, Yang; Zhu, Bingli; Gou, Yongsheng; Chen, Zhen; Bai, Xiaohong

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收藏 | 浏览/下载：48/0 | 提交时间：2021/05/26

Framing camera X-ray detector Ultra-fast diagnostics Fusion diagnosis Micro-channel plate (MCP) CsI photocathode

X-ray communication experiment using photocathode X-ray tube 会议论文 OAI收割
Kunming, China, 2020-11-05
作者: Liu, Yong-An; Xuan, Hao; Sheng, Li-Zhi; Qiang, Peng-Fei; Su, Tong

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收藏 | 浏览/下载：38/0 | 提交时间：2021/04/12

X-ray Communication X-ray tube photocathode detector

HEPS-BPIX2: The hybrid pixel detector upgrade for high energy photon source in China 期刊论文 OAI收割
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2020, 卷号: 958, 页码: 4
作者:

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收藏 | 浏览/下载：38/0 | 提交时间：2020/12/10

X-ray detectors Hybrid detectors Front-end electronics for detector readout

The High Energy X-ray telescope (HE) onboard the Insight-HXMT astronomy satellite 期刊论文 OAI收割
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY, 2020, 卷号: 63, 期号: 4, 页码: 249503
作者: Liu, CongZhan; Zhang, YiFei; Li, XuFang; Lu, XueFeng; Chang, Zhi

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收藏 | 浏览/下载：42/0 | 提交时间：2020/10/19

X-ray telescope HXMT calibration scintillation detector

Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文 OAI收割
The Astrophysical Journal, 2020, 卷号: 901, 页码: L7
作者: HXMT

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收藏 | 浏览/下载：23/0 | 提交时间：2022/02/08

Radio transient sources Magnetars Soft gamma-ray repeaters 2008 992 1471 Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Instrumentation and Methods for Astrophysics Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of A_J = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 10¹⁴ Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to R_NIR ? 0.025 (fluence index ?0.35).

Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT 期刊论文 OAI收割
Astrophysics and Space Science, 2020, 卷号: 365, 页码: 158
作者: HXMT

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收藏 | 浏览/下载：48/0 | 提交时间：2022/02/08

Insight-HXMT Geant4 simulation Background observation Astrophysics - Instrumentation and Methods for Astrophysics Abstract: Insight-HXMT, the first X-ray astronomical satellite in China, aims to reveal new sources in the Galaxy and to study fundamental physics of X-ray binaries from 1 to 250 keV. It has three collimated telescopes, the High Energy X-ray telescope (HE), the Medium Energy X-ray telescope (ME), and the Low Energy X-ray telescope (LE). Before the launch, in-orbit backgrounds of these three telescopes had been estimated through Geant4 simulation, in order to investigate the instrument performance and the achievement of scientific goals. In this work, these simulated backgrounds are compared with in-orbit observations. Good agreements are shown for all three telescopes. For HE, (1) the deviation of the simulated background rate after two years of operation in space is 5 % from the observation (2) the total background spectrum and the relative abundance of the 67 keV line show long-term increases both in simulations and observations. For ME, (1) the deviation of simulated background rate is within 15 % from the observation, and (2) there are no obvious long-term increase features in the background spectra of simulations and observations. For LE, the background level given by simulations is also consistent with observations. The consistencies of these comparisons validate that the Insight-HXMT mass model, i.e., space environment components and models adopted, physics processes selected, and detector constructions built, is reasonable. However, the line features at 7.5 and 8.0 keV, which are obvious in the observed spectra of LE, are not evident in simulations. This might result from uncertainties in the LE constructions.