Development of Magnetic Calorimeter for the Search of Intergalactiv Medium by X-Ray Observation

X射线观测寻找间质介质磁量热仪的研制

• 批准号: 12440067
• 负责人: YAMASAKI Noriko
• 金额: $ 9.6万
• 依托单位: The Institute of Space and Astronautical Science (2002)Tokyo Metropolitan University (2000-2001)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12440067/
• 关键词: X-Ray Astronomy; Interstellar matter; Intergalactic Medium; micro-calorimeters; Observational Astrophysics; Clusters of Galaxies; 銀河間物; 科学衛星; X線天文; X線分光; 放射線検出器; 極低温; 常磁性体; 磁化率

(1)Measurement of the magnetic properties of 30% Er-doped YAG crustalWe measured the specific heat of 30% Er-doped YAG crustal and derived the magnetic entropy at 93mk〜8K under 8T.(2)Fabrication of the metallic magnetic calorimeter sensorsFabrication process of Er:Au metallic magnetic sensor utilizing IR heater in a vacuum chamber has been established. The concentration of Er were directly measured by RF-SQUID at 4.2K.(3)Setup of SQUID readout at low temperature stageDC-SQUID amplifier for the readout of magnetic calorimeters was introduced at 0.3K stage in a 3He cryostat. Magnetic shield for the SQUID was also set and the SQUID was successfully drived under the magnetic field.(4)Observational and theoretical. studies of the intergalactic medium. We obtained temperature and metal distribution in several cluster of galaxies using ASCA and Chandra observation. The emissivity of oxygen emission line, from warm-hot intergalactic medium were calculated based on the SPH simulation and the detectability by X-ray detectors with high energy resolving power were discussed.

（1）30%掺铒钇铝石榴石（YAG）晶体的磁性测量我们测量了30%掺铒钇铝石榴石（YAG）晶体在8 T、93 ℃、8 K下的比热，并计算了其磁熵。（2）金属磁量热传感器的制作建立了利用红外加热器在真空室中制作Er：Au金属磁传感器的工艺。在4.2K下，用RF-SQUID直接测量了Er的浓度。（3）超导量子干涉仪低温读出装置在~ 3 He低温恒温器上，介绍了用于磁量热计读出的0.3K级DC-SQUID放大器。还设置了SQUID的磁屏蔽，并在磁场下成功驱动了SQUID。（4）观察性和理论性。星系间介质的研究。我们利用ASCA和Chandra观测得到了几个星系团的温度和金属分布。基于SPH模拟计算了来自温热星系际介质的氧发射线的发射率，讨论了高能分辨X射线探测器的探测能力。

项目成果

H.Ezawa 他8名: "ASCA Observations of the Temperature Structure and Metal Distribution in the Perseus Cluster of Galaxies"Publ.Astron.Soc.Japan. 53-4. 595-604 (2001)

H.Ezawa 和其他 8 人：“ASCA 观测英仙座星系团中的温度结构和金属分布”Publ.Astron.Soc.Japan 53-4 (2001)。

T.Furusho 他8名: "ASCA Temperature Maps of Three Clusters of Galaxies : Abell 1060, AWM 7, and the Centaurus Cluster"Publ.Astron.Soc.Japan. 53-2. 421-432 (2001)

T.Furusho 和其他 8 人：“ASCA 三个星系团的温度图：Abell 1060、AWM 7 和半人马座星系团”Publ.Astron.Soc.Japan 53-2 (2001)。

A.Kushino, et al.: "Erbium-doped yttrium aluminum garnet as a magnetic refrigerant for low temperature X-ray detectors"Journal of Applied Physics. 90. 5812-5818 (2001)

A.Kushino 等人：“掺铒钇铝石榴石作为低温 X 射线探测器的磁性制冷剂”应用物理学杂志。

A.Kushino, et al.: "Study of the X-Ray Background Spectrum and its Large-Scale Fluctuation with ASCA"Publications Astronomical Society of Japan. 54. 327-352 (2002)

A.Kushino 等人：“利用 ASCA 研究 X 射线背景光谱及其大规模波动”，日本天文学会出版物。

Shin Sasaki, Noriko Y.Yamasaki: "Scaling Relation to Understand Non-Detection of Cold Gas at the Cluster Center"Publications Astronomical Society of Japan. 54. L1-L5 (2002)

Shin Sasaki、Noriko Y.Yamasaki：“通过标度关系来理解星团中心未检测到冷气体”日本天文学会出版物。