Hard X-ray observation of solar flares with balloon-borne CdTe spectrometer

用气球载 CdTe 光谱仪对太阳耀斑进行硬 X 射线观测

• 批准号: 11304012
• 负责人: TSUNETA Saku
• 金额: $ 20.04万
• 依托单位: National Astronomical Observatory of Japan
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11304012/
• 关键词: Balloon experiment; Cadmium telluride detector; Semiconductor detector; Solar flare; Hard X-rays; X-ray spectra; Space experiment; RHESSI satellite; カドミウムテルライド; 太陽物理学; カドミテルル検出器; X線検出器; 宇宙物理実験

The purpose of the research is to develop the balloon-borne Cadmium telluride detector spectrometer, and to observe solar flare hard X-rays during the current solar maximum. The development of the spectrometer with 16 detections was completed in the summer of 2001, and the ISAS balloon B80-6 was launched in 2001 October 29 from the Sanriku Balloon Center of ISAS, and the observation at 42 km altitude was successfully carried out. Though solar flares were unfortunately not detected, the instrument worked fine, and high-quality background data was taken. The detector was cooled down to -10 degree C, and the spectral resolution was 2,503 KeV, which was quite good as compared with conventional detectors. The instrument was recovered in the Japan sea. Following the successful demonstration of the instrument performance, the second flight experiment was done in 2002 May 24. An M1.2 flare was detected at 15:30 JST. We believe that this is the first detection of hard X-rays from celestial sources with the CdTe detectors. 16 detectors worked fine throughout the observation, and the emission lines from the shield lead allow us to confirm that there was no degradation in energy gain and resolution. The initial portion of the flare was also observbed with NASA RHESS satellite,which carried germanium detector and modulation collimator, and both results coincided very well. An initial analysis showed that the observed spectra were well fitted by 50 MK thermal spectra, and detailed study is going on with radio data taken with the Nobeyama radio heliograph.

研究的目的是研制气球载碲化镉探测器光谱仪，并在当前太阳极大期观测太阳耀斑硬x射线。2001年夏季完成了16次探测的光谱仪研制，2001年10月29日在ISAS三陆气球中心发射了ISAS气球B80-6，成功进行了42公里高度的观测。虽然不幸的是没有探测到太阳耀斑，但仪器工作良好，并获得了高质量的背景数据。将探测器冷却至-10℃，光谱分辨率为2503 KeV，与传统探测器相比具有相当好的性能。这台仪器是在日本海找到的。继仪器性能的成功演示之后，在2002年5月24日进行了第二次飞行实验。在JST 15:30检测到M1.2耀斑。我们相信这是第一次用CdTe探测器探测到来自天体的硬x射线。16个探测器在整个观测过程中工作良好，屏蔽引线的发射线使我们能够确认能量增益和分辨率没有下降。美国宇航局的RHESS卫星携带锗探测器和调制准直器对耀斑的初始部分进行了观测，结果吻合良好。初步分析表明，观测光谱与50 MK热谱拟合良好，并对野山射电日像仪采集的射电数据进行了详细的研究。

项目成果

Kobayashi, Ken, Tsuneta, S., Tamura, T., Kumagai, K., Katsukawa, Y., Kubo, S., Yamagami, T.: "Balloon-borne hard X-ray spectrometer for flare observation"Multi-Wavelength Observations of Cornal Structure and Dynamics - Yohkoh 10th Anniversary Meeting. 429

Kobayashi, Ken, Tsuneta, S., Tamura, T., Kumagai, K., Katsukawa, Y., Kubo, S., Yamagami, T.：“用于耀斑观测的球载硬X射线光谱仪”多波长

Kobayashi, K., Tsuneta, S., Tamura, T., Kumagai, K., Katsukawa, Y., Kubo, M., Sakamoto, Y., Yamagami, T., Saito, Y., Mori, K.: "Observation of solar flare hard x-ray spectra using CdTe detectors"34th COSPAR Scientific Assembly. (in press). (2002)

小林 K.、常田 S.、田村 T.、熊谷 K.、胜川 Y.、久保 M.、坂本 Y.、山上 T.、斋藤 Y.、森 K.：

Kobayashi, K., Tsuneta, S., Tamura, T., Kujmagai, K., Katsukawa, Y., Kubo, S., Yamagami, T., Saitoh, Y.: "Balloon-borne Hard X-ray Spectrometer for Flare Observations"SPIE Conference on Astronomical Telescopes and Instrumentation. (in press). (2002)

Kobayashi, K.、Tsuneta, S.、Tamura, T.、Kujmagai, K.、Katsukawa, Y.、Kubo, S.、Yamagami, T.、Saitoh, Y.：“球载硬 X 射线光谱仪

K.Kobayashi et al.: "Observation of solar flare hard x-ray spectra using CdTe detectors"Advances in Space Research. (印刷中).

K. Kobayashi 等人：“使用 CdTe 探测器观测太阳耀斑硬 X 射线光谱”空间研究进展（正在出版）。

K.Kobayashi et al.: "Balloon-borne Hard X-ray Spectrometer for Flare Observations"SPIE. (印刷中).

K. Kobayashi 等人：“用于耀斑观测的球载硬 X 射线光谱仪”SPIE（正在出版）。