High-Energy Solar Spectroscopic Imager (HESSI) Small Explorer mission for the next (2000) solar maximum
High-Energy Solar Spectroscopic Imager (HESSI) Small Explorer mission for the next (2000) solar maximum
复制标题
高能太阳光谱成像仪 (HESSI) 小型探索者任务，探索下一个（2000 年）太阳极大值
DOI：
10.1117/12.330245
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
F. Snow
中科院分区：
文献类型：
--
作者：
R. Lin;G. Hurford;N. Madden;B. Dennis;C. Crannell;G. Holman;R. Ramaty;T. V. von Rosenvinge;A. Zehnder;H. F. van Beek;P. Bornmann;R. Canfield;A. Emslie;H. Hudson;A. Benz;JOHN C. Brown;S. Enome;T. Kosugi;N. Vilmer;David M. Smith;J. McTiernan;I. Hawkins;S. Slassi;A. Csillaghy;G. Fisher;C. Johns–Krull;R. Schwartz;L. Orwig;D. Zarro;E. Schmahl;M. Aschwanden;P. Harvey;D. Curtis;D. Pankow;David C. Clark;R. Boyle;R. Henneck;Akilo Michedlishvili;K. Thomsen;J. Preble;F. Snow
美国宇航局选择的高能太阳光谱成像仪（HESSI）小型探测器任务的主要科学目标是研究太阳耀斑中粒子加速和能量释放的物理现象。观测将对大约3千电子伏特到大约20兆电子伏特的x射线和（伽马）射线进行观测，并结合前所未有的高分辨率成像和光谱。HESSI仪器采用傅里叶变换成像，配有9个双栅格旋转调制准直器和冷却锗探测器。该仪器安装在指向太阳的自旋稳定航天器上，放置在600公里高度、38度倾角的轨道上。它将提供硬x射线的第一个成像光谱，其角分辨率约为2角秒，时间分辨率低至数十毫秒，能量分辨率约为1千伏；第一太阳（伽马）射线谱，能量分辨率约为1-5 keV；第一个太阳（伽马）射线线和连续成像，具有大约36弧秒的角分辨率。HESSI计划于2000年7月发射，以便及时探测到下一个太阳活动极大期预计会出现的数千个耀斑。
The primary scientific objective of the High Energy Solar Spectroscopic Imager (HESSI) Small Explorer mission selected by NASA is to investigate the physics of particle acceleration and energy release in solar flares. Observations will be made of x-rays and (gamma) rays from approximately 3 keV to approximately 20 MeV with an unprecedented combination of high resolution imaging and spectroscopy. The HESSI instrument utilizes Fourier- transform imaging with 9 bi-grid rotating modulation collimators and cooled germanium detectors. The instrument is mounted on a Sun-pointed spin-stabilized spacecraft and placed into a 600 km-altitude, 38 degrees inclination orbit.It will provide the first imaging spectroscopy in hard x-rays, with approximately 2 arcsecond angular resolution, time resolution down to tens of ms, and approximately 1 keV energy resolution; the first solar (gamma) ray line spectroscopy with approximately 1-5 keV energy resolution; and the first solar (gamma) -ray line and continuum imaging,with approximately 36-arcsecond angular resolution. HESSI is planned for launch in July 2000, in time to detect the thousands of flares expected during the next solar maximum.