High-Energy Solar Spectroscopic Imager (HESSI) Small Explorer mission for the next (2000) solar maximum

Robert P. Lin; Gordon J. Hurford; Norman W. Madden; Brian R. Dennis; Carol Jo Crannell; Gordon D. Holman; Reuven Ramaty; Tycho T. von Rosenvinge; Alex Zehnder; H. Frank van Beek; Patricia L. Bornmann; Richard C. Canfield; A. Gordon Emslie; Hugh S. Hudson; Arnold Benz; John C. Brown; Shinzo Enome; Takeo Kosugi; Nicole Vilmer; David M. Smith; Jim McTiernan; Isabel Hawkins; Said A. Slassi-Sennou; Andre Csillaghy; George Fisher; Chris Johns-Krull; Richard Schwartz; Larry E. Orwig; Dominic Zarro; Ed Schmahl; Markus A. Aschwanden; Peter R. Harvey; David W. Curtis; David H. Pankow; David Clark; Robert F. Boyle; Reinhold Henneck; Akilo Michedlishvili; Knud Thomsen; Jeff Preble; Frank Snow

doi:10.1117/12.330245

2 November 1998 High-Energy Solar Spectroscopic Imager (HESSI) Small Explorer mission for the next (2000) solar maximum

Robert P. Lin, Gordon J. Hurford, Norman W. Madden, Brian R. Dennis, Carol Jo Crannell, Gordon D. Holman, Reuven Ramaty, Tycho T. von Rosenvinge, Alex Zehnder, H. Frank van Beek, Patricia L. Bornmann, Richard C. Canfield, A. Gordon Emslie, Hugh S. Hudson, Arnold Benz, John C. Brown, Shinzo Enome, Takeo Kosugi, Nicole Vilmer, David M. Smith, Jim McTiernan, Isabel Hawkins, Said A. Slassi-Sennou, Andre Csillaghy, George Fisher, Chris Johns-Krull, Richard Schwartz, Larry E. Orwig, Dominic Zarro, Ed Schmahl, Markus A. Aschwanden, Peter R. Harvey, David W. Curtis, David H. Pankow, David Clark, Robert F. Boyle, Reinhold Henneck, Akilo Michedlishvili, Knud Thomsen, Jeff Preble, Frank Snow

Author Affiliations +

Proceedings Volume 3442, Missions to the Sun II; (1998) https://doi.org/10.1117/12.330245
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

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.

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Robert P. Lin, Gordon J. Hurford, Norman W. Madden, Brian R. Dennis, Carol Jo Crannell, Gordon D. Holman, Reuven Ramaty, Tycho T. von Rosenvinge, Alex Zehnder, H. Frank van Beek, Patricia L. Bornmann, Richard C. Canfield, A. Gordon Emslie, Hugh S. Hudson, Arnold Benz, John C. Brown, Shinzo Enome, Takeo Kosugi, Nicole Vilmer, David M. Smith, Jim McTiernan, Isabel Hawkins, Said A. Slassi-Sennou, Andre Csillaghy, George Fisher, Chris Johns-Krull, Richard Schwartz, Larry E. Orwig, Dominic Zarro, Ed Schmahl, Markus A. Aschwanden, Peter R. Harvey, David W. Curtis, David H. Pankow, David Clark, Robert F. Boyle, Reinhold Henneck, Akilo Michedlishvili, Knud Thomsen, Jeff Preble, and Frank Snow "High-Energy Solar Spectroscopic Imager (HESSI) Small Explorer mission for the next (2000) solar maximum", Proc. SPIE 3442, Missions to the Sun II, (2 November 1998); https://doi.org/10.1117/12.330245

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