The Focusing Optics X-ray Solar Imager (FOXSI) sounding rocket experiment demonstrates the technique of focusing hard X-ray (HXR) optics for the study of fundamental questions about the high-energy Sun. Solar HXRs provide one of the most direct diagnostics of accelerated electrons and the impulsive heating of the solar corona. Previous solar missions have been limited in sensitivity and dynamic range by the use of indirect imaging, but technological advances now make direct focusing accessible in the HXR regime, and the FOXSI rocket experiment optimizes HXR focusing telescopes for the unique scientific requirements of the Sun. FOXSI has completed three successful flights between 2012 and 2018. This paper gives a brief overview of the experiment, focusing on the third flight of the instrument on 2018 Sept. 7. We present the telescope upgrades highlighting our work to understand and reduce the effects of singly reflected X-rays and show early science results obtained during FOXSI's third flight.
|Original language||English (US)|
|Title of host publication||UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI|
|Editors||Oswald H. Siegmund|
|State||Published - 2019|
|Event||UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI 2019 - San Diego, United States|
Duration: Aug 11 2019 → Aug 13 2019
|Name||Proceedings of SPIE - The International Society for Optical Engineering|
|Conference||UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI 2019|
|Period||8/11/19 → 8/13/19|
Bibliographical noteFunding Information:
This work was supported by JSPS KAKENHI Grant Numbers JP17H04832, JP16H02170, JP16H03966, JP24244021, JP20244017, and World Premier International Research Center Initiative (WPI), MEXT, Japan.
This work was supported by NASA Headquarters under the NASA Earth and Space Science Fellowship Program Grant 80NSSC17K0430.
The FOXSI-3 sounding rocket is funded by NASA LCAS grant NNX16AL60G. We acknowledge the NSF for its support of space physics at UMN via a faculty development grant AGS-1429512. The FOXSI team is grateful to the NSROC teams at WSMR and Wallops for the excellent operation of their systems. Furthermore, the authors would like to acknowledge the contributions of each member of the FOXSI experiment team to the project, particularly our team members at ISAS and Kavli IPMU for the provision of Si and CdTe detectors and at MSFC for the fabrication of the focusing optics.
This work was supported by JSPS KAKENHI Grant JP16H02170, JP15H03647, JP21540251.
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- The Sun
- X-ray focusing optics
- sounding rocket