Computer Science – Sound
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh44b1738m&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SH44B-1738
Computer Science
Sound
7507 Chromosphere, 7509 Corona, 7546 Transition Region, 7549 Ultraviolet Emissions, 7594 Instruments And Techniques
Scientific paper
The highly-structured and extremely dynamic interface between the photosphere and the corona is of crucial importance in understanding solar activity and space weather. Recent high-resolution observations with Hinode have shown that understanding this interface requires the ability to study the transition region by imaging plasma around 500,000 K on spatial scales of ~0.2 arc seconds, at cadences of ~5 seconds or less. We have completed a preliminary design of a telescope capable of meeting all three of these requirements - thermal, spatial, and temporal, called the High-resolution Lightweight Telescope for the EUV (HiLiTE). HiLiTE is a Cassegrain telescope with an aperture of 30 cm, angular resolution of ~0.2 arc seconds, and a mass that is about 1/4 that of one of the 20 cm aperture telescopes on SDO/AIA. The instrument bandpass will be tuned to the 46.5 nm Ne VII emission line formed in plasma at ~500,000 K. HiLiTE, including both mirrors and the metering structure, will be constructed entirely from lightweight, thermally stable, high-stiffness advanced Silicon Carbide (SiC) material. While SiC is an extremely promising material for space telescopes, SiC optics with the figure and surface finish required for normal-incidence multilayers have not yet been demonstrated. Upon integrating this instrument with an Advanced CMOS detector (in parallel development at Lockheed Martin via another internally funded program) and on board electronics, HiLiTE can easily be retrofitted to fly on board a sounding rocket, acting as a path finder to a post-AIA, Explorer-class mission. Herein, we give an update of the HiLiTE instrument development program, discussing expected instrument performance as well as the advantages of using SiC for EUV/Soft X-ray imaging in solar physics.
Boerner Paul
de Pontieu Bart
Gullikson Eric
Katz Nets
Martinez-Galarce Dennis
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