Spectro-imaging of the extreme-UV solar corona

Silvano Fineschi; J. Dan Moses; Roger J. Thomas

doi:10.1117/12.617659

27 September 2005 Spectro-imaging of the extreme-UV solar corona

Silvano Fineschi, J. Dan Moses, Roger J. Thomas

Proceedings Volume 5901, Solar Physics and Space Weather Instrumentation; 590114 (2005) https://doi.org/10.1117/12.617659
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

This paper describes an instrument concept for imaging spectroscopy of ultraviolet (UV) line emission from the solar corona, in the (30-120) nm wavelength range. The optical design for this Ultraviolet Spectro-Coronagraph (UVSC) instrument concept is an externally occulted, off-axis Gregorian telescope where the secondary mirror is a Toroidal Varied Line-Space (TVLS) grating. A field stop with multiple slits is at the prime focus of the telescope's mirror. This multi-slit field stop is the entrance aperture for the spectrograph. The slits select a number of strips in the field-of-view (FOV) with enough separation to minimize the spectral overlap of the UV lines dispersed by the TVLS grating. The complete two-dimensional imaging of the FOV is obtained by interpolating the slit images along the spectral dispersion direction. This paper discusses the use of an UVSC instrument on HERSCHEL, a NASA sounding-rocket payload. HERSCHEL includes the Sounding-rocket CORonal Experiment (SCORE) that currently comprises a UV Coronagraphic Imager (UVCI) for narrow-band (i.e., λ/Δλ≈10) imaging of the HeII, 30.38 nm, line. Adding a spectroscopic capability (i.e., λ/Δλ ≈ 0.3-1 × 10⁴) to the UVCI would enhance the HERSCHEL's science. This paper presents the ray-tracing results of the expected spectral and spatial performances of a UVSC/SCORE optimised for the HeII, 30.38 nm, line.

Citation Download Citation

Silvano Fineschi, J. Dan Moses, and Roger J. Thomas "Spectro-imaging of the extreme-UV solar corona", Proc. SPIE 5901, Solar Physics and Space Weather Instrumentation, 590114 (27 September 2005); https://doi.org/10.1117/12.617659

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available