Performance of the Multi-Spectral Solar Telescope Array V: temperature diagnostic response to the optically thin solar plasma

DeForest, C. E.; Kankelborg, C. C.; Allen, Maxwell J.; Paris, Elizabeth S.; Willis, T. D.; Lindblom, Joakim F.; O'Neal, Ray H.; Walker, Arthur B. C.; Barbee, Troy W.; Hoover, Richard B.; Gluskin, E.

doi:10.1117/12.23210

“…Design considerations and fabrication ofthe MSSTA instruments are discussed in previous publications by Walker et a!. 18 d Hoover et al 19• For a complete description and report of the calibration measurements, i.e., optical characteristics, response functions and efficiency performance for all telescopes' mirrors, filters and photographic films from both flights we refer the reader to earlier studies by: Hoover et al, 20 Barbee et a!., 21 Deforest et a!., 22 Allen et al, 23 The Ritchey-Chrdtien telescopes are the largest of the MSSTA payload. They are two-mirror telescopes with hyperboloid optical elements.…”

Section: Msstamentioning

confidence: 99%

High resolution imaging with multilayer telescopes: resolution performance of the MSSTA II telescopes

Martinez-Galarce

¹

,

Walker

²

,

Gore

³

et al. 2000

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The Multi-Spectral Solar Telescope Array (MSSTA) is a sounding rocket-borne observatory composed of a set of normalincidence multilayer-coated telescopes that obtained selected bandpass spectroheliograms (44A-1550A) of the Solar atmosphere. These spectroheliograms were recorded on specially fabricated XUV and FUV 70mm Kodak film. Rocket launches of this instrument payload took place in 1991 (MSSTA 1) and 1994 (MSSTA II) at the White Sands Missile Test Range in New Mexico, sponsored by the NASA sounding rocket experiment program. Immediately prior to the 1994 launch, visible light focusing tests of each telescope were performed in-situ using a 195 1 Standard Air Force High Resolution Testtarget, to measure optical resolution performance. We determined that the MSSTA II telescopes performed at diffractionlimited resolutions down to 0.70 arc-second at visible wavelengths. Based on these measurements, we calculated an upperbound to the focusing errors that incorporate the sum of all uncorrelated system resolution errors that affect resolution performance. Coupling these upper-bound estimates with the in-band diffraction limits, surface scattering errors and payload pointing jitter, we demonstrate that eleven of nineteen MSSTA II telescopeshaving negligible figures of focus errors in comparison to the corresponding visible diffraction limitsperformed at sub arc-second resolution at their operational FUV/EUV/XUV wavelengths during flight. We estimate the in-band performance down to 0.14 0.08 second of arc.

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“…Design considerations and fabrication ofthe MSSTA instruments are discussed in previous publications by Walker et a!. 18 d Hoover et al 19• For a complete description and report of the calibration measurements, i.e., optical characteristics, response functions and efficiency performance for all telescopes' mirrors, filters and photographic films from both flights we refer the reader to earlier studies by: Hoover et al, 20 Barbee et a!., 21 Deforest et a!., 22 Allen et al, 23 The Ritchey-Chrdtien telescopes are the largest of the MSSTA payload. They are two-mirror telescopes with hyperboloid optical elements.…”

Section: Introductionmentioning

confidence: 99%

<title>High-resolution imaging with multilayer telescopes: resolution performance of the MSSTA II telescopes</title>

Martinez-Galarce

¹

,

Walker

²

,

Gore

³

et al. 1999

Self Cite

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The Multi-Spectral Solar Telescope Array (MSSTA) is a sounding rocket-borne observatory composed of a set of normalincidence multilayer-coated telescopes that obtained selected bandpass spectroheliograms (44A -1550A) of the Solar atmosphere. These spectroheliograms were recorded on specially fabricated XUV and FUV 70mm Kodak film. Rocket launches of this instrument payload took place in 1991 (MSSTA 1) and 1994 (MSSTA II) at the White Sands Missile Test Range in New Mexico, sponsored by the NASA sounding rocket experiment program. Immediately prior to the 1994 launch, visible light focusing tests of each telescope were performed in-situ using a 195 1 Standard Air Force High Resolution Testtarget, to measure optical resolution performance. We determined that the MSSTA II telescopes performed at diffractionlimited resolutions down to 0.70 arc-second at visible wavelengths. Based on these measurements, we calculated an upperbound to the focusing errors that incorporate the sum of all uncorrelated system resolution errors that affect resolution performance. Coupling these upper-bound estimates with the in-band diffraction limits, surface scattering errors and payload pointing jitter, we demonstrate that eleven of nineteen MSSTA II telescopeshaving negligible figures of focus errors in comparison to the corresponding visible diffraction limitsperformed at sub arc-second resolution at their operational FUV/EUV/XUV wavelengths during flight. We estimate the in-band performance down to 0.14 0.08 second of arc. Downloaded From: http://proceedings.spiedigitallibrary.org/ on 03/03/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx measurement of the in-band point spread function was not performed as it is a difficult and expensive measurement to conduct properly.Prior to the initial flight of multilayer telescopes in wavelength bands centered at I 73A and 256A, the Stanford-MSFC-LLNL consortium carried out a resolution test on a specially prepared Cassegrain telescope at 44.3A (identical to the 173A Cassegrain) using multilayer mirrors designed to reflect the C Ka line. These tests were carried out in the MSFC Xray Calibration Facility (XRCF) by Lindblom et al., 10, 11 who showed that the resolution of the multilayer mirrors was limited by the aberrations of the mirror substrates and also because of a mechanical deformation of the primary mirror introduced by its holding mechanism. Although efficiency tests have been carried out on all multilayer optical systems subsequently flown, the difficulty and expense of fabricating optical testing systems that can image the characteristic soft xray and EUV wavelengths that can be generated with laboratory sources, has precluded in-band resolution testing. Instead, we have carried out resolution tests at optical wavelengths using laser interferometric techniques to verify the optical figure, alignment and spatial frequency response of our flight telescopes. Coupled with these interferometric tests, visible light imaging measurements using a calibrated, standard high r...

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Multi-Spectral Solar Telescope Array IV: the soft x-ray and extreme ultraviolet filters

Lindblom

¹

,

O'Neal

²

,

Walker

³

et al. 1991

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Performance of the Multi-Spectral Solar Telescope Array V: temperature diagnostic response to the optically thin solar plasma

Cited by 3 publications

References 2 publications

High resolution imaging with multilayer telescopes: resolution performance of the MSSTA II telescopes

High resolution imaging with multilayer telescopes: resolution performance of the MSSTA II telescopes

<title>High-resolution imaging with multilayer telescopes: resolution performance of the MSSTA II telescopes</title>

Multi-Spectral Solar Telescope Array IV: the soft x-ray and extreme ultraviolet filters

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