<title>Normal Incidence Multilayer Mirrors For Extreme Ultraviolet Astronomy</title>

AbstractORFEUS (Orbiting and Retrievable Far and Extreme Ultraviolet Spectrometer) is a 1 m normal incidence telescope for spectroscopic investigations of cosmic sources in the far and extreme ultraviolet spectral range. The instrument will be integrated into the freeflyer platform ASTRO-SPAS. ORFEUS-SPAS is scheduled with STS ENDEAVOUR in September 1992. We describe the telescope with its two spectrometers and their capabilities i.e. spectral range, resolution and overall sensitivity. The main classes of objects to be observed with the instrument are discussed and two examples of simulated spectra for the white dwarf HZ43 and an O9-star in the LMC are shown.

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Molybdenum/beryllium multilayer mirrors for normal incidence in the extreme ultraviolet

Applied Optics ◽

10.1364/ao.34.003727 ◽

1995 ◽

Vol 34 (19) ◽

pp. 3727 ◽

Cited By ~ 55

Author(s):

K. M. Skulina ◽

C. S. Alford ◽

R. M. Bionta ◽

D. M. Makowiecki ◽

E. M. Gullikson ◽

...

Keyword(s):

Extreme Ultraviolet ◽

Normal Incidence ◽

Multilayer Mirrors

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Normal incidence spectrophotometer with high-density transmission grating technology and high-efficiency silicon photodiodes for absolute solar extreme-ultraviolet irradiance measuremen

Optical Engineering ◽

10.1117/12.149195 ◽

1993 ◽

Vol 32 (12) ◽

pp. 3121 ◽

Cited By ~ 17

Author(s):

Howard S. Ogawa

Keyword(s):

High Efficiency ◽

Extreme Ultraviolet ◽

Normal Incidence ◽

High Density ◽

Transmission Grating ◽

Ultraviolet Irradiance ◽

Solar Extreme Ultraviolet Irradiance

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On the Ability of an Extreme-Ultraviolet Multilayer Normal-Incidence Telescope to Provide Temperature Information for Solar Plasmas

The Astrophysical Journal ◽

10.1086/311835 ◽

1999 ◽

Vol 511 (1) ◽

pp. L61-L64 ◽

Cited By ~ 18

Author(s):

U. Feldman ◽

J. M. Laming ◽

G. A. Doschek ◽

H. P. Warren ◽

L. Golub

Keyword(s):

Extreme Ultraviolet ◽

Normal Incidence ◽

Solar Plasmas

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Normal-Incidence Multilayer Mirrors for the 120–450 Å Wavelength Region

Journal of X-Ray Science and Technology ◽

10.3233/xst-1990-2401 ◽

1990 ◽

Vol 2 (4) ◽

pp. 241-248

Author(s):

S. V. Gaponov ◽

S. A. Gusev ◽

V. V. Dubrov ◽

A. I. Kuzmichev ◽

B. M. Luskin ◽

...

Keyword(s):

Wavelength Region ◽

Normal Incidence ◽

Multilayer Mirrors

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Beryllium-Based Multilayer Mirrors for the Soft X-Ray and Extreme Ultraviolet Wavelength Ranges

Journal of Surface Investigation X-ray Synchrotron and Neutron Techniques ◽

10.1134/s1027451020020160 ◽

2020 ◽

Vol 14 (1) ◽

pp. 124-134 ◽

Cited By ~ 2

Author(s):

Yu. A. Vainer ◽

S. A. Garakhin ◽

S. Yu. Zuev ◽

A. N. Nechay ◽

R. S. Pleshkov ◽

...

Keyword(s):

Extreme Ultraviolet ◽

Multilayer Mirrors ◽

X Ray ◽

Ultraviolet Wavelength

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Experiment to Determine the Temperature Structure in the Solar Chromosphere and Corona

International Astronomical Union Colloquium ◽

10.1017/s0252921100089879 ◽

1972 ◽

Vol 14 ◽

pp. 668-669

Author(s):

C. R. Negus

Keyword(s):

Transition Region ◽

Extreme Ultraviolet ◽

Normal Incidence ◽

Research Unit ◽

Emission Lines ◽

Solar Chromosphere ◽

Temperature Structure ◽

Ultraviolet Emission ◽

Ionization Temperature ◽

Intensity Ratios

An experiment is in course of preparation at the Astrophysics Research Unit at Culham for flight on a Sun-pointing rocket. It is designed to determine the ionization temperature and electron density as a function of height in the temperature range of about 8 × 104 K to 3 × 106 K by measuring limb to disk intensity ratios of extreme ultraviolet emission lines in the 170 to 850 Å region. The work is an extension of current experiments in which normal-incidence spectrographs are used to determine the structure lower in the chromosphere-corona transition region.

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