Gadolinium EUV Multilayers for Solar Imaging Near 60 nm

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNM07AA41C
Agency Tracking Number: 066398
Amount: $100,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2007
Solicitation Year: 2006
Solicitation Topic Code: S3.04
Solicitation Number: N/A
Small Business Information
Reflective X-ray Optics LLC
1361 Amsterdam Ave, Suite 3B, New York, NY, 10027-2589
DUNS: 169939092
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David Windt
 Principal Investigator
 (212) 678-4932
 windt@rxollc.com
Business Contact
 David Windt
Title: Business Official
Phone: (212) 678-4932
Email: windt@rxollc.com
Research Institution
N/A
Abstract
We propose to develop and commercialize a new class of extreme ultraviolet (EUV) multilayer coatings containing the rare-earth element gadolinium (Gd), designed as efficient narrow-band reflective mirror coatings operating near normal incidence in the 60-65 nm wavelength range. This long-wavelength region of the EUV includes the important solar emission lines O V near l=63.0 nm and Mg X near l=61.0 nm, formed at intermediate temperatures in the solar atmosphere. While narrow-band EUV multilayer coatings are by now widely used in NASA missions for high-resolution solar imaging at wavelengths shorter than 35 nm, the observations made at those wavelengths probe coronal and transition region lines formed at either low (e.g., He II at l=30.4 nm) or high (e.g., numerous Fe lines) temperatures. In contrast, the 60–65 nm wavelength region provides a unique spectral window in which to observe intermediate-temperature solar emission lines. However, efficient multilayer coatings operating in this range have been unavailable until now. The successful development of efficient, stable Gd-based multilayers as we propose, based on preliminary experimental results, will therefore enable the construction of new high-resolution solar telescopes tuned to O V or Mg X that will complement existing multilayer telescopes tuned to shorter EUV wavelengths, thereby providing more complete temperature coverage, and leading to better understanding of the solar atmosphere, its variability, and its crucial role in driving space weather. EUV imaging instruments incorporating the multilayer technology we propose to develop may be included in future missions such as RAM, Solar Probe, and Solar Orbiter, as well as future GOES satellites and new Explorer-class missions. The proposed innovation thus directly supports NASA's SBIR "S3.04 Optical Devices for Starlight Detection and Wavefront Analysis" subtopic.

* information listed above is at the time of submission.

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