Large-area thin aluminum filter design, handling, and testing

Peter Cheimets; Jay A. Bookbinder; Edward E. DeLuca; David Caldwell; William R. Davis Jr.; Leon Golub

doi:10.1117/12.330267

10 November 1998 Large-area thin aluminum filter design, handling, and testing

Peter Cheimets, Jay A. Bookbinder, Edward E. DeLuca, David Caldwell, William R. Davis Jr., Leon Golub

Proceedings Volume 3445, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX; (1998) https://doi.org/10.1117/12.330267
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

The process of observing the Sun in the x-ray and extreme UV (XUV), as we are now doing with the TRACE telescope, requires blocking the tremendous amount of visible and RI light that dominates the flux from the sun. If it is not blocked, the energy will swamp the desired spectrum and cause thermal problems inside the telescope. The most effective approach removing the energy is by filtering the incoming light. One of the best materials for eliminating the undesirable wavelengths is aluminum, which is semi- transparent to x-ray and XUV, but blocks most light with wavelength redward of 850 angstrom. Unfortunately the aluminum must be extremely must be extremely thin, < 1600 angstrom thick, to provide the necessary XUV transparency. To overcome the structural problem of supporting large areas of extremely thin aluminum, the aluminum film is bonded on a nickel mesh.

Citation Download Citation

Peter Cheimets, Jay A. Bookbinder, Edward E. DeLuca, David Caldwell, William R. Davis Jr., and Leon Golub "Large-area thin aluminum filter design, handling, and testing", Proc. SPIE 3445, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX, (10 November 1998); https://doi.org/10.1117/12.330267

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KEYWORDS

Aluminum

Optical filters

Sun

Image filtering

Extreme ultraviolet

Telescopes

Visible radiation

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