Slumping monitoring of glass and silicone foils for x-ray space telescopes

M. Mika; L. Pina; M. Landova; L. Sveda; R. Havlikova; V. Semencova; R. Hudec; A. Inneman

doi:10.1117/12.903692

28 September 2011 Slumping monitoring of glass and silicone foils for x-ray space telescopes

M. Mika, L. Pina, M. Landova, L. Sveda, R. Havlikova, V. Semencova, R. Hudec, A. Inneman

Proceedings Volume 8139, Advances in X-Ray/EUV Optics and Components VI; 813915 (2011) https://doi.org/10.1117/12.903692
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

We developed a non-contact method for in-situ monitoring of the thermal slumping of glass and silicone foils to optimize this technology for the production of high quality mirrors for large aperture x-ray space telescopes. The telescope's crucial part is a high throughput, heavily nested mirror array with the angular resolution better than 5 arcsec. Its construction requires precise and light-weight segmented optics with surface micro-roughness on the order of 0.1 nm. Promising materials are glass or silicon foils shaped by thermal forming. The desired parameters can be achieved only through optimizing the slumping process. We monitored the slumping by taking the snapshots of the shapes every five minutes at constant temperature and the final shapes we measured with the Taylor Hobson profilometer. The shapes were parabolic and the deviations from a circle had the peak-to-valley values of 20-30 μm. The observed hot plastic deformation of the foils was controlled by viscous flow. We calculated and plotted the relations between the middle part deflection, viscosity, and heat-treatment time. These relations have been utilized for the development of a numerical model enabling computer simulation. By the simulation, we verify the material's properties and generate new data for the thorough optimization of the slumping process.

Citation Download Citation

M. Mika, L. Pina, M. Landova, L. Sveda, R. Havlikova, V. Semencova, R. Hudec, and A. Inneman "Slumping monitoring of glass and silicone foils for x-ray space telescopes", Proc. SPIE 8139, Advances in X-Ray/EUV Optics and Components VI, 813915 (28 September 2011); https://doi.org/10.1117/12.903692

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