Perspectives of ion beam polishing of mandrels for x-ray replication optics

Mauro Ghigo; Oberto Citterio; Paolo Conconi; Ralf Loi; Francesco Mazzoleni

doi:10.1117/12.212628

20 June 1995 Perspectives of ion beam polishing of mandrels for x-ray replication optics

Mauro Ghigo, Oberto Citterio, Paolo Conconi, Ralf Loi, Francesco Mazzoleni

Proceedings Volume 2515, X-Ray and Extreme Ultraviolet Optics; (1995) https://doi.org/10.1117/12.212628
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

The optical system requirements for high throughput, high resolution, x-ray telescopes for future space missions that foresee the use of a manufacturing process by replica method, demand a tight control of the shape of the mandrels used for the production of the shells. Since the number of mandrels to be manufactured for a project is generally high, it's also important that the technology adopted for the shape control be cost-effective. With the proposed approach, the aluminum-kanigen mandrels are diamond turned and superpolished to the required microroughness. The final figuring is then obtained with the ion-beam polishing technology that allows the fine tuning of the mandrel shape preserving its microroughness. This method has significant advantages over other conventional figuring processes since no physical load is applied to the mandrel and the material removal function generated from the ion source is stable and repeatable, allowing a deterministic final figuring in one or few passes. A computer simulation of the ion-beam polishing of a mandrel has been executed. An evaluation of the effect of the size of the material removal function used, the final surface error, and the working time required have been obtained.

Citation Download Citation

Mauro Ghigo, Oberto Citterio, Paolo Conconi, Ralf Loi, and Francesco Mazzoleni "Perspectives of ion beam polishing of mandrels for x-ray replication optics", Proc. SPIE 2515, X-Ray and Extreme Ultraviolet Optics, (20 June 1995); https://doi.org/10.1117/12.212628

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