Prototyping iridium coated mirrors for x-ray astronomy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F17%3A00312874" target="_blank" >RIV/68407700:21230/17:00312874 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1117/12.2265931" target="_blank" >http://dx.doi.org/10.1117/12.2265931</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2265931" target="_blank" >10.1117/12.2265931</a>

Result language

angličtina

Original language name

Prototyping iridium coated mirrors for x-ray astronomy

Original language description

X-ray astronomy uses space-based telescopes to overcome the disturbing absorption of the Earth´s atmosphere. The telescope mirrors are operating at grazing incidence angles and are coated with thin metal films of high-Z materials to get sufficient reflectivity for the high-energy radiation to be observed. In addition the optical payload needs to be light-weighted for launcher mass constrains. Within the project JEUMICO, an acronym for “Joint European Mirror Competence”, the Aschaffenburg University of Applied Sciences and the Czech Technical University in Prague started a collaboration to develop mirrors for X-ray telescopes. The X-ray telescopes currently developed within this Bavarian- Czech project are of Lobster eye type optical design. Corresponding mirror segments use substrates of flat silicon wafers which are coated with thin iridium films, as this material is promising high reflectivity in the X-ray range of interest. The deposition of the iridium films is based on a magnetron sputtering process. Sputtering with different parameters, especially by variation of the argon gas pressure, leads to iridium films with different properties. In addition to investigations of the uncoated mirror substrates the achieved surface roughness has been studied. Occasional delamination of the iridium films due to high stress levels is prevented by chromium sublayers. Thereby the sputtering parameters are optimized in the context of the expected reflectivity of the coated X-ray mirrors. In near future measurements of the assembled mirror modules optical performances are planned at an X-ray test facility.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

<a href="/en/project/8E15B016" target="_blank" >8E15B016: Project JEUMICO Joint European Mirror Competence</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proc. SPIE 10235, EUV and X-ray Optics: Synergy between Laboratory and Space V

ISBN

978-1-5106-0971-6

ISSN

0277-786X

e-ISSN

1996-756X

Number of pages

8

Pages from-to

—

Publisher name

The International Society for Optical Engineering (SPIE)

Place of publication

Bellingham WA

Event location

Praha

Event date

Apr 24, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000406801200002