English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present in this paper an update on the design of BEaTriX (Beam ExpanderTesting X-ray facility), an X-ray apparatus to be realized at INAF/OAB and thatwill generate an expanded, uniform and parallel beam of soft X-rays. BEaTriXwill be used to perform the functional tests of X-ray focusing modules of largeX-ray optics such as those for the ATHENA X-ray observatory, using the SiliconPore Optics (SPO) as a baseline technology, and Slumped Glass Optics (SGO) as apossible alternative. Performing the tests in X-rays provides the advantage ofan in-situ, at-wavelength quality control of the optical modules produced inseries by the industry, performing a selection of the modules with the bestangular resolution, and, in the case of SPOs, there is also the interestingpossibility to align the parabolic and the hyperbolic stacks directly underX-rays, to minimize the aberrations. However, a parallel beam with divergencebelow 2 arcsec is necessary in order to measure mirror elements that areexpected to reach an angular resolution of about 4 arcsec, since the ATHENArequirement for the entire telescope is 5 arcsec. Such a low divergence overthe typical aperture of modular optics would require an X-ray source to belocated in a several kilometers long vacuum tube. In contrast, BEaTriX will becompact enough (5 m x 14 m) to be housed in a small laboratory, will produce anexpanded X-ray beam 60 mm x 200 mm broad, characterized by a very lowdivergence (1.5 arcsec HEW), strong polarization, high uniformity, and X-rayenergy selectable between 1.5 keV and 4.5 keV. In this work we describe theBEaTriX layout and show a performance simulation for the X-ray energy of 4.5keV.

BEaTriX, expanded X-ray beam facility for testing modular elements of telescope optics: an update