Polycapillary optics for soft X-ray imaging and tomography

Pacella, Danilo and Dabagov, S. and Murtas, F. and Romano, A. and Hampai, D. and Gabellieri, L. and Mazon, D. (2011) Polycapillary optics for soft X-ray imaging and tomography. Il nuovo cimento C, 34 (4). pp. 513-520. ISSN 1826-9885

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Magnetic plasmas are extended volumetric sources of X-rays, and these emissions could reveal a lot of information about the processes occurring into the plasmas. Unfortunately, the constraints posed by these toroidal devices (high neutron flux, gamma and hard-X background, extremely high radiofrequency powers, high magnetic fields, optical limitations and so on) are very severe and limit strongly the possibility to install X-ray detectors directly into or close to the machine. Soft X-ray diagnostics are meant both as tomography and imaging. We started, therefore, to investigate the feasibility of using polycapillary optics for these purposes, in collaboration between Istituto Nazionale di Fisica Nucleare (INFN)- Frascati, Ente per le Nuove tecnologie, l’Energia e l’Ambiente (ENEA)-Frascati and the Commissariat de l’Energie Atomique (CEA)-Cadarache. The first tests were performed in order to characterize the polycapillary lenses (convergence, divergence, efficiency, spectral dispersion, etc.) for distances much larger than the optical focal length of the lenses, both for the detector and for the source. A silicon-based C-MOS imager (Medipix 2) has been used as a detector and the micro focus X-ray tubes as point-like sources. Results of these preliminary tests are presented, and the imaging capabilities of a polycapillary lens as well.

Item Type: Article
Uncontrolled Keywords: X-ray beams and X-ray optics ; X- and γ-ray instruments ; Components and instrumentation
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 07 Apr 2020 20:27
Last Modified: 07 Apr 2020 20:27
URI: http://eprints.bice.rm.cnr.it/id/eprint/17404

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