An image filtering technique for SPIDER visible tomography

N Fonnesu; M Agostini; M Brombin; R Pasqualotto; G Serianni

doi:10.1063/1.4850738

An image filtering technique for SPIDER visible tomography

Rev Sci Instrum. 2014 Feb;85(2):02A730. doi: 10.1063/1.4850738.

Authors

N Fonnesu¹, M Agostini¹, M Brombin¹, R Pasqualotto¹, G Serianni¹

Affiliation

¹ Consorzio RFX, Associazione EURATOM-ENEA sulla Fusione, Corso Stati Uniti 4, I-35127 Padova, Italy.

PMID: 24593464
DOI: 10.1063/1.4850738

Abstract

The tomographic diagnostic developed for the beam generated in the SPIDER facility (100 keV, 50 A prototype negative ion source of ITER neutral beam injector) will characterize the two-dimensional particle density distribution of the beam. The simulations described in the paper show that instrumental noise has a large influence on the maximum achievable resolution of the diagnostic. To reduce its impact on beam pattern reconstruction, a filtering technique has been adapted and implemented in the tomography code. This technique is applied to the simulated tomographic reconstruction of the SPIDER beam, and the main results are reported.