Space-resolved characterization of X-ray emission from an ECR magneto-plasma in the PANDORA project frame.

Theoretical predictions suggest that the behavior of $\beta$-decays can dramatically change in relation to the ionization state of in-plasma isotopes. The PANDORA project aims at measuring nuclear $\beta$-decays in stellar-like conditions in high-temperature plasmas confined in B-minimum magnetic traps, which require a continuous monitoring of plasma parameters. X-ray space-resolved emission characterization can provide relevant features of the magneto-plasma in terms of distribution of its density and temperature. We arranged a full-field X-ray pin-hole setup consisting in a $400 \mu m$ hole in a lead disk coupled with a 4MP X-ray ({2\mbox$--$20 ${keV}$) CCD camera. For the first time the system was coupled to a Pt-Ir shutter to suppress the readout noise, thus permitting SPhC (single photon counting) acquisitions at low exposure times, fixed at $10 {ms}$ during the experiment. In the Flexible Plasma Trap (used as test bench for the PANDORA project) we arranged an X-ray diagnostic line to perform measurements by exciting a plasma of air and argon. First collected images have been processed by an original algorithm to obtain energy-resolved imaging.