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

Finocchiaro G., Bezmalinovich M., Biri S., Emma G., Mauro G. S., Mazzaglia M., Mishra B., Naselli E., Pidatella A., Ràcz R., Santonocito D., Torrisi G., Mascali D.
  Giovedì 15/09   09:00 - 13:00   Aula B - Maria Goeppert-Mayer   I - Fisica nucleare e subnucleare   Presentazione
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.