Articolo in rivista, 2013, ENG, 10.1088/0741-3335/55/7/074014

Diagnosis of physical parameters of fast particles in high power fusion plasmas with high resolution neutron and gamma-ray spectroscopy

M Tardocchi (1); M Nocente (1,2); and G Gorini (1,2)

(1) Istituto di Fisica del Plasma, EURATOM-ENEA-CNR Association, Milano, Italy (2) Dipartimento di Fisica 'G. Occhialini', Università degli Studi di Milano Bicocca, Milano, Italy

High resolution neutron emission spectroscopy (NES) and gamma-ray spectroscopy (GRS) measurements of fast ions in high power fusion plasmas are reviewed. NES is a well established diagnostics of the velocity distribution of fast fuel ions and was recently used to investigate the interaction of energetic ions with MHD instabilities. High energy resolution GRS on fusion plasmas is a more recent application and was shown to provide information on the distribution function of fast minority ions accelerated by ICRH, such as He-4 and He-3. Starting from measurements on today's high power D plasmas, fast ion measurements with NES and GRS in a DT burning plasma of next step tokamaks, such as ITER, are discussed. The enhanced neutron and gamma-ray fluxes expected on ITER will allow for time-resolved measurements of the fast fuel and minority ion dynamics in the ms time scale. The intensity of the alpha knock-on component in the 14 MeV neutron spectrum and of the 4.44 and 3.21 MeV gamma-ray peaks from the Be-9(alpha,n gamma) C-12 reaction is studied as a diagnostics for the alpha particle slowing down distribution in a DT plasma. The results show that the two techniques are sensitive to different regions of the alpha particle phase space and thus provide complementary information.

Plasma physics and controlled fusion (Online) 55 (7), pp. 074014–?

Keywords

_____

CNR authors

Gorini Giuseppe, Nocente Massimo, Tardocchi Marco

CNR institutes

IFP – Istituto di fisica del plasma "Piero Caldirola"

ID: 246823

Year: 2013

Type: Articolo in rivista

Creation: 2013-08-05 10:29:07.000

Last update: 2016-03-11 14:43:03.000

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:246823

DOI: 10.1088/0741-3335/55/7/074014

ISI Web of Science (WOS): 000320373200015

Scopus: 2-s2.0-84879108632