Measurements of Neutron Yield from Deuterium Plasmas at JET by Activation Techniques

• Published in: AIP conference proceedings Vol. 993; no. 1; pp. 251 - 254
• Main Authors: Prokopowicz, R, Scholz, M, Szydlowski, A, Popovichev, S
• Format: Journal Article
• Language: English
• Published: United States 01.01.2008
• Subjects: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CADMIUM 111; CROSS SECTIONS; DAUGHTER PRODUCTS; DEUTERIUM; ENERGY SPECTRA; ERBIUM 167; FOILS; HAFNIUM 180; HALF-LIFE; LEAD 204; MEV RANGE; NEUTRON ACTIVATION ANALYSIS; NEUTRONS; NUCLEAR REACTIONS; PLASMA; PLASMA DIAGNOSTICS; PLASMA JETS; THERMONUCLEAR REACTORS; YTTRIUM 89
• ISBN: 9780735405127; 0735405123
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.2909122

The paper reports on experiments carried out at JET to test the possibility of using some activating materials (e.g. 89Y, 167Er, 204Pb, 180Hf, 111Cd, etc.) to perform multi-foil neutron activation measurements. It is shown that apart from indium other materials can be successfully used in these measurements delivering more exact information about fluxes and also energy spectra of the analysed neutrons. These and other materials have threshold energy in the interesting energy range (0.5-15 MeV) and relatively large cross sections for the nuclear reactions, but have not been used in the activation measurements supposedly because produce daughter nuclides with a relatively short half-life time. We propose then some modification of the JET activation system mainly in order to convey the activation samples faster to the detector.