OHMIC ION TEMPERATURE AND THERMAL-DIFFUSIVITY PROFILES FROM THE JET NEUTRON EMISSION PROFILE MONITOR

Authors
ESPOSITO B MARCUS FB ADAMS JM CONROY S JARVIS ON LOUGHLIN MJ SADLER G VANBELLE P WATKINS N
Citation
B. Esposito et al., OHMIC ION TEMPERATURE AND THERMAL-DIFFUSIVITY PROFILES FROM THE JET NEUTRON EMISSION PROFILE MONITOR, Plasma physics and controlled fusion, 35(10), 1993, pp. 1433-1440
Citations number
9
Categorie Soggetti
Phsycs, Fluid & Plasmas
Journal title
Plasma physics and controlled fusion → ACNP
ISSN journal
07413335
Volume
35
Issue
10
Year of publication
1993
Pages
1433 - 1440
Database
ISI
SICI code
0741-3335(1993)35:10<1433:OITATP>2.0.ZU;2-L
Abstract
The JET neutron emission profile monitor was used to study ohmically h eated deuterium discharges. The radial profile of the neutron emissivi ty is deduced from the line-integral data. The profiles of ion tempera ture, T(i), and ion thermal diffusivity, chi(i), are derived under ste ady-state conditions. The inferred chi(i), for 0.3 < rho = r/a < 0.5, is in the range 0.5-2.5 m2 s-1. The ion thermal diffusivity is higher than, and its scaling with plasma current opposite to, that predicted by neoclassical theory.