%0 Report
%9 PRP
%X Participation in the development of the Fast Neutral Lithium Beam (FNLB)probe and its application for the measurements of density and its fluctuation profiles in the edge and divertor regions of CHS plasma confinement device CHS (Compact Helical System)is a toroidal device of heliotron/torsatron type used for the study of plasmas for nuclear fusion research. It is a medium size device which is been used as a support machine for LHD (Large Helical Device), the largest helical device in the world and the main plasma machine under operation at NIFS, presently. One of the objectives of the present experiment of FNLB in CHS is the accomplishment of plasma diagnostics in the stochastic layers as well as of the separatrix region, in a two dimensional way. Therefore, the neutral beam source is provided with a system with sweeping angle capability, in order to cover adequately those regions of the plasma edge. The experimental set-up is shown in Fig. 1. A beam comprising of neutral lithium atoms with energies of 10- 15 kV and with equivalent currents of about 5O- 150 æ A is injected into the CHS plasma. The beam emission due to the bombardment of electrons from the plasma is then collected through the lens and the image of the emitting beam is analyzed with spatial resolution by using a fiber optic array, band pass filter (8 channels)and a optical spectrometer (1 channel), The photon emission profile along the beam is then obtained from which the plasma electron density profile is calculated. Also from the same photon emission data it is possible to obtain the local density fluctuation if the intensity of the beam is sufficiently high.
%@secondarydate 20020629
%@ INPE-8937-PRP/230
%T Report of scientific visit to NIFS
%K FÍSICA DE PLASMA, feixes neutros, diagnósticos do plasma, edge plasma diagnostic, neutral beams, toroidal plasmas, plasma diagnostics.
%@nexthigherunit 8JMKD3MGPCW/3ET2RFS
%P 10
%@usergroup administrator
%@usergroup simone
%@group LAP-INPE-MCT-BR
%3 8937.pdf
%C São José dos Campos
%F 9908
%2 sid.inpe.br/iris@1905/2005/08.03.21.08.32
%I INPE
%@project FUSÃO
%4 sid.inpe.br/iris@1905/2005/08.03.21.08
%@documentstage simone
%D 2002
%A Ueda, Mário,
%@area FISPLASMA
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}