Electron temperature estimation using the Pulse Height Analysis system at Wendelstein 7-X stellarator

This paper presents measurements of the electron temperature in Wendelstein 7-X (W7-X) stellarator plasmas heated by electron-cyclotron-resonance (ECRH) during the first operational phase (OP1.1). The analysis of the slope of the observed X-ray continuum emission (in a semi-logarithmic plot) measure...

Full description

Saved in:
Bibliographic Details
Published in:Fusion engineering and design 2018-11, Vol.136, p.1291-1294
Main Authors: Krawczyk, Natalia, Kubkowska, Monika, Czarnecka, Agata, Jablonski, Slawomir, Gruca, Marta, Fornal, Tomasz, Ryć, Leszek, Thomsen, Henning, Fuchert, Golo
Format: Article
Language:English
Subjects:
Atoms & subatomic particles
Bremsstrahlung
Continuum radiation
Cyclotron resonance
Dependence
Diagnostic systems
Electron energy
Electron temperature
Electrons
Emission analysis
Energy distribution
Hydrogen plasma
Maxwellian distribution
PHA diagnostic
Plasma physics
Plasmas
Pulse amplitude
Stellarator
Temperature
Thomson scattering
Wendelstein 7-X
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents measurements of the electron temperature in Wendelstein 7-X (W7-X) stellarator plasmas heated by electron-cyclotron-resonance (ECRH) during the first operational phase (OP1.1). The analysis of the slope of the observed X-ray continuum emission (in a semi-logarithmic plot) measured by the use of the Pulse Height Analysis (PHA) system, provides the information about the electron temperature (Te) of the hydrogen plasma. The determination of this fundamental plasma parameter is based on the exponential dependence of the continuum radiation (Bremsstrahlung) on photon energy assuming Maxwellian distribution. In this paper, some experimental results of the estimated electron temperature are presented and compared to the results obtained from the simulations of X-ray spectrum and other diagnostic like the Thomson Scattering (TS) system.
ISSN:0920-3796
1873-7196
DOI:10.1016/j.fusengdes.2018.04.120