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The diagnostic neutral beam injector with arc-discharge plasma source on the TCV Tokamak
- Publisher :
- Elsevier B.V.
-
Abstract
- The diagnostic neutral beam injector (DNBI) together with a charge exchange recombination spectroscopy (CXRS) system has been used on the TCV Tokamak as a diagnostic tool for local measurements of plasma ion temperature, velocity and carbon impurity density based on analysis of the beam induced impurity radiation emission since 2000. To improve the performance of the CXRS diagnostic, several upgrades of both the optical system and the neutral beam were performed. An increase of the plasma source size together with beam optimization in 2003 resulted in a twofold increase the beam current. The RF plasma generator was replaced by an arc-discharge plasma source together with a new ion optical system (IOS) in 2006 and subsequent beam optimization is presented herein. This was designed to increase the line brightness of the beam in the CXRS observation region without increasing of the injected power (to avoid plasma perturbation by the beam). The beam characteristics are measured by a multi-chord scanning of Doppler-shifted Hα emission, thermal measurements on a movable calorimeter and visible optical measurements inside the Tokamak vessel.
- Subjects :
- Tokamak
Materials science
Diagnostic neutral beam injector
Mechanical Engineering
TCV Tokamak
Plasma
Fusion power
Temperature measurement
Charge
law.invention
Ion
Electric arc
Nuclear Energy and Engineering
law
Physics::Plasma Physics
exchange recombination spectroscopy
Physics::Accelerator Physics
General Materials Science
Electric current
Atomic physics
Spectroscopy
Civil and Structural Engineering
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....3539d740ea253d9db8070373192f5a86