A near infra-red video system as a protective diagnostic for electron cyclotron resonance heating operation in the Wendelstein 7-X stellarator

Journal Article · Sun Nov 15 04:00:00 EST 2015 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4935686· OSTI ID:22482597

Preynas, M.; Laqua, H. P.; Marsen, S.; Reintrog, A. ^[1]; Corre, Y.; Moncada, V.; Travere, J. -M. ^[2]

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1. Max-Planck-Institut für Plasmaphysik (IPP), D-17491 Greifswald (Germany)
2. IRFM, CEA-Cadarache, 13108 Saint Paul lez Durance Cedex (France)

The Wendelstein 7-X stellarator is a large nuclear fusion device based at Max-Planck-Institut für Plasmaphysik in Greifswald in Germany. The main plasma heating system for steady state operation in W7-X is electron cyclotron resonance heating (ECRH). During operation, part of plama facing components will be directly heated by the non-absorbed power of 1 MW rf beams of ECRH. In order to avoid damages of such components made of graphite tiles during the first operational phase, a near infra-red video system has been developed as a protective diagnostic for safe and secure ECRH operation. Both the mechanical design housing the camera and the optical system are very flexible and respect the requirements of steady state operation. The full system including data acquisition and control system has been successfully tested in the vacuum vessel, including on-line visualization and data storage of the four cameras equipping the ECRH equatorial launchers of W7-X.

• OSTI ID: 22482597
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 11 Vol. 86; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BEAMS
CAMERAS
CONTROL SYSTEMS
DATA ACQUISITION
DESIGN
ECR HEATING
GRAPHITE
OPERATION
OPTICAL SYSTEMS
STEADY-STATE CONDITIONS
THERMONUCLEAR DEVICES