Video diagnostic for W7-X stellarator

J. Sárközi, K. Grosser, G. Kocsis, R. König, U. Neuner, Á Molnár, G. Petravich, G. Por, G. Porempovics, S. Récsei, V. Szabó, A. Szappanos, S. Zoletnik

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The video diagnostics for W7-X - which is under development - is devoted to observe plasma and frrst wall elements during operation, to warn in case of hot spots and dangerous heat load and to give information about the plasma size, position, edge structure, the geometry and location of magnetic islands and distribution of impurities. The video diagnostics will be mounted on the tangential AEQ-ports of the torus that are not straight and have about 2m length and a typical diameter of 0.1m which makes its realization more difficult. The geometry of the 10 tangential views of the AEQ-ports allows giving an almost complete overview of the vessel interior making this diagnostic indispensable for the machine operation. Different concepts of the diagnostics were investigated and finally the following design was selected. As a large heat load is expected on the optical window located at the plasma-facing end of the AEQ-port, the port window is protected by a cooled pinhole. An uncooled shutter located behind the pinhole can be closed to prevent window contamination during vessel conditioning discharges (glow discharge cleaning) and from inter-pulse deposition of soft a-C:H layers. The imaging optics and the detection sensor are located behind the port window in the port tube, which will be under atmospheric pressure. To detect the visible radiation distribution a new camera system called Event Detection Intelligent Camera (EDICAM) is under development. The system is divided into three major separated components. The Sensor Module contains only the selected CMOS sensor, the analog digital converters and the minimal electronics necessary for the communication with the subsequent camera system module called Image Processing and Control Unit (IPCU). Its simple structure makes the Sensor Module suitable to operate despite being exposed to ionizing (neutron, γ-) radiation. The IPCU, which can be located far from the Sensor Module and therefore far from the plasma, is designed to perform real time evaluation of the images detecting predefined events, managing the sensor read-out and the input triggers and producing the output triggers generated by the detected events. The IPCU can also be used to reduce the amount of the stored data. A Standard 10 Gigabit Ethernet fiber optics connection connects the IPCU module to the PC with GigEVision communication protocol.

Original languageEnglish
Title of host publicationPlasma 2007 - Proceedings Intl. Conf. on Research and Applications of Plasmas
Subtitle of host publication4th German-Polish Conference on Plasma Diagnostics for Fusion and Applications
Pages175-178
Number of pages4
DOIs
Publication statusPublished - 2008
EventInternational Conference PLASMA 2007 on Research and Applications of Plasmas: 4th German-Polish Conference on Plasma Diagnostics for Fusion and Applications - 6th French-Polish Seminar on Thermal Plasma in Space and Laboratory - Greifswald, Germany
Duration: Oct 16 2007Oct 19 2007

Publication series

NameAIP Conference Proceedings
Volume993
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Conference PLASMA 2007 on Research and Applications of Plasmas: 4th German-Polish Conference on Plasma Diagnostics for Fusion and Applications - 6th French-Polish Seminar on Thermal Plasma in Space and Laboratory
CountryGermany
CityGreifswald
Period10/16/0710/19/07

Keywords

  • Event recognition.
  • Plasma diagnostics
  • Stellarator
  • Video camera

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Video diagnostic for W7-X stellarator'. Together they form a unique fingerprint.

  • Cite this

    Sárközi, J., Grosser, K., Kocsis, G., König, R., Neuner, U., Molnár, Á., Petravich, G., Por, G., Porempovics, G., Récsei, S., Szabó, V., Szappanos, A., & Zoletnik, S. (2008). Video diagnostic for W7-X stellarator. In Plasma 2007 - Proceedings Intl. Conf. on Research and Applications of Plasmas: 4th German-Polish Conference on Plasma Diagnostics for Fusion and Applications (pp. 175-178). (AIP Conference Proceedings; Vol. 993). https://doi.org/10.1063/1.2909102