First results from the implementation of the ITER diagnostic residual gas analyzer prototype at Wendelstein 7-X
- Max Planck Inst. fur Plasmaphysik, Greifswald (Germany)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
Fusion reactors and long pulse fusion experiments heavily depend on a continuous fuel cycle, which requires detailed monitoring of exhaust gases. We have used a diagnostic residual gas analyzer (DRGA) built as a prototype for ITER and integrated it on the most advanced stellarator fusion experiment, Wendelstein 7-X (W7-X). The DRGA was equipped with a sampling tube and assessed for gas time of flight sample response, effects of magnetic field on gas detection and practical aspects of use in a state of the art fusion environment. The setup was successfully commissioned and operated and was used to observe the gas composition of W7-X exhaust gases. The measured time of flight gas response was found to be in the order of a second for a 7 m sample tube. High values of magnetic field were found to affect the partial pressure readings of the DRGA and suggest that additional shielding is necessary in future experimental campaigns.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Contributing Organization:
- W7-X team
- Grant/Contract Number:
- AC05-00OR22725; AC05-00OR2272
- OSTI ID:
- 1564109
- Alternate ID(s):
- OSTI ID: 1560250
- Journal Information:
- Review of Scientific Instruments, Vol. 90, Issue 9; ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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