Abstract
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.
| Original language | English |
|---|---|
| Article number | 093501 |
| Journal | Review of Scientific Instruments |
| Volume | 90 |
| Issue number | 9 |
| DOIs | |
| State | Published - Sep 1 2019 |
Funding
This work was supported in part by the U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences, under Grant No. DE-AC05-00OR2272. This work was carried out within the framework of the EUROfusion Consortium and received funding from the Euratom research and training programme 2014\u20132018 and 2019\u20132020 under Grant Agreement No. 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.