1. bookVolume 61 (2016): Issue 2 (June 2016)
Journal Details
License
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
access type Open Access

Applicability of the dielectric barrier discharge for helium ash measurements in the divertor region

Published Online: 15 Jun 2016
Volume & Issue: Volume 61 (2016) - Issue 2 (June 2016)
Page range: 99 - 102
Received: 25 Sep 2015
Accepted: 17 Nov 2015
Journal Details
License
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
Abstract

Controlled fusion based on the magnetic confinement of the plasma is one of the main aims of the Euro-fusion programme. In the fusion device, the hydrogen isotopes, in nuclear reactions, will produce helium nuclei. The products, as the ash, will be removed from the plasma in the region of the so-called divertor. Controlling the helium to hydrogen ratio in this ‘exhaust gas’ will provide information about the efficiency of the fusion process as well as of the efficiency of the helium removal system. One of the methods to perform this task is to study the properties of the discharge conducted in such exhaust gas. In this paper, the applicability of the dielectric barrier discharge (DBD) is studied. This preliminary experiment shows a great potential in applicability of this kind of discharge. The optical as well as pulse-height spectra were studied, both revealing very promising properties. In the optical spectrum, one can observe well separated hydrogen and helium spectral lines, with intensities of the same order of magnitude. Moreover, in the registered spectral region, the molecular spectra are negligible. The pulse-height spectra reveal very distinct shape in helium and hydrogen. Checking of this spectrum could provide parallel (redundant) information about the partial pressure of helium in the magnetic confinement fusion (MCF) device exhaust gas.

Keywords

1. Finken, K. H., Dippel, K. H., Baek, W. Y., & Hardtke, A. (1992). Measurement of helium gas in a deuterium environment. Rev. Sci. Instrum., 63(1), 1-7.10.1063/1.1142957Search in Google Scholar

2. Denner, T., Finken, K. H., & Mank, G. (1996). Helium partial pressure measurement in a deuterium environment. Rev. Sci. Instrum., 67(10), 3515-3520.10.1063/1.1147169Search in Google Scholar

3. Kogelschatz, U. (2003). Dielectric-barrier discharges: Their history, discharge physics and industrial applications. Plasma Chem. Plasma Process., 23(1), 1-46.10.1023/A:1022470901385Search in Google Scholar

4. De Geyter, N., Morent, R., & Leys, C. (2006). Surface modification of a polyester non-woven with a dielectric barrier discharge in air at medium pressure. Surf. Coat. Technol., 201, 2460-2466.10.1016/j.surfcoat.2006.04.004Search in Google Scholar

5. Morent, R., De Geyter, N., Leys, C., Gengembre, L., & Payen, E. (2007). Surface modification of non-woven textiles using a dielectric barrier discharge operating in air, helium and argon at medium pressure. Text. Res. J., 77(7), 471-488.10.1177/0040517507080616Search in Google Scholar

6. Fridman, G., Peddinghaus, M., & Ayan, H. (2006). Blood coagulation and living tissue sterilization by floating-electrode dielectric barrier discharge in air. Plasma Chem. Plasma Process., 26, 425-442.10.1007/s11090-006-9024-4Search in Google Scholar

7. Eto, H., Ono, Y., & Ogino, A. (2008). Low-temperature internal sterilization of medical plastic tubes using a linear dielectric barrier discharge. Plasma Process. Polym., 5(3), 269-274.10.1002/ppap.200700076Search in Google Scholar

8. Kusz, J. (1992). Intensities and transition probabilities for selected DyI and DyII lines emitted from a ferroelectric plasma source. Astron. Astrophys. Suppl. Ser., 92, 517-532.Search in Google Scholar

9. Goly, A., Kusz, J., Nguyen Quang, B., & Weniger, S. (1991). Transition probabilities of PrII-lines emitted from a ferroelectric plasma source. J. Quant. Spectrosc. Radiat. Transfer, 45(3), 157-163.10.1016/0022-4073(91)90005-BSearch in Google Scholar

10. Kogelschatz, U. (2010). Collective phenomena in volume and surface barrier discharges. J. Phys. Conf. Ser., 257, 1-12. DOI: 10.1088/1742-6596/257/1/012015.10.1088/1742-6596/257/1/012015Search in Google Scholar

Recommended articles from Trend MD

Plan your remote conference with Sciendo