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您的检索式：作者名="Christian LINSMEIER"
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| 1 | Argon-seeded plasma exposure and oxidation performance of tungsten-chromium-yttrium smart alloys显示文摘Tungsten-chromium-yttrium(WCrY)smart alloys are foreseen as the first wall material for future fusion devices such as Demonstration Power Plant(DEMO).While suppressing W oxidation during accidental conditions,they should behave like pure W during plasma operation due to preferential sputtering of the lighter alloying elements Cr,Y,and W enrichment of the surface.In this paper,the erosion performance of WCrY and W samples simultaneously exposed to deuterium(D)plasma with the addition of 1%of the projectile ions being argon(Ar)ions at an ion energy of 120 eV is compared.With reference to the previous experiments at 120 eV in pure D plasma,the erosion for both WCrY and W is enhanced by a factor of~7.Adding Ar to the D plasma suppresses significant W enrichment previously found for pure D plasma.To investigate the impact of the plasma exposure onto the oxidation performance,plasma-exposed and non-exposed reference samples were oxidised in a dry atmosphere.Results show,on the one hand,that the oxida-tion suppression of WCrY in comparison to pure W is preserved during the plasma performance.On the other hand,it becomes evident that edge effects imposed by the geometry of the samples used in plasma experiments play a significant role for the oxidation behaviour. | Janina Schmitz Andrey M.Litnovsky Felix Klein Xiaoyue Tan Uwe Breuer Marcin Rasinski Stephan Ertmer Arkadi Kreter Jesus Gonzalez-Julian Martin Bram Jan Willem Coenen Christian Linsmeier | 2019 | Tungsten2019，1，2： | 0 |
| 2 | Spectroscopic studies of fuel recycling and impurity behaviors in the divertor region of Wendelstein 7-X显示文摘The first divertor operation phase (OP1.2a) was carried out on Wendelstein 7-X in the second half of 2017. Fuel recycling and impurity behaviors in the divertor region were investigated by employing a newly built ultraviolet–visible–near infrared overview spectroscopy system. The characteristic spectral lines of the working gases (hydrogen and helium), intrinsic impurities (carbon, oxygen and iron), and seeded impurities (neon and nitrogen) were identified and analyzed. The divertor electron temperature and density were measured using He I (667.8, 706.5, and 728.1 nm) line intensity ratios. The Hα(656.3 nm), He I (587.6 nm), C II (514.5 nm), and O I (777.2 nm) emissions were investigated over a wide range of operating conditions. The results showed that fuel and impurity emissions in the divertor region exhibit a strong dependence on magnetic topology and plasma conditions. The levels of Hα, He I, C II, and O I emissions are all reduced moving from the standard configuration to the high mirror configuration, and even further reduced for the high iota configuration, which is associated with decreasing connection length in these island divertor configurations. The H/He influx ratio shows that the plasma is a mixture of helium and hydrogen. The neutral and impurity influxes from the divertor target tend to increase with increasing divertor electron temperature. | 魏彦玲 王二辉 梁云峰 Sebastijan BREZINSEK Maciej KRYCHOWIAK Kenneth HAMMOND Olaf NEUBAUER Ralf K?NIG Stepan SEREDA Lukas RUDISCHHAUSER Michael ENDLER Boyd BLACKWELL Christian LINSMEIER W7-X Team | 2019 | Plasma Science and Technology2019，21，10： | 0 |
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