{"product_id":"impurity-effects-on-deuterium-retention-in-single-crystal-tungsten-von-aaron-d-quastel","title":"Impurity Effects on Deuterium Retention in Single Crystal Tungsten","description":"\u003cp\u003eTungsten will be used in the divertor section of  the ITER fusion reactor. The divertor is exposed to  fluxes of deuterium, tritium, helium and other  plasma nuclei. The role of impurities in the  retention of deuterium in single crystal tungsten  at room temperature has been investigated. To avoid  the effects of air exposure, the D implantation and  the subsequent D retention measurement using TDS  was performed in the same vacuum chamber without  breaking vacuum. For fluences of 1x10^23 D\/m^2,  desorption peaks were observed, at ~400 K and at  ~600 K. The use of liquid nitrogen cooling of the  ion beam aperture led to a reduction of the  background gas impurities in the vacuum test  chamber, which almost completely eliminated the  post-irradiation TDS peak at 400 K. Reduction of  these gas impurities has led to a reduction in the  total deuterium retention. Furthermore, implanted  deuterium in the W specimens was released when the  vacuum system was gently baked before TDS,  resulting in an additional reduction in the total  amount of retained D. It was also found that post- implantation time delay before performing TDS lead  to a significant loss of the implanted deuterium.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783838309583\"\u003e\u003ch3\u003ePlasma-Surface Interaction, Plasma Facing Materials in Fusion Reactors - Fusion Research\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783838309583","offer_id":39469198966877,"sku":"9783838309583","price":49.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/31841f81-631b-4939-8644-67b7a4bd7381.jpg?v=1758876452","url":"https:\/\/shop.autorenwelt.de\/products\/impurity-effects-on-deuterium-retention-in-single-crystal-tungsten-von-aaron-d-quastel","provider":"Autorenwelt Shop","version":"1.0","type":"link"}