{"id":10688,"date":"2024-01-07T17:04:03","date_gmt":"2024-01-07T17:04:03","guid":{"rendered":"https:\/\/www.istp.cnr.it\/?post_type=product&#038;p=10688"},"modified":"2024-01-07T17:04:03","modified_gmt":"2024-01-07T17:04:03","slug":"4d-and-5d-phase-space-tomography-using-slowing-down-physics-regularization","status":"publish","type":"product","link":"https:\/\/www.istp.cnr.it\/it\/research-product\/4d-and-5d-phase-space-tomography-using-slowing-down-physics-regularization\/","title":{"rendered":"4D and 5D phase-space tomography using slowing-down physics regularization"},"content":{"rendered":"<p>We compute reconstructions of 4D and 5D fast-ion phase-space distribution functions in fusion plasmas from synthetic projections of these functions. The fast-ion phase-space distribution functions originating from neutral beam injection (NBI) at TCV and Wendelstein 7-X (W7-X) at full, half, and one-third injection energies can be distinguished and particle densities of each component inferred based on 20 synthetic spectra of projected velocities at TCV and 680 at W7-X. Further, we demonstrate that an expansion into a basis of slowing-down distribution functions is equivalent to regularization using slowing-down physics as prior information. Using this technique in a Tikhonov formulation, we infer the particle density fractions for each NBI energy for each NBI beam from synthetic measurements, resulting in six unknowns at TCV and 24 unknowns at W7-X. Additionally, we show that installing 40 LOS in each of 17 ports at W7-X, providing full beam coverage and almost full angle coverage, produces the highest quality reconstructions.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Schmidt B.S.; Salewski M.; Moseev D.; Baquero-Ruiz M.; Hansen P.C.; Eriksson J.; Ford O.; Gorini G.; Jarleblad H.; Kazakov Y.O.; Kulla D.; Lazerson S.; Mencke J.E.; Mykytchuk D.; Nocente M.; Poloskei P.; Rud M.; Snicker A.; Stagner L.; Akaslompolo S.<\/p>\n","protected":false},"featured_media":1294,"comment_status":"closed","ping_status":"open","template":"","meta":[],"product_cat":[574],"product_tag":[964,1182,2515,4713,741,895],"class_list":["post-10688","product","type-product","status-publish","has-post-thumbnail","hentry","product_cat-journal-articles","product_tag-nbi","product_tag-fast-ions","product_tag-tomography","product_tag-slowing-down","product_tag-stellarator","product_tag-tokamak","prodpage-style2"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/product\/10688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/comments?post=10688"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/media\/1294"}],"wp:attachment":[{"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/media?parent=10688"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/product_cat?post=10688"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/product_tag?post=10688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}