{"id":6664,"date":"2020-02-12T12:16:06","date_gmt":"2020-02-12T12:16:06","guid":{"rendered":"https:\/\/www.istp.cnr.it\/?post_type=product&#038;p=6664"},"modified":"2022-06-21T09:57:13","modified_gmt":"2022-06-21T09:57:13","slug":"mapping-of-magnetic-field-of-spider-by-a-three-axis-automatic-positioning-system-3","status":"publish","type":"product","link":"https:\/\/www.istp.cnr.it\/it\/research-product\/mapping-of-magnetic-field-of-spider-by-a-three-axis-automatic-positioning-system-3\/","title":{"rendered":"Mapping of Magnetic Field of SPIDER by a Three-Axis Automatic Positioning System"},"content":{"rendered":"<p>SPIDER  is  the  prototype  of  the  ion  source  of  the neutral beam injector (NBI) for ITER, and is currently in operation at the Neutral Beam Test Facility (NBTF), Consorzio RFX,Padova,  Italy.  The  magnetic  field  is  important  in  SPIDER  and,in general, in negative ion sources. It is required for filtering the fast electrons in the plasma source (magnetic filter field), thus for enhancing the negative ion production rate, and for suppressing the coextracted electrons in the accelerator (electron suppression field).   In   order   to   measure   and   map   the   magnetic   field   in SPIDER,  a  positioning  system  has  been  designed  and  realized,then applied with success during 2018. A three-axis system holds a  Hall  probe, and  can  be  controlled  manually  or  remotely  by  a graphical  user  interface.  Once  the  three-axis  system  is  installed on SPIDER, it can be programed to automatically move through the 1280 accelerator apertures and acquire magnetic field profiles.The  development  of  this  programable  system  allowed  saving  a considerable  amount  of  time.  This  article  describes  the  design and the realization  of  the magnetic  field mapping system,  along with the results of the measuring campaigns carried out in 2018 and the  comparison  with numerical  models.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aprile Daniele; Agostinetti Piero; Denizeau Sylvestre; Chitarin Giuseppe<\/p>\n","protected":false},"featured_media":1294,"comment_status":"closed","ping_status":"open","template":"","meta":[],"product_cat":[574],"product_tag":[852,1080],"class_list":["post-6664","product","type-product","status-publish","has-post-thumbnail","hentry","product_cat-journal-articles","product_tag-magnetic-field","product_tag-neutral-beam-injector-nbi","prodpage-style2"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/product\/6664","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=6664"}],"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=6664"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/product_cat?post=6664"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.istp.cnr.it\/it\/wp-json\/wp\/v2\/product_tag?post=6664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}