Linked Life Data

21361594

Source:http://linkedlifedata.com/resource/pubmed/id/21361594

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2011-3-2
pubmed:abstractText
Cesium seeded sources for surface generated negative hydrogen ions are major components of neutral beam injection systems in future large-scale fusion experiments such as ITER. The stability and delivered current density depend highly on the work function during vacuum and plasma phases of the ion source. One of the most important quantities that affect the source performance is the work function. A modified photocurrent method was developed to measure the temporal behavior of the work function during and after cesium evaporation. The investigation of cesium exposed Mo and MoLa samples under ITER negative hydrogen ion based neutral beam injection relevant surface and plasma conditions showed the influence of impurities which result in a fast degradation when the plasma exposure or the cesium flux onto the sample is stopped. A minimum work function close to that of bulk cesium was obtained under the influence of the plasma exposition, while a significantly higher work function was observed under ITER-like vacuum conditions.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Feb
pubmed:issn
1089-7623
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
82
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
023506
pubmed:year
2011
pubmed:articleTitle
Work function measurements during plasma exposition at conditions relevant in negative ion sources for the ITER neutral beam injection.
pubmed:affiliation
Max-Planck-Institut fu?r Plasmaphysik, EURATOM Association, Garching, Germany. raphael.gutser@ipp.mpg.de
pubmed:publicationType
Journal Article