Increased atomic hydrogen flux from a cascaded arc plasma source by changing the nozzle geometry

P.J.W. Vankan, R.A.H. Engeln, D.C. Schram

Research output: Contribution to journalArticleAcademicpeer-review

12 Citations (Scopus)
98 Downloads (Pure)

Abstract

A very high flux of hydrogen atoms with energies in the eV range has been obtained by using a thermal plasma source and by optimization of the nozzle exit geometry. It proves that the flux of hydrogen atoms emerging from a cascaded arc plasma source depends strongly on the geometry of the nozzle. By decreasing the nozzle length by a factor 2, the atomic hydrogen flux is increased by a factor of 13, and a further increase of a factor of 2.5 can be obtained by increasing the nozzle diameter. The resulting atomic hydrogen flux is 1.2×1021 s–1, corresponding to a dissociation degree of over 30%. It is argued that the main loss channel for atomic hydrogen is surface recombination, and that by using nozzle geometries that reduce the surface loss, the atomic flux is increased.
Original languageEnglish
Article number101501
Pages (from-to)101501-1/3
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number10
DOIs
Publication statusPublished - 2005

Fingerprint Dive into the research topics of 'Increased atomic hydrogen flux from a cascaded arc plasma source by changing the nozzle geometry'. Together they form a unique fingerprint.

Cite this