@inproceedings{ca59209ea45045b7893b3563bab2198f,
title = "Surface plasma source electrode activation by surface impurities",
abstract = "In experiments with RF saddle antenna surface plasma sources (SPS), the efficiency of H- ion generation was increased by up to a factor of 5 by plasma electrode {"}activation{"}, without supplying additional Cs, by heating the collar to high temperature for several hours using hot air flow and plasma discharge. Without cracking or heating the cesium ampoule, but likely with Cs recovery from impurities, the achieved energy efficiency was comparable to that of conventionally cesiated SNS RF sources with an external or internal Cs supply. In the experiments, optimum cesiation was produced (without additional Cs) by the collection and trapping of traces of remnant cesium compounds from SPS surfaces. Such activation by accumulation of impurities on electrode surfaces can be a reason for H- emission enhancement in other so-called {"}volume{"} negative ion sources.",
keywords = "Cesiation, N{\'e}gative ion, RF discharge, Surface plasma sources",
author = "Vadim Dudnikov and B. Han and Johnson, {Rolland P.} and Murray, {S. N.} and Pennisi, {T. R.} and M. Santana and Stockli, {Martin P.} and Welton, {R. F.}",
year = "2011",
doi = "10.1063/1.3637412",
language = "English",
isbn = "9780735409552",
series = "AIP Conference Proceedings",
pages = "411--421",
booktitle = "Second International Symposium on Negative Ions, Beams and Sources, NIBS2010",
note = "2nd International Symposium on Negative Ions, Beams and Sources, NIBS2010 ; Conference date: 16-11-2010 Through 19-11-2010",
}
