found: Work cat.: Dugan, John V. Three-body collisional recombination of cesium seed ions and electrons in high-density plasmas with argon carrier gas, 1964.
found: FSI International, commercial web site, via WWW, June 8, 2003:"about FSI" at top menu; "glossary" at side menu ("HDP: High-density plasma; plasma with higher concentration of electrons and reactive species")
found: M+W Zander, commercial web site, via WWW, June 8, 2003:English version at home page "glossary" at top menu of English version main page ("High density plasma (HDP) - Plasma with a high concentration of reactive elements in it")
found: OCLC WorldCAT, May 12, 2003(titles: Experimental investigation of high-density plasmas in field-reversed configurations, 1983; Atomic processes in high-density plasmas, 1982; Research studies of high-density plasmas, 1967)
notfound: McGraw-Hill dictionary of scientific and technical terms, 2003;Academic Press dictionary of science and technology, 1992;Chambers dictionary of science and technology, 1999;Encyclopedia of physical science and technology, 2002