title: Development of C(60) plasma ion source for time-of-flight secondary ion mass spectrometry applications.
abstract: Initial data from a multicusp ion source developed for buckminsterfullerene (C(60)) cluster ion production are reported in this article. A C(60)(+) beam current of 425 nA and a C(60)(-) beam current of 200 nA are obtainable in continuous mode. Compared to prior work using electron impact ionization, the multicusp ion source provides at least two orders of magnitude increase in the extractable C(60)(+) beam current. Mass spectra for both positive and negative bismuth cluster ions generated by the multicusp ion source are also included.
authors.affiliation: Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720, USA.
authors.forename: Qing
authors.initials: Q
authors.lastname: Ji
authors.forename: Ye
authors.initials: Y
authors.lastname: Chen
authors.forename: Lili
authors.initials: L
authors.lastname: Ji
authors.forename: Sami
authors.initials: S
authors.lastname: Hahto
authors.forename: Ka-Ngo
authors.initials: KN
authors.lastname: Leung
authors.forename: Tae Geol
authors.initials: TG
authors.lastname: Lee
authors.forename: Dae Won
authors.initials: DW
authors.lastname: Moon
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D037741:Fullerenes / Q000737:chemistry*; D005740:Gases / Q000737:chemistry; D006361:Heating / Q000295:instrumentation*; D020450:Heavy Ions; D021241:Spectrometry, Mass, Electrospray Ionization / Q000295:instrumentation*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000295:instrumentation*
chemical_list: D037741:Fullerenes; D005740:Gases; C069837:fullerene C60