TITLE

Fullerenes in electron cyclotron resonance ion sources

AUTHOR(S)
Biri, S.; Fekete, É.; Kitagawa, A.; Muramatsu, M.; Jánossy, A.; Pálinkás, J.
PUB. DATE
March 2006
SOURCE
Review of Scientific Instruments;Mar2006, Vol. 77 Issue 3, p03A314
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Fullerene plasmas and beams have been produced in our electron cyclotron resonance ion sources (ECRIS) originally designed for other purposes. The ATOMKI-ECRIS is a traditional ion source with solenoid mirror coils to generate highly charged ions. The variable frequencies NIRS-KEI-1 and NIRS-KEI-2 are ECR ion sources built from permanent magnets and specialized for the production of carbon beams. The paper summarizes the experiments and results obtained by these facilities with fullerenes. Continuous effort has been made to get the highest C60 beam intensities. Surprisingly, the best result was obtained by moving the C60 oven deep inside the plasma chamber, very close to the resonance zone. Record intensity singly and doubly charged fullerene beams were obtained (600 and 1600 nA, respectively) at lower C60 material consumption. Fullerene derivatives were also produced. We mixed fullerenes with other plasmas (N, Fe) with the aim of making new materials. Nitrogen encapsulated fullerenes (mass: 720+14=734) were successfully produced. In the case of iron, two methods (ferrocene, oven) were tested. Molecules with mass of 720+56=776 were detected in the extracted beam spectra.
ACCESSION #
20618132

 

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