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  • P-ISSN 2233-4203
  • E-ISSN 2093-8950

Investigation of Ne and He Buffer Gases Cooled Ar + Ion Clouds in a Paul Ion Trap

Mass Spectrometry Letters / Mass Spectrometry Letters, (P)2233-4203; (E)2093-8950
2015, v.6 no.4, pp.112-115
Kiai S. M. Sadat (Nuclear Science and Technology Research)
Adlparvar M. Elahi S. (Nuclear Science and Technology Research)
Shafaei N. Nemati S. R. (Nuclear Science and Technology Research)
Karimi Leila (University of Zanjan)
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In this article, we examine the influences of Ne and He buffer gases under confined Ar + ion cloud in a homemade Paul ion trap in various pressures and confinement times. The trap is of small size (r 0 = 1 cm) operating in a radio frequency (rf) voltage only mode, and has limited accuracy of 13 V. The electron impact and ionization process take place inside the trap and a Faraday cup has been used for the detection. Although the experimental results show that the Ar + ion FWHM with Ne buffer gas is wider than the He buffer gas at the same pressure (1×10 -1 mbar) and confinement time is about 1000 µs, nevertheless, a faster cooling was found with He buffer gas with 500 µs. ultimetly, the obtanied results performed an average cloud tempertures reduced from 1777 K to 448.3 K for Ne (1000 µs) and from 1787.9 K to 469.4 K for He (500 µs)

Paul ion trap, rf only mode, impact electron ionization technique, buffer gas cooling ions.



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