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Investigation of Ne and He Buffer Gases Cooled Ar+ Ion Clouds in a Paul Ion Trap
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  • Journal title : Mass Spectrometry Letters
  • Volume 6, Issue 4,  2015, pp.112-115
  • Publisher : Korean Society Mass Spectrometry
  • DOI : 10.5478/MSL.2015.6.4.112
 Title & Authors
Investigation of Ne and He Buffer Gases Cooled Ar+ Ion Clouds in a Paul Ion Trap
Kiai, S.M. Sadat; Elahi, M.; Adlparvar, S.; Nemati, N.; Shafaei, S.R.; Karimi, Leila;
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 Abstract
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 (r0 = 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)
 Keywords
Paul ion trap;rf only mode;impact electron ionization technique;buffer gas cooling ions;
 Language
English
 Cited by
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