Paul trap for pure positron plasma – A prelude to electron–positron plasma in a laboratory

Bajpai, Manu; Lachhvani, Lavkesh; Saxena, Y. C.

doi:10.1002/pssc.200982052

Cited by 1 publication

(1 citation statement)

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“…[5][6][7][8] As we deal with the confinement of a non-neutral plasma in a Paul ion trap, buffere gas cooling becomes significant. 9 Theoratically, the damping force F is assumed to be proportional to the velocity ν of the confined ion such as F = -mγν, where m denotes the ion mass, and γ depends on the mobility of particular gas and has unit of s -1 . In generall, for non-energetic confined ion (up to few eV) the mobility is approximetly constant.…”

Section: Introductionmentioning

confidence: 99%

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

Kiai¹,

Elahi²,

Adlparvar³

et al. 2015

Mass Spectrometry Letters

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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)

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Section: Introductionmentioning

confidence: 99%