Possibilities for Energy Transport into a Radio-Frequency Quadrupole by a Shifted Supersonic Gas Jet. Part II. Accumulation and Heating of Ions

Abstract

The aim of this work was the assessment of the ability of a supersonic jet to accumulate sufficiently dense ion clouds inside the quadrupole, the ion cloud being “heated” to a relatively high temperature under a relatively low density of the residual gas (pressure lower than 10^–4 Torr). Kinetic measurements gave an estimate of the number of accumulated ions at the beginning of the quadrupole of about 2 × 10⁷ and their internal temperature of 6000 K.