Heating rate in a linear quadrupole trap

2023/12/01 by Adrien Poindron, Poindron, Adrien, J. Pedregosa-Gutierrez +3
Chemistry · Physics and Astronomy · #Mass Spectrometry Techniques and Applications #Cold Atom Physics and Bose-Einstein Condensates

paper · pdf · doi:10.48550/arxiv.2312.00683

Abstract

In radio-frequency trap, the temperature of ion ensembles converges towards a hot equilibrium due to radio-frequency heating. This effect is detrimental to the stability of trapped ensembles and is the justification of cooling. The intensity of this radio-frequency heating increases with the amplitude of the radio-frequency field q_x. Using an analytical empirical formula, we show that the lifetime of the ion ensemble t₀ under cold condition increases with q_x according to a power law t₀∝ q_x^A, and does not vary significantly for the several ion quantities N tested. The temperature of the explosive onset B decreases linearly with q_x. We also show that non-linear instabilities due to trapping parameters decreases t₀ and B, and produce a local increase of heating rate for certain temperature ranges.

Related

• Collisional activation of ions in RF ion traps and ion guides: The effective ion temperature treatment
• Ground state sideband cooling of an ion in a room temperature trap with a sub-Hertz heating rate
• Buffer gas cooling of ions in radio-frequency traps using ultracold atoms
• Temperature ratio dependence of ion temperature gradient and trapped electron mode instability thresholds
• Theory of trapped-ion-temperature-gradient-driven turbulence and transport in low-collisionality plasmas