An optically-heated atomic source for compact ion trap vacuum systems
Shaobo Gao (1), William Hughes (1), David M. Lucas (1), Timothy G., Ballance (2), Joseph F. Goodwin (1) ((1) Department of Physics, University, of Oxford, Clarendon Laboratory, Parks Rd, Oxford, OX1 3PU, UK, (2), ColdQuanta UK, Oxford Centre for Innovation, Oxford, OX1 1BY, UK)
TL;DR
This paper introduces an optically-heated atomic source for ion trap systems, offering efficient calcium loading with rapid startup and minimal thermal disturbance, using a diode laser for heating instead of electrical connections.
Contribution
It presents a novel optical heating design for atomic ovens in ion traps, enabling better thermal isolation and long-term operation without replenishment.
Findings
Achieved calcium vapor density suitable for ion loading with ~200 mW laser power.
Turn-on time for the oven is less than 20 seconds.
Oven can operate continuously for thousands of years without replenishment.
Abstract
We present a design for an atomic oven suitable for loading ion traps, which is operated via optical heating with a continuous-wave multimode diode laser. The absence of the low-resistance electrical connections necessary for Joule heating allows the oven to be extremely well thermally isolated from the rest of the vacuum system, and for an oven filled with calcium we achieve a number density suitable for rapid ion loading in the target region with ~200 mW of laser power, limited by radiative losses. With simple feedforward to the laser power, the turn-on time for the oven is less than 20 s, while the oven contains enough calcium to operate continuously for many thousands of years without replenishment.
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