M-Labs/Artiq: 4.0

Bourdeauducq, Sébastien; whitequark,; Jördens, Robert; Sionneau, Yann; enjoy-digital,; cjbe,; Nadlinger, D. P.; hartytp,; JBoulder,; Slichter, Daniel; Drew,; mntng,; r-srinivas,; apatura-iris,; Mackenzie, Stewart; Smith, Z.; Paweł, K; Weber, Marius; kemstevens,; Held, Felix; Leibrandt, David R.

doi:10.5281/zenodo.1492176

Cited by 8 publications

(23 citation statements)

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“…The experiment is controlled by a Kasli FPGA and programmed using ARTIQ (Advanced Real-Time Infrastructure for Quantum physics) [32,33] provided by mlabs. A typical experimental sequence to measure 39 K-40 Ca + charge exchange is shown in Fig.…”

Section: Experimental Setup and Observationsmentioning

confidence: 99%

Photon-mediated charge-exchange reactions between 39K atoms and 40Ca+ ions in a hybrid trap

Li,

Jyothi,

et al. 2020

Preprint

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We present experimental evidence of charge exchange between laser-cooled potassium 39 K atoms and calcium 40 Ca + ions in a hybrid atom-ion trap and give quantitative theoretical explanations for the observations. The 39 K atoms and 40 Ca + ions are held in a magneto-optical (MOT) and a linear Paul trap, respectively. Fluorescence detection and high resolution time of flight mass spectra for both species are used to determine the remaining number of 40 Ca + ions, the increasing number of 39 K + ions, and 39 K number density as functions of time. Simultaneous trap operation is guaranteed by alternating periods of MOT and 40 Ca + cooling lights, thus avoiding direct ionization of 39 K by the 40 Ca + cooling light. We show that the K-Ca + charge-exchange rate coefficient increases linearly from zero with 39 K number density and, surprisingly, the fraction of 40 Ca + ions in the 4p 2 P 1/2 electronically-excited state. Combined with our theoretical analysis, we conclude that these data can only be explained by a process that starts with a potassium atom in its electronic ground state and a calcium ion in its excited 4p 2 P 1/2 state producing ground-state 39 K + ions and metastable, neutral Ca (3d4p 3 P1) atoms, releasing only 150 cm −1 equivalent relative kinetic energy. Chargeexchange between either ground-or excited-state 39 K and ground-state 40 Ca + is negligibly small as no energetically-favorable product states are available. Our experimental and theoretical rate coefficients are in agreement given the uncertainty budgets.

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Section: Experimental Setup and Observationsmentioning

confidence: 99%

Photon-mediated charge-exchange reactions between 39K atoms and 40Ca+ ions in a hybrid trap

Li,

Jyothi,

et al. 2020

Preprint

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show abstract

“…For the simultaneous cooling and trapping of 39 K and 40 Ca + , the 767 nm laser beams for 39 K and the 397 nm cooling beam for 40 Ca + need to be alternately switched at high frequency. This is because the ionization energy of the potassium atoms from the 4 P 3/2 excited state is only 2.7 eV and any light with wavelength lower than 455 nm can ionize the excited state 39 K atoms (the relevant energy levels for 39 K and 40 Ca + are shown in Fig. 1 (b)).…”

Section: Experimental Designmentioning

confidence: 99%

“…1 (b)). Hence, while the MOT is operational, the 767 nm and 397 nm lasers are alternately switched at 2 kHz and the 423 nm and 379 nm lasers are blocked using a mechanical shutter to avoid ionization of excited state 39 K atoms. Hence in all experiments, we first load the 40 Ca + ions, block the 423 nm and 379 nm laser beams, start alternate switching of the 767 nm and 397 nm laser beams using AOMs and start loading the 39 K MOT.…”

Section: Experimental Designmentioning

confidence: 99%

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A hybrid ion-atom trap with integrated high resolution mass spectrometer

Jyothi

Egodapitiya

Bondurant

et al. 2019

Review of Scientific Instruments

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In this article we describe the design, construction and implementation of our ion-atom hybrid system incorporating a high resolution time of flight mass spectrometer (TOFMS). Potassium atoms ( 39 K) in a Magneto Optical Trap (MOT) and laser cooled calcium ions ( 40 Ca + ) in a linear Paul trap are spatially overlapped and the combined trap is integrated with a TOFMS for radial extraction and detection of reaction products. We also present some experimental results showing interactions between 39 K + and 39 K, 40 Ca + and 39 K + as well as 40 Ca + and 39 K pairs. Finally, we discuss prospects for cooling CaH + molecular ions in the hybrid ion-atom system.

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“…A similar advance has occurred in field programmable gate array (FPGA)-based hardware and has been followed by the development of FPGA-based control systems for atomic physics experiments [26,27]. Additional advances in control systems [28] have allowed for the automation of experimental feedback [29], optimised control of complex sequences [30] and even citizen-science participation [31,32].…”

mentioning

confidence: 92%

An Environmental Monitoring Network for Quantum Gas Experiments and Devices

Barrett¹,

Evans²,

Gadge³

et al. 2021

Preprint

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The field of quantum technology is approaching a level of maturity, recently demonstrated in space-borne experiments and in-field measurements, which would allow for adoption by non-specialist users. Parallel advancements made in microprocessor-based electronics and database software can be combined to create robust, versatile and modular experimental monitoring systems. Here, we describe a monitoring network used across a number of cold atom laboratories with a shared laser system. The ability to diagnose malfunction, unexpected or unintended behaviour and passively collect data for key experimental parameters, such as vacuum chamber pressure, laser beam power, or resistances of important conductors, significantly reduces debugging time. This allows for efficient control over a number of experiments and remote control when access is limited.

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M-Labs/Artiq: 4.0

Cited by 8 publications

References 0 publications

Photon-mediated charge-exchange reactions between 39K atoms and 40Ca+ ions in a hybrid trap

Photon-mediated charge-exchange reactions between 39K atoms and 40Ca+ ions in a hybrid trap

A hybrid ion-atom trap with integrated high resolution mass spectrometer

An Environmental Monitoring Network for Quantum Gas Experiments and Devices

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