Manipulating hydrogen atoms using permanent magnets: Characterisation of a velocity-filtering guide

Toscano, Jutta; Hejduk, Michal; McGhee, H.; Heazlewood, Brianna R.

doi:10.1063/1.5078573

Cited by 6 publications

(3 citation statements)

References 16 publications

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“…The magnetic guide has been described in detail elsewhere 35,36 with the key features presented here. The MRF is composed of four hexapole magnets arranged in a Halbach array configuration, along with two skimming blades (see Figure 1).…”

Section: Methodsmentioning

confidence: 99%

A stand-alone magnetic guide for producing tuneable radical beams

Miossec

Bertier

et al. 2020

The Journal of Chemical Physics

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Radicals are prevalent in gas-phase environments such as the atmosphere, combustion systems and the interstellar medium. To understand the properties of the processes occurring in these environments, it is helpful to study radical reaction systems in isolation-thereby avoiding competing reactions from impurities. There are very few methods for generating a pure beam of gas-phase radicals, and those that do exist involve complex setups. Here, we provide a straightforward and versatile solution. A magnetic radical filter (MRF), composed of four Halbach arrays and two skimming blades, can generate a beam of velocityselected low-field-seeking hydrogen atoms. As there is no line-of-sight through the device, all species that are unaffected by the magnetic fields are physically blocked; only the target radicals are successfully guided around the skimming blades. The positions of the arrays and blades can be adjusted, enabling the velocity distribution of the beam (and even the target radical species) to be modified. The MRF is employed as a stand-alone devicefiltering radicals directly from the source. Our findings open up the prospect of studying a range of radical reaction systems with a high degree of control over the properties of the radical reactants.

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Section: Methodsmentioning

confidence: 99%

A stand-alone magnetic guide for producing tuneable radical beams

Miossec

Bertier

et al. 2020

The Journal of Chemical Physics

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“…The reaction intermediate for the N + 2 + H charge exchange process, N 2 H + , was one of the first ions to be detected in the ISM [79,80], nitrogen is the most abundant molecule in our atmosphere and is present in the ISM, and atomic hydrogen is the most abundant species in the universe. A newly introduced radical source [81,82] -where a series of Halbach arrays and blades filter the output of a Zeeman decelerator [83] to generate a pure beam of H atoms -is in the process of being combined with an ion trap. This will facilitate the first precise study of important reaction systems such as N + 2 + H, providing crucial data for inclusion in models of the chemistry of complex gas-phase environments.…”

Section: Ongoing Challenges and Outlookmentioning

confidence: 99%

Cold ion chemistry within Coulomb crystals

Heazlewood

2019

Molecular Physics

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Coulomb crystals are ordered structures of spatially-localised ions, held within an ion trap and exhibiting very low translational temperatures. The many advantages of studying the spectroscopic, kinetic and dynamic properties of gas phase ions in Coulomb crystals -such as the ability to manipulate and detect single ions under ultrahigh vacuum conditions -have seen their adoption in an ever-expanding range of fields. This article provides an overview of recent developments, where Coulomb crystals have been utilised for precision measurements, for the study of controlled ion-neutral reactions and in the implementation of quantum information science. ARTICLE HISTORY

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“…Since the preparation of the first cold gaseous molecular sample 9 , there has been an explosion of technical development in producing cold and dense molecules. A variety of methods for cooling and manipulating molecules have been established, including buffer gas cooling 10,11 , velocity filtering [12][13][14] , rotational methods (pulsed 15 and quasicontinuous 16 ), Stark/Zeeman/Rydberg/Optical deceleration [17][18][19][20] , laser cooling 21,22 , evaporative cooling 23 , synthetic methods 24,25 , and so on. These methods allow preparing molecular samples into the temperature ranging from cold (< 1 K) to ultracold (< 1 mK), even to quantum degeneracy domain, and give accesses to complete control over all degrees of freedom of the molecule 26 .…”

Section: Introductionmentioning

confidence: 99%

Ring-shaped traveling wave Zeeman decelerator for both light and heavy molecules

Ji¹,

Liu²,

Liu³

et al. 2023

Preprint

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Taming more species of molecules with large density is a long-standing goal in molecular science. Heavy molecule (> 100 amu) is of particular interest for precision measurements. However, decelerating a fast-moving beam of heavy molecules to rest remains challenging for Zeeman deceleration. Additionally, the traditional approach of pulsed Zeeman decelerator suffers from serious molecular loss during deceleration, significantly limiting its potential applications. Herein, we present a ring-shaped traveling wave Zeeman decelerator (RTWZD) featured with true three-dimensional smoothly-moving magnetic potential wells that directly solve the above intractable problems. With this approach, not only the density of the molecule can be greatly increased but also the range of molecular species for Zeeman deceleration can be extended from light to heavy. The performance of the RTWZD is characterized with both the theoretical analysis and the numerical calculation, where a group of atoms and molecules such as 7Li, 32O2, 88Sr19F and 174Yb19F are employed as testers. Losses in the traditional Zeeman decelerator can be avoided, yielding more than two orders of magnitude improvement in molecular density. These characteristics of the RTWZD make it an ideal toolbox to produce cold and dense atomic/molecular samples, enabling promising prospects for cold collision, sympathetic cooling, and precision measurement.

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Manipulating hydrogen atoms using permanent magnets: Characterisation of a velocity-filtering guide

Abstract: Super-resolution imaging and field of view extension using a single camera with Risley prisms Review of Scientific Instruments 90, 033701 (2019);

Cited by 6 publications

References 16 publications

A stand-alone magnetic guide for producing tuneable radical beams

A stand-alone magnetic guide for producing tuneable radical beams

Cold ion chemistry within Coulomb crystals

Ring-shaped traveling wave Zeeman decelerator for both light and heavy molecules

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