Electron Beam Action and High Charging of Dust Particles

Kopnin, S. I.; Morozova, T. I.; Popel, S. I.

doi:10.1109/tps.2017.2748378

Cited by 7 publications

(5 citation statements)

References 12 publications

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“…Charging can be achieved via electron or ion bombardment [53][54][55], corona discharge [56] and adhesion of charged droplets. Not much is known about the charging limits for sub-micron particles, but it has been noted that, for smaller particles, secondary emission of charge from the bulk material can limit the maximum surface potential [55,57].…”

Section: Inclusion Of Noisementioning

confidence: 99%

“…Charging can be achieved via electron or ion bombardment [54][55][56], corona discharge [57] and adhesion of charged droplets. Not much is known about the charging limits for sub-micron particles, but it has been noted that, for smaller particles, secondary emission of charge from the bulk material can limit the maximum surface potential [56,58]. Smaller spheres require higher electric fields to charge, as determined by the Pauthenier equation [57], which says that in a uniform electric field E, the maximum charge held by a sphere is for a dielectric.…”

Section: Appendix B Charging the Particlesmentioning

confidence: 99%

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Levitated electromechanics: all-electrical cooling of charged nano- and micro-particles

Goldwater

Stickler

Martinetz

et al. 2019

Quantum Sci. Technol.

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We show how charged levitated nano-and micro-particles can be cooled by interfacing them with an RLC circuit. All-electrical levitation and cooling is applicable to a wide range of particle sizes and materials, and will enable state-ofthe-art force sensing within an electrically networked system. Exploring the cooling limits in the presence of realistic noise we find that the quantum regime of particle motion can be reached in cryogenic environments both for passive resistive cooling and for an active feedback scheme, paving the way to levitated quantum electromechanics. arXiv:1802.05928v3 [quant-ph]

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Section: Inclusion Of Noisementioning

confidence: 99%

Section: Appendix B Charging the Particlesmentioning

confidence: 99%

Levitated electromechanics: all-electrical cooling of charged nano- and micro-particles

Goldwater

Stickler

Martinetz

et al. 2019

Quantum Sci. Technol.

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“…Usually grain sizes ranging from some nm to several µm are considered in the experiments and theoretical models. Most of these works were focused on generating plasmas for industrial or space applications (Michau et al, 2016;Deka et al, 2017;Kopnin et al, 2018;Yaroshenko et al, 2018;Intra and Yawootti, 2019). However, one of the most recent developments is the application of plasma in aerosol related topics, such as plasma treatment of aerosol particles (Uner and Thimsen, 2017) and, as a novel topic, charging of aerosol particles or ionization of trace gas compounds (Spencer et al, 2015;Yang et al, 2016;Intra and Yawootti, 2019).…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Non-Thermal Plasma Source for the Use as a Mass Spec Calibration Tool and Non-Radioactive Aerosol Charger

Tauber¹,

Schmoll²,

Gruenwald³

et al. 2020

Preprint

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Abstract. In this study the charging efficiency of a radioactive and a non-radioactive plasma neutralizer (Gilbert Mark I plasma charger) have been investigated at various aerosol flow rates. The results were compared to classic theoretical approaches. In addition, the chemical composition and electrical mobilities of the charger ions have been examined using an atmospheric pressure interface – time-of-flight mass spectrometer (APi-TOF MS). A comparison of the different neutralization methods revealed an increased charging efficiency for negatively charged particles using the non-radioactive plasma charger with nitrogen as working gas. The mobility and mass spectrometric measurements show that the generated neutralizer ions are of the same mobilities and composition independent of the charging mechanism. It was the first time that the Gilbert Mark I plasma charger was characterized in comparison to the standard TSI X-Ray (TSI Inc, Model 3088) and a radioactive americium neutralizer. We observed that the plasma charger with nitrogen as working gas can enhance the charging probability for sub-10 nm particles. Consequently, the limit of detection of differential or scanning mobility particle sizers can be increased down towards to smaller sizes with the Gilbert Mark I plasma charger.

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“…laser and magnetic field 22 . In all of these cases the complex dynamics of the dust particles within the crystal leads to the observation of interesting physical phenomena such as the dust acoustic or the longitudinal dust lattice waves 23 , solid to liquid phase transitions 5,17,24 , shear induced dust flows 16 , secondary emission 25 , field emission 26 , hypercharging of the dust particles 18,19,27 , dust vortices 20 , and rotation of the dust structure [28][29][30] .…”

mentioning

confidence: 99%

A laboratory platform for studying rotational dust flows in a plasma crystal irradiated by a 10 keV electron beam

Ticoş

Constantin

Mitu

et al. 2023

Sci Rep

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A novel laboratory platform has been designed and built for the irradiation of a plasma crystal (PC) with an electron beam (e-beam) having an energy around 10 keV and a current of tens of milliamperes. The pulsed e-beam collimated to a few millimeter-size spot is aimed at a crystal made of dust particles levitated in a radio-frequency (RF) plasma. The platform consists of three vacuum chambers connected in-line, each with different utility: one for generating free electrons in a pulsed hollow-anode Penning discharge, another for the extraction and acceleration of electrons at $$\sim 10$$ ∼ 10 kV and for focusing the e-beam in the magnetic field of a pair of circular coils, and the last one for producing PCs above a RF-driven electrode. The main challenge is to obtain both a stable e-beam and PC by insuring appropriate gas pressures, given that the e-beam is formed in high vacuum ($$\lesssim 10^{-4}$$ ≲ 10 - 4 Torr), while the PC is produced at much higher pressures ($$\gtrsim 10^{-1}$$ ≳ 10 - 1 Torr). The main diagnostics include a high speed camera, a Faraday cup and a Langmuir probe. Two applications concerned with the creation of a pair of dust flow vortices and the rotation of a PC by the drag force of the e-beam acting on the strongly coupled dust particles are presented. The dust flow can become turbulent as demonstrated by the energy spectrum, featuring vortices at different space scales.

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Electron Beam Action and High Charging of Dust Particles

Cited by 7 publications

References 12 publications

Levitated electromechanics: all-electrical cooling of charged nano- and micro-particles

Levitated electromechanics: all-electrical cooling of charged nano- and micro-particles

Characterization of a Non-Thermal Plasma Source for the Use as a Mass Spec Calibration Tool and Non-Radioactive Aerosol Charger

A laboratory platform for studying rotational dust flows in a plasma crystal irradiated by a 10 keV electron beam

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