Real-time interferometric diagnostics of rubidium plasma

Djotyan, G. P.; Bakos, J. S.; Kedves, M. Á.; Ráczkevi, B.; Dzsotjan, D.; Varga-Umbrich, Károly; Sörlei, Zs.; Szigeti, J.; Ignácz, P. N.; Lévai, P.; Czitrovszky, A.; Nagy, Attila; Dombi, Péter; Rácz, Péter

doi:10.1016/j.nima.2017.12.004

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…The development of atom trapping and cooling processes [1] has made it possible for researchers to photoexcite cold plasmas in the laboratory [2][3][4][5]. This enables models that scale to hard-to-access plasmas that occur, for instance, in astrophysical environments (insides of stars and gas planets) [6], magnetic-confinement fusion [7,8], and inertial-confinement fusion [9,10]. Recent work in cold plasma physics has explored plasma laser cooling [11], pair correlations [12][13][14][15], dual-species ion collisions [16,17], Rydberg atom-plasma interactions [18], plasma field-sensing applications [19][20][21], and quenched randomness and localization [22].…”

Section: Introductionmentioning

confidence: 99%

Coulomb Expansion of Cold Non-Neutral Rubidium Plasma

Viray¹,

Miller²,

Raithel³

2020

Preprint

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We study the expansion of a cold, non-neutral ion plasma into the vacuum. The plasma is made from cold rubidium atoms in a magneto-optical trap (MOT) and is formed via ultraviolet photoionization. We employ time-delayed plasma extraction and imaging onto a position-and time-sensitive micro-channel plate detector to analyze the plasma. We report on the formation and persistence of plasma shock shells, pair correlations in the plasma, and external-field-induced plasma focusing effects. We also develop trajectory and fluid descriptions to model the data and to gain further insight. The simulations verify the formation of shock shells and correlations, and allow us to model time-and position-dependent density, temperature, and Coulomb coupling parameter, Γ(r, t). This analysis both reaffirms the presence of shock shells and verifies that the experimental plasma is strongly coupled.

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Section: Introductionmentioning

confidence: 99%

Coulomb Expansion of Cold Non-Neutral Rubidium Plasma

Viray¹,

Miller²,

Raithel³

2020

Preprint

View full text Add to dashboard Cite

show abstract

“…The development of atom trapping and cooling processes [1] has made it possible for researchers to photoexcite cold plasmas in the laboratory [2][3][4][5]. This enables models that scale to hard-to-access plasmas that occur, for instance, in astrophysical environments (insides of stars and gas planets) [6], magnetic-confinement fusion [7,8], and inertial-confinement fusion [9,10]. The low temperatures allow experimenters to produce and study strongly coupled plasmas.…”

Section: Introductionmentioning

confidence: 99%

Expansion Dynamics of Cold Non-Neutral Plasma

Viray,

Miller,

Raithel

2019

Preprint

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We study the expansion of a strongly coupled, non-neutral, and cylindrically arranged ion plasma into the vacuum. The plasma is made from cold rubidium atoms in a magneto-optical trap (MOT) and is formed via ultraviolet photoionization. Higher-density and lower-density plasmas are studied to exhibit different aspects indicative of strong coupling. In a higher-density regime, we report on the formation and persistence of plasma shock fronts, as well as external-field-induced plasma focusing effects. In the lower-density regime, conditions are ideal to observe the development and evolution of nearest-neighbor ion correlations, as well as geometry-induced asymmetries in the pair correlation function. Simulated results from a trajectory model and a fluid model are in good agreement with the measurements.

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Laser cleaning and Raman analysis of the contamination on the optical window of a rubidium vapor cell

Gádoros

Czitrovszky

Nagy

et al. 2022

Sci Rep

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In this work, we present the laser cleaning of a Rubidium vapor cell and the Raman analysis of the contaminant material to be removed. The optical window of the vapor cell had gradually lost transparency due to the development of an opaque layer of unknown composition at the inner side during the normal operation of the cell. Laser cleaning was successfully performed by a frequency-doubled Nd:YAG laser focusing the beam inside the cell, avoiding any possible damage to the window. A single laser pulse was enough to clear away the black discoloration at the focal spot and locally restore the transparency of the window. The Raman spectra of the deposit showed peaks not yet described in the literature. Comparison with known Rubidium germanate spectra and simulation results strongly suggested that the unknown material was Rubidium silicate.

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Real-time interferometric diagnostics of rubidium plasma

Cited by 4 publications

References 16 publications

Coulomb Expansion of Cold Non-Neutral Rubidium Plasma

Coulomb Expansion of Cold Non-Neutral Rubidium Plasma

Expansion Dynamics of Cold Non-Neutral Plasma

Laser cleaning and Raman analysis of the contamination on the optical window of a rubidium vapor cell

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