Dynamics of colliding aluminium plasmas produced by laser ablation

Gambino, N.; Hayden, P.; Costello, J. T.; Fallon, C.; Hough, P.; Yeates, P.D.; Anzalone, A.; Musumeci, F.; Tudisco, S.

doi:10.1016/j.apsusc.2012.03.119

Cited by 22 publications

(7 citation statements)

References 11 publications

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“…This pressure region has been observed in recent laser ablation experiments [23]- [25], where a stagnation region was observed to form between two pulsed plasma jets, lasting for much longer than the jet pulse themselves. This higher pressure region of plasma in front of the cathode may serve to enhance the gas-dynamic acceleration of the plasma.…”

Section: Thrust Resultsmentioning

confidence: 77%

Influence of Cathode Shape on Vacuum Arc Thruster Performance and Operation

Lun

Law

2015

IEEE Trans. Plasma Sci.

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Vacuum arc thrusters (VATs) are a potentially useful technology for use as microthrusters, given their simplicity, low mass, and low-power requirements. However, further development is still needed to improve and mature their performance and operation. In an effort to improve thruster characteristics, we investigate the use of conically shaped convergent cathode surface profiles in a low-power coaxial VAT design. Experimental measurements of ion current density distribution, thrust, and erosion rate were taken for a range of cathode profiles and materials. Results show that modifying the profile of the cathode face can affect the plasma jet's plume distribution and even improve thrust production in certain cases. One likely cause of the thrust improvement is speculated to be increased charge exchange collisions resulting in a lower average ion charge state of the ejecting plasma.Index Terms-Cathode, diagnostics, ion charge state, ion current density distribution (ICDD), microthruster, plasma jet, propulsion, pulsed power, thrust stand, vacuum arc thruster (VAT).

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Section: Thrust Resultsmentioning

confidence: 77%

Influence of Cathode Shape on Vacuum Arc Thruster Performance and Operation

Lun

Law

2015

IEEE Trans. Plasma Sci.

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“…More complex phenomena occur in the interaction of two laser-induced plumes (and related shock waves). These effects have been studied in a number of papers, for example, by Hough and coworkers [28][29][30][31].…”

Section: Shock Wave and Plasmasmentioning

confidence: 99%

Shock Waves in Laser-Induced Plasmas

Campanella

Legnaioli

Pagnotta

et al. 2019

Atoms

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The production of a plasma by a pulsed laser beam in solids, liquids or gas is often associated with the generation of a strong shock wave, which can be studied and interpreted in the framework of the theory of strong explosion. In this review, we will briefly present a theoretical interpretation of the physical mechanisms of laser-generated shock waves. After that, we will discuss how the study of the dynamics of the laser-induced shock wave can be used for obtaining useful information about the laser-target interaction (for example, the energy delivered by the laser on the target material) or on the physical properties of the target itself (hardness). Finally, we will focus the discussion on how the laser-induced shock wave can be exploited in analytical applications of Laser-Induced Plasmas as, for example, in Double-Pulse Laser-Induced Breakdown Spectroscopy experiments.

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“…In laser ablation, only the process related to the shielding effect caused by laser adsorption (i.e., isothermal expansion) was studied. The plasma expansion size (i.e., H) can be obtained from the plasma kinetic equation of the isothermal expansion [16,17]:…”

Section: The Plasma Shielding Effectmentioning

confidence: 99%