By the same authors

From the same journal

Characterization of flowing liquid films as a regenerating plasma mirror for high repetition-rate laser contrast enhancement

Research output: Contribution to journalArticlepeer-review

Author(s)

  • C. I.D. Underwood
  • G. Gan
  • Z. H. He
  • C. D. Murphy
  • A. G.R. Thomas
  • K. Krushelnick
  • J. Nees

Department/unit(s)

Publication details

JournalLaser and Particle Beams
DateAccepted/In press - 19 Mar 2020
DateE-pub ahead of print (current) - 18 May 2020
Issue number2
Volume38
Pages (from-to)128-134
Early online date18/05/20
Original languageEnglish

Abstract

In this paper, we characterize a high repetition-rate regenerating plasma mirror produced by the thin film of liquid formed when two laminar streams collide. The use of a flowing liquid film is inexpensive and the interaction surface refreshes automatically, avoiding buildup of on-target debris. The composition of the liquid material and the relative angle of the film-generating nozzles was optimized for this application. Spectra measured in reflection from a water-based plasma mirror showed a blue shift but an optical reflectivity of up to 30%. The thickness of the film was found to be of the order of 2 m, and the stability of the reflected spot was mrad. The reflected beam profile was highly distorted but stable. Further optimization of the nozzles to affect the fluid flow should enable significant improvements in control of the fluid films and increase in the reflectivity of these mirrors.

Bibliographical note

© The Author(s), 2020

    Research areas

  • High repetition rate, laser contrast enhancement, plasma mirror, self healing optics

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