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Ultrafast collisional ion heating by electrostatic shocks.

A E Turrell1, M Sherlock1, S J Rose1,2

  • 1Blackett Laboratory, Imperial College London, Prince Consort Road, South Kensington, London SW7 2AZ, UK.

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|November 14, 2015
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Collisionless electrostatic shocks can rapidly heat ions in solid matter to keV temperatures within femtoseconds. This novel ion-driven mechanism bypasses electron involvement for ultrafast matter heating.

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Area of Science:

  • Plasma physics
  • Laser-driven shocks
  • Materials science

Background:

  • High-intensity lasers generate shockwaves for applications like nuclear fusion and cancer therapy.
  • Collisionless electrostatic shocks are crucial for ion acceleration studies.

Purpose of the Study:

  • To introduce a novel mechanism for ultrafast matter heating using collisionless electrostatic shocks.
  • To investigate the role of ions in the heating process, excluding electrons.

Main Methods:

  • Utilizing high-intensity lasers to create collisionless electrostatic shocks.
  • Employing computational simulations to model the interaction of shocks with solid density matter.

Main Results:

  • Demonstrated a new mechanism heating matter to ~keV temperatures in tens of femtoseconds.
  • Identified ions, not electrons, as the primary drivers of the rapid heating rate.
  • Observed heating driven by shock electric fields, density increases, and ion-ion collisions.

Conclusions:

  • This ion-dominated heating mechanism offers one of the fastest methods for localized matter heating.
  • Potential for significant advancements in laboratory experiments if experimentally verified.