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A Microfluidic-based Hydrodynamic Trap for Single Particles
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Hydrodynamic optical-field-ionized plasma channels.

R J Shalloo1, C Arran1, L Corner1

  • 1John Adams Institute for Accelerator Science and Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom.

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Summary
This summary is machine-generated.

Researchers created long, low-density plasma channels using optical field ionization. These channels are efficient for multi-GeV laser-plasma accelerator stages, requiring minimal laser energy for generation.

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Area of Science:

  • Plasma Physics
  • Laser-Plasma Interactions
  • Accelerator Technology

Background:

  • Optical field ionization (OFI) is a key technique for generating plasma.
  • Plasma channels are crucial for laser-plasma accelerators.

Purpose of the Study:

  • To demonstrate the formation of fully ionized, low-density plasma channels.
  • To assess their suitability for laser-plasma accelerator stages.

Main Methods:

  • Numerical simulations of plasma column hydrodynamic expansion.
  • Experimental verification using laser-produced plasma channels.

Main Results:

  • Generated 200 mm long plasma channels with electron densities of ~1x10^17 cm^-3.
  • Achieved spot sizes of ~40 μm with modest laser energy requirements (~1 mJ/cm).
  • Experimental results confirmed simulated channel parameters.

Conclusions:

  • Low-density plasma channels are effectively formed via OFI and hydrodynamic expansion.
  • These channels are promising for multi-GeV laser-plasma accelerator stages.
  • Potential for long-term operation at high pulse repetition rates.