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The Dynamic Compression Sector laser: A 100-J UV laser for dynamic compression research.

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The Dynamic Compression Sector (DCS) laser is a powerful new tool for studying materials under extreme pressures. This 100-J ultraviolet laser system enables advanced research in high-energy-density physics.

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Area of Science:

  • High-energy-density physics
  • Materials science under extreme conditions
  • Pulsed laser systems

Background:

  • The Dynamic Compression Sector (DCS) laser facility at Argonne National Laboratory's Advanced Photon Source is crucial for materials research.
  • Understanding material behavior under extreme dynamic pressures requires specialized experimental tools.

Purpose of the Study:

  • To introduce the 100-J ultraviolet Nd:glass Dynamic Compression Sector (DCS) laser system.
  • To detail the laser's design and capabilities for generating shock pressures in materials.
  • To highlight its role in advanced materials research.

Main Methods:

  • The DCS laser system utilizes a Nd:glass amplifier chain, including regenerative, rod, and disk amplifiers.
  • Frequency tripling converts the 1053 nm output to 351 nm using KDP crystals.
  • Advanced optics, including a distributed phase plate and aspherical lens, shape the beam to a super-Gaussian profile.
  • Beam smoothing techniques, such as spectral dispersion and polarization smoothing, achieve high uniformity.

Main Results:

  • The laser system is designed to deposit 100 J of energy onto a target.
  • Adjustable spot sizes of 250, 500, and 1000 μm are achievable.
  • The system achieved a root-mean-square intensity variation on target of ±8.7% through advanced beam smoothing.

Conclusions:

  • The DCS laser is a significant advancement for studying dynamic material properties.
  • Its capabilities support a wide range of high-pressure research experiments.
  • The system's design principles are informed by larger-scale laser facilities like OMEGA and NIF.