Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A cavity whose walls are in thermodynamic equilibrium with the radiation emitted by the cavity

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Borrowing from German Hohlraum ("hollow area").

Examples

  • "What we would like to do is take the laser and shine the laser onto what we call a hohlraum,

    Media Newswire

  • A tiny chamber made of gold, called a hohlraum, is used to contain the pellet of heavy hydrogen fuel at the center of a fusion reaction at the National Ignition Facility.

    PhysOrg.com - latest science and technology news stories

  • The target will be held inside a tiny gold cylinder called a hohlraum, about the size of a pencil eraser.

    SFGate: Top News Stories

  • Inside the hohlraum is a tiny pellet containing an extremely cold, solid mixture of hydrogen isotopes

    BBC News | News Front Page | World Edition

  • In inertial confinement fusion (ICF) experiments, the energy of 192 powerful laser beams is fired into a small cylinder called a hohlraum, which contains a tiny spherical target filled with deuterium and tritium, two isotopes of hydrogen.

    TG Daily

  • The historic level of laser energy delivered is about 30 times the energy delivered by any other group of lasers in the world and was achieved by focusing the energy of 192 powerful laser beams into a pencil-eraser-sized cylinder containing a tiny spherical target called a hohlraum (pictured below).

    Gizmag Emerging Technology Magazine

  • This was done by encasing it in a gold cylinder called a hohlraum, pierced by holes through which the laser beams were shone.

    The Independent - Frontpage RSS Feed

  • These good news were reported in a Glenzer et al.: Symmetric Inertial Confinement Fusion Implosions at Ultra-High Laser Energies Deuterium-tritium capsules (gold-plated hollow cylinders called "hohlraum" for "hollow area" in German) may be compressed and implode.

    The Reference Frame

  • To do that, in these experiments at the Laboratory for Laser Energetics in Rochester, a second capsule was placed nearby and hit by another set of laser beams, producing a flash of protons to illuminate the first capsule, inside a hohlraum.

    PhysOrg.com - latest science and technology news stories

  • In order for the ignition to work, the capsule of deuterium and tritium - two heavy forms of the element hydrogen - must be nearly perfectly spherical, nearly perfectly placed at the center of the hohlraum cavity, and must implode in a nearly perfectly symmetrical way.

    PhysOrg.com - latest science and technology news stories

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.