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FOCALISATION FAISCEAU [4 records]

Record 1 2010-12-03

English

Subject field(s)
  • Optical Glass
  • Radiological Physics (Theory and Application)
CONT

[A] refractive x-ray optics (lenses that transmit and focus x-rays over a particular energy range) offers an inexpensive and much simpler alternative. Our project investigates using refractive lenses to focus soft x-rays in the few kiloelectronvolt to few tens of kiloelectronvolt energy range. Because the x-ray refraction effect is quite weak in a single lens, a series of elements — a compound refractive lens (CRL) — focuses soft x-rays over practical focal lengths, typically 1 m to 2 m.

Key term(s)
  • C.R.L.

French

Domaine(s)
  • Verres d'optique
  • Physique radiologique et applications
CONT

En optique des rayons X, divers systèmes sont utilisés pour la collimation et la focalisation, tels que miroirs, cristaux courbes et multicouches. Récemment, des lentilles analogues à celles de l'optique visible, appelées CRL(compound refractive lenses) ont été introduites dans le domaine des rayons X. Pour la ligne de faisceau de résonance nucléaire, de telles lentilles servent de collimateurs pour le monochromateur haute résolution jusqu'à une divergence de l'ordre de 1, 5 [microradians]. De plus, les CRL, cristaux courbes et multicouches, peuvent être utilisées pour la focalisation.

Key term(s)
  • C.R.L.

Spanish

Save record 1

Record 2 2004-10-19

English

Subject field(s)
  • Lasers and Masers
  • Optics

French

Domaine(s)
  • Masers et lasers
  • Optique

Spanish

Save record 2

Record 3 2004-09-02

English

Subject field(s)
  • Advanced Technology Weapons
  • Atomic Physics
DEF

A system which produces a high energy, small diameter beam of either neutral atoms or charged ions to disable the target.

CONT

The characteristic that distinguishes the particle-beam weapon from other directed energy weapons is the form of energy it propagates. While there are several operating concepts for particle-beam weapons, all such devices generate their destructive power by accelerating sufficient quantities of subatomic particles or atoms to velocities near the speed of light and focusing these particles into a very high-energy beam. The total energy within the beam is the aggregate energy of the rapidly moving particles, each particle having kinetic energy due to its own mass and motion.

OBS

particle-beam weapon; PBW: term and abbreviation extracted from the "Disarmament and Peace Keeping" glossary with the permission of the United Nations Office at Geneva.

French

Domaine(s)
  • Armes de haute technicité
  • Physique atomique
DEF

Arme constituée d’une chaîne technologique comprenant une alimentation électrique de puissance, une source intense d’ions ou d’électrons et un accélérateur performant muni d’un système de focalisation du faisceau.

OBS

arme à faisceaux de particules : terme tiré du lexique «Désarmement et Maintien de la Paix» avec l’autorisation de l’Office des Nations Unies à Genève.

Spanish

Save record 3

Record 4 1986-04-30

English

Subject field(s)
  • Lasers and Masers
  • Space Weapons
  • Optics
Key term(s)
  • beam focusing system

French

Domaine(s)
  • Masers et lasers
  • Armes orbitales
  • Optique

Spanish

Save record 4

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