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PRE-HACHEUR [1 record]

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Record 1 2011-01-28

English

Subject field(s)
  • Scientific Instruments
  • Atomic Physics
CONT

A pulsed low-energy positron system for positron-lifetime spectroscopy has been up-graded and modified with regard to its three main components. A new moderator preparation chamber has been added, the radiofrequency pulsing concept has been modified using a pre-buncher and a pre-chopper in front of the existing chopper-buncher section.

Key term(s)
  • prechopper

French

Domaine(s)
  • Instruments scientifiques
  • Physique atomique
OBS

[Implanteur de positons «lents» monoénergétiques.] En 2001, le faisceau le plus performant (situé à Munich) a une résolution en temps d’environ 200 ps [picosecondes]. Les positons modérés par une feuille de tungstène sont regroupés en paquets grâce à une succession d’accélérations appliquées dans une série d’étages électrostatiques [pré-groupeur, pré-hacheur et hacheur et groupeur].

Key term(s)
  • préhacheur

Spanish

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