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Système à aimant supraconducteur de très haute stabilité pour un spectromètre de masse à piège de Penning.

Ultrastable superconducting magnet system for a penning trap mass spectrometer.

Auteurs : DYCK R. S. van Jr, FARNHAM D. L., ZAFONTE S. L., et al.

Type d'article : Article

Résumé

A custom-designed magnet/cryostat system is described which has demonstrated remarkably improved field stability over previous designs. To shield external magnetic noise, a custom-fabricated flux-gate device remotely senses the changes in magnetic field and cancels them out at the site of the magnet/cryostat via a 1.7 m-diam Helmholtz coil. To provide further shielding, the basic superconducting solenoid includes a passive flux-stabilizing coil. To stabilize internal field shifts, the temperature of the materials in the immediate vicinity of the solenoid (which have a temperature-dependent susceptibility) is stabilized via the new cryostat geometry and by controlling the pressure of the evaporating liquid helium to a few parts per million.

Détails

  • Titre original : Ultrastable superconducting magnet system for a penning trap mass spectrometer.
  • Identifiant de la fiche : 2000-2370
  • Langues : Anglais
  • Source : Rev. sci. Instrum. - vol. 70 - n. 3
  • Date d'édition : 03/1999
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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