Verfahren und Struktur zur Steuerung von Magnetfeldverteilungen in einem ExB-Wien-Filter

Details

Veröffentlichungs-Nr.

EP2525384

Aktenzeichen

EP12167972

Anmeldetag

15. Mai 2012

Veröffentlichung

1. Februar 2017

Erteilung

1. Februar 2017

Rechtsraum

EP

IPC

H01J37/05H01J37/15H01J49/28

Abstract

An ExB Wien mass filter (700) providing a method and structure for mechanically adjusting the magnetic field distributions at the mass filter entrance and exit end caps (722 and 726, respectively). The reluctance of the flux return path may be modified by configuring pluralities of magnetic shims (790, 796) within slots (750, 756) at the outer diameters of the entrance and exit end caps, and also by configuring pluralities of magnetic plug shims (906) within circular flux dams (902) surrounding the entrance and exit apertures (724 and 728, respectively). Advantages of purely mechanical adjustment for the magnetic fields of the present invention, compared with prior art electromagnet adjustment methods include greater reliability, simplicity, lower cost, and lack of power dissipation. The invention may employ either permanent magnets or electromagnets for generation of the mass-separation magnetic field.

Anmelder

Firma

FEI Company

Land

🇺🇸 USA

Fachgebiete