The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 1989
Filed:
Mar. 29, 1988
Volker Stieber, Walnut Creek, CA (US);
Siemens Medical Laboratories, Inc., Walnut Creek, CA (US);
Abstract
An apparatus for generating and transporting a charged particle beam. The apparatus has a source which generates the charged particle beam at two current levels, and a magnet system for bending the beam. Particles of different energies are bent along different paths, whereby at a specific height within the magnet system the radial displacement from the beam axis is a monotone function of the difference between the energy and the nominal energy. At this height there is provided an energy selection filter having at least one bimetallic element. This element projects into the beam and, thus, intercepts beam particles; it is designed such that its interception distance decreases with increasing beam current. As a result, the energy range of particles passing the filter is broader at the higher current level broader than at the lower current level.