Accession Number : ADA261316


Title :   Magnetic Field Source for Bi-Chambered Electron Beam Devices


Descriptive Note : Technical rept.


Corporate Author : ARMY RESEARCH LAB FORT MONMOUTH NJ


Personal Author(s) : Tilak, Anup S ; Basarab, Douglas J ; Leupold, Herbert A ; Potenziani, II, Ernest


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a261316.pdf


Report Date : Nov 1992


Pagination or Media Count : 22


Abstract : Certain gyro-type electron beam devices require two tandem coaxial chambers with different uniform axial magnetic fields in their interiors. Therefore, there is a step in the field profile in the vicinity of the junction of the two chambers, which are sometimes of different diameter as well. Ah electric solenoid is usually employed to furnish such a field but the sources are bulky, cumbersome, and consumptive of energy, and provide only rough approximations to the ideal field profile. This report describes a permanent magnet field source that was designed to provide a constant axial field of 2 kOe in the larger of the two chambers and 0.5 kOe in the smaller. The basic field is provided by two tandem permanent magnet solenoids. The rather broad transition between the field values in the two chambers is considerably narrowed (approximately 50 percent) by the placement of a radially magnetized ring internal to the junction of the two solenoids. The field profile can be made to conform to that specified to within a few percent by addition of two axially magnetized rings.


Descriptors :   *MAGNETIC FIELDS , *ELECTRON BEAMS , *SOLENOIDS , DIAMETERS , RINGS , CLADDING , GYROTRONS , PERMANENT MAGNETS , JUNCTIONS , VALUE , ELECTRONS


Subject Categories : Electrical and Electronic Equipment
      Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE