Nonuniform crossed field electron gun for producing a stable electron beam orbit

Abstract

Abstract A NONUNIFORM CROSSED FIELD ELECTRON GUN HAS A LONG THIN ANODE PARALLEL TO THE AXIS OF THE TUBE AND A CATHODE SPACED FROM THE ANODE BY A CONSTANT INTERVAL AND OPPOSITE THE ANODE. AN ELECTRODE OF DIHEDRAL CONFIGURATION HAS A VERTEX WITH AN ELONGATED APERTURE FORMED THEREIN IN THE CENTER AREA OF THE VERTEX. THE CATHODE IS POSITIONED IN THE APERTURE AND THE ELECTRODE OPENS TOWARD THE ANODE. AN ELECTRIC FIELD E(Y) IS PRODUCED IN THE AREA BETWEEN THE ANODE AND THE ELECTRODE TO PROVIDE MOVEMENT OF ELECTRONS IN AXIAL DIRECTION OF THE TUBE. A MAGNETIC FIELD B(Y) IS PRODUCED WHICH HAS A STRENGTH WHICH VARIES AS A FUNCTION OF THE DISTANCE Y FROM THE CATHODE TO THE ANODE IN A DIRECTION TRANSVERSE TO THAT OF THE ELECTRIC FIELD AND THE AXIS OF THE TUBE. WHEN THE ELECTRIC FIELD AND THE MAGNETIC FIELD ARE IN A POSITION Y=L, WHEREIN L IS THE POSITION OF THE STABLE ORBIT OF ELECTRONS BETWEEN THE CATHODE AND ANODE, D IS THE CHARGE OF ELECTRONS, M IS THE MASS OF ELECTRONS AND P IS A CONSTANT.

Inventors

• 👤 Norihiko Nakayama
• 👤 Minoru Tanaka
• 👤 Eizo Miyauchi

Bibliographic Details