Self-modulating,partially reentrant crossed field amplifier

Abstract

Abstract A COLD CATHODE DISTRIBUTED EMISSION REENTRANT TYPE CROSSED FIELD AMPLIFIER IS PROVIDED WHICH POSSESSES ELECTRICAL EFFICIENCES APPROACHING THAT AVAILABLE IN THE REENTRANT TYPE CROSSED FIELD AMPLIFIERS OF THE PRIOR AT BUT WHICH FEATURES THE SIMPLICITY OF THE NON-REENTRANT TYPE CROSSED FIELD AMPLIFIER. A CIRCULAR CONFIGURATION IS USED FOR THE TUBE? ONE IN WHICH THE BEGINNING AND END OF THE INTERACTION REGION IS CONNECTED WITH THE DRIFT SPACE REGION, SO AS TO FORM A COMPLETE ANNULAR PASSAGE ABOUT THE SOLE AND CATHODE. THE MAGNETIC STRUCTURE PRODUCES A MAGNETIC FIELD AT THE PROGRAMMED LEVEL, WHICH MAY BE CONSTANT, IN THE INTERACTION REGION AND IN ADDITION PROVIDES A VARIATION IN THE DRIFT SPACE. AT THE ENTRANCE TO THE DRIFT SPACE AND MAGNETIC INTENSITY DECREASES AS A FUNCTION OF POSITION ALONG THE LENGTH OF THE DRIFT SPACE FROM THE PROGRAMMED LEVEL, GRADUALLY, OVER A PREDETERMINED LENGTH OF THE DRIFT SPACE TO A SECOND LOWER PREDETERMINED INTENSITY. ALONG THE REMAINING LENGTH OF THE DRIFT SPACE THE FIELD INTENSITY INCREASES IN LEVEL UNTIL AT THE END OF THE DRIFT SPACE, COINCIDENT WITH THE BEGINNING OF THE INTER- ACTION REGION, THE MAGNETIC FIELD INTENSITY IS AGAIN AT THE PROGRAMMED LEVEL. THE TAPERING OF THE MAGNETIC FIELD IN THE DRIFT SPACE REGION IS DESIGNED SO THAT IT DIVERTS SIGNIFICANT AMOUNTS OF THOSE ELECTRONS THAT PASS THROUGH THE INTERACTION REGION AND ENTER THE DRIFT SPACE REGION. HENCE, THE REMAINING ELECTRONS WHICH REENTER THE INTERACTION REGION ARE INSUFFICIENT IN QUANTITY OR ENERGY TO CAUSE SELF-OSCILLATION AFTER THE RF-DRIVE SIGNAL HAS BEEN REMOVED.

Inventors

• 👤 Philip N Hess

Bibliographic Details