BIPERIODIC MAGNETRON DEVELOPMENT
Abstract
The design of a biperiodic magnetron is detailed and measurements on sealed-off and demountable versions of the tube are reported. Experimental results point up a serious gap in the microwavefield, insofar as biperiodic, or more generally, multi-periodic-circuit tubes are concerned. A knowledge of the multi-mode problems existing with multi-periodic structures is not sufficient to deal with an active tube. To fully exploit both O-type and M-type interactions, as well as hybrid varieties, a fundamental understanding of the behavior of an electron beam in the presence of such a circuit is necessary. In the biperiodic magnetron the spiral lens performed satisfactorily, insofar as beam transmission is concerned. However, the limitations imposed on the radial velocity distribution with respect to traveling-wave interaction are not known. The electron beam's initial conditions at the entrance plane to the biperiodic structure varies across the beam diameter. These variations, and their deviations from the theoretically designed entrance conditions, affect the gain and efficiency of the device, as well as the degree of excitation of undesired modes. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 1961
- Accession Number
- AD0272141
Entities
People
- F.h. Corregan
- R.e. Chamberlain