Gigawatt Long Pulse Microwave Source

Period of Performance: 09/27/2000 - 09/27/2002

$499K

Phase 2 STTR

Recipient Firm

Mission Research Corp.
735 State Street
Santa Barbara, CA 93101
Principal Investigator
Firm POC

Research Institution

Northeastern University
360 Huntington Ave
Boston, MA 02115
Institution POC

Abstract

A fundamental investigation of noise in microwave tubes, concentrating on crossed-field devices (CFDs), is proposed. The work will revolve around MRC's proprietary, fully-3D, PIC code, MAGIC-3D. The code work will be supported by experiment and by the application of existing or incrementally-extended theory. MRC will team with Northeastern University (NEU) and an MIT Plasma Fusion Center staffer in this work. In Phase I, simulations were performed of both a "cooker" magnetron, and a "baby" amplitron, experiments were performed on the cooker magnetron, and a review was conducted of previous work on noise in CFDs, especially theory. In Phase-II MRC plans simulation work on each of the three main types of CFDs: magnetrons (further cooker work), forward wave CFAs (NEU's laboratory device and the Aegis tube), and amplitrons (further "baby" work). The study of each will compliment work on the others. Further experiments with cooker magnetrons and with the well-diagnosed NEU device, including investigating the use a unique MRC optical diagnostic, along with existing data and existing/extended theory, will support the code work. Phase-II objectives are to verify the code on CFDs and to better understand noise in CFDs in particular and microwave tubes in general.