Title :
A design software suite for periodic permanent magnet stacks
Author :
Chia-Lie Chang ; Baird, M. ; Chernin, D. ; Czarnaski, M. ; Harper, R. ; Holstein, D.G. ; Levush, B.
Author_Institution :
SAIC, McLean, VA, USA
Abstract :
We report on an advanced analysis tool that facilitates the design and development of periodic permanent magnet (PPM) focusing systems used in traveling wave tubes (TWTs). The tool consists of three modules that share design data through a graphical user interface. One module, called mPPM, analyzes an infinitely long periodic stack using an application of magnetic circuit theory. The second module analyzes beam stability by computing the focusing properties of the stack as a user-specified electron beam propagates through it. The third module is the LesPPM code of R. Jackson, which computes the B-field of a finite length PPM stack, i.e. a magnet stack with open ends, using an equivalent coil approach.
Keywords :
electron beam focusing; electronic design automation; microwave tubes; periodic structures; permanent magnets; travelling wave tubes; B-field; beam stability; design software suite; equivalent coil approach; finite length PPM stack; focusing properties; focusing systems; graphical user interface; infinitely long periodic stack; periodic permanent magnet stacks; traveling wave tubes; user-specified electron beam; Coils; Electron beams; Graphical user interfaces; Magnetic analysis; Magnetic circuits; Magnetic flux; Magnetostatic waves; Permanent magnets; Software design; Stability;
Conference_Titel :
Vacuum Electronics Conference, 2000. Abstracts. International
Conference_Location :
Monterey, CA, USA
Print_ISBN :
0-7803-5987-9
DOI :
10.1109/OVE:EC.2000.847428
