Magnetron Simulations using a multiple wavelength computer code

A multiple wavelength extension (MWMAG) of a prior single moving wavelength code for the simulation of magnetrons (DEMAG) has been prepared and used to examine the operation of the 4J52 X-band magnetron. The multiple wavelength code simulates all of the wavelengths in the magnetron, eliminating the questionable assumption in the single wavelength code that all wavelengths are identical. The gross power, efficiency, and dissipation results obtained using the multiple wavelength code are close to those obtained using the single wavelength code. Details of the interaction are, however, significantly different-particularly when secondary emission is dominant as is the case in most magnetrons. In this case, there is a disturbance in the form of voids traveling through the space charge, which have a wavelength which is different from the radio frequency wavelength.