| 摘要 |
FIELD: physics.SUBSTANCE: use of automatic frequency tuning devices is provided to match the frequency of RF power provided to an accelerator with the accelerator resonance frequency. In one version, where the RF power pulse generator is a mechanically tunable magnetron, automatic frequency tuning is provided to match the frequency of RF power pulses at one power level to the accelerator resonance frequency when those RF power pulses are provided, and the magnetron is operated such that frequency shift in the magnetron at the other supply power level at least partially matches the resonance frequency shift in the accelerator when those RF power pulses are provided. In other versions, when the RF power pulse generator is a klystron or electrically tunable magnetron, a separate automatic frequency tuning device is provided for each power level of the RF pulses.EFFECT: high efficiency of examining contents of various objects without opening said objects.44 cl, 8 dwg |
