Modified peniotron using a TE₁₁rectangular waveguide cavity

Experimental study of the modified peniotron using TE,, rectangular waveguide cavity

“…The electron collector is mounted just behind the beam exit hole of the cavity. In order to apply a depressed potential, the collector is electrically isolated from the cavity, which is especially useful in the peniotron interaction to increase the conversion efficiency, as described in the previous paper (Razeghi et al 1985). The measured values of loaded Q and resonant frequency of the cavity were in good agreement with the designed values, respectively.…”

“…The design parameters are chosen through our analytical calculations (Razeghi et al 1985) and for convenience in our laboratory, as shown in Table I.…”

“…In 1985, we proposed the modified peniotron which would be expected to have an extremely high conversion efficiency of nearly 100% due to the ideal peniotron interaction in a TEll rectangular waveguide cavity (Razeghi et al 1985). The modified peniotron has the same principle of operation as that of the original which was invented by one of the authors (S. Ono) and K. Yamanouchi (Yamanouchi et al 1964).…”

A W-band sixth-harmonic magnetron-type slotted peniotron

“…1,2 As a medium power oscillator and amplifier, peniotrons, similar to gyrotrons, can be potentially useful in applications such as ceramic sintering in millimeter wave ovens, high-density communications, high-resolution radar, etc. 3,4 To activate a millimeter wave peniotron or gyrotron, it is necessary to generate strong axial magnetic field in the interaction region. Electromagnet solenoid systems, including conventional or superconducting ones, can provide the required strong magnetic field, but they are too large and heavy for many practical applications (e.g., cyclotron device based).…”

History of the Microwave-Tube Art at Tohoku University

“…In the Peniotron electrons in cyclotron motion interact with electromagnetic wave supported by waveguides. interaction circuit (1963, [3]) and Professor K. Yokoo proposed TE11-mode rectangular and also circular waveguides (1985, [4]) as interaction circuits, resulting in extremely high-efficiency of 94% obtained in 1998 [5]. Such high efficiency depends on shifting of all of electron orbit centers of the cyclotron motion to the deceleration electric field of electromagnetic wave in a waveguide resonator without electron bunching.…”