A5075470532- Gyrotron and Vacuum Electronics Research
- Microwave Engineering and Waveguides
- Insects and Parasite Interactions
- Particle accelerators and beam dynamics
- Pulsed Power Technology Applications
- Semiconductor materials and devices
- Acoustic Wave Resonator Technologies
- Advanced Memory and Neural Computing
- Advancements in Semiconductor Devices and Circuit Design
National Tsing Hua University
2013-2025
Gyromonotrons are typically believed to rely on the convective interaction between co-propagating beam and wave, with extended energy-exchanging process stemming from external feedback. However, numerous studies focusing both transverse electric (TE) mode magnetic (TM) gyrotrons have consistently shown that beam–wave interactions in weak-feedback systems or even uniform tubes without any structural feedback can yield a theoretical efficiency of more than 30% major forward-wave output during...
For a long time, most gyrotron oscillators have avoided using TM modes because of the concerns about strong bunching competition and relatively weak beam−wave coupling. However, this work demonstrates that an axis-encircling electron beam with high mode selectivity is adapted to preclude parasitic makes TM12-mode oscillation in open-cavity-type system feasible. Considering excited at fundamental cyclotron harmonic, TE12 remains be only competitor targeted TM12 mode; however, it will...
Self-align nitride (SAN) logic NVM cell has been successfully demonstrated in 28nm CMOS technology with high-k gate dielectric layer and metal WL for coupling. This work proposed a new method program erase of the SAN cells, when length spacing scales aggressively to 40nm 70nm, respectively. Reliable 2-bit per operation by local hot hole injection controlled WLs are future applications high density arrays.
Recent advancements have shown that transverse magnetic (TM)-mode gyrotrons are feasible under specific conditions, yet their capabilities remain insufficiently explored. This article systematically investigates a W-band TM11-mode gyrotron within the down-tapered structure(s) to uncover its limitations and underlying physics. 2D interaction-efficiency maps scanned as functions of tube's geometrical parameters or beam magnetic-field tuning. An oversized tube integrated with short two-stage...