2024-12-03 ペンシルベニア州立大学(PennState)
A team of Penn State researchers used mathematical modeling to explain the underlying mechanism at play in X-ray emissions that was previously not understood. Credit: iStock/artisteer. All Rights Reserved.
＜関連情報＞
- https://www.psu.edu/news/engineering/story/x-ray-vision-seeing-through-mystery-x-ray-emissions-mechanism
- https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.235301
高過電圧でのガス放電における暴走電子加速の光電フィードバック機構を解明 Photoelectric Feedback Mechanism for Acceleration of Runaway Electrons in Gas Discharges at High Overvoltages
Victor P. Pasko, Sebastien Celestin, and Anne Bourdon
Physical Review Letters Published 2 December, 2024
DOI:https://doi.org/10.1103/PhysRevLett.133.235301
Abstract
Energy conservation dictates that an electron with elementary charge traversing a vacuum gap formed by electrodes maintained at potential difference volts acquires maximum energy of . In many experiments electrons with energies as high as 3 have been observed. The experimental discovery of this effect was made over 50 years ago and is still a subject of significant controversy in applications related to x-ray generation from high voltage discharges. Here we explain these observations by a sequential increase of energy of runaway electrons released from the cathode due to the photoelectric absorption of bremsstrahlung radiation generated by the previous cycle of runaway electrons bombarding the anode.
