Gyrotron physics from linear to chaotic regimes: experiment and numerical modeling
Event details
| Date | 07.03.2016 |
| Hour | 10:30 › 11:30 |
| Speaker | Falk Braunmueller, SPC-EPFL |
| Location |
PPB 019
|
| Category | Conferences - Seminars |
Gyrotrons, which are mainly developed as a coherent radiation source for plasma-heating (P_rf=0.1-1MW, f_rf=50-170GHz), are also increasingly used in Nuclear Magnetic Resonance (NMR) spectroscopy, where a dramatic enhancement in sensitivity can be achieved via Dynamic Nuclear Polarization (DNP).
A gyrotron prototype developed at SPC/EPFL for the DNP-application will be described and analyzed in detail. The DNP-gyrotron, which has a maximum RF-power of 150W and an RF-frequency that is tunable over a small range around 260GHz, has demonstrated to be an ideal test-bench for fundamental research on the beam-wave interaction process.
The main topic of this presentation concentrates on the experimental measurements and numerical modeling of novel non-stationary regimes, characterized by a multi-frequency spectrum and a nanosecond-modulated RF-power. For appropriately modeling these regimes, a novel simulation code has been developed, based on a more generally valid model. In an experiment-theory comparison, the code has already proven its capability for reproducing and interpreting the experimental results.
A gyrotron prototype developed at SPC/EPFL for the DNP-application will be described and analyzed in detail. The DNP-gyrotron, which has a maximum RF-power of 150W and an RF-frequency that is tunable over a small range around 260GHz, has demonstrated to be an ideal test-bench for fundamental research on the beam-wave interaction process.
The main topic of this presentation concentrates on the experimental measurements and numerical modeling of novel non-stationary regimes, characterized by a multi-frequency spectrum and a nanosecond-modulated RF-power. For appropriately modeling these regimes, a novel simulation code has been developed, based on a more generally valid model. In an experiment-theory comparison, the code has already proven its capability for reproducing and interpreting the experimental results.
Practical information
- Informed public
- Free
Organizer
- Prof. P. Ricci
Contact
- Prof. P. Ricci