The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Oscillation of 1MW at quad-frequency 203GHz, 170 GHz, 137GHz and 104GHz were demonstrated with a high-order mode (TE31,11) gyrotron developed for ITER. The final design of the ITER equatorial launcher has being implemented. The RF prototype testing to validate the millimeter wave design of the launcher were carried out and the results confirmed the steering range and quality of mm-wave beam and in-directly...
A high-power millimeter-wave beam transmission system for microwave beaming propulsion were designed and tested. A thruster with the transmission system consisted from a launcher and focusing mirrors was operated using a gyrotron. The thruster traveled for 3 m distance generating thrust force.
The structure formation of atmospheric millimeter wave breakdown plasma was observed. The breakdown plasma on a high power Gaussian and the flat beam was compared to each other. The propagation velocity of plasma head and shock wave pressure was measured. The propagation velocity had dependence on peak power density. On the other hand, the stronger shock wave was detected by the flat beam because...
In this study, MMW shock wave was visualized using shadow graph method. The high power MMW beam generated by lMW-class 170GHz gyrotron was supplied into a shock tube which had rectangular section part. At the rectangular part, visible window is put at both sides. The ignition part is set 15cm far from measurement part to avoid the effect of breakdown ignition at the shock tube. The probe light by...
This paper investigates the development of the atmospheric breakdown on the high power Gaussian beam observed using a high speed video camera. The movie with 5-1 mus frame interval time was taken. A high power millimeter wave beam generated by 170 GHz gyrotron was used. First the breakdown at the focal point was observed. The beam was focused using an offset parabolic mirror. A separated ionization...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.