Speaker
Description
The simultaneous oscillation of multiple frequencies and the use of a phased array antenna make it possible to measure the instantaneous radial distribution of the wavenumber spectrum S(k, t, r). To realize this, we are developing the phased array antenna which is additive manufactured by a 3D metal printer. In particular, with regard to surface treatment, we have succeeded in applying copper plating to the antenna made of aluminum material,which was sandblasted and chemically polished in the previous workshop report. In addition, we will also show an example of antenna using stainless steel material.
We plan to combine this phased array antenna with a frequency comb oscillator that can generate multiple frequencies simultaneously, and this development is currently underway. Performance evaluation using an initial test bench will also be presented.
This work was partially supported in part by KAKENHI (Nos. 19H01880, 21H04973, 23H01161, and 23K25858), by a budgetary Grant-in-Aid from the NIFS LHD project under the auspices of the NIFS Collaboration Research Program (ULPP027, LHD115), by the Collaborative Research Programs of Research Institute for Applied Mechanics, Kyushu University and by Collaborative Research Programs of the QST. Additional support was provided by Japan/U.S. Cooperation in Fusion Research and Development, and by "PLADyS", JSPS Core-to-Core Program, A. Advanced Research Networks.
