Development and application of a high frequency pulsed ESR system by using high power THz gyrotron as light source

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05144
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: University of Fukui
• Principal Investigator: Seitaro Mitsudo 福井大学, 遠赤外領域開発研究センター, 教授 (60261517)
• Research Collaborator: FUJII YUTAKA 福井大学, 遠赤外領域開発研究センター, 准教授 ; TATEMATSU YOSHINORI 福井大学, 遠赤外領域開発研究センター, 教授
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 高周波ESR / パルスESR / ミリ波 / 強磁場 / BDPAラジカル / FID / ジャイロトロン / 準光学

Outline of Final Research Achievements

In order to realize millimeter wave pulsed ESR measurement, a pulsed ESR system using a 154 GHz gyrotron oscillator as a high-power millimeter wave source had been successfully developed. Intense and short excitation millimeter wave pulses by using a gyrotron output, a high-power millimeter wave pulse forming system has been developed by using light controlled semiconductor shutters. Quasi-optical transmission system that obtains pulsed ESR signal by using this ultrashort pulse as excitation light. This system was successfully applied to measure the FID signal of BDPA radicals. As these results, it shows that in the high frequency region, it can be achieved by using a high frequency gyrotron oscillator in pulsed ESR measurement, which was considered to be difficult to increase the frequency from the lack of the high-power excitation light source, further higher frequency can be achieved, respectively.

Free Research Field

磁気共鳴法を用いた磁性や量子計算デバイスに関する研究