Frequency modulation of gyrotrons and its application to high sensitivity NMR spectroscopy using dynamic nuclear polarization

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630142
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Electron device/Electronic equipment
• Research Institution: University of Fukui
• Principal Investigator: IDEHARA Toshitaka 福井大学, 遠赤外領域開発研究センター, 特任教授 (80020197)
• Co-Investigator(Kenkyū-buntansha): OGAWA Isamu 福井大学, 遠赤外領域開発研究センター, 教授 (90214014) ; MITSUDO Seitaro 福井大学, 遠赤外領域開発研究センター, 教授 (60261517)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: ジャイロトロン / DNP-NMR / サブテラヘルツ / 周波数変調 / 長時間安定動作 / ESR / NMR

Outline of Final Research Achievements

By irradiation of high power sub-THz radiation from gyrotrons, magnetic polarization of electron spin is transfered to nuclear spin which results in the high sensitive NMR spectroscopy by use of dynamic nuclear polarization (DNP) effect. In this work, we will achieve further enhancement of NMR sensitivity by add following three functions on the gyrotrons,
1) By the modulation of an electron beam energy, we will achieve the frequency modulation of gyrotron output in order to extend the ESR resonance width and increase the number of electron spin which contribute to DNP. 2) By stabilization of the electron beam current, we will achieve the long-term stable gyrotron operation. 3) By making the gyrotron system compact, we can access the gyrotron system to big scale NMR spectrometer system.

Free Research Field

テラヘルツ理工学