1. Development and applications of submillimeter wave gyrotron FU series
FIR FU
Seminar PPPL March 2005
Development and applications of submillimeter wave
gyrotron FU series
T. Idehara
Research Center for Development of Far Infrared Region
University of Fukui
Contents
1. INTRODUCTION
2. DEVELOPMENT OF GYROTRON FU SERIES
3. APPLICATIONS OF GYROTRON FU SERIES
4. SUMMARY

2. International collaboration
FIR FU
International collaboration
Development of submillimeter wave gyrotrons
University of Sydney, School of Physics
Karlsruhe Research Center
Institute of Applied Physics, Russian Academy of Science
Institute of Electronics, Bulgarian Academy of Science
Development of quasi optical transmission system
Stuttgart University, Plasma Research Institute
Applications of submillimeter wave gyrotrons
Princeton University, PPPL (Plasma scattering measurement)
Karlsruhe Research Center (High quality ceramic sintering)
Warwick University, NMR Center (High sensitive NMR by DNP)

3. FIR FU POWER vs. FREQUENCY (for high frequency radiation sources)
Gyrotron - high power source in THz range
POWER vs. FREQUENCY
(for high frequency radiation sources)

4. High power THz source developed in FIR FU
High power THz source - Gyrotron
High power THz source developed in FIR FU
　GYROTRON FU SERIES

5. FIR FU THz Gyrotron THz Gyrotron using a pulse magnet
GYROTRON FU SERIES will achieve breakthrough of 1 THz　
THz Gyrotron using a pulse magnet

6. Frequency, GHz 300 ± 2 High power 300 GHz Gyrotron FIR FU
Maximal CW output power, kW , not less
Range of CW output power, kW
Cavity radius, mm 　　　8.39
Cavity Q factor 　　　　6000
Type of gun 　　　　quasi-diode
Material of Emitter 　　　LaB6
Maximal beam voltage, kV 　 ± 1
Maximal beam current, A 　1.1 ± 0.1
Beam radius, mm 　　　3.71
Pitch-factor 　　　　
Output window diameter, mm 　　 80
Output window material 　　BN
Output mode 　　　　wave beam
Operating mode 　　 　TE22,8
Water cooling:
flow rate (approximate), m3/hour
inlet pressure range, bar from 3.0 to 4.0
outlet pressure, bar 　　 0.5
maximal inlet temperature, 0C 　 30
Maximum field intensity, T

7. FIR FU PLASMA SCATTERING MEASUREMENTS Compact Helical System (CHS)
at National Institute for Fusion Science, Toki, Japan
f=352 GHz (TE161 mode), P=110 W

8. FIR FU SCATTERED SIGNAL FROM CHS PLASMA
(time evolution and frequency spectra)
Plasma production: (a) 200 kW ECH 53 GHz
(b) 400kW ECH 106 GHz
Plasma heating: (a) 1000 kW NBI #1
(b) 600 kW NBI #2
Magnetic field: T
Electron temperature: eV
Scattering region: 77 cm
Scattering angle: deg
Frequency of gyrotron GHz

9. ESR EXPERIMENTS USING A GYROTRON
FIR FU
ESR EXPERIMENTS USING A GYROTRON
AS A RADIATION SOURCE
The schematic drawing of ESR spectrometer with Gyrotron FU-IVA

10. 24 GHz compact gyrotron ceramics sintering system
FIR FU
24 GHz compact gyrotron ceramics sintering system
Specification
Output power　　0.1～ 2.5 kW (CW)
Operating frequency 　 GHz 　　　　　　　　　　　(Second harmonic )
Mode　　 　 TE11
Magnetic field 　　 　 ～ 　0.45 T

11. FIR FU A NEW MEDICAL TECHNOLOGY (development of a catheter
for a submillimeter wave)
Frequency of gyrotron f=301 GHz, Output power P=20 W

12. FIR FU
IRRADIATION ON LIVER OF LIVING RAT

13. FIR FU
Summary
1.Development of high power THz source GYROTRON FU SERIES
　 High frequency:　890 GHz，　Breakthrough of 1 THz
　　High stability: frequency stability 10-10, amplitude stability 10-3
　　High harmonic operation: 5th harmonic operation by LOG
　　High purity moded operation: Mode purity 95% for several cavity modes
2. Conversion of gyrotron output to Gaussian mode
Transmission with high efficiency
3. Devderlopment of high power THz technologies using a gyrotron as a radiation source
　 Submillimeter wave ESR　　 Gyrotron FU IV and FU IVA
　 Plasma scattering measurement　 Gyrotron FU II
　 High sensitive NMR by DNP GHz gyrotron under development
　 Sintering of high quality ceramics　24 GHz and 300 GHz gyrotrons
　 New medical technology　 Gyrotron FU IV and 300 GHz,CW Gyrotron