Bench Testing of New Polarimeter with Silicon Photoelastic Modulator for Short Wavelength FIR Laser
スポンサーリンク
概要
- 論文の詳細を見る
A short wavelength laser whose wavelength is about 50 μm is preferable for a polarimeter and an interferometer in large fusion devises. This paper reports the development of a polarimeter with a photoelastic modulator (PEM) for a CH3OD laser (wavelengths of 57.2 and 47.6 μm). The PEM with a high-resistive silicon as a photoelastic element has been newly developed. The transmissivity of the high-resistive silicon is high in a far infrared region. The polarimeter with the Si PEM has been tested and the polarization angle is successfully measured. Noise sources (a multi-reflection of the laser beam in the photoelastic element, a measurement error of amplitude of a detector output and an estimation error of the retardation) of the measured angle are also discussed.
- 社団法人 プラズマ・核融合学会の論文
著者
-
KAWAHATA Kazuo
National Insitute for Fusion Science
-
Okajima Shigeki
Chubu University
-
NAKAYAMA Kazuya
Chubu University
-
Akiyama Tsuyoshi
National Cardiovascular Center
-
KAWAHATA Kazuo
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292, Japan
-
OAKBERG Theodore
Hinds Instruments, Inc., 3175 NW Aloclek Drive Hillsboro, Oregon 97124, U.S.A.
-
NAKAYAMA Kazuya
Chubu University, 1200 Matsumoto-cho, Kasugai-shi, Aichi 487-8501, Japan
関連論文
- Interferometry for Weakly Relativistic Plasmas
- Excitation of Stable Alfvén Eigenmodes by Application of Alternating Magnetic Field Perturbations in the Compact Helical System
- Stability and Confinement Studies of High-Performance NBI Plasmas in the Large Helical Device Toward a Steady-State Helical Fusion Reactor
- Achievement of 10 keV Central Electron Temperatures by ECH in LHD
- Composition of Positive Ions in High-Density H_2 Plasmas Measured by Time-of-Flight Mass Spectrometry
- Feasibility of Microwave Transmissivity Measurement to Obtain Density Profile of Sheet Plasmas
- Local Impurity Deposition in a Magnetic Island by Means of a Tracer-Encapsulated Solid Pellet in the LHD
- Nonthermal Titanium Kα Spectra from Lower-Hybrid-Current-Driven Plasmas in the JIPPT-IIU Tokamak
- Transition of Edge Particle Transport in CHS
- Extension of Improved Particle and Energy Confinement Regime in the Core of LHD Plasma
- Clustered Data Storage for Multi-Site Fusion Experiments
- Causal Relationship between Zonal Flow and Turbulence in a Toroidal Plasma(Gases, plasmas, electric discharges, and beams)
- Conceptual Design of a Dispersion Interferometer Using a Ratio of Modulation Amplitudes
- Improved Resolution and Stability in a Dispersion Interferometer Using a Modulation Amplitude Ratio
- IN VIVO MONITORING OF LOCAL MYOCARDIAL INTERSTITIAL ACETYLCHOLINE BY DIALYSIS TECHNIQUE
- -209- IMPAIRED LEFT VENTRICULAR DIASTOLIC FUNCTION DURING VASOSPASM STUDIED BY PULSED DOPPLER ECHOCARDIOGRAPHY : Cardiac : FREE COMMUNICATIONS(I) : PROCEEDINGS OF THE 51th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- Construction of a 100-Hz-Repetition-Rate 28-Channel Thomson Scattering System for the JIPPT-IIU Tokamak
- Improvement in Plasma Heating at Higher-Density Region Using 106.4GHz Electron Cyclotron Heating System for Compact Helical System(Gases, plasmas, electric discharges, and beams)
- Observation of Mode-Converted Ion Bernstein Wave by an HCN Laser Scattering
- Application of a Schottky Barrier Diode Mixer to a 118.8 μm Laser lnterferometer
- Observation of Mode-Converted Ion Bernstein Wave by an HCN Laser Scattering
- Calibration Source for Electron Cyclotron Emission Measurements
- Feasibility of Electron Density Measurement Using Relativistic Downshift Frequency Effect of Electron Cyclotron Emission in Tokamak Plasmas
- IN VIVO SYMPATHETIC INTERVENTION IN ACETYLCHOLINE RELEASE IN THE LEFT VENTRICLE
- Progress in Impurity-Related Physics Experiments in LHD
- Far Infrared Laser Diagnostics on the Compact Helical System
- Potential Measurement with the 6-MeV Heavy Ion Beam Probe of LHD
- Turbulence Response in the High Ti Discharge of the LHD
- Long Range Temperature Fluctuation in LHD
- Electrostatic Potential Measurement by Using 6-MeV Heavy Ion Beam Probe on LHD
- Observation of Edge Reynolds Stress Increase Preceding an L-H Transition in Compact Helical System
- Transport Dynamics and Multi-Scale Coupling of Turbulence in LHD
- AN ATTEMPT AT SPECTRAL DETECTION OF PHENOLOGICAL CHANGES OF BOREAL VEGETATION (15th Symposium on Polar Biology)
- Measuring Electron Temperature in the Tandem Mirror GAMMA 10 Plasma Using a Yttrium-Aluminum-Garnet Thomson Scattering System
- Density Regimes of Low-Aspect-Ratio RFP Plasmas in RELAX
- Particle Transport and Fluctuation Characteristics around the Neoclassically Optimized Configuration in LHD
- Configuration Effects on Local Transport in High-Beta LHD Plasmas
- Experimental Conditions for Electron Bernstein Wave Heating Using EC Waves Injected from High-Field Side in CHS
- Development of a Plasma Diagnostics System Using an Impulse Waveform Voltage
- Improved Data Acquisition Methods for Uninterrupted Signal Monitoring and Ultra-Fast Plasma Diagnostics in LHD
- Bi-Coherence Analysis of Fluctuations with Long Distance Correlation in Toroidal Plasmas
- Conceptual Design of Electron Density Measurement System for DEMO-Relevant Helical Plasmas
- Development of Collective Thomson Scattering Diagnostic for Bulk and Fast Ions in the Large Helical Device
- Improvements of CO2 Laser Heterodyne Imaging Interferometer for Electron Density Profile Measurements on LHD
- Present Status in the Development of 6 MeV Heavy Ion Beam Probe on LHD
- Study of Edge Transport Barrier Formation on CHS Plasma
- Nonstop Lose-Less Data Acquisition and Storing Method for Plasma Motion Images
- Design and Installation of a New Electron Cyclotron Emission Diagnostic Antenna in LHD
- Composition of Positive Ions in High-Density H2 Plasmas Measured by Time-of-Flight Mass Spectrometry
- Simulation Studies on Advanced Microwave Diagnostics and Related Technology
- Broadband Multichannel Radiometer for ECE Measurements on KSTAR
- Pellet Injection and Internal Diffusion Barrier Formation in Large Helical Device
- Characteristics of Radiating Collapse at the Density Limit in the Large Helical Device
- Time Evolution of the Rotational Transform Profile in Current-Carrying LHD Plasmas
- Determination of the Major Impurity Radiators in the Reheat Mode Discharges in the Compact Helical System
- Electron Bernstein Wave Heating through Slow X-B Mode Conversion in CHS
- O-X-B Heating of Overdense Plasmas by 54.5 GHz Electron Cyclotron Waves in CHS
- Development of ECE Imaging System on LHD
- Effects of Resonant Magnetic Fluctuations on Plasma Confinement in Current Carrying high-β Plasmas of LHD
- Onset of Resistive Interchange Mode in the Large Helical Device
- Measurements of Micro-Turbulence in High Beta and High Density Regimes of LHD and Comparison with Resistive G-Mode Scaling
- Laser Scattering Measurement of the Electron Density Fluctuations in CHS
- Characteristic Formation of Edge Transport Barrier in the Compact Helical System
- Bispectral Analysis of Harmonic Oscillations Measured using Beam Emission Spectroscopy and Magnetic Probes in CHS
- Advanced Laser Diagnostics for Electron Density Measurements
- Calibrations of Fast Ion Flux Measurement Using a Hybrid Directional Probe
- Bench Testing of New Polarimeter with Silicon Photoelastic Modulator for Short Wavelength FIR Laser
- Design of the 48, 57 μm Poloidal Polarimeter for ITER
- Reconstruction of Edge Density Profiles Using Ultrashort-Pulse Reflectometry in LHD
- Density Reconstruction Using a Multi-Channel Far-Infrared Laser Interferometer and Particle Transport Study of a Pellet-Injected Plasma on the LHD
- Observation of the Internal Structure of Energetic Particle-Driven MHD Modes in a Large Helical Device
- Performance Improvement in Real-Time Mapping of Thomson Scattering Data to Flux Coordinates in LHD
- Instrumental Capabilities and Limitations of Two-Dimensional Phase Contrast Imaging on LHD
- Plasma Diagnostics Required for a Heliotron-Type DEMO Reactor
- First Observation of High Density Edge Transport Barrier Formation during Reheat Mode of Helical Plasma in CHS
- A Simultaneous Spectroscopic Measurement of the Global and Edge Local Structures in the Ion Temperature and Plasma Rotation Profiles in the Compact Helical System
- Investigation of the Microwave Iron-Production Process with Multipoint Pyrometric and Spectroscopic Measurements
- Interpretation of Line-Integrated Signals from 2-D Phase Contrast Imaging on LHD
- Development of Short-Wavelength Far-Infrared Lasers and Optical Elements for Plasma Diagnostics
- Notch Filter in 70 GHz Range for Microwave Plasma Diagnostics