Coaxial Multiple Laser Beam Combiner for the LHD Thomson Scattering System
スポンサーリンク
概要
- 論文の詳細を見る
We developed a polarization-based beam-combining method for multiple lasers to improve the time resolution and accuracy of a large helical device (LHD) Thomson scattering system. We combined two or more beams from different apertures of the laser heads in series into a coaxial beam line with the use of polarization optics. We have implemented this beam-combining method in an LHD Thomson scattering system from the 15th experimental campaign. We also propose a method of combining three or more laser beams by the use of a Pockels cell.
著者
-
FUNABA Hisamichi
National Insitute for Fusion Science
-
NARIHARA Kazumichi
National Insitute for Fusion Science
-
YAMADA Ichihiro
National Insitute for Fusion Science
-
HAYASHI Hiroshi
National Institute for Fusion Science, Toki 509-5292, Japan
-
YASUHARA Ryo
National Institute for Fusion Science
関連論文
- Abrupt Flushing of High-Density Core in Internal Diffusion Barrier Plasmas and its Suppression by Plasma Shape Control in LHD
- Achievement of 10 keV Central Electron Temperatures by ECH in LHD
- Comparative Study on Effect of Boronization and Titanium Gettering in Compact Helical System Heliotron/Torsatron Device
- Analysis of Radial Electric Field Bifurcation in LHD Based on Neoclassical Transport Theory
- Bifurcation of Heat Transport in High Temperature Plasma(Gases, plasmas, electric discharges, and beams)
- DOUBLE ELECTRON CAPTURE IN SLOW, HIGHLY CHARGED ION-MOLECULE COLLISIONS
- Extension of Improved Particle and Energy Confinement Regime in the Core of LHD Plasma
- Dependence of Plasma Profiles on Ech Power Absorption in Heliotron-E
- Development of a Hierarchy-Integrated Simulation Code for Toroidal Helical Plasmas, TASK3D
- Impurity Retention Effect in the Edge Ergodic Layer of the Large Helical Device
- Construction of a 100-Hz-Repetition-Rate 28-Channel Thomson Scattering System for the JIPPT-IIU Tokamak
- CHARGE DEPENDENCE OF RADIATIVE STABILIZATION AFTER DOUBLE ELECTRON TRANSFER IN HIGHLY CHARGED ION-MOLECULE COLLISIONS
- Measurements of Absolute Cross Sections for Electron-Impact Ionization of Doubly Charged Rare Gas Ions:Ne^,Ar^,Kr^,andXe^
- Electron Impact Ionization of F^+,Ne^+,Cl^+ and Ar^+ Ions
- Electron Impact Ionization of C^+,N^+ and P^+ Ions
- Electron Impact Ionization of O^+,S^+and S^+Ions
- Steady-State Tokamak Operation by Use of Magnetic Monopoles
- In Situ Laser Beam Alignment for Thomson Scattering System
- Time-Dependent NBI-Heating Simulation of LHD Plasmas Using Toroidal Transport Analysis Linkage Code
- High Speed Recording Characteristics of 3-Beam Drive : Drive Technology
- High Speed Recording Characteristics of 3-Beam Drive
- Application of Zeff Profile Analysis Based on Visible Bremsstrahlung Measurement to Different Density Profiles in the LHD
- High-Speed Magneto-Optic Disk Drive with Overwriting and Read-Verifying Functions : Drive Technology
- High-Speed Magneto-Optic Disk Drive with Overwriting and Read-Verifying Functions
- Progress in Impurity-Related Physics Experiments in LHD
- Potential Measurement with the 6-MeV Heavy Ion Beam Probe of LHD
- Turbulence Response in the High Ti Discharge of the LHD
- Electrostatic Potential Measurement by Using 6-MeV Heavy Ion Beam Probe on LHD
- Electron Heat Transport Analysis of Low-Collisionality Plasmas in the Neoclassical-Transport-Optimized Configuration of LHD
- Measuring Electron Temperature in the Tandem Mirror GAMMA 10 Plasma Using a Yttrium-Aluminum-Garnet Thomson Scattering System
- Development of a Bright Polychromator for Thomson Scattering Measurements
- Particle Transport and Fluctuation Characteristics around the Neoclassically Optimized Configuration in LHD
- Improvement of Ion Confinement in Core Electron-Root Confinement (CERC) Plasmas in Large Helical Device
- Configuration Effects on Local Transport in High-Beta LHD Plasmas
- Effects of the Stochasticity on Transport Properties in High-β LHD
- Development of a Plasma Diagnostics System Using an Impulse Waveform Voltage
- Conceptual Design of Electron Density Measurement System for DEMO-Relevant Helical Plasmas
- Development of Portal Web Pages for the LHD Experiment
- Transport Study of LHD High-Beta Plasmas Based on Power Balance Analysis with TASK3D Code Module
- Present Status in the Development of 6 MeV Heavy Ion Beam Probe on LHD
- Bifurcation of Heat Transport in High Temperature Plasma
- Effects of Plasma Radiation on the Thomson Scattering Diagnostic Installed on the Large Helical Device
- Electron Temperature Measurement on QUEST Spherical Tokamak by Thomson Scattering System
- Assessment of Plasma Performance in a Magnetic Configuration with Reduced Poloidal Coils for a Helical DEMO Reactor FFHR-d1
- Density Regimes of Complete Detachment and Serpens Mode in LHD
- Multi-Functional Diagnostic Method with Tracer-Encapsulated Pellet Injection
- Coaxial Multiple Laser Beam Combiner for the LHD Thomson Scattering System
- 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
- Effect of Ellipticity on Thermal Transport in ECH Plasmas in LHD
- Dependence of EC-Driven Current on the EC-Wave Beam Direction in LHD
- Ion Heating Experiments Using Perpendicular Neutral Beam Injection in the Large Helical Device
- Observation of Minor Collapse of Current-Carrying Plasma in LHD
- New Calibration Method of Magnetic Measurements Based on the MHD Equilibrium with the Ergodic Region
- Raman and Rayleigh Calibrations of the LHD YAG Thomson Scattering
- 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
- ECCD Experiment Using an Upgraded ECH System on LHD
- Development of 2-D Thomson Scattering Measurement Using Multiple Reflection and the Time-of-Flight of Laser Light
- Observation of the Effect of Energetic Ions on Pellet Ablation in the Large Helical Device
- Direct Observation of Inward Electron Flux being Blocked 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
- Performance Improvement in Real-Time Mapping of Thomson Scattering Data to Flux Coordinates in LHD
- Neoclassical Transport Properties in High-Ion-Temperature Hydrogen Plasmas in the Large Helical Device (LHD)
- Impurity Transport Study with TESPEL Injection and Simulation
- Injection and Confinement of a Laser Pulse in an Optical Cavity for Multi-Pass Thomson Scattering Diagnostics in the TST-2 Spherical Tokamak Device