Observation of Thomson Scattering from Ion Thermal Fluctuations in a Tokamak Plasma with a 385[mu]m Laser PDF Download
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Author: Paul P. Woskov
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Languages : en
Pages : 16
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![Observation of Thomson Scattering from Ion Thermal Fluctuations in a Tokamak Plasma with a 385[mu]m Laser PDF](https://books.google.com/books/content/images/frontcover/AFcvHQAACAAJ?fife=w80-h100)
Author: Paul P. Woskov
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Category :
Languages : en
Pages : 16
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Languages : en
Pages : 10
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Author: Steven Howard Batha
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Category :
Languages : en
Pages : 392
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Author: Richard G. Seasholtz
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Category : Plasma (Ionized gases)
Languages : en
Pages : 60
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Author: Paul P. Woskov
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Languages : en
Pages : 32
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The author's involvement in the development of thermal collective Thomson scattering for ion energy distribution measurements in plasmas is reviewed from early work with far infrared lasers and experiments on Alcator C to gyrotrons and JET, TEXTOR, and ASDEX Upgrade experiments.
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Languages : en
Pages : 12
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The Thomson-scattering diagnostic system (TSS) on the Microwave Tokamak Experiment (MTX) at LLNL routinely monitors electron temperature (T{sub e}) and density. Typical measured values at the plasma center under clean conditions are 900 {plus minus} 70 eV and 1 to 2 x 1014 ({plus minus}30%) cm−3. The TSS apparatus is compact, with all elements mounted on one sturdy, two-level optics table. Because of this, we maintain with minimum effort the alignment of both the ruby-laser input optics and the scattered-light collecting optics. Undesired background signals, e.g., plasma light as well as ruby-laser light scattered off obstacles and walls, are generally small compared with the Thomson-scattered signals we normally detect. In the MTX T{sub e} region, the TSS data are definitely fitted better when relativistic effects are included in the equations. Besides determining the temperature of the Maxwellian electron distribution, the system is designed to detect electron heating from GW-level free-electron laser (FEL) pulses by measuring large wavelength shifts of the scattered laser photons. TSS data suggest that we may indeed by able to detect these electrons, which can have energies up to 10 keV, according to computer simulation. 7 refs., 4 figs.
Author: David Yoon Hee Rhee
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Languages : en
Pages : 320
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Category :
Languages : en
Pages : 27
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We propose a collective Thomson scattering experiment at the VUV free electron laser facility at DESY (FLASH) which aims to diagnose warm dense matter at near-solid density. The plasma region of interest marks the transition from an ideal plasma to a correlated and degenerate many-particle system and is of current interest, e.g. in ICF experiments or laboratory astrophysics. Plasma diagnostic of such plasmas is a longstanding issue. The collective electron plasma mode (plasmon) is revealed in a pump-probe scattering experiment using the high-brilliant radiation to probe the plasma. The distinctive scattering features allow to infer basic plasma properties. For plasmas in thermal equilibrium the electron density and temperature is determined from scattering off the plasmon mode.
Author: Alan Stephen Fisher
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Category :
Languages : en
Pages : 576
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Category :
Languages : en
Pages : 18
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