Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
Book Description
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.
Thomson Scattering Diagnostic for the Microwave Tokamak Experiment
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
Book Description
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.
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
Book Description
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.
Thomson Scattering Diagnostic for the Microwave Tokamak Expe
Author: J. Foote
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
An Instrument to Sychronize Thomson Scattering Diagnostic Measurements with MHD Activity in a Tokamak
Author: Alan L. Wintenberg
Publisher:
ISBN:
Category : Tokamaks
Languages : en
Pages : 254
Book Description
Publisher:
ISBN:
Category : Tokamaks
Languages : en
Pages : 254
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 892
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 892
Book Description
First Fifty Pps Thomson Scattering Diagnostics in a Tokamak
Author: Kurt Hirsch
Publisher:
ISBN:
Category :
Languages : en
Pages : 20
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 20
Book Description
An Instrument to Synchronize Thomson Scattering Diagnostic Measurements with MHD Activity in a Tokamak
Author: Alan L. Wintenberg
Publisher:
ISBN:
Category :
Languages : en
Pages : 130
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 130
Book Description
First 50 [fifty] pps Thomson scattering diagnostics in a tokamak
Author:
Publisher:
ISBN:
Category :
Languages : de
Pages : 20
Book Description
Publisher:
ISBN:
Category :
Languages : de
Pages : 20
Book Description
The Multipulse Thomson Scattering Diagnostic on the DIII-D Tokamak
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
This paper describes the design and operation of a 40-spatial channel Thomson scattering system that uses multiple 20 Hz Nd:YAG lasers to measure the electron temperature and density profiles periodically throughout an entire plasma discharge. Interference filter polychromators disperse the scattered light which is detected by silicon avalanche photodiodes. The measurable temperature range from 10 eV to 20 keV and the minimum detectable density is about 2 x 1018 m−3. Laser control and data acquisition are performed in real-time by a VME-based microcomputer. Data analysis is performed by a MicroVAX 3400. Unique features of this system include burst mode'' operation, where multiple lasers are fired in rapid succession (
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
This paper describes the design and operation of a 40-spatial channel Thomson scattering system that uses multiple 20 Hz Nd:YAG lasers to measure the electron temperature and density profiles periodically throughout an entire plasma discharge. Interference filter polychromators disperse the scattered light which is detected by silicon avalanche photodiodes. The measurable temperature range from 10 eV to 20 keV and the minimum detectable density is about 2 x 1018 m−3. Laser control and data acquisition are performed in real-time by a VME-based microcomputer. Data analysis is performed by a MicroVAX 3400. Unique features of this system include burst mode'' operation, where multiple lasers are fired in rapid succession (
Thomson Scattering Diagnostic for the TdeV Tokamak
Author: A. Côté
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
Design of the Multi-point Thomson Scattering Diagnostic for the HIT-II Experiment
Author: Chris Hoffman
Publisher:
ISBN:
Category : Thomson scattering
Languages : en
Pages : 132
Book Description
Publisher:
ISBN:
Category : Thomson scattering
Languages : en
Pages : 132
Book Description