Author: Rajeev Rajan RohatgiPublisher:
ISBN:
Category :
Languages : en
Pages : 294
Book Description
A Study of Lower Hybrid Wave Propagation on the Versator II Tokamak Using Microwave Scattering
Author: Rajeev Rajan RohatgiPublisher:
ISBN:
Category :
Languages : en
Pages : 294
Book Description
Energy Research Abstracts
Author: Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 404
Book Description
An Experimental Study of Lower Hybrid Current Drive on the Versator II Tokamak
Author: Matthew James MayberryPublisher:
ISBN:
Category :
Languages : en
Pages : 408
Book Description
Fusion Energy Update
Author: Publisher:
ISBN:
Category : Controlled fusion
Languages : en
Pages : 364
Book Description
Lower-hybrid-heating Experiments on the Alcator C and the Versator II Tokamaks
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Initial results are reported from lower hybrid wave heating experiments carried out on the MIT Alcator C and Versator II tokamaks. In the Alcator C experiments a 4 waveguide array, with internally brazed ceramic windows has been used to inject 160 kW of microwave power at 4.6 GHz into the plasma with n0 less than or equal to 1 x 1015 cm−3, and B0 less than or equal to 12 T. An RF power density of 8 kW/cm2 has been transmitted into the plasma without RF breakdown. RF coupling studies show optimal coupling (R less than or equal to 10%) when the local density at the waveguide mouth is 25 to 50 times overdense. Initial heating experiments show an ion tail formation in hydrogen discharge peaking at a density of anti n approx. = 2.7 x 1014 cm−3 at B = 8.9 T, and bulk ion heating at a density of anti n approx. = 1.5 x 1014 c−3 at B approx. = 11 T. Evidence of RF current enhancement has been observed at a density of n approx. = 3 x 1013 cm−3. In the Versator II tokamak initial ion heating studies have been carried out using an 800 MHz, 140 kW klystron. With 50 kW of net RF power injected through a 4 waveguide grill at B = 1.3 T and anti n = 2.5 x 1013 cm−3, Doppler broadening of the OVII and NVI lines shows a .delta.T/sub i/ = 50 eV rise in the bulk ion temperature. A significant RF produced ion tail is also observed by charge exchange analysis. We have succeeded in combining a toroidal ray-tracing code and a 1-D transport code to study the heating density bands and heating efficiencies.
Scientific and Technical Aerospace Reports
Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 308
Book Description
Generation of RF Driven Currents by Lower-hybrid Wave Injection in the Versator II Tokamak
Author: S. C. LuckhardtPublisher:
ISBN:
Category :
Languages : en
Pages : 18
Book Description
Lower Hybrid Fast Wave Current Drive Experiments on the Versator II Tokamak
Author: Jesus Noel Samonte VillaseñorPublisher:
ISBN:
Category :
Languages : en
Pages : 344
Book Description
Polarization Studies in Electron Cyclotron Heating Experiments on the Versator II Tokamak
Author: JAYCOR ALEXANDRIA VA.Publisher:
ISBN:
Category :
Languages : en
Pages : 24
Book Description
Preliminary results of the ECH experiment using the MIT Versator II with polarized microwave radiation were obtained. Decreases in both loop voltage and line average plasma density were measured as a function of power and toroidal angle of microwave beam injection. Thompson scattering measurements indicate an increase in the central electron temperature. These investigations showed a distinct asymmetry behavior for both polarizations.
American Doctoral Dissertations
Author: Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 696
Book Description
