DBS

Contacts: Quinn Pratt

Short Description

Analysis of data from the DIII-D Multi-Channel Doppler Back-Scattering (DBS) Diagnostic

Keywords

DBS, Flow Velocity, Turbulence

Long Description

The OMFIT - DBS module has been developed as an integrated approach to visualizing and analyzing data from the DIII-D Multi-Channel Doppler Back-Scattering (DBS) diagnostic. Data from both V-band systems (one at the 60-deg port, another at the 240-port) and the W-band system at the 240-port can be used in analysis. Analysis over ranges of times is a primary feature of this module. DBS quadrature spectrum fitting is used for Doppler shift calculation. Ray tracing (GENRAY) is used to calculate scattering parameters. DBS outputs include: scattering wavenumbers, turbulent flow velocity, radial electric field, omega_E, turbulent dimensionless parameter k-theta * rho-s.

Typical workflows

• Fetch raw DBS data

• DBS spectrum analysis and visualization

• Doppler shift calculation from the DBS quadrature spectrum

• GENRAY setup with EFIT and Profiles

• Run GENRAY with DBS parameters

• Calculate derived quantities and plot

Supported devices

• DIII-D

Tutorials

• Google docs tutorial

Classes

• classes.omfit_base.OMFITcollection()

• classes.omfit_genray.OMFITgenray()

• classes.omfit_idlSav.OMFITidlSav()

• classes.omfit_mds.OMFITmdsValue()

• classes.omfit_mds.OMFITmds()

• classes.omfit_profiles.OMFITprofiles()

Contributors

List of contributors sorted by number of lines authored:

9380 Quinn Pratt
 177 Orso Meneghini

Submodules

None

Users

List of usernames sorted by number of module imports: ashourvana, smithsp, hongrongjie, prattq, kobayashi, fernandezp, krietedm, yuguanying