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Validating TRANSP simulations using neutron emission spectroscopy with dual sight lines.
C Hellesen1, E A Sundén, S Conroy
1VR, Uppsala University, SE-75120 Uppsala, Sweden. carl.hellesen@fysast.uu.se
The Review of Scientific Instruments
|December 11, 2008
Summary
A new method models neutron spectra from TRANSP simulations. Comparing modeled data with measurements from two spectrometers refines simulation parameters for better accuracy.
Area of Science:
- Nuclear Fusion Engineering
- Plasma Physics
- Neutron Spectroscopy
Background:
- Accurate modeling of neutron spectra is crucial for understanding fusion plasma behavior.
- The TRANSP code simulates bulk and fast ion distributions in fusion devices.
- Neutron emission measurements provide critical data for validating plasma models.
Purpose of the Study:
- To develop and validate a method for generating modeled neutron spectra from TRANSP simulations.
- To compare modeled neutron spectra with experimental data from multiple neutron spectrometers.
- To enhance the accuracy of TRANSP simulations by incorporating experimental constraints.
Main Methods:
- Generating modeled neutron spectra using TRANSP simulations of ion distributions.
- Utilizing data from two neutron spectrometers: TOFOR (radial line of sight) and MPRu (tangential line of sight).
- Analyzing measured neutron spectra to extract information on emission from different ion populations.
Main Results:
- Successful generation of modeled neutron spectra based on TRANSP simulations.
- Comparison of modeled spectra with experimental data from TOFOR and MPRu.
- Identification of discrepancies and constraints for improving TRANSP simulation parameters.
Conclusions:
- The developed method provides a valuable tool for validating fusion plasma simulations.
- Experimental neutron spectra data can effectively constrain and refine TRANSP simulation parameters.
- Improved simulations lead to a better understanding of fusion plasma physics and performance.
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