✦ LIBER ✦
Validation of collisional radiative modelling of emission line ratios for helium beam plasma diagnostic
✍ Scribed by S.M. Collis; R. Dall; J. Howard; D. Andruczyk; B.W. James
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 627 KB
- Volume
- 110
- Category
- Article
- ISSN
- 0022-4073
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✦ Synopsis
A time-dependent collisional radiation model has been used to validate the use of a pulsed helium beam to measure electron temperature profiles in the H-1NF flexible heliac. The diagnostics technique is based on the measurement of helium spectral line ratios which are a strong function of electron temperature while being a weak function of electron density. The validation procedure involves comparing measured and calculated emissivities of spectral lines emitted by helium atoms as a function of position in the beam.