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These pages provide an access point to data contained in CCFE published journal papers.  By selecting a paper, and then a specific figure or table, you can request the related underlying data if it is available for release.

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Publication Figures

Publication Date:
2015-10-02

First Author:
Scott Allan

Title:
Ion Temperature Measurements of L-mode Filaments in MAST by Retarding Field Energy Analyser

Paper Identifier:
CP/15/392

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Figure Reference Title Description Number of Figure Data Items Identifier Download Figure Details
Figure 1 RFEA L mode Filament Paper. Figure 1. Figure 1. (a) Plasma current, (b) line averaged electron density and (c) the typical distance of the midplane RFEA inlet aperture from the separatrix for the shots used in this work. 4 CF/15/393 Download
Figure 2 RFEA L mode Filament Paper. Figure 2. Figure 2. (a) Schematic of the RFEA grid arrangement and (b) typical voltage settings measured with respect to torus ground. 0 CF/15/394 Download
Figure 3 RFEA L mode Filament Paper. Figure 3. Figure 3. Midplane RFEA signals. (a) Slit plate (SP) and grid 1 (G1) voltage. (b) Slit plate current. The green dashed line shows the mean value and the blue dashed line shows the filament detection threshold of the mean plus two standard deviations. (c) Collector current. Detected filaments are shown in (b) and (c) with orange circles. 0 CF/15/395 Download
Figure 4 RFEA L mode Filament Paper. Figure 4. Figure 4. Slit plate and collector current density traces for a typical filament. 0 CF/15/396 Download
Figure 5 RFEA L mode Filament Paper. Figure 5. Figure 5. A typical graph of normalised ion current versus grid 1 voltage for filaments in a low density Ip=0.6MA discharge at a distance from 0 to 1cm from the separatrix. The red diamonds were obtained by binning the raw data into containers of approximately 10V width. The green line was fitted to the binned data using equation (2) in the paper and resulted in the fitting parameters shown on the graph. 0 CF/15/397 Download
Figure 6 RFEA L mode Filament Paper. Figure 6. Figure 6. Assessing the effects of using an average grid 1 voltage value on the fitted Ti.The black squares show simulated raw data obtained using equation (2) with a 10eV ion temperature. The red circles show data obtained by averaging the raw data over 25V. The blue diamonds were obtained by binning the averaged data in bins of 10V width. The green triangles were obtained by fitting the binned data using equation (2) in the paper and gave a Ti of 10.4± 0.4eV. 0 CF/15/398 Download
Figure 7 RFEA L mode Filament Paper. Figure 7. Figure 7. Area under slit plate peaks during filaments as a function of distance from the separatrix (rsep). Filament data was taken from a low (29464) and high (29469) density, Ip=0.6MA L-mode shot. Exponential fitting of the binned data gave decay lengths of lambda near = 6 ± 2mm and lambda far = 21 ± 5mm for the low density shot and lambda near = 11 ± 5mm and lambda far = 54 ± 15mm for the high density shot. 0 CF/15/399 Download
Figure 8 RFEA L mode Filament Paper. Figure 8. Figure 8. Comparison of ion (Ti) and electron (Te) temperatures during large filaments in two repeat low density L-mode shots (29464 and 29465). 0 CF/15/400 Download
Figure 9 RFEA L mode Filament Paper. Figure 9. Figure 9. Comparison of background (BG) ion (Ti) and electron (Te) temperatures with large filament ion temperatures in two repeat low density L-mode shots (29464 and 29465). 0 CF/15/407 Download
Figure 10 RFEA L mode Filament Paper. Figure 10. Figure 10. Comparison of ion (Ti) and electron (Te) temperatures during large filaments in high density L-mode shots (29469, 29500 and 29489). 0 CF/15/408 Download
Figure 11 RFEA L mode Filament Paper. Figure 11. Figure 11. Comparison of background (BG) and large filament ion temperatures in high density L-mode shots 29469 (Ip=0.6MA) and 29500 (Ip=0.4MA) and 29489 (Ip=0.4MA and B=0.4T). 0 CF/15/409 Download
Figure 12 RFEA L mode Filament Paper. Figure 12. Figure 12. Low density measurements of large filament and background Ti measured by the target RFEA, mapped to the midplane. (shot 30357). 0 CF/15/410 Download
Figure 13 RFEA L mode Filament Paper. Figure 13. Figure 13. High density measurements of large filament and background Ti measured by the target RFEA, mapped to the midplane. (shot 29500). 0 CF/15/411 Download

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