# Published Data

### 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.

### Publication Figures

Publication Date:

2016-07-21

First Author:

Roy McAdams

Title:

Negative ion research at the Culham Centre for Fusion (CCFE)

Paper Identifier:

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Use the Download buttons to download information on each listed figure, e.g. the image file and how it was created

Figure Reference | Title | Description | Number of Figure Data Items | Identifier | Download Figure Details | ||
---|---|---|---|---|---|---|---|

Figure 1 | SNIF – Figure 1 | Schematic of the SNIF source and accelerator | 0 | CF/16/322 | Download | ||

Fugure 2 Beam currents at 25kV with 0V and 20V bias insert bias voltage and a gas flow | Beam currents at 25kV with 0V and 20V bias insert bias voltage and a gas flow – Figure 2 | 0 | CF/16/324 | Download | |||

Figure 3 Co-extracted electron current at 25kV and a gas flow rate of 10 sccm | Co-extracted electron current at 25kV and a gas flow rate of 10 sccm – Figure 3 | Co-extracted electron current at 25kV and a gas flow rate of 10 sccm | 0 | CF/16/325 | Download | ||

Figure 4 Calculated line ratios for the coronal model | Calculated line ratios for the coronal model – Figure 4 | The calculated line ratios of various Balmer Series lines are plotted versus electron temperature using the coronal model. | 0 | CF/16/326 | Download | ||

Figure 5 Measured electron temperatures at different source gas flow rates for an RF power of 2kW and 0V bias using the different line ratios | Measured electron temperatures at different source gas flow rates for an RF power of 2kW and 0V bias using the different line ratios – Figure 5 | Calculated electron temperature versus ion source gas flow rate for different line intensity ratios. Calculated using coronal model. | 0 | CF/16/327 | Download | ||

Figure 6 The energy cost to create a single electron-ion pair in atomic or molecular hydrogen | The energy cost to create a single electron-ion pair in atomic or molecular hydrogen – Figure 6 | The energy cost of producing an electron-ion pair in atomic or molecular hydrogen. The data was taken from reference 36 by Hjartarsen et al. data from their figure was digitised. | 0 | CF/16/328 | Download | ||

Figure 7 SNIF magnetic field present in the source measured along the central beam axis with a double Gaussian fit | SNIF magnetic field present in the source measured along the central beam axis with a double Gaussian fit – Figure 7 | Plot of magnetic field through the ion source of SNIF. Fitted with a double Gaussian. | 0 | CF/16/329 | Download | ||

Figure 8 Model output of the SNIF plasma density along the central source axis at 10sccm gas flow and RF power 2000, 3000, 4000 and 5000W | Model output of the SNIF plasma density along the central source axis at 10sccm gas flow and RF power 2000, 3000, 4000 and 5000W – Figure 8 | Plot of results from 1D fluid model of plasma density through SNIF ion source at different RF powers for 10sccm gas flow rate. | 0 | CF/16/330 | Download | ||

Figure 9 | Model output of the SNIF plasma temperature along the central source axis at 10sccm gas flow and RF power 2000, 3000, 4000 and 5000W.. Figure 9 | Plot of results from 1D fluid model of plasma density through SNIF ion source at different RF powers for 10sccm gas flow rate. | 0 | CF/16/331 | Download | ||

Figure 10 | Model output of the SNIF plasma potential along the central source axis at 10sccm gas flow and RF power 2000, 3000, 4000 and 5000W – Figure 10 | Plot of results from 1D fluid model of plasma density through SNIF ion source at different RF powers for 10sccm gas flow rate. | 0 | CF/16/332 | Download | ||

Figure 11 | SNIF extracted beam current against RF power data and model output at 10sccm gas flow – Figure 11 | SNIF extracted beam current against RF power data and model output at 10sccm gas flow | 0 | CF/16/333 | Download | ||

Figure 12 | The electron temperature from SNIF estimated using the coronal method as a function of RF power and model output at 10sccm gas flow – Figure 12 | Plot of results from fit of line ratios to coronal model to obtain electron temperature. | 0 | CF/16/334 | Download | ||

Electrical efficiency as a function of beam divergence for the three neutraliser options – Figure 13 | Electrical efficiency of NBI system as a function of beam divergence for the three neutraliser options. | 0 | CF/16/335 | Download | |||

Figure 14 | Effect of stripping losses and energy recovery for the three neutralisers -Figure 14 | Effect of stripping losses and energy recovery for the three neutralisers all at 1.MeV and 5mrad divergence. Gas neutraliser efficiency 58%, plasma neutraliser efficiency 80% and photo-neutraliser efficiency 90%. | 0 | CF/16/336 | Download | ||

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