# 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:

2019-07-25

First Author:

I. Turner

Title:

An RF ion source model for H- Production without Caesium

Paper Identifier:

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

Figure 1 | Figure 1 – RF ion source model | (a) Schematic of the SNIF Ion source and accelerator. (b) Magnetic field from filter and accelerator magnets along the central beam axis in the source from the antenna window up to the end of the biased insert recess. | 0 | CF/20/29 | Download | ||

Figure 2 | Figure 2 – RF ion source model | Flow chart showing operation and data flow in the main code. | 0 | CF/20/30 | Download | ||

Figure 3 | Figure 3 – RF ion source model | Plot showing model output of plasma density (= nH- + ne) along the source central axis at 0.6 Pa source pressure and 2000 W, 3000W and 4000W RF power. | 0 | CF/20/31 | Download | ||

Figure 4 | Figure 4 – RF ion source model | Plot showing model output of electron temperature along the source central axis at 0.6 Pa source pressure and 2000 W, 3000W and 4000W RF power. Note that Te and TH- are assumed equal whereas Ti (positive ion temperature) is assumed to be equal to the gas temperature and applies to the three species. | 0 | CF/20/32 | Download | ||

Figure 5 | Figure 5 – RF ion source model | Plot showing model output of plasma potential along the source central axis at 0.6 Pa source pressure and 2000 W, 3000W and 4000W RF power. | 0 | CF/20/33 | Download | ||

Figure 6 | Figure 6 – RF ion source model | Plot showing model output of total positive ion density n+, negative ion density n? and electron density ne along the source central axis at 0.6 Pa source pressure and 3000W RF power. | 0 | CF/20/34 | Download | ||

Figure 7 | Figure 7 – RF ion source model | Plot showing model output of the positive species fluxes in the z-direction towards the plasma grid at 0.6 Pa source pressure and 3000W RF power. | 0 | CF/20/35 | Download | ||

Figure 8 | Figure 8 – RF ion source model | Plot showing results from the model compared with data from SNIF at 0.6 Pa source pressure and varying RF power for extracted beam current (H? ion current). | 0 | CF/20/36 | Download | ||

Figure 9 | Figure 9 – RF ion source model | Plot showing results from the model compared with data from SNIF at 0.6 Pa source pressure and varying RF power for extracted electron current. Note that there are error bars present on the plot but the only source of error here is the grid 2 power supply precision and therefore the error bars are too small to be clearly visible. | 0 | CF/20/37 | Download | ||

Figure 10 | Figure 10 – RF ion source model | Figure 10 results from the model compared with data from SNIF at 0.6 Pa source pressure and varying RF power for electron temperature. | 0 | CF/20/38 | Download | ||

Figure 11 | Figure 11 – RF ion source model | Plot showing results from the model compared with data from SNIF at 0.6 Pa source pressure and varying RF power for negative ion to electron density ratio. | 0 | CF/20/39 | Download | ||

Figure 12 | Figure 12 – RF ion source model | Plot showing results from the model compared with data from SNIF at 0.6 Pa source pressure and varying RF power for the ratios of H+ and H3+ densities to total positive particle density. | 0 | CF/20/40 | Download | ||

Figure 13 | Figure 13 – RF ion source model | Plot showing results from the model compared with data from SNIF at 2000W RF power and varying source pressure for electron temperature. | 0 | CF/20/41 | Download | ||

Figure 14 | Figure 14 – RF ion source model | Plot showing results from the model compared with data from SNIF at 2000W RF power and varying source pressure for the ratios of H+ and H3+ densities to total positive particle density. | 0 | CF/20/42 | Download | ||

Figure 15 | Figure 15 – RF ion source model | Plot showing model output compared with SNIF data showing the effects of the bias power supply on negative ion attenuation for a fixed source pressure of 0.6 Pa and varying RF power. | 0 | CF/20/43 | Download | ||

Figure 16 – RF ion source model | Plot showing model output compared with SNIF data showing the effects of the bias power supply on electron attenuation for a fixed source pressure of 0.6 Pa and varying RF power. Note that there are error bars present on the plot but the only source of error here is the grid 2 power supply precision and therefore the error bars are too small to be clearly visible. | 0 | CF/20/44 | Download | |||

Figure 17 | Figure 17 – RF ion source model | Plot showing model outputs of electron current density at the plasma grid and after extraction with source pressure (bias insert voltage =0V). | 0 | CF/20/45 | Download | ||

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