# 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:

2019-08-22

First Author:

I. Turner

Title:

Ion source backplate loading due to backstreaming electrons in the JET EP2 neutral beam injectors

Paper Identifier:

Search the list of Figures using keywords (case insensitive):

To drill down to information on Data within a published figure, select a table cell where the figure's number of Data Items > 0

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 | Figure 1 – backplate paper | Plots showing (a) The extracted ion beam power, (b) neutron rates and (c) the ratio of neutron rates for two PINIs (4.1 and 4.4) at the different neutraliser gas flow rates for two JET pulses with different neutraliser gas flow rates: #92250 (20 mbar l/s) and #92247 (30 mbar l/s). | 0 | CF/20/47 | Download | ||

Figure 2 | Figure 2 – backplate paper | Plot showing electrical waveforms - (a) arc discharge and (b) beam extraction waveforms for a 100 kV, 40A pulse. | 0 | CF/20/48 | Download | ||

Figure 3 | Figure 3 backplate paper | Plot showing backplate cooling water thermocouple response during a 3.5 s beam pulse. | 0 | CF/20/49 | Download | ||

Figure 4 | Figure 4 – backplate paper | Plot showing typical measured backplate energies for a 100 kV, 40A beam. | 0 | CF/20/50 | Download | ||

Figure 5 | Figure 5 – backplate paper | AXCEL plot of the EP2 triode accelerator for a 125 kV, 60A deuterium beam. Axcel is a program for determining electric fields in elecrostatic particle accelerators. | 0 | CF/20/51 | Download | ||

Figure 6 | Figure 6 – backplate paper | Diagram showing modelled trajectories of D2+ ions originating in the neutraliser region. | 0 | CF/20/52 | Download | ||

Figure 7 | Figure 7 – backplate paper | Diagram showing modelled cecondary electron trajectories for electrons launched at 10eV with random velocity vectors w.r.t the G3 surface. Red markers indicate the launch area (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article). | 0 | CF/20/53 | Download | ||

Figure 8 | Figure 8 – backplate paper | Image showing The initial velocity distribution for the backstreaming electrons at Grid 1. | 0 | CF/20/54 | Download | ||

Figure 9 | Figure 9 – backplate paper | Magnetic field colour maps of the magnetic field components of the ion source magnets at the backplate; (a) Bx, (b) By), (c) Bz, (d) B total. The "+" symbols represent the positions of the extraction apertures. | 0 | CF/20/55 | Download | ||

Figure 10 | Figure 10 – backplate paper | Image showing the power distribution (in Watts) of the backstreaming electrons on the backplate for one half of the extraction apertures. | 0 | CF/20/56 | Download | ||

Figure 11 | Figure 11 – backplate paper | Plot showing backplate power loadings for an ion source gas flow rate of 12 mbar l/s and a neutraliser gas flow rate of 20 mbar l/s. | 0 | CF/20/57 | Download | ||

Figure 12 | Figure 12 – backplate paper | Plot showing source body and G1 combined power loadings for an ion source gas flow rate of 12 mbar l/s and a neutraliser gas flow rate of 20 mbar l/s. | 0 | CF/20/58 | Download | ||

Figure 13 | Figure 13 – backplate paper | Plot showing backplate loading due to backstreaming electrons and the arc as the neutraliser gas flow rate is varied for an ion source gas flow rate of 12 mbar l/s. | 0 | CF/20/59 | Download | ||

Figure 14 | Figure 14 – backplate paper | Plot showing backplate power loadings for a grid gas flow rate of 30 mbar l/s. | 0 | CF/20/60 | Download | ||

Figure 15 | Figure 15 – backplate paper | Plot showing backplate loading due to backstreaming electrons and the arc as the grid gas flow rate is varied. | 0 | CF/20/61 | Download | ||

Figure 16 | Figure 16 – backplate paper | Plot showing comparison of backplate loading due to backstreaming electrons for normal and grid gas operation. The loading is plotted against total gas flow rate to the ion source and neutralizer. | 0 | CF/20/62 | Download | ||

Figure 17 | Figure 17 – backplate paper | Plot showing backplate loading due to the arc at 5.3MW extracted power together with normalisation to the actual arc discharge power. | 0 | CF/20/63 | Download | ||

Loading... please wait...