MeVVA system overview.
Photograph of the rack mounted control electronics with the side rf covers removed.
Optically controlled trigger generator circuit.
Oscilloscope traces obtained during the bench tests of the MeVVA system. (a) The arc current recorded by the Pearson coil. (b) The current recorded by the unbiased Faraday cup. (c) The integral of the unbiased Faraday cup current representing the accumulated charge detected. The total charge is equivalent to assuming singly charged ions.
Overview of the MeVVA head and rf enclosure. Dimensions in millimeters.
Photographs of the MeVVA head (top) and the extractor grid (bottom).
Photographs of the MeVVA anode grid, anode insulator, and cathode samples.
Photographs of the MeVVA head attached to the alignment fixture.
The bench test setup (top) and the electrode spacing diagram (bottom).
Photograph of the MeVVA installed on the NIST EBIT.
X-ray spectra, recorded by a silicon lithium (SiLi) detector in units of counts per second (cps), from the drift tube region of the NIST EBIT while operating the MeVVA at and with bias. The cathodes and total count rates were (A) tungsten and , (B) titanium and , and (C) iron and .
Article metrics loading...
Full text loading...