Speaker
Description
The LANSCE H- Ion Source has recently been studied with laser absorption and optical emission spectroscopy diagnostics capable of measuring the in-situ cesium density and temperature, the neutral hydrogen temperature and the $H_{\alpha,\beta,\gamma}$ emission lines. These diagnostics have been installed on the LANSCE production sources for the 2026 run, which presents the first opportunity to see long term trends over multiple sources. Cesium density monitoring will provide data to optimize the Cs conditioning and initial operation of the source, and the Cesium temperature can be used for model validations. The neutral hydrogen temperature and OES measurements will be used to optimize the beam emittance and plasma properties of the source. Comparison of these laser and OES diagnostic parameters with source performance such as beam current, emittance, stability, and lifetime will be presented.
Finally, new diagnostic avenues are being explored, such as the H- Density measurement using Cavity-Ring-Down-Spectroscopy and design of a high-speed laser diagnostic to measure the converter work function in between beam phase pulses. The status of these diagnostics will be presented.
| Email address | kleinjan@lanl.gov |
|---|---|
| Visitor's Visa | no |
| Classification | Plasma and negative ion diagnostics |
| Footnote | This talk may be more appropriate under "H- and D- sources for fusion, accelerators and other applications" |