Speaker
Description
We report on adding a muti-wavelength emission and absorption diagnostic to the Los Alamos Neutron Science Center (LANSCE) H− ion source, a filament/arc driven, multi-cusp, surface conversion system. In this work we are better quantifying our runtime and source recycle processes. The LANSCE source is used in repeated four-week run cycles during the annual six-month run period. Here, we test the hypothesis that real-time monitoring of the plasma temperature and cesium density will provide feedback information to increase run cycle time, optimize H− current, and monitor the source’s health. We have installed system with fiber transport for monitoring the Hα Balmer line absorption strength of excited state hydrogen at 656 nm and the D2 absorption line of cesium at 852 nm. Our measurement and fiber transport to/from the active source provides a nonintrusive method for extracting data from the source’s 750 kV high voltage environment. Collection of TLDS absorption and emission lines from excited states are incorporated into the data collection scheme with a series of narrow-band dichroic mirrors. Our design of a sweeping TLDS allows for collection of emission and absorption data within the same sub-millisecond plasma arc pulse, and the combination of these measurements allows us to monitor the generating hydrogen plasma temperature and cesium density during ion source conditioning and operations.
Funding Agency
Los Alamos National Laboratory, Laboratory Directed Research and Development
| I have read and accept the Privacy Policy Statement | Yes |
|---|---|
| Please consider my poster for contributed oral presentation | No |
| Would you like to submit this poster in student poster session on Sunday (August 10th) | No |
