ELISE achieves target values for °ÄÃÅÁùºÏ²Ê¸ßÊÖ
The Max Planck Institute for Plasma Physics, in Garching, Germany, is the location of the ELISE (Extraction from a Large Ion Source Experiment) test stand, a key experiment in the development of the °ÄÃÅÁùºÏ²Ê¸ßÊÖ neutral beam source, supporting the research of NBTF. ELISE has operated a half-size °ÄÃÅÁùºÏ²Ê¸ßÊÖ beam source since 2013, allowing modifications and experience to be passed to the NBTF and finally to the °ÄÃÅÁùºÏ²Ê¸ßÊÖ heating neutral beams.
Recent experiments at ELISE have focused on extending the pulse length for hydrogen beams, looking for a high but steady H- current, and stable and low co-extracted electron current. Caesium evaporation, the key technique, is used both to enhance the negative ion production and to reduce the co-extracted electron current to acceptable levels (< 0.5 x jH- with H, or < 1 x jD- with D). How to achieve the optimum caesiation distribution has been a topic of research for some time.
The experiments at ELISE have now produced the of achieving the required current density in hydrogen for the first time (330 A/m2) over short pulses (<10 s), with nearly 90% of the target reached over a 600 s pulse.
See the press release issued by the Max Planck Institute for Plasma Physics in or .