TY - RPRT TI - Theory of the thermionic current beyond the traditional space charge limit enabled by trapped ions in the virtual cathode AU - Idema, Zacharay L. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] AU - Campanell, Michael D. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000288402762) PY - 2026 DO - 10.1063/5.0335982 UR - https://www.osti.gov/biblio/3389385 ID - 3389385 ER -