4 Irradiation Facility and Setup

The heavy-ion species used for the SEE studies on this product were provided and delivered by the MSU Cyclotron Radiation Effects Facility using a superconducting cyclotron and an advanced electron cyclotron resonance (ECR) ion source. At the fluxes used, ion beams had good flux stability and high irradiation uniformity over a 1-in diameter circular cross-sectional area for the in-air station. Uniformity is achieved by magnetic defocusing. The flux of the beam is regulated over a broad range spanning several orders of magnitude. For this study, ion flux of 1 × 10⁵ ions/cm²-s were used to provide heavy-ion fluences of approximately 1 × 10⁷ ions/cm² for SEL testing. For the experiments conducted on this report, ¹⁰⁹Ag ions at angle of incidence of 0° for an LETEFF of 47MeV × cm²/mg were used. The total kinetic energy of ¹⁰⁹Ag in the vacuum is 2.125GeV (19.5 MeV/nucleon). Ion uniformity for these experiments was 91.88%.

Figure 4-1 shows one of the four TMUX182-SEP test boards used for experiments at the MSU facility. The in-air gap between the device and the ion beam port window was maintained at 50mm for all runs.

Figure 4-1 TMUX182-SEP Evaluation Board at the MSU Facility

Figure 4-2 TMUX182-SEP Thermal Image for SEL