4 Irradiation Facility and Setup

The heavy-ion species used for the SEE studies on this product were provided and delivered by the TAMU 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 1in 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 10⁵ ions / cm² * s were used to provide heavy-ion fluences of approximately 10⁷ ions / cm² for SEL testing and ion flux of 10⁴ ions / cm² * s were used to provide heavy-ion fluences of approximately 10⁶ ions / cm² for SET testing.

For the experiments conducted on this report, ¹⁰⁹Ag ions at angle of incidence of 0° for an LET_EFF of 43MeV × cm² / mg were used. The total kinetic energy of ¹⁰⁹Ag in the vacuum is 1.634GeV (15 MeV/nucleon). Ion uniformity for these experiments was between 93% and 97%.

Figure 4-1 shows one of the TMUX582F-SEP test boards used for experiments at the TAMU Cyclotron Radiation Effects Facility. The in-air gap between the device and the ion beam port window was maintained at 40mm for all runs.

Figure 4-1 TMUX582F-SEP Evaluation Board at the TAMU Cyclotron Radiation Effects Facility