The heavy-ion species used for the SEE studies on this product
were provided and delivered by:
- Texas A&M University (TAMU) Cyclotron
Radiation Effects Facility using a K500 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 these
studies, ion flux of 1 × 105 ions/cm2 ·s was used to provide
heavy-ion fluences of 1 × 106 – 1 × 107 ions/cm2. The
TAMU facility uses a beam port that has a 1-mil Aramica window to allow in-air testing
while maintaining the vacuum within the particle accelerator. The in-air gap between the
device and the ion beam port window was maintained at 40mm for all runs.
For the experiments conducted on this
report, there was 1 ion used, 109Ag. 109Ag at an angle of 15 degrees
was used to obtain LETEFF of 51MeV×cm2/mg. The total kinetic energies
for each of the ions were:
109Ag = 1.634GeV
(15MeV/nucleon)
-
- Ion uniformity for these experiments was between 93% and
96%
Figure 4-1 shows the ADS1278QML-SP EVM in front of the beam line at the TAMU facility.