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 9.92
× 104 to 1.50 × 105 ions/cm2 ·s was used to
provide heavy-ion fluences of 1.00 × 107 ions/cm2. The
TAMU facility uses a beam port that has a 1mil 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.
- Michigan State University (MSU) Facility for Rare
Isotope Beams (FRIB) using a K500 superconducting cyclotron (KSEE) and an
advanced electron cyclotron resonance (ECR) ion source. At the fluxes used, ion
beams had good flux stability and high irradiation uniformity as the beam is
collimated to a maximum of 40mm × 40mm square cross-sectional area for the
in-air and vacuum scintillators. Uniformity is achieved by scattering on a Cu
foil and then performing magnetic defocusing. The flux of the beam is regulated
over a broad range spanning several orders of magnitude. For these studies, ion
flux of 7.46 × 104 to 1.15 × 105 ions/cm2 ·s
was used to provide heavy-ion fluences of 1.00 × 107
ions/cm2. The KSEE facility uses a beam port that has a 3-mil
polyethylene naphthalate (PEN) 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 60mm for all runs.
For the experiments conducted on this report, there were 2 ions used, 109Ag (TAMU) and
109Ag (KSEE). Both ions were used to obtain LETEFF of
48MeV·cm2/mg. The total kinetic energies for each of the ions
were:
- 109Ag (TAMU) = 1.635GeV (15MeV/nucleon)
- Ion uniformity for these
experiments was between 95% and 97%
- 109Ag (KSEE) = 2.125GeV (19.5MeV/nucleon)
- Ion uniformity for these
experiments was 91%
Figure 4-1 shows the TPS7H3014EVM in front of the beam line at the TAMU facility.