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Radiation Hardening of Electronic Components

The University of Utah has a well-characterized irradiator for unbiased and real-time irradiation of electronic components. Neutron fluence delivered is determined using either sulfur pellets (ASTM E 265) or nickel foils (ASTM E 264). Range of Fluences calibrated are from 1E10 to 2.5E14 (15-30,000 W hours). Power level is used to minimize errors due to ramp rate. Neutron Energy Spectrum fluence is reported in terms of 1 MeV equivalent for Si (ASTM E 722). The electrostatic discharge control program follows ANSI/ESD S20.20-1999 and MIL-STD1686. Isofluence contours are determined yearly and after any core loading changes. The gamma component of the exposure is kept to a minimum by a lead shield located in the stand, and low burn-up fuel.


Neutron Fluence Map of our Fast Neutron Irradiator Facility (FNIF)
Shown is the core-facing map of the FNIF with a sample placement area of 6"x 11".
Locations are marked for common neutron and gamma dosimetry positions.

Isolines represent fraction of 100% neutron fluence

Loading Lego® Parts with Neutron and Gamma Dosimetry

Parts and Dosimetry Loading for Radiation Analysis

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