Gamma induced dose fluctuations in a charge injection device

Section: ) Worst Case Eventsmentioning

confidence: 99%

Near-Earth Space Radiation Models

Xapsos

O’Neill

O’Brien

2013

“…Knowing the three moment ratios, the specific dose of the electron component can be evaluated using equation (9). Inserting the calculated value of z, into equation (2) and setting z, = 0 gives the contribution of the electron component to u / p .…”

Section: Electron Contribution To Dose Fluctuationsmentioning

confidence: 99%

The random nature of energy deposition in gate oxides

Xapsos

Freitag

Burke³

et al. 1989

Self Cite

AJBTRACT New data is presented on statistical fluctuations in energy deposition across individual gate oxides at 77 K for 13 to 63 MeV protons. A two component model based on microdosimetry theory has been developed to describe proton-induced dose fluctuations. The model considers random factors of the energy deposition process for ( 1 ) direct proton strikes within the volume of interest, and (2) secondary electrons originating outside and entering the volume of interest. Experiment and theory are in good agreement.

“…The formalism for describing the combination of random processes as it applies to radiation induced ionization effects in sensors has been developed by Burke et al in [5,6]. Presented here is the first application of the theory to displacement damage fluctuations.…”

Section: A Introductionmentioning

confidence: 98%

The generation lifetime damage factor and its variance in silicon

Dale

Marshall

Burke³

et al. 1989

Self Cite

The generation damage factor and its variance for silicon are determined for proton energies of 12, 22, and 63 MeV, and for fission neutrons. Measurement of the variance is made for the first time using 61,504 pixels of a charge injection device. The variance is an intrinsic characteristic of damage due in part to differences in numbers and magnitudes of atomic recoils produced in each pixel. New calculations of the variance due to the recoil spectrum show that the magnitude of the relative variance is determined by coulombic recoils. Indeed, the experimental relative variance is almost two orders of magnitude less for fission neutron induced dark current increases than for the proton case. Also, the relative variance was found to decrease as the proton energy was increased. The calculation shows that this trend is caused by the inelastic contribution to the relative variance of the recoil spectrum.