SAE AIR 6219:2018 pdf free

SAE AIR 6219:2018 pdf free.Development of Atmospheric Neutron Single Event Effects Analysis for Use in Safety Assessments
Galactic cosmic rays and solar rays penetrate the earth’s atmosphere and produce particle cascades. The atmospheric radiation is comprised mainly of high energy neutrons that can interact with a semiconductor device’s silicon structure causing adverse behavior.
This document describes an example process to evaluate the effects of atmospheric radiation at the equipment level, based on effects on electronic circuits. Additional atmospheric radiation information can be found in other industry documents including the IEC 62396 series. This AIR is intended to support a safety analysis; there may be other uses for this SEE analysis, but these are not specifically addressed in the document. The document is not intended to define specific data formats or organizational responsibilities. There may be other acceptable approaches to supporting SEE analyses within safety assessments.
NOTE: This document only addresses the activities that are used for equipment level SEE considerations. Benefit from system level mitigation may be used during the system safety assessment process (ARP4761/ED135). For the purposes of this document, equipment is defined as any self-contained assembly composed of one or several hardware and software items that perform a distinctive function necessary to the operation of the system.  High energy primary cosmic rays continuously arrive at the Earth and interact with atoms in the Earth’s atmosphere creating secondary high energy particles. Of the various secondary particles created, high energy neutrons have been shown to be the main cause of SEE in electronic aircraft devices, as reported since the early 1990s. Single Event Upsets (SEU) are one type of SEE. SEE cover a range of effect types which are all caused by a single energetic particle. The different types of SEE are described in Table 1. A full discussion of the atmospheric radiation environment is covered in detail in IEC 62396-1. SAE AIR 6219 pdf free download.