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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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NASA Electronic Parts Assurance Group (NEPAG): Preliminary ESD Investigation of Commercial GaN HEMT
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The State of NEPP NASA Electronic Parts & Packaging Program
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Electronic Parts and Electrostatic Discharge: Gaps and Mitigation Strategies: Lessons Learned
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The State of NEPP NASA Electronic Parts & Packaging Program
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Investigations of electron interactions with matter. Part 1 - Bremsstrahlung production in aluminum and iron. Part 2 - Electron scattering in aluminum
Bremsstrahlung production in aluminum and iron - electron scattering in aluminum
Electrical, Electronic and Electromechanical (EEE) Parts for Spaceflight Applications: A NASA Electronic Parts and Packaging Historical Perspective
This presentation provides a brief NASA-perspective of the major historical milestones in the development of space quality electrical, electronic, and electromechanical (EEE) components in the USA from the dawn of the space age through present.
Electrical, Electronic and Electromechanical (EEE) Parts for Spaceflight Applications: A NASA Electronic Parts and Packaging Historical Perspective
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NASA Parts Selection List (NPSL) WWW Site http://nepp.nasa.gov/npsl
The NASA Parts Selection List (NPSL) is an on-line resource for electronic parts selection tailored for use by spaceflight projects. The NPSL provides a list of commonly used electronic parts that have a history of satisfactory use in spaceflight applications. The objective of this www site is to provide NASA projects, contractors, university experimenters, et al with an easy to use resource that provides a baseline of electronic parts from which designers are encouraged to select. The NPSL is an ongoing resource produced by Code 562 in support of the NASA HQ funded NASA Electronic Parts and Packaging (NEPP) Program. The NPSL is produced as an electronic format deliverable made available via the referenced www site administered by Code 562. The NPSL does not provide information pertaining to patented or proprietary information. All of the information contained in the NPSL is available through various other public domain resources such as US Military procurement specifications for electronic parts, NASA GSFC's Preferred Parts List (PPL-21), and NASA's Standard Parts List (MIL-STD975).
Active and Passive Supplier Assessment Program (ASAP & PSAP) WWW Sites http://nepp.nasa.gov/imd/asap http://nepp.nasa.gov/imd/psap
The Active and Passive Supplier Assessment Programs (ASAP and PSAP) WWW Sites provide general information to the electronic parts community regarding the availability of electronic parts. They also provide information to NASA regarding modifications to commonly used procurement specifications and test methods. The ASAP and PSAP www sites are ongoing resources produced by Code 562 in support of the NASA HQ funded NASA Electronic Parts and Packaging (NEPP) Program. These WWW sites do not provide information pertaining to patented or proprietary information. All of the information contained in these www sites is available through various other public domain resources such as US Military Qualified Producers Listings (QPLs) and Qualified Manufacturer Listings (QMLs) and industry working groups such as the Electronics Industry Alliance (EIA) and the Space Parts Working Group (SPWG).
Calculations of longitude dependence of geomagnetically trpped electron fluxes. part i- the general fokker-planck equation for electron diffusion
General Fokker-Planck equation for geomagnetically trapped electron distribution as function of longitude, time, energy, and mirror point field intensity
Long life assurance study for manned spacecraft long life hardware. Volume 4: Special long life assurance studies
Guidelines for the selection of equipment to be used for manned spacecraft in order to assure a five year maintenance-free service life were developed. A special study was conducted to determine the adequacy of the procedures used to determine the quality and effectiveness of various components. The subjects examined are: (1) temperature cycling for acceptance of electronic assemblies; (2) accelerated testing techniques; (3) electronic part screening techniques; (4) electronic part derating practices; (5) vibration life extension of printed circuit board assemblies; and (6) tolerance funnelling and test requirements.
Connecting Mission Profiles and Radiation Vulnerability Assessment
Radiation vulnerability assessment early in spacecraft development is cheaper and faster than in late development phases. RGENTIC and SEAM are two software platforms that can be coupled to provide this type of early assessment. Specifically, RGENTIC is a tool that outputs descriptions of radiation risks based on a selected mission environment and the system’s electronic part portfolio, while SEAM models how radiation-induced faults in electronic parts propagate through a system. In this work, we propose a spacecraft evaluation flow where RGENTIC’s outputs, which are radiation vulnerabilities of electronic parts for a given mission, become inputs to SEAM, resulting in an automatic part-type template palette presented to users so that they can easily begin modeling the occurrence and propagation of radiation-induced faults in their spacecraft. In this context, fault propagation modeling shows how radiation effects impact the spacecraft’s electronics.
MIL/JEDEC Standards Update
MIL/JEDEC standards play a vital role in electronic parts procurement and usage on all NASA missions. Through the NASA Electronic Parts Assurance Group (NEPAG) Program, NASA is an active participant in work related to the standards as they apply to electronic parts. This paper will provide an update on those activities.