Accession Number:

AD1040902

Title:

Design of Alpha Voltaic Power Source Using Americium 241 (241Am) and Diamond with a Power Density of 10 mW/cm3

Descriptive Note:

Technical Report,19 Jun 2017,25 Aug 2017

Corporate Author:

US Army Research Laboratory Adelphi United States

Report Date:

2017-10-19

Pagination or Media Count:

38.0

Abstract:

Long-lived isotope power sources can provide remotely located sensors and communications nodes with decades of power. Beta-voltaic power sources have been developed for the nanowatt and microwatt power levels. The use of alpha emitters alphavoltaics would increase the energy output by a factor of 100 using the same size, weight, and packaging. Wide band-gap radiation-tolerant semiconductors diamond, gallium nitride, and silicon carbide are evaluated in order to convert the 5-MeV alpha decays into electrical current. Alpha energy deposition in diamond and gallium nitride GaN was calculated and compared. Alpha-voltaic energy converters were designed in diamond and GaN based on the energy deposition calculations. Diamond p p structures of 9-m thickness each would place the depletion region at the maximum energy deposition location. The device structures are described.

Subject Categories:

  • Electric Power Production and Distribution

Distribution Statement:

APPROVED FOR PUBLIC RELEASE