Basic Research of Intrinsic Tamper indication Markings and Patterns defined by Pulsed Laser Irradiation

Technical Report · Sun Mar 01 04:00:00 EST 2020

DOI:https://doi.org/10.2172/1608082· OSTI ID:1608082

Adams, David P. ^[1]; Moody, Neville R. ^[1]; Yarrington, Cole D. ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

With our previous research, it was found that surface asperities or roughness must be present to create periodic surface structures upon laser exposure. In particular, an initial rough surface morphology (such as that found with a machined surface) provides multiple sites for light scattering, which underlies the formation of periodic ripple morphologies. Light scattering from a random surface creates patterns of periodic structures (with complex orientations) that could be used as intrinsic markings for tagging materials and equipment. Despite these initial findings, the fundamental mechanisms that give rise to periodic surface structures and their characteristic shapes were not identified in prior research.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: Defense Threat Reduction Agency (DTRA); USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000; NA0003525
• OSTI ID: 1608082
• Report Number(s): SAND--2020-3675R; 685097
• Country of Publication: United States
• Language: English

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