Coherent THz transition radiation for polarization imaging experiments

THz radiation is reflected by conducting materials and has the capability to penetrate a wide variety of non-conducting materials. With such abilities, THz radiation has great potential for imaging applications, e.g., screening and inspection for packaged electronics chips and electronics circuit bo...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2020-02, Vol.464, p.28-31
Main Authors: Pakluea, Siriwan, Rimjaem, Sakhorn, Saisut, Jatuporn, Thongbai, Chitrlada
Format: Article
Language:English
Subjects:
Polarization
THz imaging
THz radiation
Transition radiation
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Summary:THz radiation is reflected by conducting materials and has the capability to penetrate a wide variety of non-conducting materials. With such abilities, THz radiation has great potential for imaging applications, e.g., screening and inspection for packaged electronics chips and electronics circuit boards. High intensity THz radiation have been produced by the accelerator-based radiation source at the Plasma and Beam Physics Research Facility, Chiang Mai University, Thailand. The coherent THz transition radiation was generated from short electron bunches of around 8 MeV and an Al-foil tilted by 45°. Characterization of the backward transition radiation properties was conducted, including spatial distribution, polarization and radiation spectrum. The THz radiation was then used to create THz images of a print circuit board by reflective THz imaging setup. THz imaging with polarized transition radiation is demonstrated. With selected radiation polarization, reflective THz imaging can be improved.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2019.11.027