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Mid-Infrared Standoff Detection of Explosives Using a Tunable EC-QCL

Dreier, Lisa and Kölbl, Christoph and Köhntopp, Anja and Duschek, Frank (2022) Mid-Infrared Standoff Detection of Explosives Using a Tunable EC-QCL. 14th CBRNe Protection Symposium, 2022-10-19 - 2022-10-22, Malmö, Schweden.

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Abstract

There has been a fundamental change in security risk for society within the last years. Especially terror attacks like in Cucuta (2021), Kabul (2021) or Brüssel (2016) have shown how important it is to protect critical infrastructures such as airports. Fast and reliable detection of hazardous trace materials is one key for achieving improved safety standards in the future. In that context, remote detection of explosive materials is of great interest, as it allows for threat detection without putting people in harms way. Therefore, it is imperative to develop chemically selective and sensitive methods to detect such materials from a safe distance. For this reason, we are developing a new standoff mid infrared spectroscopy system at the DLR Institute of Technical Physics. The system based on a widely tunable (from 6.1 to 11 µm) quantum cascade laser is able to capture multiple vibrational spectroscopic signatures of the explosives and thus highly selective. The high repetition rate of the laser and a detection scheme with a large signal-to-noise ratio result in a system with a very high sensitivity which allows for the detection of traces of explosives on various background materials. A detection system for field employment does not only have to detect traces of explosives but also needs to automatically raise an alarm in the event of the detection of a hazardous material. Therefore, a model is developed to classify our data into several groups, i.e. explosives and non-explosives. Measurements of various explosive and non-explosive substances on different background materials have been performed at a distance of roughly one meter. To characterize the influence of the sample orientation on the signal strength and spectral shape, the samples have been detected at different angles as well.

Item URL in elib:https://elib.dlr.de/188448/
Document Type:Conference or Workshop Item (Speech)
Title:Mid-Infrared Standoff Detection of Explosives Using a Tunable EC-QCL
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Dreier, LisaUNSPECIFIEDhttps://orcid.org/0000-0002-2791-713XUNSPECIFIED
Kölbl, ChristophUNSPECIFIEDhttps://orcid.org/0000-0001-6518-0012UNSPECIFIED
Köhntopp, AnjaUNSPECIFIEDhttps://orcid.org/0000-0003-2761-0821UNSPECIFIED
Duschek, FrankUNSPECIFIEDhttps://orcid.org/0000-0002-1809-0257UNSPECIFIED
Date:20 September 2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Phylax, remote detection, infrared spectroscopy, QCL, explosives detection
Event Title:14th CBRNe Protection Symposium
Event Location:Malmö, Schweden
Event Type:international Conference
Event Start Date:19 October 2022
Event End Date:22 October 2022
Organizer:Swedish Defense Agency, FOI, Sweden
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment
Location: Lampoldshausen
Institutes and Institutions:Institute of Technical Physics > Atmospheric Propagation and Effect
Deposited By: Dreier, Lisa
Deposited On:13 Oct 2022 10:53
Last Modified:24 Apr 2024 20:49

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