Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Kai Degreif"'
Autor:
Kai Degreif, Quankui Yang, Rachid Driad, J. Jarvis, Frank Fuchs, Frank Schnürer, M. Kinzer, Rolf Aidam, Wolfgang Bronner, Stefan Hugger
Publikováno v:
SPIE Proceedings.
We demonstrate contactless detection of solid residues of explosives using mid-infrared laser spectroscopy. Our detection scheme relies on active laser illumination, synchronized with the collection of the backscattered radiation by an infrared camer
Autor:
M. Kinzer, Quankui Yang, Frank Fuchs, Stefan Hugger, Wenka Schweikert, Sven Rademacher, Frank Schnürer, Rolf Aidam, Kai Degreif, Wolfgang Bronner
Publikováno v:
Quantum Sensing and Nanophotonic Devices IX.
We present standoff detection of various explosives by backscattering spectroscopy, using a sensing system based on mid-IR external-cavity quantum cascade lasers (EC-QCL) with a broad tunable range of about 300 cm-1. Traces of TNT (trinitrotoluene),
Autor:
Frank Fuchs, Stefan Hugger, Kai Degreif, Frank Schnürer, Wenka Schweikert, Sven Rademacher, Petya Dasheva
Publikováno v:
Quantum Sensing and Nanophotonic Devices VIII.
We present a system for the stand-off detection of solid explosive traces and precursors on surfaces. The system consists of a widely tunable quantum cascade laser (QCL) and a thermal imaging camera. The external cavity quantum cascade laser (EC-QCL)
Imaging stand-off detection of explosives by quantum cascade laser based backscattering spectroscopy
Autor:
M. Kinzer, Quankui Yang, R. Losch, Stefan Hugger, Wenka Schweikert, Kai Degreif, Rolf Aidam, Wolfgang Bronner, Borislav Hinkov, Frank Schnürer, Frank Fuchs
Publikováno v:
SPIE Proceedings.
In this contribution we present the results of an imaging stand-off detection system based on a mid-IR external-cavity quantum cascade laser (EC-QCL) with a broad tunable range of 200 cm-1. Traces of TNT (trinitrotoluene) and PETN (pentaerythritol te
Autor:
Jan M. Kaster, Borislav Hinkov, Wenka Schweikert, Frank Fuchs, Sven Rademacher, Rolf Aidam, Wolfgang Bronner, Frank Schnürer, Kai Degreif, Klaus Köhler, Stefan Hugger, Quankui Yang
Publikováno v:
SPIE Proceedings.
Results on the detection of traces of trinitrotoluene (TNT) on different substrate-materials like Aluminum and standard car paint are presented. We investigated different samples with a movable imaging standoff detection system at angles of incidence
Publikováno v:
Environmental Science and Engineering ISBN: 9783540369042
A novel technique is presented that makes it possible to measure the viscous shear stress τμ from active thermography. With a CO2 laser, patterns are written to the sea surface. This temperature structure is distorted by the linear velocity profile
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27eb2ab4e59260697a580b4e74bb7afe
https://doi.org/10.1007/978-3-540-36906-6_16
https://doi.org/10.1007/978-3-540-36906-6_16
Publikováno v:
Environmental Science and Engineering ISBN: 9783540369042
Laser-Induced Fluorescence (LIF) is applied to observe directly the mechanism of gas exchange in the aqueous viscous boundary layer at a free water surface. In order to make dissolved oxygen (DO) visible, a new class of dyes with a long phosphorescen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd9f31967f40eb5e88a5c1e34e196418
https://doi.org/10.1007/978-3-540-36906-6_4
https://doi.org/10.1007/978-3-540-36906-6_4
Autor:
F. Fleischer, Dirk Schwalm, Kai Degreif, V. Liechtenstein, Gerald Gwinner, Michael Lestinsky, Florian Plenge
Publikováno v:
Physical review letters. 96(6)
A new determination of the decay rate of the negative ion of positronium (${\mathrm{Ps}}^{\ensuremath{-}}$), using a beam-foil method and a stripping-based detection technique, is reported. The measured result of $\ensuremath{\Gamma}=2.089(15)\text{
Autor:
Frank Schnürer, Quankui K. Yang, R. Losch, Wolfgang Bronner, M. Kinzer, Rolf Aidam, Kai Degreif, Stefan Hugger, Frank Fuchs
Publikováno v:
Optical Engineering. 49:111127
The use of a tunable midinfrared external cavity quantum cascade laser for the standoff detection of explosives at medium distances between 2 and 5 m is presented. For the collection of the diffusely backscattered light, a high-performance infrared i
Autor:
Wolfgang Bronner, Kai Degreif, W. Konz, Wenka Schweikert, Sven Rademacher, Frank Fuchs, Rolf Aidam, F. Schnuerer, M. Kinzer, R. Loesch, Quankui Yang, Stefan Hugger
Publikováno v:
Scopus-Elsevier
Based on broadly tunable external cavity quantum lasers (EC-QCL) an imaging system has been developed for stand-off detection of traces of explosives. A similar EC-QCL serves for detection of hazardous chemicals in drinking water.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::375446a258dfcebd89bfd4ade380ec32
http://www.scopus.com/inward/record.url?eid=2-s2.0-84897369381&partnerID=MN8TOARS
http://www.scopus.com/inward/record.url?eid=2-s2.0-84897369381&partnerID=MN8TOARS