Výsledky vyhledávání - "BRUNO LENGELER"

Exafs Studies of Calcined and Sulfided CO-Mo HDS Catalysts

Autor: Henrik Topsøe, Bjerne S. Clausen, Roberto Candia, Jens Als-Nielsen, Bruno Lengeler

Publikováno v: Bulletin des Sociétés Chimiques Belges. 90:1249-1259

Information regarding the structure of the cobalt containing phases in calcined as well as sulfided Co-Mo/Al2O3 catalysts is obtained by analyzing the extended x-ray absorption fine structure (EXAFS) above the Co K-edge and comparing these results wi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::21bcc52a98436b92c98703edc16cd5da
https://doi.org/10.1002/bscb.19810901209

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Refractive x-ray lenses

Autor: O. Kurapova, Bruno Lengeler, Marion Kuhlmann, Boris Benner, Christian G. Schroer, Federico Zontone, Irina Snigireva, Anatoly Snigirev, Til Florian Gunzler

Publikováno v: Journal of Physics D: Applied Physics. 38:A218-A222

Parabolic refractive x-ray lenses are novel optical components for the hard x-ray range from about 5 keV to about 120 keV. They are compact, robust, and easy to align and to operate. They can be used like glass lenses are used for visible light, the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6038bf3d1aac083cbc5035c9dfaa9261
https://doi.org/10.1088/0022-3727/38/10a/042

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High-Resolution Three-Dimensional X-Ray Microscopy

Autor: Bruno Lengeler, Bennett C. Larson

Publikováno v: MRS Bulletin. 29:152-156

This issue of MRS Bulletin focuses on the rapid progress that is ongoing in the development of hard x-ray microscopies with three-dimensional spatial resolutions ranging from micrometers to nanometers. The individual articles provide a crosscut of de

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6af7eb8b573b934cafbd1d75f3f11c06
https://doi.org/10.1557/mrs2004.52

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Parabolic refractive X-ray lenses

Autor: Christian G. Schroer, Christiane Zimprich, Til Florian Gunzler, Jannik C. Meyer, Achim Gerhardus, Marion Kuhlmann, Boris Benner, Bruno Lengeler

Publikováno v: Journal of Synchrotron Radiation. 9:119-124

Parabolic refractive X-ray lenses are optical components, especially suitable for third-generation synchrotron radiation sources. This article describes the status of the development of our lenses and illustrates the possibilities for micrometre and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc143698d76868f602bd3bf086900984
https://doi.org/10.1107/s0909049502003436

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X-ray laminography and SAXS on beryllium grades and lenses and wavefront propagation through imperfect compound refractive lenses

Autor: Bruno Lengeler, Liubov Samoylova, Thomas Roth, Lukas Helfen, Anders Madsen, Paweł Kwaśniewski, Jörg Hallmann

Publikováno v: SPIE Proceedings.

Hard X-ray free electron lasers provide almost fully transverse coherent X-rays. Though the natural divergence of these X-rays is a few micro-radians, they still need to be collimated or focused while traveling up to 1km towards the sample. This can

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0f38aab96a7f60bfa89018ae4c0dfd72
https://doi.org/10.1117/12.2061127

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Refractive lenses as a beam diagnostics tool for high-energy synchrotron radiation

Autor: O. Chubar, Timm Weitkamp, Michael Drakopoulos, Bruno Lengeler, A. Souvorov, Anatoly Snigirev, F. Günzler, Irina Snigireva, Christian G. Schroer

Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. :248-251

Parabolic compound refractive lenses (CRLs) for hard X rays have been used to image the electron beam at undulator and bending-magnet beamlines at the ESRF. The measurements yield the shape and size of the synchrotron radiation source, and show that

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e8c14f3df1aab4015739304f00eb68d9
https://doi.org/10.1016/s0168-9002(01)00284-4

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Hard X-ray full field microscopy and magnifying microtomography using compound refractive lenses

Autor: Timm Weitkamp, Irina Snigireva, Bruno Lengeler, Marion Kuhlmann, J. Tümmler, Anatoly Snigirev, Boris Benner, Christian G. Schroer, Til Florian Gunzler, Christoph Rau

Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. :966-969

For hard X-rays, parabolic compound refractive lenses (PCRLs) are genuine imaging devices like glass lenses for visible light. Based on these new lenses, a hard X-ray full field microscope has been constructed that is ideally suited to image the inte

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::995fee5f4ffd2c7caf88ff68501a32cc
https://doi.org/10.1016/s0168-9002(01)00542-3

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Technology for the fabrication of ultrashort channel metal–oxide–semiconductor field-effect transistors

Autor: Joerg Appenzeller, Paul M. Solomon, Kang L. Wang, Bruno Lengeler, Y. Lu, Jorg Scholvin, Richard Martel, Joachim Knoch, J.A. del Alamo, Phaedon Avouris, Ch. Dieker

Publikováno v: Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 19:1737-1741

We present the experimental details for the preparation of an ultrashort channel metal–oxide–semiconductor field-effect transistor (MOSFET) using a V-groove approach. This new fabrication process allows a definition of the channel with a resoluti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d823d55f0471e2409f1e5a8a6cb48e3d
https://doi.org/10.1116/1.1351803

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Optik: Röntgenlinsen: Linsen für weiche und harte Röntgenstrahlung erlauben den Bau von Röntgenmikroskopen und Mikrosonden

Autor: Bruno Lengeler, G. Schmahl, D. Rudolph, Christian G. Schroer

Publikováno v: Physik Journal. 57:43-48

Zur Fokussierung weicher Rontgenstrahlung mit Photonenenergien von einigen hundert Elektronenvolt bis zu einigen Kilo-Elektronenvolt werden Zonenplatten als hochauflosende Rontgenlinsen in Rontgenmikroskopen eingesetzt. Im harten Rontgenbereich oberh

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::deaf8ec6ca88604b0f942aeb3fdfd4dc
https://doi.org/10.1002/phbl.20010570112

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Preparation of highly transparent superconductor-semiconductor contacts

Autor: Joerg Appenzeller, Joachim Knoch, Bruno Lengeler

Publikováno v: Scopus-Elsevier

In this report we present a procedure to fabricate highly transmissive superconducting Nb-In0.77Ga0.23As contacts. A combination of a sulphur passivation of the etched semiconductor prior to the deposition of Nb and an annealing step is used. To quan

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::310394870dd715d3c0601e3ee69b005a
https://doi.org/10.1063/1.1288504

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