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19 results on '"Diekmann, Christian"'

1. Sub-pm/$\mathrm{\mathbf{\sqrt{\rm Hz}}}$ non-reciprocal noise in the LISA backlink fiber

Author

Fleddermann, Roland, Diekmann, Christian, Steier, Frank, Tröbs, Michael, Heinzel, Gerhard, and Danzmann, Karsten

Subjects
Physics - Instrumentation and Detectors, Physics - Optics
Abstract

The future space-based gravitational wave detector Laser Interferometer Space Antenna (LISA) requires bidirectional exchange of light between its two optical benches on board of each of its three satellites. The current baseline foresees a polarization-maintaining single-mode fiber for this backlink connection. Phase changes which are common in both directions do not enter the science measurement, but differential ("non-reciprocal") phase fluctuations directly do and must thus be guaranteed to be small enough. We have built a setup consisting of a Zerodur$^{\rm TM}$ baseplate with fused silica components attached to it using hydroxide-catalysis bonding and demonstrated the reciprocity of a polarization-maintaining single-mode fiber at the 1 pm/$\sqrt{\textrm{Hz}}$ level as is required for LISA. We used balanced detection to reduce the influence of parasitic optical beams on the reciprocity measurement and a fiber length stabilization to avoid nonlinear effects in our phase measurement system (phase meter). For LISA, a different phase meter is planned to be used that does not show this nonlinearity. We corrected the influence of beam angle changes and temperature changes on the reciprocity measurement in post-processing.

Published
2017
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2. Readout for intersatellite laser interferometry: Measuring low frequency phase fluctuations of HF signals with microradian precision

Author

Gerberding, Oliver, Diekmann, Christian, Kullmann, Joachim, Tröbs, Michael, Bykov, Ioury, Barke, Simon, Brause, Nils Christopher, Delgado, Juan José Esteban, Schwarze, Thomas S., Reiche, Jens, Danzmann, Karsten, Rasmussen, Torben, Hansen, Torben Vendt, Engaard, Anders, Pedersen, Søren Møller, Jennrich, Oliver, Suess, Martin, Sodnik, Zoran, and Heinzel, Gerhard

Subjects
Physics - Instrumentation and Detectors
Abstract

Precision phase readout of optical beat note signals is one of the core techniques required for intersatellite laser interferometry. Future space based gravitational wave detectors like eLISA require such a readout over a wide range of MHz frequencies, due to orbit induced Doppler shifts, with a precision in the order of $\mu \textrm{rad}/\sqrt{\textrm{Hz}}$ at frequencies between $0.1\,\textrm{mHz}$ and $1\,\textrm{Hz}$. In this paper, we present phase readout systems, so-called phasemeters, that are able to achieve such precisions and we discuss various means that have been employed to reduce noise in the analogue circuit domain and during digitisation. We also discuss the influence of some non-linear noise sources in the analogue domain of such phasemeters. And finally, we present the performance that was achieved during testing of the elegant breadboard model of the LISA phasemeter, that was developed in the scope of an ESA technology development activity., Comment: submitted to Review of Scientific Instruments on April 30th 2015

Published
2015
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5. An elegant Breadboard of the optical bench for eLISA/NGO

Author

d’Arcio, Luigi, primary, Diekmann, Christian, primary, Fitzsimons, Ewan D., primary, Hogenhuis, Harm, primary, Lieser, Maike, primary, Pijnenburg, Joep, primary, Taylor, Alasdair, primary, Weise, Dennis, primary, Bogenstahl, Johanna, primary, Heinzel, Gerhard, primary, Killow, Christian J., primary, Nikolov, Susanne, primary, Perreur-Lloyd, Michael, primary, Robertson, David I., primary, Tröbs, Michael, primary, and Ward, Harry, primary

Published
2017
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7. An Elegant Breadboard of the Optical Bench for eLISA/NGO.

Author

d'Arcio, Luigi, Bogenstahl, Johanna, Diekmann, Christian, Fitzsimons, Ewan D., Heinzel, Gerhard, Hogenhuis, Harm, Killow, Christian J., Lieser, Maike, Nikolov, Susanne, Perreur-Lloyd, Michael, Pijnenburg, Joep, Robertson, David I., Taylor, Alasdair, Tröbs, Michael, Ward, Harry, and Weise, Dennis

Published
2017
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12. NGO assessment study report (Yellow Book)

Author

Jennrich, O., Binétruy, P., Colpi, M., Danzmann, K., Jetzer, P., Lobo, A., Nelemans, G., Schutz, B., Stebbins, R., Sumner, T., Vitale, S., Ward, H., Gianolio, A., Mcnamara, P., d'Arcio, L., Johlander, B., Scalamiero, L., Sodnik, Z., Texier, D., Amaro-Seoane, Pau, Argence, B., Aston, Stuart, Aoudia, Sofiane, Auger, G., Babak, Stas, Baker, John, Barke, Simon, Benacquista, Matthew, Berti, Emanuele, Bykov, Iouri, Caldwell, Martin, Camp, Jordan, Caprini, C., Conklin, John, Debra, Dan, Di Fiore, Luciano, Diekmann, Christian, Dufaux, J.-F., Bohe, A., Esteban Delgado, Juan Jose, Fitzsimons, Ewan, Fleddermann, Roland, Gair, Jonathan, Garcia, Antonio, Grimani, Catia, Guzman, Felipe, Halloin, H., Hyde, Tupper, Harris, Ian, Heinzel, Gerhard, Hewitson, Martin, Hochman, Steven, Hollington, Daniel, Jedrich, Nick, Keiser, Mac, Killow, Christian, Klipstein, William, Kullmann, Joachim, Lang, Ryan, Littenberg, Tyson, Livas, Jeffrey, Mansoor, Achmed, Mckenzie, Kirk, Mcwilliams, Sean, Merkowitz, Stephen, Mitryk, Shawn, Monsky, Anneke, Müller, Guido, Nofrarias, Miquel, Numata, Kenji, Perreur-Lloyd, Mike, Petiteau, A., Plagnol, E., Pniel, Moshe, Pollack, Scott, Porter, E.K., Preston, Alix, Quetschke, Volker, Robertson, Dave, Rüdiger, Albrecht, Sanjuan, Josep, Sathyaprakash, B., Sesana, Alberto, Shaddock, Daniel, Shaul, Diana, Sheard, Ben, Spero, Robert, Steier, Frank, Sun, Ke-Xun, Sweeney, Dylan, Tanner, David, Troebs, Michael, de Vine, Glenn, Volonteri, Marta, Wand, Vinzenz, Wanner, Gudrun, Ware, Brent, Wass, Peter, Weber, Bill, Yu, Yinan, Vallisneri, Michele, Vecchio, Alberto, Zoellner, Andreas, APC - THEORIE, AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut für theoretische Physik, Universität Hamburg (UHH)-Universität Hamburg (UHH), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), APC - Cosmologie, Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, APC - Gravitation (APC-Gravitation), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, eLISA/NGO, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut für theoretische Physik, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut für theoretische Physik, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), and Porter, Edward K

Subjects
[SDU.ASTR.CO] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
Abstract

http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=49839#; The NGO (New Gravitational wave Observatory) concept results from the reformulation of the LISA mission into a European-led mission. This report, the so-called Yellow Book, contains the results of ESA's assessment study (Phase 0/A) of the candidate L-class Cosmic Vision mission NGO.

Published
2012

13. Readout for intersatellite laser interferometry: Measuring low frequency phase fluctuations of high-frequency signals with microradian precision

Author

Gerberding, Oliver, primary, Diekmann, Christian, additional, Kullmann, Joachim, additional, Tröbs, Michael, additional, Bykov, Ioury, additional, Barke, Simon, additional, Brause, Nils Christopher, additional, Esteban Delgado, Juan José, additional, Schwarze, Thomas S., additional, Reiche, Jens, additional, Danzmann, Karsten, additional, Rasmussen, Torben, additional, Hansen, Torben Vendt, additional, Enggaard, Anders, additional, Pedersen, Søren Møller, additional, Jennrich, Oliver, additional, Suess, Martin, additional, Sodnik, Zoran, additional, and Heinzel, Gerhard, additional

Published
2015
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15. An elegant Breadboard of the optical bench for eLISA/NGO

Author

d’Arcio, Luigi, Bogenstahl, Johanna, Diekmann, Christian, Fitzsimons, Ewan D., Heinzel, Gerhard, Hogenhuis, Harm, Killow, Christian J., Lieser, Maike, Nikolov, Susanne, Perreur-Lloyd, Michael, Pijnenburg, Joep, Robertson, David I., Taylor, Alasdair, Tröbs, Michael, Ward, Harry, and Weise, Dennis

Published
2017
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19. Radiographic location of the origin and insertion of the canine medial glenohumeral ligament.

Author

Diekmann C, Winkels P, Fehr M, von Freeden N, and Harms O

Subjects
Animals, Radiography, Dogs anatomy & histology, Ligaments, Articular anatomy & histology, Ligaments, Articular diagnostic imaging, Shoulder Joint anatomy & histology, Shoulder Joint diagnostic imaging
Abstract

Objective: To define the radiographic origin and insertion of the canine medial glenohumeral ligament (MGHL) at the scapula and the humerus of dogs as radiographic aim points for the surgical ligament reconstruction., Material and Methods: The forelimbs (n = 20) from 10 adult, orthopaedically unaffected dogs (> 20 kg body weight) were used. Radiopaque markers (1 mm steel bullet) were placed into the visual origin and insertion of the MGHL. Finally, virtual digital radiographs were produced in medio-lateral and cranio-caudal projection and the location of the origin and insertion points were expressed using four different methods (4x4 grid box method, percentage position in the grid box for the medio-lateral projection, the percentage position orientated at different landmarks and the clock-face scale method)., Results: The relative positions of the centre of origin and insertion points of the MGHL were located constantly in radiographs in relation to anatomical landmarks in the canine shoulder. Therefore the described methods are useful for determination., Conclusion: The radiographic location of the origin and insertion points of the MGHL can be consistently predicted in radiographs of dogs with a body weight above 20 kg., Clinical Significance: The reported data can be used to verify the correct placement of the insertion of bone anchors for stabilising a medial shoulder instability by ligament reconstruction in dogs.

Published
2016
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