R
Ralf Srama
Researcher at University of Stuttgart
Publications - 269
Citations - 8158
Ralf Srama is an academic researcher from University of Stuttgart. The author has contributed to research in topics: Cosmic dust & Interplanetary dust cloud. The author has an hindex of 43, co-authored 264 publications receiving 7101 citations. Previous affiliations of Ralf Srama include Baylor University & Max Planck Society.
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Stardust Interstellar Preliminary Examination IV: Scanning transmission X-ray microscopy analyses of impact features in the Stardust Interstellar Dust Collector
Anna L. Butterworth,Andrew J. Westphal,Tolek Tyliszczak,Zack Gainsforth,Julien Stodolna,D. Frank,Carlton Allen,David Anderson,Asna Ansari,Saša Bajt,Ron K. Bastien,Nabil Bassim,Hans A. Bechtel,Janet Borg,Frank E. Brenker,John Bridges,Donald E. Brownlee,Mark J. Burchell,Manfred Burghammer,Hitesh Changela,Peter Cloetens,Andrew M. Davis,Ryan Doll,Christine Floss,George J. Flynn,Eberhard Grün,Philipp R. Heck,Jon K. Hillier,Peter Hoppe,Bruce Hudson,Joachim Huth,Brit Hvide,Anton T. Kearsley,Ashley J. King,Barry Lai,Jan Leitner,Laurence Lemelle,Hugues Leroux,Ariel Leonard,R. Lettieri,William Marchant,Larry R. Nittler,Ryan C. Ogliore,Wei Ja Ong,Frank Postberg,Mark C. Price,Scott A. Sandford,Juan-Angel Sans Tresseras,Sylvia Schmitz,Tom Schoonjans,Geert Silversmit,Alexandre Simionovici,Vicente A. Solé,Ralf Srama,Frank J. Stadermann,Thomas Stephan,Veerle Sterken,Veerle Sterken,Veerle Sterken,Rhonda M. Stroud,Steven Sutton,Mario Trieloff,Peter Tsou,Akira Tsuchiyama,Bart Vekemans,Laszlo Vincze,Joshua Von Korff,Naomi Wordsworth,Daniel Zevin,Michael E. Zolensky +69 more
TL;DR: In this paper, the authors report the quantitative characterization by synchrotron soft X-ray spectroscopy of 31 potential impact features in the aerogel capture medium of the Stardust Interstellar Dust Collector.
Journal ArticleDOI
Characteristics of a dust trajectory sensor
TL;DR: It is shown that the response of the reduced model can be applied to a model with more planes and more wires per plane, and the effect of a trajectory's position and angle on the signal strength and the influence of geometrical parameters such as wire diameter, distance between wire planes, and wire length is discussed.
Journal ArticleDOI
Stardust Interstellar Preliminary Examination IX: High-speed interstellar dust analog capture in Stardust flight-spare aerogel
Frank Postberg,Frank Postberg,Jon K. Hillier,S. P. Armes,S. Bugiel,S. Bugiel,Anna L. Butterworth,Damien Dupin,Lee A. Fielding,Syuji Fujii,Zack Gainsforth,E. Gruen,E. Gruen,Y. W. Li,Y. W. Li,Y. W. Li,Ralf Srama,Veerle Sterken,Veerle Sterken,Veerle Sterken,Julien Stodolna,Mario Trieloff,Andrew J. Westphal,C. Achilles,Carlton Allen,Asna Ansari,Saša Bajt,Nabil Bassim,Ron K. Bastien,Hans A. Bechtel,Janet Borg,Frank E. Brenker,John Bridges,Donald E. Brownlee,Mark J. Burchell,Manfred Burghammer,Hitesh Changela,Hitesh Changela,Peter Cloetens,Andrew M. Davis,Ryan Doll,Christine Floss,George J. Flynn,D. Frank,Philipp R. Heck,Peter Hoppe,Gary R. Huss,Joachim Huth,Anton T. Kearsley,Ashley J. King,Barry Lai,Jan Leitner,Laurence Lemelle,Ariel Leonard,Hugues Leroux,R. Lettieri,William Marchant,Larry R. Nittler,Ryan C. Ogliore,Wei Ja Ong,Mark C. Price,Scott A. Sandford,J.-A. Sans Tressaras,Sylvia Schmitz,Tom Schoonjans,Kate Schreiber,Geert Silversmit,Alexandre Simionovici,Vicente A. Solé,Frank J. Stadermann,Thomas Stephan,Rhonda M. Stroud,Steven Sutton,Peter Tsou,Akira Tsuchiyama,T. Tyliczszak,Bart Vekemans,Laszlo Vincze,Daniel Zevin,Michael E. Zolensky +79 more
TL;DR: In this paper, the results of laboratory hypervelocity impact experiments, during which cosmic dust analog particles (diameters of between 0.2 and 0.4 mu m), composed of olivine, orthopyroxene, or an organic polymer, were accelerated onto Stardust flight-spare low-density (approximately 0.01 g cm(-3)) silica aerogel.
Journal ArticleDOI
Stardust Interstellar Preliminary Examination III: Infrared spectroscopic analysis of interstellar dust candidates
Hans A. Bechtel,George J. Flynn,Carlton Allen,David Anderson,Asna Ansari,Saša Bajt,Ron K. Bastien,Nabil Bassim,Janet Borg,Frank E. Brenker,John Bridges,Donald E. Brownlee,Mark J. Burchell,Manfred Burghammer,Anna L. Butterworth,Hitesh Changela,Peter Cloetens,Andrew M. Davis,Ryan Doll,Christine Floss,D. Frank,Zack Gainsforth,Eberhard Grün,Philipp R. Heck,Jon K. Hillier,Peter Hoppe,Bruce Hudson,Joachim Huth,Brit Hvide,Anton T. Kearsley,Ashley J. King,Ashley J. King,Barry Lai,Jan Leitner,Laurence Lemelle,Hugues Leroux,Ariel Leonard,R. Lettieri,William Marchant,Larry R. Nittler,Ryan C. Ogliore,Wei Ja Ong,Frank Postberg,Frank Postberg,Mark C. Price,Scott A. Sandford,Juan-Angel Sans Tresseras,Sylvia Schmitz,Tom Schoonjans,Geert Silversmit,Alexandre Simionovici,Vicente A. Solé,Ralf Srama,Frank J. Stadermann,Thomas Stephan,Veerle Sterken,Veerle Sterken,Veerle Sterken,Julien Stodolna,Rhonda M. Stroud,Steven Sutton,Mario Trieloff,Peter Tsou,Akira Tsuchiyama,Tolek Tyliszczak,Bart Vekemans,Laszlo Vincze,Joshua Von Korff,Andrew J. Westphal,Naomi Wordsworth,Daniel Zevin,Michael E. Zolensky +71 more
TL;DR: In this paper, the authors used synchrotron Fourier transform infrared (FTIR) microscopy to detect organic matter in small particles within picokeystones from the Stardust interstellar dust collector.
Journal ArticleDOI
Stardust Interstellar Preliminary Examination II: Curating the interstellar dust collector, picokeystones, and sources of impact tracks
D. Frank,Andrew J. Westphal,Michael E. Zolensky,Zack Gainsforth,Anna L. Butterworth,Ron K. Bastien,Carlton Allen,David Anderson,Asna Ansari,Saša Bajt,Nabil Bassim,Hans A. Bechtel,Janet Borg,Frank E. Brenker,John Bridges,Donald E. Brownlee,Mark J. Burchell,Manfred Burghammer,Hitesh Changela,Peter Cloetens,Andrew M. Davis,Andrew M. Davis,Ryan Doll,Christine Floss,George J. Flynn,Eberhard Grün,Philipp R. Heck,Jon K. Hillier,Peter Hoppe,Bruce Hudson,Joachim Huth,Brit Hvide,Anton T. Kearsley,Ashley J. King,Barry Lai,Jan Leitner,Laurence Lemelle,Hugues Leroux,Ariel Leonard,R. Lettieri,William Marchant,Larry R. Nittler,Ryan C. Ogliore,Wei Ja Ong,Frank Postberg,Mark C. Price,Scott A. Sandford,Juan-Angel Sans Tresseras,Sylvia Schmitz,Tom Schoonjans,Geert Silversmit,Alexandre Simionovici,Vicente A. Solé,Ralf Srama,Thomas Stephan,Veerle Sterken,Veerle Sterken,Julien Stodolna,Rhonda M. Stroud,Steven Sutton,Mario Trieloff,Peter Tsou,Akira Tsuchiyama,Tolek Tyliszczak,Bart Vekemans,Laszlo Vincze,Joshua Von Korff,Naomi Wordsworth,Daniel Zevin +68 more
TL;DR: In this paper, the authors discuss the inherent difficulties that arise during "ground truth" characterization of the Stardust interstellar dust collector, and provide a detailed description of the sample preparation techniques developed to address the unique goals and restrictions of the Interstellar Preliminary Exam.