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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Journal ArticleDOI
Response of a pentagonal PZT element as a component of a 4π-real-time detector
Takashi Miyachi,Masayuki Fujii,Nobuyuki Hasebe,G. Kuraza,Kunishiro Mori,Osamu Okudaira,Naoyuki Yamashita,Sho Sasaki,Takeo Iwai,Ken-Ichi Nogami,Hironori Matsumoto,Hideo Ohashi,Hiromi Shibata,Shigeyuki Minami,Seiji Takechi,Toshiyuki Onishi,Eberhard Grün,Ralf Srama,Nagaya Okada +18 more
TL;DR: In this paper, a charge-sensitive amplifier was developed for the pentagonal element of its capacitance ∼10 nF to measure the momentum during collision from the output amplitude, and a set of electrodes on the surface was used to confirm the measurement of the coordinates at collision.
Proceedings ArticleDOI
Accelerator experiments with soft protons and hyper-velocity dust particles: application to ongoing projects of future X-ray missions
Emanuele Perinati,Sebastian Diebold,Eckhard Kendziorra,Andrea Santangelo,C. Tenzer,J. Jochum,S. Bugiel,Ralf Srama,E. Del Monte,Marco Feroci,Alda Rubini,A. Rachevski,Gianluigi Zampa,N. Zampa,I. Rashevskaya,A. Vacchi,P. Azzarello,Enrico Bozzo,J. W. den Herder,Silvia Zane,Søren Brandt,Margarita Hernanz,Maurice A. Leutenegger,R. L. Kelley,Caroline A. Kilbourne,Norbert Meidinger,Lothar Strüder,B. Cordier,D. Gotz,George W. Fraser,J. P. Osborne,Konrad Dennerl,Michael Freyberg,Peter Friedrich +33 more
TL;DR: In this article, the authors report on their activities, currently in progress, aimed at performing accelerator experiments with soft protons and hyper-velocity dust particles, which include tests of different types of X-ray detectors and related components.
Journal ArticleDOI
Investigation on piezoelectric lead zirconate titanate detector bombarded obliquely with hypervelocity iron particles
Seiji Takechi,Toshiyuki Onishi,Shigeyuki Minami,Takashi Miyachi,Masayuki Fujii,Nobuyuki Hasebe,Kunishiro Mori,Ken-Ichi Nogami,Hideo Ohashi,Sho Sasaki,Hiromi Shibata,Takeshi Iwai,Eberhard Grün,Ralf Srama,Nagaya Okada +14 more
TL;DR: In this article, a cosmic dust detector for use onboard a satellite is constructed from piezoelectric lead zirconate titanate (PZT) and the characteristics of the PZT detector were studied by bombarding it with hypervelocity iron particles, which were supplied by a Van de Graaff accelerator.
Journal ArticleDOI
Counter data of the Cosmic Dust Analyzer aboard the Cassini spacecraft and possible “dust clouds” at Saturn
TL;DR: In this article, the impact rates of dust particles recorded by the Cosmic Dust Analyzer (CDA) aboard the Cassini spacecraft were analyzed and the authors found that the dust density peaks at two times, at least, in a void region between Titan and Rhea.