The Experts below are selected from a list of 5880 Experts worldwide ranked by ideXlab platform
James D. Phillips - One of the best experts on this subject based on the ideXlab platform.
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a weak equivalence principle test on a suborbital Rocket
Classical and Quantum Gravity, 2010Co-Authors: Robert D Reasenberg, James D. PhillipsAbstract:We describe a Galilean test of the weak equivalence principle, to be conducted during the free fall portion of a Sounding Rocket flight. The test of a single pair of substances is aimed at a measurement uncertainty of ?(?) < 10?16 after averaging the results of eight separate drops. The weak equivalence principle measurement is made with a set of four laser gauges that are expected to achieve 0.1 pm Hz?1/2. The discovery of a violation (? ? 0) would have profound implications for physics, astrophysics and cosmology.
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a weak equivalence principle test on a suborbital Rocket
arXiv: General Relativity and Quantum Cosmology, 2010Co-Authors: Robert D Reasenberg, James D. PhillipsAbstract:We describe a Galilean test of the weak equivalence principle, to be conducted during the free fall portion of a Sounding Rocket flight. The test of a single pair of substances is aimed at a measurement uncertainty of sigma(eta) < 10^-16 after averaging the results of eight separate drops. The weak equivalence principle measurement is made with a set of four laser gauges that are expected to achieve 0.1 pm Hz^-1/2. The discovery of a violation (eta not equal to 0) would have profound implications for physics, astrophysics, and cosmology.
Robert D Reasenberg - One of the best experts on this subject based on the ideXlab platform.
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a weak equivalence principle test on a suborbital Rocket
Classical and Quantum Gravity, 2010Co-Authors: Robert D Reasenberg, James D. PhillipsAbstract:We describe a Galilean test of the weak equivalence principle, to be conducted during the free fall portion of a Sounding Rocket flight. The test of a single pair of substances is aimed at a measurement uncertainty of ?(?) < 10?16 after averaging the results of eight separate drops. The weak equivalence principle measurement is made with a set of four laser gauges that are expected to achieve 0.1 pm Hz?1/2. The discovery of a violation (? ? 0) would have profound implications for physics, astrophysics and cosmology.
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a weak equivalence principle test on a suborbital Rocket
arXiv: General Relativity and Quantum Cosmology, 2010Co-Authors: Robert D Reasenberg, James D. PhillipsAbstract:We describe a Galilean test of the weak equivalence principle, to be conducted during the free fall portion of a Sounding Rocket flight. The test of a single pair of substances is aimed at a measurement uncertainty of sigma(eta) < 10^-16 after averaging the results of eight separate drops. The weak equivalence principle measurement is made with a set of four laser gauges that are expected to achieve 0.1 pm Hz^-1/2. The discovery of a violation (eta not equal to 0) would have profound implications for physics, astrophysics, and cosmology.
Thomas Voigtmann - One of the best experts on this subject based on the ideXlab platform.
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direct imaging of light driven colloidal janus particles in weightlessness
Review of Scientific Instruments, 2020Co-Authors: Raphael Kesler, Dirk Brauer, Christoph Dreisigacker, Jorg Drescher, Celia Lozano, Clemens Bechinger, Philip Born, Thomas VoigtmannAbstract:We describe a highly integrated automated experiment module that allows us to investigate the active Brownian motion of light-driven colloidal Janus-particle suspensions. The module RAMSES (RAndom Motion of SElf-propelled particles in Space) is designed for the Sounding Rocket platform MAPHEUS (MAterialPHysikalische Experimente Unter Schwerelosigkeit). It allows us to perform experiments under weightlessness conditions in order to avoid sedimentation of the Janus particles and thus to study the spatially three-dimensional dynamics in the suspension. The module implements a newly developed strong homogeneous light source to excite self-propulsion in the Janus particles. The light source is realized through an array of high-power light-emitting diodes and replaces the conventional laser source, thus reducing heat dissipation and spatial extension of the experiment setup. The Rocket module contains ten independent sample cells in order to ease the systematic study of the effect of control parameters such as light intensity or particle concentration and size in a single Sounding-Rocket flight. For each sample cell, transmitted light intensities are stored for postflight analysis in terms of differential dynamical microscopy.We describe a highly integrated automated experiment module that allows us to investigate the active Brownian motion of light-driven colloidal Janus-particle suspensions. The module RAMSES (RAndom Motion of SElf-propelled particles in Space) is designed for the Sounding Rocket platform MAPHEUS (MAterialPHysikalische Experimente Unter Schwerelosigkeit). It allows us to perform experiments under weightlessness conditions in order to avoid sedimentation of the Janus particles and thus to study the spatially three-dimensional dynamics in the suspension. The module implements a newly developed strong homogeneous light source to excite self-propulsion in the Janus particles. The light source is realized through an array of high-power light-emitting diodes and replaces the conventional laser source, thus reducing heat dissipation and spatial extension of the experiment setup. The Rocket module contains ten independent sample cells in order to ease the systematic study of the effect of control parameters such as ...
Voigtmann Thomas - One of the best experts on this subject based on the ideXlab platform.
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Direct-imaging of light-driven colloidal Janus particles in weightlessness
'AIP Publishing', 2020Co-Authors: Keßler Raphael, Bräuer Dirk, Dreißigacker Christoph, Drescher Jörg, Lozano Celia, Bechinger Clemens, Born Philip, Voigtmann ThomasAbstract:We describe a highly integrated automated experiment module that allows us to investigate the active Brownian motion of light-driven colloidal Janus-particle suspensions. The module RAMSES (RAndom Motion of SElf-propelled particles in Space) is designed for the Sounding Rocket platform MAPHEUS (MAterialPHysikalische Experimente Unter Schwerelosigkeit). It allows us to perform experiments under weightlessness conditions in order to avoid sedimentation of the Janus particles and thus to study the spatially three-dimensional dynamics in the suspension. The module implements a newly developed strong homogeneous light source to excite self-propulsion in the Janus particles. The light source is realized through an array of high-power light-emitting diodes and replaces the conventional laser source, thus reducing heat dissipation and spatial extension of the experiment setup. The Rocket module contains ten independent sample cells in order to ease the systematic study of the effect of control parameters such as light intensity or particle concentration and size in a single Sounding-Rocket flight. For each sample cell, transmitted light intensities are stored for postflight analysis in terms of differential dynamical microscopy
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Direct-imaging of light-driven colloidal Janus particles in weightlessness
2020Co-Authors: Keßler Raphael, Bräuer Dirk, Dreißigacker Christoph, Drescher Jörg, Lozano Celia, Bechinger Clemens, Born Philip, Voigtmann ThomasAbstract:We describe a highly integrated automated experiment module that allows us to investigate the active Brownian motion of light-driven colloidal Janus-particle suspensions. The module RAMSES (RAndom Motion of SElf-propelled particles in Space) is designed for the Sounding Rocket platform MAPHEUS (MAterialPHysikalische Experimente Unter Schwerelosigkeit). It allows us to perform experiments under weightlessness conditions in order to avoid sedimentation of the Janus particles and thus to study the spatially three-dimensional dynamics in the suspension. The module implements a newly developed strong homogeneous light source to excite self-propulsion in the Janus particles. The light source is realized through an array of high-power light-emitting diodes and replaces the conventional laser source, thus reducing heat dissipation and spatial extension of the experiment setup. The Rocket module contains ten independent sample cells in order to ease the systematic study of the effect of control parameters such as light intensity or particle concentration and size in a single Sounding-Rocket flight. For each sample cell, transmitted light intensities are stored for postflight analysis in terms of differential dynamical microscopy.publishe
Hironori A. Fujii - One of the best experts on this subject based on the ideXlab platform.
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t rex bare electro dynamic tape tether technology experiment on Sounding Rocket s520
The Journal of Space Technology and Science, 2012Co-Authors: Takeo Watanabe, Yoshiki Yamagiwa, Tairo Kusagaya, Hirohisa Kojima, Hironori A. Fujii, Hironori Sahara, Shoichiro Takehara, S Sasaki, Takumi AbeAbstract:The project to verify the performance of space tether technology was successfully demonstrated by the launch of the Sounding Rocket S520 the 25tu. The project is the space demonstration of science and engineering technologies of a bare tape electrodynamic tether (EDT) in the international campaign between Japan, USA, Europe and Australia. Method of "Inverse ORIGAMI (Tape tether folding)" was employed in order to deploy the bare tape EDT in a short period time of the suborbital flight. The deployment of tape tether was tested in a various experimental schemes on ground to show high reliability of tape tether deployment. The Rocket was launched on the summer of 2010 and deployed a bare electro-dynamic tape tether with length 132.6 m, which is the world record of the length deployment of tape tether. The verification of tether technology has found a variety kind of science and technology results as the first in the humankind and will lead a large number of applications of space tether technologies
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space demonstration of bare electrodynamic tape tether technology on the Sounding Rocket s520 25
AIAA Guidance Navigation and Control Conference 2011 : proceedings of a meeting held 8-11 august 2011 Porttland Oregon | AIAA Guidance Naviagation and, 2011Co-Authors: Yoshiki Yamagiwa, Takumi Abe, Hirohisa Kojima, Hironori A. Fujii, Hironori Sahara, Shoichiro Takehara, S Sasaki, Takeo Watanabe, Koji TanakaAbstract:A spaceflight validation of bare electro dynamic tape tether technology was conducted. A S520-25 Sounding Rocket was launched successfully at 05:00am on 31 August 2010 and successfully deployed 132.6m of tape tether over 120 seconds in a ballistic flight. The electrodynamic performance of the bare tape tether employed as an atmospheric probe was measured. Flight results are introduced through the present progressive report of the demonstration and the results of flight experiment are examined as the premier report of the international cooperation between Japan, Europe, USA and Australia. Future plans for maturing space tether technology, which will play an important role for future space activities, are also discussed.
