10,141 research outputs found
X-ray detection of disordered orthopyroxenes in meteorites Final report, 1 Jun. 1966 - 31 Oct. 1970
X ray detection of disordered orthopyroxenes in meteorite
The relation between solar cell flight performance data and materials and manufacturing data Quarterly report
Analysis of flight performance data for solar cell power systems in satellite
The Orientation of Unsymmetrical Molecules at Interfaces
A function giving the distribution of the angles of orientation of the molecular axes from the normal to the interface can be obtained if one makes use of a number of special assumptions regarding the forces of orientation. This is compared with the distribution calculated on assuming an extreme form of Langmuir's principle of independent surface action. The importance of having such a function is pointed out
Demonstration of the Zero-Crossing Phasemeter with a LISA Test-bed Interferometer
The Laser Interferometer Space Antenna (LISA) is being designed to detect and
study in detail gravitational waves from sources throughout the Universe such
as massive black hole binaries. The conceptual formulation of the LISA
space-borne gravitational wave detector is now well developed. The
interferometric measurements between the sciencecraft remain one of the most
important technological and scientific design areas for the mission.
Our work has concentrated on developing the interferometric technologies to
create a LISA-like optical signal and to measure the phase of that signal using
commercially available instruments. One of the most important goals of this
research is to demonstrate the LISA phase timing and phase reconstruction for a
LISA-like fringe signal, in the case of a high fringe rate and a low signal
level. We present current results of a test-bed interferometer designed to
produce an optical LISA-like fringe signal previously discussed in the
literature.Comment: find minor corrections in the CQG versio
A Demonstration of LISA Laser Communication
Over the past few years questions have been raised concerning the use of
laser communications links between sciencecraft to transmit phase information
crucial to the reduction of laser frequency noise in the LISA science
measurement. The concern is that applying medium frequency phase modulations to
the laser carrier could compromise the phase stability of the LISA fringe
signal. We have modified the table-top interferometer presented in a previous
article by applying phase modulations to the laser beams in order to evaluate
the effects of such modulations on the LISA science fringe signal. We have
demonstrated that the phase resolution of the science signal is not degraded by
the presence of medium frequency phase modulations.Comment: minor corrections found in the CQG versio
Finite range corrections near a Feshbach resonance and their role in the Efimov effect
We have measured the binding energy of Li Feshbach molecules deep into
the non-universal regime by associating free atoms in a Bose-Einstein
condensate by modulating the magnetic field. We extract the scattering length
from these measurements, correcting for non-universal short-range effects using
several different methods. We find that field-dependent effective range
corrections agree well with the data.
With this more precise determination of the scattering length vs. field we
reanalyze our previous data on the location of atom loss features produced by
the Efimov effect \cite{PollackSci09} and investigate effective range
corrections to universal theory.Comment: Accepted for publication in Phys. Rev.
X-ray Detection of Disordered Orthopyroxenes in Meteorites Semiannual Report, Jun. 1 - Nov. 30, 1966
X-ray detection of disordered orthopyroxenes in meteorite
Partitioning of carbon dioxide between the atmosphere and lithosphere on early Mars
It is pointed out that in addition to the 1 to 5 bar CO2 total inventory, a high level of global volcanism was needed to keep the CO2 from being drawn away permanently by weathering of igneous rocks; the volcanism would continually decompose the carbonate resulting in steady efficient recycling
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