Plasma Distributions and Anisotropies at Rotational Discountinuities in the Solar Wind From Ulysses Observations
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Ulysses Magnetic field↗
Engineering topics
Goldstein, B.
Publications and source records attributed to Goldstein, B..
Latitudinal Structure of the Heliospheric Current Sheet and Corotating Streams Measured by WIND and ULYSSES
All heliospheric current sheet (HCS) crossings and corotating solar wind streams detectedby both WIND and ULYSSES have been identified.
heliosphecic current sheet (HCS) corotating solar ↗
Correlated variations in the azimuthal and elevation angles of the interplanetary magnetic field
Analysis of data collected during the in-ecliptic phase of the Ulysses mission shows that there are periods during which deviations from the Parker spiral direction in the azimuthal and elevation angles of the interplanetary magnetic field are correlated. There are a number of solar wind structures which might be expected to introduce such a correlation into the data, e.g., CMEs, Stream-stream interfaces or helicity carried by the solar wind. These potential sources fall into two categories: Those produced at or close to the solar wind source region and those produced by extended interactions as the solar wind expands. We will distinguish the contributions of these two source categories and assess the impact on the evolution on the interplanetary magnetic field.
Murphy, N.↗
Hybrid Simulations of Interstellar Pick-Up Ion Acceleration at the Solar Wind Termination Shock
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cosmic rays pick-up ions solar wind termination sh↗
Relationship Between Discontinuities and Alfven Waves as Functions of Radial Distance and Latitude: Ullysses
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discontinuities occurrence Alfvenic wave intervals↗
Modeling of Pickup Ion Distributions in the Halley Cometo-Sheath: Empirical Rates of Ionization, Diffusion, Loss and Creation of Fast Neutral Atoms
The shape of the velocity distribution of water-group ions observed by the Giotto ion mass spectrometer on its approach to comet Halley is modeled to derive empirical values for the rates on ionization, energy diffusion, and loss in the mid-cometosheath.
rate ion mass spectrometer comet Halley↗
Intermittent Turbulence in Solar Wind from the South Polar Hole
The magnetic fields measured by the Ulyses spacecraft are used to study solar wind turbulence in the fast solar wind from the south polar hole.
components↗
Ulysses Observations of Solar Wind Temperatures and Anisotropies in the Ecliptic From 1 to 5 AU and Out of the Ecliptic
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solar wind temperatures solar wind anisotropies Ul↗
Hybrid Simulations of Acceleration of Pick-Up Ions at the Heliospheric Termination Shock
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cosmic rays pick-up ions solar wind termination sh↗
Ulysses Near-Ecliptic Observations of Differential Flow Between Protons and Alphas in the Solar Wind
Describes the solar wind plasma experiment on the Ulysses spacecraft over the solar range of 1.15 to 5.40 AU between Nov. 18, 1990 and May 5, 1992.
Protons↗
Investigation of Possible Electromagnetic Disturbances Caused by Spacecraft-Plasma Interactions at 4 R Subscript s Small Solar Probe
The proposed Small Solar Probe mission features a close approach to the sun with a perihelion of 4 R subscript s. Carbon molecules emitted from the spacecraft's heat shield will become ionized by electron impact and photoionization.
Small Solar Probe electromagnetic and electro-stat↗
Numerical Solution of Wave Equations for the Stability of Inner Cometo-Sheath
Numerical solution of the MHD wave equations for stability of the cometary sheath determined by the balance between the inward Lorentz body force and the outward ion-neutral drag force is obtained by using a two-point boundary value method.
comets↗
Ulysses Observations of a Recurrent High-Speed Solar Wind Stream and the Heliomagnetic Streamer Belt
Near-ecliptic solar wind observations by Ulysses on its way to the polar regions of the Sun, compared with those from IMP 8 at 1 AU, showed that high-speed streams decay and broaden with heliocentric distance from IMP to Ulysses, as expected.
Ulysses↗
Acceleration of Cometary H 2 0 Group Pickup Ions by Obliquely Propagating Nonlinear Magnetosonic Waves
The observations made during the encounter with comet Giacobini Zinner show that the character of MHD turbulence is governed by the magnetosonic (MS) waves generated by the pickup ions via a resonant cyclotron instability. We have performed the test particle calculations to study wave particle interactions via cyclotron resonance of water group cometary ions with (1) linearly polarized monochromatic MS waves, (2) circularly polarized monochromatic MS waves, and (3) magnetic fluctuations consisting of MS waves with a power spectrum which varies as 1 / k 2 .
magnetosonic↗
Scientific objectives of a Solar Probe mission
The Solar Probe is a mission of exploration and discovery in an uninvestigated region near the sun. The Solar Probe can enhance general understanding of the corona and the solar wind. The first in situ measurements of coronal particles and fields are expected to provide definitive discriminators among many currently proposed models of processes that shape the structure and dynamics of the outer corona and solar wind. In addition, observations of the development of turbulence, nonlinear wave processes, plasma heating, and particle acceleration in the corona can advance these areas of plasma physics in a regime neither duplicated by earth-based laboratories nor by previous space exploration. It also fills the last gap between knowledge of the terrestrial response to solar output as well as provide insight for interpreting observations of general stellar envelopes.
Feldman, W.↗
High-power AlGaAs channeled substrate planar diode lasers for spaceborne communications
A high power channeled substrate planar AlGaAs diode laser with an emission wavelength of 8600 to 8800 A was developed. The optoelectronic behavior (power current, single spatial and spectral behavior, far field characteristics, modulation, and astigmatism properties) and results of computer modeling studies on the performance of the laser are discussed. Lifetest data on these devices at high output power levels is also included. In addition, a new type of channeled substrate planar laser utilizing a Bragg grating to stabilize the longitudinal mode was demonstrated. The fabrication procedures and optoelectronic properties of this new diode laser are described.
Connolly, J. C.↗
Efficient AlGaAs channeled-substrate-planar distributed feedback laser
A wavelength-locked, AlGaAs channeled-substrate-planar distributed feedback laser has been made that operates to 40 mW pulsed. The Bragg grating is situated at the shoulders of the layers of AlGaAs and GaAs. Overall power efficiencies of 15 percent have been measured at 40 mW of output power.
Goldstein, B.↗
AlGaAs heterojunction lasers
The characterization of 8300 A lasers was broadened, especially in the area of beam quality. Modulation rates up to 2 Gbit/sec at output powers of 20 mW were observed, waveform fidelity was fully adequate for low BER data transmission, and wavefront measurements showed that phase aberrations were less than lamda/50. Also, individually addressable arrays of up to ten contiguous diode lasers were fabricated and tested. Each laser operates at powers up to 30 mW CW in single spatial mode. Shifting the operating wavelength of the basic CSP laser from 8300 A to 8650 A was accomplished by the addition of Si to the active region. Output power has reached 100 mW single mode, with excellent far field wave front properties. Operating life is currently approx. 1000 hrs at 35 mW CW. In addition, laser reliability, for operation at both 8300 A and 8650 A, has profited significantly from several developments in the processing procedures.
Goldstein, B.↗