Particle size measurements using diffusion broadening spectroscopy

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/77135/1/AIAA-1980-21-202.pd

Two units in American history for use in grade XII

Thesis (M.A.)--Boston University, 1948. This item was digitized by the Internet Archive

The Electric Fields and "Lightning Jets" of the Sun and Solar Wind

A model of electric energization of the Solar Wind and Corona is developed, including electro-magnetic (EM) particle effects precluded by traditional magneto-hydro (MHD) assumptions. Using standard 1-D radial Solar models for particle density and temperature, the Core gravito-electric field is calculated; and the range of possible Photospheric photoelectric fields is estimated. These DC fields plausibly arise from about 500.Coulombs of charge displacement, mainly caused by the immense Solar energy flux pushing electrons outward. Energetically, these electric fields can accelerate surface protons out of the 2.keV gravity well and up to the 4. keV energies observed in the Fast Solar Wind. The electrical energy is released in pervasive, persistent "proton lightning jets", which are proton beams, charge-neutralized by co-propagating electrons. The jets are formed by pinched "avalanche breakdown" of resistivity, probably initiated on the down-welling edges of Solar surface granulations. These energetic jets will glow as discrete filamentary surface spicules, and will be observed in reflect solar light as the diffuse K-Corona. Significantly, the electric model exposes a new "virial limit": the observed Fast Wind speed occurs when the (positive) electrical potential energy at r=0 is as large as the 10.keV gravitational well at r=0.Comment: 24 pages, 6 figure

Thermally excited Trivelpiece–Gould modes as a pure electron plasma temperature diagnostic

Thermally excited plasma modes are observed in trapped, near-thermal-equilibrium pure electron plasmas over a temperature range of 0.05<kT<5 eV. The modes are excited and damped by thermal fluctuations in both the plasma and the receiver electronics. The thermal emission spectra together with a plasma-antenna coupling coefficient calibration uniquely determine the plasma (and load) temperature. This calibration is obtained from the mode spectra themselves when the receiver-generated noise absorption is measurable; or from separate wave reflection/absorption measurements; or from kinetic theory. This nondestructive temperature diagnostic agrees well with standard diagnostics, and may be useful for expensive species such as antimatter

Thermally excited fluctuations as a pure electron plasma temperature diagnostic

Thermally excited charge fluctuations in pure electron plasma columns provide a diagnostic for the plasma temperature over a range of 0.05 0.2, so that Landau damping is dominant and well modeled by theory. The third method compares the total (frequency-integrated) number delta N of fluctuating image charges on the wall antenna to a simple thermodynamic calculation. This method works when lambda(D)/R-p > 0.2

Inventory of forest and rangeland resources, including forest stress

The author has identified the following significant results. Road systems being developed within the Manitou, Colorado area for human habitation are readily discernible on the S192 normal-color photographs. These are dirt roads, some of which are about 20 feet wide. These data should provide the District Ranger of the Pike National Forest required information on the size and extent of these developing areas, information which he does not now have but is required for total management of the District

Inventory of forest and rangeland resources, including forest stress

There are no author-identified significant results in this report

Inventory of forest and rangeland resources, including forest stress

There are no author-identified significant results in this report

Inventory of forest and rangeland resources, including forest stress

There are no author-identified significant results in this report

Inventory of forest and rangeland resources, including forest stress

There are no author-identified significant results in this report