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  • 1
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    Determination of the structure and heating mechanisms of coronal loops from soft X-ray observations with the solar probe (1978)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: High resolution soft X-ray imaging from the solar probe is justified in terms of the expected scientific returns which include the determination of the temperature and density structure of a coronal loop. The advantages of the grazing incidence telescope over the multiple pinhole camera are discussed. An instrument package is described which includes a grazing incidence mirror, a thermal prefilter, a three position filter wheel and a focal plane detector baselined as an 800 by 800 back-illuminated charge coupled device. The structural assembly together with the data processing equipment would draw heavily on the designs being developed for the Solar Polar Mission.
    Keywords: SOLAR PHYSICS
    Type: JPL A Close-up of the Sun; p 94-110
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  • 2
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    Integrated steam systems for electric power generation from waste heat (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA. Washington Proc. of Conf. on Waste Heat Management and Util., Vol. 3; 15 p
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  • 3
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    Social aspects of regulating waste heat (1977)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA, Washington Proc. of the Conf. on Waste Heat Management and Util., Volume 1; 17 p
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  • 4
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    A study of the chemical degradation of ClONO2 in the stratosphere (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The flash photolysis-resonance fluorescence system described by Davis et al. (1974) is used to measure the rate constants for the reactions of chlorine nitrate (ClONO2) with stratospheric O(3-P) and OH. Both reactions are examined in a pyrex cell with an internal volume of about 150 cu cm, where the reaction mixture was maintained at 245 K by circulating methanol from a thermostated circulation bath through the outer jacket of the reaction cell. The relative chemical degradation rates as a function of altitude for both reactions are tabulated, which shows that the chemical degradation pathways contribute less than 10% to the total rate of ClONO2 destruction at altitudes less than 30 km. Since the concentration of ClONO2 is calculated to be near its maximum around 25 km and drops off very significantly at higher altitudes, it is concluded that the photochemical decomposition of ClONO2 in the stratosphere is by far the most important degradation path for this molecule.
    Keywords: ENVIRONMENT POLLUTION
    Type: Geophysical Research Letters; 4; Jan. 197
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  • 5
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    Boundary layer measurements of the OH radical in the vicinity of an isolated power plant plume - SO2 and NO2 chemical conversion times (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Direct measurements of the OH radical in the vicinity of an isolated power plant plume are reported. These measurements were used to estimate the conversion time of SO2 to H2SO4-sulfate aerosol via the initiating step OH + SO2 + M yields HSO3. Using the near-high-noon measured value of OH (9.5 million per cu cm), resulted in a 1/e conversion time of 1.4 days. The latter lifetime would correspond to a conversion rate of about 2%/hr. When the lifetime calculation was modified to take into consideration the OH diurnal cycle, the 1/e conversion time for SO2 was found to be 4.4 days, giving an apparent overall rate of conversion of about 0.7%/hr. Similar calculations carried out for the conversion of NO2 to NHO3 resulted in 1/e lifetimes for NO2 of 2-3 h for midday time periods.
    Keywords: ENVIRONMENT POLLUTION
    Type: Atmospheric Environment; 13; 8, 19; 1979
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  • 6
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    Dielectronic recombination rates, ionization equilibrium, and radiative energy-loss rates for neon, magnesium, and sulfur ions in low-density plasmas (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Results of detailed and systematic calculations are presented for the total dielectronic recombination rate coefficients for the ions of Ne, Mg, and S in a low-density predominantly hydrogen plasma. The new recombination rates are used to calculate solar corona ionization-equilibrium distributions of the ions. The most important effect of dielectronic recombination for ions in corona equilibrium is found to be a shift in the maximum-abundance temperatures toward higher temperatures, which are in some cases reduced from those predicted on the basis of the simple Burgess formula.
    Keywords: SOLAR PHYSICS
    Type: Astrophysical Journal; vol. 230
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  • 7
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    Comparison of flare bremsstrahlung resulting from energetic thermal and nonthermal electrons (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The paper investigates the behavior of the X-ray bremsstrahlung spectra resulting from two distinct types of electron distribution functions impinging on a target atmosphere during flare activity. A power-law distribution function is compared with two double-peaked Maxwellians. The results of these calculations show that it would be difficult to rule out multithermal interpretations for the emitted high-energy X-rays.
    Keywords: SOLAR PHYSICS
    Type: Solar Physics; 51; Jan
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  • 8
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    Solar wind stream structure during the early phase of solar cycles 20 and 21 (1978)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Keywords: SOLAR PHYSICS
    Type: Solar Physics; 60; Nov. 197
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  • 9
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    The relationship between solar activity and coronal hole evolution (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The relationship between coronal hole evolution and solar active regions during the Skylab period is examined. A tendency is found for holes to grow or remain stable when the activity nearby, seen as calcium plages and bright regions in X-rays, is predominantly large, long-lived regions. It is also found that there is a significantly higher number of small, short-lived active regions, as indicated by X-ray bright points, in the vicinity of decaying holes than there is near other holes. This is interpreted to mean that holes disappear at least in part because they become filled with many small scale, magnetically closed, X-ray emitting features. This interpretation, together with the observation that the number of X-ray bright points was much larger near solar minimum than it was during the Skylab period, provides a possible explanation for the disappearance of the large, near-equatorial coronal holes at the time of solar minimum.
    Keywords: SOLAR PHYSICS
    Type: Solar Physics; 60; Nov. 197
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  • 10
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    Adsorption bed models used in simulation of atmospheric control systems (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Two separate techniques were used to obtain important basic data for the adsorption of seven liquid and eight gaseous trace contaminants. A columetric system used in previous HSC studies was modified to determine the HSC capacity of all the contaminants. A second study of six of the liquids was performed in a gas chromatorgraph. The results of these two studies are reported in two parts. First, a brief summary of the chromatographic results are given. Second, a thesis is given which reports in some detail the results of the volumetric studies. Comparison of the data that are common to both studies are also included.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-CR-151875
    Format: application/pdf
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