177 research outputs found
Ion laser plasmas
Get PDFThe typical noble gas ion laser plasma consists of a high-current-density glow discharge in a noble gas, in the presence of a magnetic field. Typical CW plasma conditions are current densities of 100 to 2000 A/cm^2, tube diameters of 1 to 10 mm, filling pressures of 0.1 to 1.0 torr, and an axial magnetic field of the order of 1000 G. Under these conditions the typical fractional ionization is about 2 percent and the electron temperature between 2 and 4 eV. Pulsed ion lasers typically use higher current densities and lower operating pressures.
This paper discusses the properties of ion laser plasmas, in terms of both their external discharge parameters and their internal ion and excited state densities. The effect these properties have on laser operation is explained. Many interesting plasma effects, which are important in ion lasers, are given attention. Among these are discharge nonuniformity near tube constrictions, extremely high ion radial drift velocities, wall losses intermediate between ambipolar diffusion and free fall, gas pumping effects, and radiation trapping. The current status of ion laser technology is briefly reviewed
Effect of humidity on milk production and composition, feed and water consumption, and body weight in cattle.
Get PDFMissouri Agricultural Experiment Station and the United States Department of Agriculture, cooperating."This bulletin is a report on the Department of Dairy Husbandry research project number 100 entitled 'Influence of climate factors on productivity'"--P. [2].Includes bibliographical references
A Dairy action program for Missouri : including the dairy industry 8-point program for 1944 and 1945
Get PDFCaption title.Digitized 2006 AES MoU.Includes bibliographical references (page 55)
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