On the Electric Breakdown in Liquid Argon at Centimeter Scale

We present a study on the dependence of electric breakdown discharge properties on electrode geometry and the breakdown field in liquid argon near its boiling point. The measurements were performed with a spherical cathode and a planar anode at distances ranging from 0.1 mm to 10.0 mm. A detailed study of the time evolution of the breakdown volt-ampere characteristics was performed for the first time. It revealed a slow streamer development phase in the discharge. The results of a spectroscopic study of the visible light emission of the breakdowns complement the measurements. The light emission from the initial phase of the discharge is attributed to electro-luminescence of liquid argon following a current of drifting electrons. These results contribute to set benchmarks for breakdown-safe design of ionization detectors, such as Liquid Argon Time Projection Chambers (LAr TPC).

(Table 1) Mass-accumulation rates for the non-authigenic, inorganic, crystalline, eolian component of sediments recovered at DSDP Hole 62-463

Elevated regions in the central parts of ocean basins are excellent for study of accumulation of eolian material. The mass-accumulation rates of this sediment component appear to reflect changes in the influx of volcanic materials through the Early Cretaceous to Recent history of Deep Sea Drilling Project Site 463, on the Mid-Pacific Mountains. Four distinct episodes of eolian accumulation occurred during the Cretaceous: two periods of moderate accumulation, averaging about 0.2 to 0.3 g/cm**2/10**3 yr, 67 to 70.5 m.y. ago and 91 to 108 m.y. ago; a period of low accumulation, approximately 0.03 g/cm**2/10**3 yr, 70.5 to 90 m.y. ago; and a period of high accumulation, about 0.9 g/cm**2/10**3 yr, 109 to 117 m.y. ago (bottom of the hole). Much of the Cenozoic section is missing from Site 463. Upper Miocene to Recent sediments record an upward increase in accumulation rates, from less than 0.01 to about 0.044 g/cm**2/10**3 yr. The late Pliocene-Pleistocene peak may reflect the change to glacial-wind regimes, as well as an increase in volcanic source materials.

The breakdown of IRS tax enforcement regarding multinational corporations : revenue losses, excessive litigation, and unfair burdens for U.S. producers : hearing before the Committee on Governmental Affairs, United States Senate, One Hundred Third Congress, first session, March 25, 1993.

Shipping list no.: 93-0404-P.

The effects of intense gamma irradiation on electric breakdown in helium /

"Physics Development Department, Tracerlab, Incorporated, Reactor Monitoring Center."

Development of a digital model of ground-water flow in deeply weathered crystalline rock, Chester County, Pennsylvania /

"August 1980."

Drinking-water quality and variations in water levels in the fractured crystalline-rock aquifer, west-central Jefferson County, Colorado /

Mode of access: Internet.

The secret of pictorial art, or, Self-instructor in painting on glass, china, satin and paper : it teaches the oil photo-miniature, Grecian oil, antique, oriental, crystal and pastel paintings, crystalline, decalcomanie and diaphanie transferring /

Includes index.

Cellulose and cellulose derivatives.

Vols. 4-5 have imprint: New York, Wiley-Interscience.

The cellulose-water relationship in paper-making,

Mode of access: Internet.