Results 261 to 270 of about 1,056,664 (313)
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1967
Abstract : The pressure containment capability of a monobloc cylindrical chamber that remains elastic is limited by the mechanical strength of the chamber material to values of about 100,000 pounds per square inch. Higher pressures can be contained by using a shrink-fit construction or autofrettage and these techniques provide approximately twice the ...
Arnold E. Seigel, Victor C. Dawson
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Abstract : The pressure containment capability of a monobloc cylindrical chamber that remains elastic is limited by the mechanical strength of the chamber material to values of about 100,000 pounds per square inch. Higher pressures can be contained by using a shrink-fit construction or autofrettage and these techniques provide approximately twice the ...
Arnold E. Seigel, Victor C. Dawson
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Double Chamber Partial Pressure Gauge
Journal of Vacuum Science and Technology, 1972A partial pressure gauge has been developed in which the interaction between the hot filament and the residual gases is virtually eliminated by placing the filament in an auxiliary vacuum chamber pumped separately. The electron beam passes through a small hole into the ionization chamber.
Rasskopf, K., Liebl, H., Blauth, E.
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Nuclear Instruments and Methods, 1973
Abstract Dependence of a spark chamber detection efficiency on a gas pressure was investigated at pressures lower than 1 atm. Results are explained by considering not all of seed electrons, but an effective part of them is accelerated in a gap length of the spark chamber.
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Abstract Dependence of a spark chamber detection efficiency on a gas pressure was investigated at pressures lower than 1 atm. Results are explained by considering not all of seed electrons, but an effective part of them is accelerated in a gap length of the spark chamber.
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Low-pressure helium spark chambers
Nuclear Instruments and Methods, 1968Abstract A spark chamber filled with a mixture of helium and alcohol vapour was exposed to 5.3-MeV α particles and 0.5-MeV β particles. The lowest pressure at which one can obtain defined sparks, was very dependent on gap size and alcohol concentration. With a gap of 1.6 cm and an alcohol concentration of 20% this pressure was 30 Torr.
T. Bunaciu, S. Kullander
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Review of Scientific Instruments, 1953
An expansion cloud chamber has been developed which operates at a pressure before the expansion of about 45 millimeters of mercury. Since evaporation is rapid and the temperature very low during the sensitive time of the chamber, the density of the gas is higher after the expansion than before.
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An expansion cloud chamber has been developed which operates at a pressure before the expansion of about 45 millimeters of mercury. Since evaporation is rapid and the temperature very low during the sensitive time of the chamber, the density of the gas is higher after the expansion than before.
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A high-pressure ionization chamber
Journal of Physics E: Scientific Instruments, 1977An ionization chamber has been constructed which enables electrode separations up to 100 mm and gas number densities up to 252*1024 m-3 to be employed. The initial photoelectric current was produced by back illumination of a thin metallic film evaporated on to a quartz disc inserted into the cathode.
J H Baker, A W Williams
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Negative Pressure Isopentane Bubble Chamber
Review of Scientific Instruments, 1956A negative pressure bubble chamber utilizing isopentane for the sensitive fluid is described. The chamber is of all glass construction which gives it a comparatively long sensitive time and allows the use of 90° stereophotography with consequent advantages in the speed and accuracy of analysis.
Irwin A. Pless, Richard J. Plano
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Perceptual Narrowing during Simulated Pressure-Chamber Exposure
Human Factors: The Journal of the Human Factors and Ergonomics Society, 1971In this study, 15 male subjects performed a central visual acuity task (Landolt ring detections) and a peripheral light detection task during what they thought to be a 60-ft. dive in a pressure chamber. There was no actual pressure change. A 15-man control group performed the same tasks at an outside location. Experimental measures included a posttest
G, Weltman, J E, Smith, G H, Egstrom
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Pressure Chamber Tests for Selection of Aircrew
ORL, 1984The Eustachian tube function requested from flying personnel today is generally regarded as acceptable if hearing and otoscopic findings are normal and there is no history of ear disease. Since increasing performance of modern aircrafts place more rigorous demands on the equilibrating capacity of the Eustachian tube and difficulty to clear the ears ...
P, Groth, O, Tjernström
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Pressure and Energy in the Cardiovascular Chambers
Chest, 1974Total fluid on hydraulic energy in a given chamber is the sum of potential on pressure energy, kinetic or flow energy and gravitational potential energy. The latter is equal in all chambers of the heart in the supine position, the position of the patient during cardiac catheterization, and therefore is ignored throughout the presentation.
P S, Rao, L M, Linde
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