Contribution of Residual Atmosphere Gases to the Flux of Collectively Accelerated Protons in a Luce Diode

AbstractThe scaling of the flux and maximum energy of laser-driven sheath-accelerated protons has been investigated as a function of laser pulse energy in the range of 15–380 mJ at intensities of 1016–1018 W/cm2. The pulse duration and target thickness were fixed at 40 fs and 25 nm, respectively, while the laser focal spot size and drive energy were varied. Our results indicate that while the maximum proton energy is dependent on the laser energy and laser spot diameter, the proton flux is primarily related to the laser pulse energy under the conditions studied here. Our measurements show that increasing the laser energy by an order of magnitude results in a more than 500-fold increase in the observed proton flux. Whereas, an order of magnitude increase in the laser intensity generated by decreasing the laser focal spot size, at constant laser energy, gives rise to less than a tenfold increase in observed proton flux.

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The mass spectrographic analysis of a residual atmosphere above silicon-705 in a 6-inch pump

Microelectronics Reliability ◽

10.1016/0026-2714(66)90140-5 ◽

1966 ◽

Vol 5 (2) ◽

pp. 188

Keyword(s):

Spectrographic Analysis ◽

Residual Atmosphere

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Capability of the accelerated protons as the origin of white-light emission of solar flare

10.22323/1.301.0150 ◽

2017 ◽

Author(s):

Kyoko Watanabe ◽

Satoshi Masuda ◽

Masanori Ohno

Keyword(s):

Solar Flare ◽

White Light ◽

Light Emission ◽

White Light Emission ◽

Accelerated Protons

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67Cu for metabolic studies in milk cows.

Netherlands Journal of Agricultural Science ◽

10.18174/njas.v24i3.17155 ◽

1976 ◽

Vol 24 (3) ◽

pp. 187-196

Author(s):

W.T. Binnerts ◽

J.C. Kapteyn ◽

L. Lindner

Keyword(s):

Large Scale ◽

Acidic Solution ◽

Scale Production ◽

Metabolic Studies ◽

Large Scale Production ◽

Metabolic Products ◽

Milk Cows ◽

Measurable Activity ◽

Accelerated Protons ◽

Large Animals

Primarily because of its half-life, the longest-lived radionuclide of copper, 67Cu (half-time 61.7 h), is often the isotope of choice for application in metabolic studies. However, large-scale production of 67Cu is cumbersome. The 67Cu used in this study was produced in a cyclotron by exposing a zinc target to a beam of accelerated protons. Radiochemical purification was achieved by solvent extraction, electroplating and ion-exchange, in that order. The resulting dilute acidic solution contained no measurable activity apart from 67Cu and 64Cu. After the injection in cows, the 64Cu component of the preparation of radiocopper could be used during the first days of the experiment for external radioassay of the liver. The 67Cu could be followed in metabolic products for over 3 weeks. It is concluded that the isotope 67Cu in batches of about 100 mu Ci can very well be used for metabolic excretion studies even on large animals. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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