RSI Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

Jun 1942

Volume 13, Issue 6, pp. 245-274


First Report of War Policy Committee

Rev. Sci. Instrum. 13, 245 (1942); http://dx.doi.org/10.1063/1.1770025 (3 pages)

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable

Some Operating Characteristics of the Wilson Cloud Chamber

Wayne E. Hazen

Rev. Sci. Instrum. 13, 247 (1942); http://dx.doi.org/10.1063/1.1770026 (11 pages) | Cited 18 times

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Show Abstract
The following characteristics of cloud‐chamber behavior were studied: (a) the dependence of minimum pressure on expansion time, (b) the ion threshold expansion ratio as a function of expansion time, (c) the sensitive time and its dependence on the percent expansion, (d) the rate of pressure rise after completion of a fast expansion, and (e) the rate of drop growth in N2, H2, and He with vapor from 95 percent C2H5OH or a liquid mixture of one part H2O to three parts C2H5OH. The experiments were performed with large cloud chambers (30‐cm diameter and 10‐ to 30‐cm depth) filled, in most cases, with N2 as the permanent gas and with the vapor from a 1 : 3 liquid mixture of H2O and C2H5OH. (a) The minimum pressure is found to be proportional to the square root of the expansion time. (b) The ion threshold expansion ratio increases linearly with expansion time. (c) The sensitive time increases with expansion ratio, reaches a maximum when the general background becomes appreciable, and approaches zero for higher expansion ratios. (d) The initial pressure rise after completion of an expansion is proportional to the square root of the time. (e) The surface area of a drop increases linearly with time in all cases. The temperature of a drop calculated from the rate of growth and from thermal constants is much lower for H2 and He than for N2. The results in (a), (b), (c), and (d) agree with results predicted by Williams' equations or equations obtained from similar considerations. The results for the rate of growth in (e) are in reasonable accord with values calculated from the diffusion equation.

A Complete Proportional Counter Arrangement for Cosmic‐Ray Measurements

Paul Weisz and W. E. Ramsey

Rev. Sci. Instrum. 13, 258 (1942); http://dx.doi.org/10.1063/1.1770027 (7 pages) | Cited 3 times

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Show Abstract
An apparatus which has served successfully to study the ionizing capacity of individual particles of the cosmic radiation is described. The analyzing chamber is a carefully designed proportional counter tube filled with purified argon. Although this counter is working continuously, the amplifier has zero sensitivity unless a ray passes through a pre‐determined path in the counter. This control is accomplished by a system of Geiger‐Müller counters operating as a conventional telescope which ``turns on'' the amplification and recording mechanism for a period of time beginning with the passage of the ray and ending approximately 4×10−4 sec. later. During this time the amount of charge released in the proportional counter by this ray, and only this ray, is recorded. Certain general principles of proportional counter mechanism are discussed.
back to top
RSS Feeds

A Micro‐Gas‐Analyzer

P. F. Scholander

Rev. Sci. Instrum. 13, 264 (1942); http://dx.doi.org/10.1063/1.1770028 (3 pages) | Cited 1 time

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable
back to top
RSS Feeds

The Use of Elkonite for Cyclotron Ion Sources

B. R. Curtis and R. S. Bender

Rev. Sci. Instrum. 13, 266 (1942); http://dx.doi.org/10.1063/1.1770029 (1 page) | Cited 5 times

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable

Sealing Mica to Glass or Metal to Form a Vacuum‐Tight Joint

J. S. Donal

Rev. Sci. Instrum. 13, 266 (1942); http://dx.doi.org/10.1063/1.1770030 (2 pages) | Cited 1 time

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable

Sealing Quartz Windows on Pyrex Tubes

Sidney W. Benson

Rev. Sci. Instrum. 13, 267 (1942); http://dx.doi.org/10.1063/1.1770031 (3 pages) | Cited 7 times

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable
back to top
RSS Feeds
back to top New Instruments

New Instruments

Wm. F. Roeser

Rev. Sci. Instrum. 13, 269 (1942); http://dx.doi.org/10.1063/1.1770032 (4 pages)

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable
back to top New Materials

New Materials

A. R. Olpin

Rev. Sci. Instrum. 13, 272 (1942); http://dx.doi.org/10.1063/1.1770033 (3 pages)

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close