摘要:

The power densities that liquid metal cooling is capable of are explored. The advantages of liquid metals over conventional water cooling are shown. The presentation is such that one can choose between the available coolants for any particular application with a minimum of background. The work done at the General Electric Research Laboratory in developing a vacuum tube anode capable of handling 5 kw/cm2is covered.

ISSN:0021-8979    

DOI:10.1063/1.1721154

出版商:AIP    

年代:1953

数据来源: AIP

摘要:

Absolute photoelectric yields of Pt and Ta and photoionization yields in O2and N2are reported for the spectral region from 436 to 1004 angstroms. The experimental methods as well as the monochromator, light source and associated apparatus are described. The results for Pt and Ta give photoelectric yields between 10−1and 10−2electron per photon for wavelengths shorter than 1000A. These values are 10 to 100 times larger than those obtained for the same metals between 2000A and 3000A. Photoionization results for O2indicate that below 700A almost all absorbed photons produce ion pairs, while in the region between 700A and the first ionization limit at 1000A the yield varies rapidly. In the case ofN2at wavelengths shorter than 796A, its first ionization limit, the yield rises steeply. Below 725A almost all absorbed photons produce ion pairs. The over‐all error is estimated to be within ±20 percent.

ISSN:0021-8979    

DOI:10.1063/1.1721155

出版商:AIP    

年代:1953

数据来源: AIP

摘要:

The work of many investigators has strongly indicated that sigma phase is characterized by a certain averaged electronic structure. The characteristic was first thought to be the ``electron vacancy'' concentration in thedband, but it is now appreciated that the density of electrons outside the argon shells may also be a valid criterion. The latter characteristic is used here with the application of H. Jones' theory. The result shows a definite correlation between the homogeneity ranges and the x‐ray diffraction patterns for sigma phase and several other complicated structures which occur in alloys of transition metals.

ISSN:0021-8979    

DOI:10.1063/1.1721156

出版商:AIP    

年代:1953

数据来源: AIP

摘要:

The propagation constant &ggr;mnof them,nth mode in a gentle circular bend in a rectangular wave guide is derived with the use of matrix theory.

ISSN:0021-8979    

DOI:10.1063/1.1721157

出版商:AIP    

年代:1953

数据来源: AIP

摘要:

A type of electron flow in a constant magnetic field is described. The beam of electrons is supposed to be everywhere in thermal equilibrium and the usual Brillouin flow is found when the equilibrium temperature tends to zero. Some considerations are put forward bearing on the choice of a suitable beam temperature in specific problems.

ISSN:0021-8979    

DOI:10.1063/1.1721158

出版商:AIP    

年代:1953

数据来源: AIP

ISSN:0021-8979    

DOI:10.1063/1.1721159

出版商:AIP    

年代:1953

数据来源: AIP

ISSN:0021-8979    

DOI:10.1063/1.1721161

出版商:AIP    

年代:1953

数据来源: AIP

ISSN:0021-8979    

DOI:10.1063/1.1721162

出版商:AIP    

年代:1953

数据来源: AIP

ISSN:0021-8979    

DOI:10.1063/1.1721163

出版商:AIP    

年代:1953

数据来源: AIP

ISSN:0021-8979    

DOI:10.1063/1.1721165

出版商:AIP    

年代:1953

数据来源: AIP