摘要:

The plasma loss rate and certain transport coefficients of a dc discharge in the presence of turbulent argon‐gas flow are found to vary strongly with Reynolds number (Re). The loss rate increases by a factor of 15 as Re is increased from zero to 6300.

ISSN:0003-6951    

DOI:10.1063/1.1652848

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

The velocity‐field characteristic for electrons in GaAs has been measured in the negative differential mobility region between 4.5 and 11 kV/cm by a new direct method involving probe measurements on the surface of a bulk GaAs two‐port amplifier. The measurements were taken on GaAs of resistivity in the 500–1000 &OHgr;‐cm range.

ISSN:0003-6951    

DOI:10.1063/1.1652849

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

An optical‐spatial filtering technique for studying complex, high frequency, standing and traveling acoustic surface waves is described. The relative amplitude distribution is directly displayed, and the wavelength and velocity are accurately measured. The velocity for z propagation on a y‐cut LiNbO3crystal is found to be 3472.5 ± 1.5 m‐sec−1.

ISSN:0003-6951    

DOI:10.1063/1.1652850

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

Czochralski growth characteristics of a new laser host crystal, YAlO3, and measurements of its optical, thermal, and mechanical properties are reported. Stimulated emission from Nd3+in YAlO3has been observed.

ISSN:0003-6951    

DOI:10.1063/1.1652851

出版商:AIP    

年代:1969

数据来源: AIP

摘要:

Detailed measurements of the oscillation frequencies inn‐InSb at 77°K as a function of dc sample current and magnetic field are described. These show the existence of two modes of instabilities, which are in the ranges of 0.2 to 0.8 GHz and of a few to several tens of MHz, respectively.

ISSN:0003-6951    

DOI:10.1063/1.1652852

出版商:AIP    

年代:1969

数据来源: AIP