摘要:

Josephson logic circuits using fluxoid quantization in a one‐junction interferometer to represent logical states have been fabricated from thin films of Nb by means of photolithography, electron beam lithography, and reactive ion etching. A variable thickness bridge is used as a Josephson junction in the one‐junction interferometer. The logic circuits have shown AND and OR logic functions.

ISSN:0003-6951    

DOI:10.1063/1.92845

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

The dynamics of two small‐capacitance, weakly coupled Josephson junctions are analyzed, including thermal noise. The phenomena of phase locking, line narrowing, and coherence emerge from the calculation, which provides the basis for a semiquantitative understanding of recent experimental work on this system.

ISSN:0003-6951    

DOI:10.1063/1.92846

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

The Nb3Sn layer growth rate, the upper critical field and the critical current density in high fields of the composite‐processed Nb3Sn are greatly enhanced by the titanium addition to the niobium core. This addition yields aJc(Nb3Sn layer) value of over 1×105A/cm2at 15 T. After the reaction, large amount of titanium is incorporated into the Nb3Sn layer. The optimal amount of titanium addition to the niobium core is about 2 at. %. The Nb‐Ti/Cu‐Sn composite wire seems to be quite promising for applications in magnetic fields up to at least 15 T.

ISSN:0003-6951    

DOI:10.1063/1.92847

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

Heating with pulsed or continuous CO2‐laser beams is shown to be an attractive means for rapid evaluation of discrete or continuous two‐dimensional arrays of small or thin thermoluminescent samples. Applications of the novel laser heating techniques to thermoluminescence imaging of spatial dose distributions of ionizing radiation and to the measurement of two‐dimensional temperature distributions in high‐laser power dielectric coating are discussed.

ISSN:0003-6951    

DOI:10.1063/1.92848

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

Vinylidene fluoride trifluoroethylene copolymer VDF‐TrFE was found to be pyroelectric when poled by application of dc high field. Temperature dependence of its pyroelectric response and the effects of poling conditions were investigated. It was shown that there existed a critical temperature at 70 °C above which pyroelectricity vanished. The pyroelectric coefficient increased with the increase in poling temperature with a tendency to saturation. The pyroelectric coefficient of these samples poled above 70 °C were constantly 9 nc/cm2 K, which is significantly larger than that of any other polymers.

ISSN:0003-6951    

DOI:10.1063/1.92849

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

The elastic sphere is shown to develop catastrophic pressures at its center in response to a finite square pulse input. Also shown is an unusual driving point input admittance function.

ISSN:0003-6951    

DOI:10.1063/1.92850

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

An electron optical focusing and deflection system for electron beam lithography has been developed which eliminates off‐axis aberrations up to the third order including transverse chromatic errors by means of a variable axis lens (VAL). Feasibility of the VAL concept has been established experimentally.

ISSN:0003-6951    

DOI:10.1063/1.92851

出版商:AIP    

年代:1981

数据来源: AIP

ISSN:0003-6951    

DOI:10.1063/1.92891

出版商:AIP    

年代:1981

数据来源: AIP