摘要:

An ion microprobe has been combined with a quadrupole equipped secondary ion mass spectrometer. Operating the microprobe in the raster scanning mode, ion images with a lateral resolution of about 10 &mgr; could be obtained. Moreover, the system provides stereoscopic imaging. In‐depth profiling capabilities of the instrument are also described briefly.

ISSN:0034-6748    

DOI:10.1063/1.1134472

出版商:AIP    

年代:1976

数据来源: AIP

摘要:

Faster and more accurate measurements of low level light sources such as LEED spot intensities are described. The method uses image intensification in a conventional spot photometer.

ISSN:0034-6748    

DOI:10.1063/1.1134473

出版商:AIP    

年代:1976

数据来源: AIP

摘要:

A phase lock technique for the measurement of small conductance changes at MHz frequencies is described. The method requires a stable Q meter having an analog output proportional to the Q and a lock‐in detector. The sensitivity is excellent, with changes as small as one part in 106having been easily observed.

ISSN:0034-6748    

DOI:10.1063/1.1134475

出版商:AIP    

年代:1976

数据来源: AIP

摘要:

The operation of a fast, high‐voltage vacuum spark gap is affected by the pumping speed after each shot. A simple means to prolong the gap lifetime is proposed.

ISSN:0034-6748    

DOI:10.1063/1.1134482

出版商:AIP    

年代:1976

数据来源: AIP

摘要:

A circuit which allows independent hold time for turbulent and nonturbulent states is presented and shown to provide a distortion‐free intermittency signal.

ISSN:0034-6748    

DOI:10.1063/1.1134503

出版商:AIP    

年代:1976

数据来源: AIP