摘要:

A thermal conductivity measurement cell is utilized as a high pressure gauge for hydrostatic media. It is based upon the pressure dependence of the thermal conductivity of the media. The gauge offers electrical readout and high sensitivity compared to a typical manganin resistance cell.

ISSN:0034-6748    

DOI:10.1063/1.1686240

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

A liquid nitrogen cold trap 140 cc in volume, constructed from glass and suitable for continuous operation is described. When the trap is operated automatically the liquid nitrogen consumption remains low at about 2 liters per day.

ISSN:0034-6748    

DOI:10.1063/1.1686241

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

An apparatus utilizing quartz thermometer probe as a fluid stirring agitator is described.

ISSN:0034-6748    

DOI:10.1063/1.1686242

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

A stainless steel quartz cell for infrared transmission spectrophotometry of catalyst wafers is described. Wafer temperatures can be varied over a range from 900 to −196°C. The spectral range covered depends on the window material; a variety of windows can be used. With a 5–10 mg catalyst wafer in place in the cell, pressures in the low 10−9Torr region have been attained.

ISSN:0034-6748    

DOI:10.1063/1.1686243

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

A target holder suitable for ultrahigh vacuum experimentation is described that allows rotation of the target about an axis perpendicular to its surface, in addition to the motions supplied by a commercial sample manipulator.

ISSN:0034-6748    

DOI:10.1063/1.1686244

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

Thin film Al&sngbnd;Al2O3&sngbnd;Au diodes were used as sources of low energy electrons (∼1 eV) in a drift velocityspectrometer. These diodes were found to offer several advantages over other sources used for electron mobility studies in dense gases and liquids.

ISSN:0034-6748    

DOI:10.1063/1.1686245

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

In this Note an active electronic matching circuit is described enabling one to make a proper ac and dc adjustment for a point‐contact diode. It is also possible to stabilize the bucking current to ensure constant detector sensistivity.

ISSN:0034-6748    

DOI:10.1063/1.1686246

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

An apparatus for measuring both the interfacial tension by the DuNouy ring method and the film elongation is described which uses a stepmotor to raise or lower the interface past the ring.

ISSN:0034-6748    

DOI:10.1063/1.1686247

出版商:AIP    

年代:1973

数据来源: AIP