| 21. |
Thermal expansion of a fused quartz tube in a dimensional stability test facility |
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Review of Scientific Instruments,
Volume 50,
Issue 4,
1979,
Page 502-506
E. G. Wolff,
S. A. Eselun,
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摘要:
A facility to monitor the dimensional stability of structures of arbitrary size or shape under varying temperature and pressure conditions is described. Real‐time linear displacements are measured with a modified Michelson laser interferometer to a resolution of less than one part in 107and an accuracy of ∼2 parts in 107for ∼1 m gauge lengths. Verification of the system accuracy with a quartz tube required considerations of its fabrication and compositional characteristics.
ISSN:0034-6748
DOI:10.1063/1.1135859
出版商:AIP
年代:1979
数据来源: AIP
|
| 22. |
Electronic detector for conducting particles and fibrils |
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Review of Scientific Instruments,
Volume 50,
Issue 4,
1979,
Page 507-508
R. D. Shelton,
J. A. Morrissey,
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PDF (102KB)
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摘要:
When small airborne conducting particles and fibrils strike a conducting surface with an electric charge distribution on it, they acquire charge and are repelled from the surface. If the conducting surface is connected to a power supply of constant potential, a charging pulse is observed as each particle or fibril makes contact with the surface. A collection of such charging pulses can be processed by a pulse height analyzer to yield information about the size and frequency of conducting airborne particles.
ISSN:0034-6748
DOI:10.1063/1.1135860
出版商:AIP
年代:1979
数据来源: AIP
|
| 23. |
Simple, reliable, and sensitive interferometer for the measurement of the refractive index of liquids as a function of temperature |
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Review of Scientific Instruments,
Volume 50,
Issue 4,
1979,
Page 509-510
D. Beysens,
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PDF (129KB)
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摘要:
We describe a very simple and inexpensive interferometer setup which provides high accuracy measurements of the refractive index (n) of liquids with temperature. A standard deviation &sgr; (n) =5.4×10−7has been observed in isooctane liquid when fittingnto a linear temperature variation.
ISSN:0034-6748
DOI:10.1063/1.1135861
出版商:AIP
年代:1979
数据来源: AIP
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| 24. |
Image reduction to submicrometer dimensions by asymmetric crystal reflection of x rays |
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Review of Scientific Instruments,
Volume 50,
Issue 4,
1979,
Page 510-512
S. Mardix,
A. R. Lang,
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PDF (229KB)
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摘要:
An image‐reduction method utilizing asymmetric Bragg reflection is demonstrated by 9.5‐fold and 22.6‐fold one‐dimensional reductions of a 30 cell/mm gold mesh having a web width of 8&mgr;m. Applicability of the method to microphotolithography is suggested.
ISSN:0034-6748
DOI:10.1063/1.1135862
出版商:AIP
年代:1979
数据来源: AIP
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| 25. |
Device for helical marking of cylindrical specimens |
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Review of Scientific Instruments,
Volume 50,
Issue 4,
1979,
Page 512-513
Alexander J. Domkowski,
Jo J. Burroughs,
James E. Nicholson,
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PDF (112KB)
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摘要:
A device is described for holding and scratching to variable depth, small diameter wires extruded from soft metals. Drawings and relative dimensions are shown. Adescription of the helical guide strips used in the device is also contained.
ISSN:0034-6748
DOI:10.1063/1.1135863
出版商:AIP
年代:1979
数据来源: AIP
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