| 11. |
NEW HIGH‐GAIN DYNODE FOR PHOTOMULTIPLIERS |
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Applied Physics Letters,
Volume 13,
Issue 10,
1968,
Page 355-356
R. E. Simon,
A. H. Sommer,
J. J. Tietjen,
B. F. Williams,
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摘要:
A new photomultiplier is described in which the recently reported GaP(Cs) material is used for the first dynode to obtain high secondary emission gain. Gain factors of 20 to 40 have been measured resulting in greatly improved performance of the new photomultiplier at very low light levels.
ISSN:0003-6951
DOI:10.1063/1.1652468
出版商:AIP
年代:1968
数据来源: AIP
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| 12. |
PULSE HEIGHT RESOLUTION OF HIGH GAIN FIRST DYNODE PHOTOMULTIPLIERS |
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Applied Physics Letters,
Volume 13,
Issue 10,
1968,
Page 356-357
G. A. Morton,
H. M. Smith,
H. R. Krall,
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摘要:
The performance of a new photomultiplier with high‐gain GaP(Cs) first dynode is described. The photoelectron statistics are degraded by less than 5% as compared with 20% for conventional multipliers. The improved statistics make it possible, for the first time, to distinguish the emission of one, two, and up to five photoelectrons.
ISSN:0003-6951
DOI:10.1063/1.1652469
出版商:AIP
年代:1968
数据来源: AIP
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| 13. |
ABSOLUTE MEASUREMENT OF SECOND ORDER NONLINEAR COEFFICIENT FOR OPTICAL GENERATION OF MILLIMETER WAVE DIFFERENCE FREQUENCIES IN GaAs |
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Applied Physics Letters,
Volume 13,
Issue 10,
1968,
Page 357-359
T. Y. Chang,
N. VanTran,
C. K. N. Patel,
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摘要:
Millimeter wave difference frequencies are generated by mixing adjacent vibrational‐rotational lines of CO2laser in a GaAs‐filled waveguide designed for phase matched interactions. Absolute values of the nonlinear coefficient at these frequencies are obtained and are found to be larger than that given by the low‐frequency electrooptic coefficient.
ISSN:0003-6951
DOI:10.1063/1.1652470
出版商:AIP
年代:1968
数据来源: AIP
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| 14. |
SPATIAL RESOLUTION MEASUREMENTS IN UP‐CONVERSION FROM 10.6 m TO THE VISIBLE |
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Applied Physics Letters,
Volume 13,
Issue 10,
1968,
Page 360-362
J. Warner,
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摘要:
10.6‐&mgr;m radiation from a pair of point sources at optical infinity has been mixed with collimated ruby‐laser radiation in Proustite. The sum‐frequency radiation at 6516 Å so produced was then focused with a camera lens to form a visible image of the infrared sources. With a pump‐laser beam divergence of 1.2 mrad the minimum resolvable angular separation of the infrared sources was 15 mrad according to the Rayleigh criterion.
ISSN:0003-6951
DOI:10.1063/1.1652471
出版商:AIP
年代:1968
数据来源: AIP
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| 15. |
ENHANCED STRAIN AMPLITUDE DEPENDENCE OF INTERNAL FRICTION IN THE MIXED STATE OF NIOBIUM |
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Applied Physics Letters,
Volume 13,
Issue 10,
1968,
Page 362-364
Edward J. Kramer,
Charles L. Bauer,
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摘要:
Strain amplitude dependence of internal friction was measured as a function of the magnetic state in a niobium single crystal. An enhanced dependence is observed in the mixed state, which is attributed to compression and subsequent breakaway of fluxoids from moving dislocations.
ISSN:0003-6951
DOI:10.1063/1.1652472
出版商:AIP
年代:1968
数据来源: AIP
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