| 41. |
An Automatic Data Acquisition System for Calorimetry: The Specific Heat of &agr;‐Al2O3between 300 and 470 K |
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Review of Scientific Instruments,
Volume 41,
Issue 12,
1970,
Page 1869-1876
Douglas L. Martin,
Robert L. Snowdon,
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摘要:
The data acquisition system, using a commercially available automatic ac bridge, digital voltmeter, and transistorized digital logic modules, is suitable for both discrete and continuous heating calorimetry. The output, via a Teletype, is a printed record and punched paper tape. The total cost of parts was less than $25 000. The computer program to handle the output is described. As an illustration of the operation of the system the results of measurements in the range 300–470 K on the calorimetric standard sample &agr;‐Al2O3are given. The measurements, having a precision of ±0.1%, were made in an improved form of the calorimeter described by Martin and Snowdon [Can. J. Phys.44, 1449 (1966)]. Agreement with the latest National Bureau of Standards results (Ditmars and Douglas) is around 0.1% when they are corrected to the same temperature scale. The effect of heater lead resistance on the results has been experimentally determined.
ISSN:0034-6748
DOI:10.1063/1.1684432
出版商:AIP
年代:1970
数据来源: AIP
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| 42. |
The Dynamical Behavior of a Chopper‐Rotating Crystal System in a Neutron Time‐of‐Flight Experiment |
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Review of Scientific Instruments,
Volume 41,
Issue 12,
1970,
Page 1877-1879
O. J. Eder,
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PDF (133KB)
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摘要:
The installation of a phased chopper in front of a rotating crystal time‐of‐flight experiment is described. The results on the dynamics of the system, the background improvement, and the luminosity of the chopper rotating crystal spectrometer are presented. It is found that the significant background is reduced by a factor of 10, while the luminosity is decreased by about 10% only.
ISSN:0034-6748
DOI:10.1063/1.1684433
出版商:AIP
年代:1970
数据来源: AIP
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| 43. |
A Window Configuration for High Pressure Optical Cells |
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Review of Scientific Instruments,
Volume 41,
Issue 12,
1970,
Page 1880-1881
H. D. Stromberg,
R. N. Schock,
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PDF (170KB)
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ISSN:0034-6748
DOI:10.1063/1.1684434
出版商:AIP
年代:1970
数据来源: AIP
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| 44. |
A Transducer to Measure Forces under High Pressure |
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Review of Scientific Instruments,
Volume 41,
Issue 12,
1970,
Page 1881-1882
F. F. Westendorp,
A. G. Rijnbeek,
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PDF (167KB)
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ISSN:0034-6748
DOI:10.1063/1.1684435
出版商:AIP
年代:1970
数据来源: AIP
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| 45. |
Encapsulation of Helical Channel Multipliers for Space Flight Applications |
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Review of Scientific Instruments,
Volume 41,
Issue 12,
1970,
Page 1882-1883
George R. Carruthers,
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PDF (156KB)
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ISSN:0034-6748
DOI:10.1063/1.1684436
出版商:AIP
年代:1970
数据来源: AIP
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| 46. |
A New Device for Orienting and Cutting Metallic Crystals |
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Review of Scientific Instruments,
Volume 41,
Issue 12,
1970,
Page 1883-1885
K. Fowler,
B. N. Dey,
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PDF (200KB)
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ISSN:0034-6748
DOI:10.1063/1.1684437
出版商:AIP
年代:1970
数据来源: AIP
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| 47. |
A Continuously Nulling, Continuously Recording Capacitance Bridge |
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Review of Scientific Instruments,
Volume 41,
Issue 12,
1970,
Page 1885-1886
E. Sacher,
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PDF (157KB)
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ISSN:0034-6748
DOI:10.1063/1.1684438
出版商:AIP
年代:1970
数据来源: AIP
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| 48. |
Operation of GaAs LED's and Si Detectors at 4.2 K |
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Review of Scientific Instruments,
Volume 41,
Issue 12,
1970,
Page 1886-1887
J. C. Solinsky,
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PDF (153KB)
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ISSN:0034-6748
DOI:10.1063/1.1684439
出版商:AIP
年代:1970
数据来源: AIP
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| 49. |
An Automatic Delay Nonelectronic Trigger Generator for High Voltage Clamp Switches |
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Review of Scientific Instruments,
Volume 41,
Issue 12,
1970,
Page 1887-1888
Marvin P. Young,
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PDF (129KB)
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ISSN:0034-6748
DOI:10.1063/1.1684440
出版商:AIP
年代:1970
数据来源: AIP
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| 50. |
Subnanosecond Single‐Photoelectron Timing Resolution of the RCA C31000E Photo‐multiplier Using Ortec Constant Fraction Discriminators and Monsanto Light Emitting Diodes |
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Review of Scientific Instruments,
Volume 41,
Issue 12,
1970,
Page 1889-1890
R. S. Lakes,
S. K. Poultney,
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ISSN:0034-6748
DOI:10.1063/1.1684442
出版商:AIP
年代:1970
数据来源: AIP
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