RSI Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Next Issue

Jan 1939

Volume 10, Issue 1, pp. 1-43

back to top
RSS Feeds

A Recording Ionization Chamber—D.C. Amplifier System for Artificial Radioactive Decay Studies

S. W. Barnes

Rev. Sci. Instrum. 10, 1 (1939); http://dx.doi.org/10.1063/1.1751431 (5 pages) | Cited 4 times

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable

On Electronic Voltage Stabilizers

F. V. Hunt and R. W. Hickman

Rev. Sci. Instrum. 10, 6 (1939); http://dx.doi.org/10.1063/1.1751443 (16 pages) | Cited 37 times

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Show Abstract
Voltage stabilizing circuits employing thermionic tubes can be classified into four groups, according to their derivation from (1) the transconductance bridge, (2) the amplification factor bridge, (3) the simple degenerative amplifier, and (4) combination circuits involving two or more of the foregoing classes or utilizing amplified control voltages. It is shown that the variational performance of a stabilizer is characterized by an internal output resistance and a stabilization ratio. The effect of source resistance on these performance parameters is discussed in the general case and expressions for these parameters are evaluated for ten stabilizer circuits, seven of which are original with the authors. All but two of the circuits can be adjusted to yield perfect stabilization and four have also a very low internal resistance. Glow discharge tubes are discussed as bias battery substitutes. A simple a.c. bridge technique which is convenient for the experimental determination of stabilizer performance under normal load conditions is described in an appendix.

A Complete Geiger‐Müller Counting System

Harold Lifschutz

Rev. Sci. Instrum. 10, 21 (1939); http://dx.doi.org/10.1063/1.1751432 (6 pages) | Cited 9 times

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Show Abstract
Constructional details are given of a complete Geiger‐Müller counting system consisting of a stabilized high voltage supply, Neher‐Harper coupling circuit and vacuum‐tube scale‐of‐eight feeding a Cenco counter stage. The system is entirely a.c. operated. Its resolution time of 6.5×10−6 second allows it to follow the G‐M circuit without counting losses. The counting losses in the Cenco counter stage are negligible for random input rates to the system up to 20,000–30,000 counts a minute.

A Sensitive Differential Manometer

William Hurst

Rev. Sci. Instrum. 10, 27 (1939); http://dx.doi.org/10.1063/1.1751433 (3 pages) | Cited 1 time

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Show Abstract
A portable sensitive differential manometer is described. The instrument consists essentially of a train of gears from a small jeweled wrist watch movement and a drum covered with a rubber diaphragm. The design is such as to permit the measurement of rapid and slight variations of pressure. The pressure variations may be as small as 0.0012 cm of mercury and as rapid as 15 per second. The above sensitivity may be increased by a factor of approximately 10 by increasing the effective volume behind the moving diaphragm.

A High Speed Mechanical Recorder

H. Victor Neher

Rev. Sci. Instrum. 10, 29 (1939); http://dx.doi.org/10.1063/1.1751434 (3 pages) | Cited 3 times

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Show Abstract
A mechanical recorder is described having a resolving time of 0.8×10−3 sec. It will follow regularly spaced pulses at the rate of 1200 per sec. and should miss no more than one percent of pulses spaced random in time at an average counting rate of 10 per sec. A circuit is also described giving a pulse of short enough duration and at the same time of sufficient magnitude to satisfactorily operate the recorder.

Bent Crystal Transmission Spectrograph for Focusing Hard Radiation

H. Jupnik

Rev. Sci. Instrum. 10, 32 (1939); http://dx.doi.org/10.1063/1.1751435 (2 pages)

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable

An Experimental Study of the Sensitivity of a Geiger‐Müller Counter to a Narrow Beam of Gamma‐Rays

Donald L. Jorgensen

Rev. Sci. Instrum. 10, 34 (1939); http://dx.doi.org/10.1063/1.1751436 (3 pages) | Cited 3 times

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable

The True Temperature Scale of an Oxide‐Coated Filament

C. H. Prescott and James Morrison

Rev. Sci. Instrum. 10, 36 (1939); http://dx.doi.org/10.1063/1.1751437 (3 pages) | Cited 12 times

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Show Abstract
Following A. G. Worthing the spectral emissive power may be obtained from measurements of the reflection coefficient. This method is applicable to the oxide‐coated filament both at room temperature and at normal operating temperatures. For a particular type of filament containing dispersed nickel the reflection coefficient averaged 36 percent independent of temperature and independent of the degree of activation, i.e., the content of free alkaline earth metal.

A Wide‐Range Beat‐Frequency Oscillator

A. C. Hall

Rev. Sci. Instrum. 10, 38 (1939); http://dx.doi.org/10.1063/1.1751438 (4 pages)

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Show Abstract
A beat‐frequency oscillator is described which has a frequency range from 5 kilocycles to 1600 kilocycles, and a maximum power output of ten watts. Broad‐band amplifier principles are utilized in the design to obtain an output voltage substantially independent of frequency throughout the range of the oscillator.
back to top
RSS Feeds

Use of Kovar‐Glass Seal in an X‐Ray Cryostat

E. M. McNatt

Rev. Sci. Instrum. 10, 42 (1939); http://dx.doi.org/10.1063/1.1751439 (1 page) | Cited 1 time

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable

Observation of Voltage Pulse Masked by Hum

Eugene F. Coleman

Rev. Sci. Instrum. 10, 42 (1939); http://dx.doi.org/10.1063/1.1751440 (1 page)

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable

Grid Potential in the Neher‐Pickering Circuit

Allen W. Coven

Rev. Sci. Instrum. 10, 43 (1939); http://dx.doi.org/10.1063/1.1751441 (1 page) | Cited 3 times

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable

A Simple Protective Device for Vacuum Systems

M. C. Henderson

Rev. Sci. Instrum. 10, 43 (1939); http://dx.doi.org/10.1063/1.1751442 (1 page) | Cited 1 time

Online Publication Date: 27 December 2004

Full Text: | Download PDF

Abstract Unavailable
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close