Henrikson, H. E. and DuMond, Jesse W. M. (1956) The Design, Construction, and Performance of a Magnetic Focusing, Semi-Circular, Low Energy Beta-Ray Spectrometer. , Pasadena, CA. (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20140629-192312570
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Abstract
A semi-circular beta-ray spectrometer (Fig. 1) has been constructed for operation between 2 and 120 kev electron energy. This instrument was designed to supplement the ring- focusing beta-ray spectrometer whose lower limit is approximately 25 kev. The 180° spectrometer has an electron trajectory radius of 12 cm. The field is produced by two iron free coils spaced to give a nearly homogeneous field (with some second order focusing) in the region of the electron trajectories . The field current is supplied by a one kw motor- generator set. Stabilization is obtained to 2 parts in 10, 000 with a rotating electro- mechanical unit and an electronic servo system. Source and Geiger counter window dimensions for a standard resolution of 0 .8% are 0.1 cm x 4 cm. With a 10 μ.g/cm^2 formvar window, transmission is assured down to 2 kev electron energy. A recording potentiometer traces the counting rate vs. electron energy. Several examples of chart recordings are reproduced to illustrate the performance of the semi- circular beta-ray spectrometer.
Item Type: | Report or Paper (Technical Report) | ||||
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Alternate Title: | Special Technical Report No. 24 | ||||
Funders: |
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Record Number: | CaltechAUTHORS:20140629-192312570 | ||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140629-192312570 | ||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||
ID Code: | 46560 | ||||
Collection: | CaltechAUTHORS | ||||
Deposited By: | Joy Painter | ||||
Deposited On: | 01 Jul 2014 19:22 | ||||
Last Modified: | 03 Oct 2019 06:45 |
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