The Thirty Kilowatt Continuous Input X‐Ray Equipment and High Constant Voltage Generating Plant of the Watters Memorial Research Laboratory at the California Institute of Technology
- Creators
- DuMond, Jesse W. M.
- Youtz, J. Paul
Abstract
This report describes in detail with photographs and cross‐sectional views an x-ray tube with a gyrating water‐cooled target which the authors have operated continuously for periods of hours at 287,000 volts and 105 milliamperes. The theoretical predictions of DuMond, Watson and Hicks as to the ratio of safe load in moving and fixed targets seems to be roughly fulfilled by these results. The computed power output in the form of x-rays alone is some 3/4 kilowatt. The report further describes in detail the power supply equipment consisting of a synchronous motor driven 40 kw motor generator set giving 150 cycle current both half-waves of which, after transformation to high voltage, are rectified by two thermionic valves (filament emission 2 amperes maximum) of our own design and construction here fully described. The powerful electrical filter system to reduce the ripple to a low value and some technical problems arising from the large power rating of the equipment as well as the facilities now almost completed for stabilizing and measuring precisely the high voltage supplied to the x‐ray tube are discussed. At the outset a brief indication of the program of research work projected for this set is given.
Additional Information
© 1937 American Institute of Physics. Received May 5, 1937. Nearly all the parts of the equipment here described were built in our own shops over a period of several years by the writers and their co-workers many of whom have since left this institute. Among those whom we wish especially to thank for their long continued, devoted and able assistance are Mr. Eric Howse, Mr. Bernard Locher, Mr. Lowell Hand, Mr. William Pickels and Dr. Vernon Bollman. We are grateful also for the briefer but equally generous aid given by Mr. William Harper and Mr. Maxwell Kelch. The equipment we have described is known as the Watters Memorial Laboratory equipment of California Institute of Technology. The funds which made the construction of this equipment possible and which have for several years also supported a number of pieces of experimental research in pure physics were given to this Institute by Dr. Leon L. Watters of New York City as a memorial to his wife Frances H. Watters and it is a pleasure to here express our gratitude for his generous gift.Attached Files
Published - 1.1752317.pdf
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Additional details
- Eprint ID
- 46456
- Resolver ID
- CaltechAUTHORS:20140624-075853098
- Leon L. Watters
- Created
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2014-06-24Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field