A 40-centimeter trochoidal-type mass spectrometer

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Material Information

Title:
A 40-centimeter trochoidal-type mass spectrometer trochotron
Series Title:
United States. Atomic Energy Commission. MDDC ;
Alternate Title:
Trochotron
Physical Description:
1 p. : ; 27 cm.
Language:
English
Creator:
Monk, G. W
Graves, J. D
Horton, J. L
Tennessee Eastman Corporation
U.S. Atomic Energy Commission
Publisher:
Technical Information Division, Atomic Energy Commission
Place of Publication:
Oak Ridge, Tenn
Publication Date:

Subjects

Subjects / Keywords:
Trochotrons   ( lcsh )
Mass spectrometry   ( lcsh )
Genre:
federal government publication   ( marcgt )
bibliography   ( marcgt )
technical report   ( marcgt )
non-fiction   ( marcgt )

Notes

Bibliography:
Includes bibliographic reference.
Restriction:
"Date Declassified: July 14, 1947"
Statement of Responsibility:
by G.W. Monk, J.D. Graves, and J.L. Horton.
General Note:
Manhattan District Declassified Code
General Note:
"Date of Manuscript: April 2, 1947"

Record Information

Source Institution:
University of Florida
Rights Management:
All applicable rights reserved by the source institution and holding location.
Resource Identifier:
aleph - 005023918
oclc - 277773382
System ID:
AA00009303:00001


This item is only available as the following downloads:


Full Text
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MDDC 1079



UNITED STATES ATOMIC ENERGY COMMISSION









A 40-CENTIMETER TROCHOIDAL-TYPE MASS SPECTROMETER: TROCHOTRON



by


G. W. Monk
J. D. Graves ev'c;
J. L. Horton s:-i. Rr



Tennessee Eastman Corporation










This document consists of 1 page.
Date of Manuscript: April 2, 1947
Date Declassified: July 14, 1947


This document is issued for official use.
Its issuance does not constitute authority
to declassify copies or versions of the
same or similar content and title
and by the same authors)




Technical Information Division, Oak Ridge Directed Operations

Oak Ridge, Tennessee


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A 40-CENTIMETER TROCHOIDAL-TYPE MASS SPECTROMETER: TROCHOTRON


By G. W. Monk, J. D. Graves, and J. L. Horton








A large mass spectrometer in which the ion paths are prolate trochoids has been built, foi-
lowing the design principle of Bleakney and Hippie,* and has been in operation for several months.
This "trochotron" uses the theoretically perfect double-focussing properties of crossed uniform
electric an4 magnetic fields. The distance between the source and receiver slits in the grounded
plate is 40 cm, while in most other particulars the construction is similar to the prolate instru-
ment described by Bleakney and Hippie. An all-metal vacuum system is employed. An internal
voltage divider is used for the aluminum pictureb frames" that establish the electrostatic field.
Operation with collector currents as high as 0.3 microampere has been entirely satisfactory
for masses up to Ce 140, which was the heaviest element studied extensively. The resolution is
approximately one-half the value expected from geometrical consideration using slits 0.020 inch
wide and 3 inches long.

Modifications of the apparatus are to be used in separation of stable isotopes in pure micro-
gram quantities and isotopic analysis.
The original instrument was designed and constructed under the direction of W. A. Arnold,
J. D. Trimmer, and H. W. Savage.



















Bleakney and Hippie, Phys. Rev. 53, 521 (1938).

MDDC 1079 I




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