Development of position-sensitive time-of-flight spectrometer for fission fragment research [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2014.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:: pages 53-58 : digital, PDF file
Additional Creators:: Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

A position-sensitive, high-resolution time-of-flight detector for fission fragments has been developed. The SPectrometer for Ion DEtermination in fission Research (SPIDER) is a 2E–2v spectrometer designed to measure the mass of light fission fragments to a single mass unit. The time pick-off detector pairs to be used in SPIDER have been tested with α-particles from 229Th and its decay chain and α-particles and spontaneous fission fragments from 252Cf. Each detector module is comprised of thin electron conversion foil, electrostatic mirror, microchannel plates, and delay-line anodes. Particle trajectories on the order of 700 mm are determined accurately to within 0.7 mm. Flight times were measured with 250 ps resolution FWHM. Computed particle velocities are accurate to within 0.06 mm/ns corresponding to a precision of 0.5%. As a result, an ionization chamber capable of 400 keV energy resolution coupled with the velocity measurements described here will pave the way for modestly efficient measurements of light fission fragments with unit mass resolution.

Report Numbers:

E 1.99:la-ur--14-21437
la-ur--14-21437

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Published through SciTech Connect.
07/09/2014.
"la-ur--14-21437"
": S0168900214008432"
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment 764 C ISSN 0168-9002 AM
C. W. Arnold; F. Tovesson; K. Meierbachtol; T. Bredeweg; M. Jandel; H. J. Jorgenson; A. Laptev; G. Rusev; D. W. Shields; M. White; R. E. Blakeley; D. M. Mader; A. A. Hecht.

Funding Information:

AC52-06NA25396

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