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Title: Pulsed-neutron monochromator

Abstract

In one aspect, the invention is an improved pulsed-neutron monochromator of the vibrated-crystal type. The monochromator is designed to provide neutron pulses which are characterized both by short duration and high density. A row of neutron-reflecting crystals is disposed in a neutron beam to reflect neutrons onto a common target. The crystals in the row define progressively larger neutron-scattering angles and are vibrated sequentially in descending order with respect to the size of their scattering angles, thus generating neutron pulses which arrive simultaneously at the target. Transducers are coupled to one end of the crystals to vibrate them in an essentially non-resonant mode. The transducers propagate transverse waves in the crystal which progress longitudinally therein. The wave are absorbed at the undriven ends of the crystals by damping material mounted thereon. In another aspect, the invention is a method for generating neutron pulses characterized by high intensity and short duration.

Inventors:
 [1]
  1. (Oak Ridge, TN)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
865605
Patent Number(s):
4543230
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
pulsed-neutron; monochromator; aspect; improved; vibrated-crystal; type; designed; provide; neutron; pulses; characterized; duration; density; row; neutron-reflecting; crystals; disposed; beam; reflect; neutrons; common; target; define; progressively; larger; neutron-scattering; angles; vibrated; sequentially; descending; respect; size; scattering; generating; arrive; simultaneously; transducers; coupled; vibrate; essentially; non-resonant; mode; propagate; transverse; waves; crystal; progress; longitudinally; therein; wave; absorbed; undriven; damping; material; mounted; thereon; method; intensity; mounted thereon; transverse waves; neutron beam; provide neutron; neutron pulses; scattering angle; material mounted; pulsed-neutron monochromator; resonant mode; generating neutron; common target; /376/250/976/

Citation Formats

Mook, Jr., Herbert A. Pulsed-neutron monochromator. United States: N. p., 1985. Web.
Mook, Jr., Herbert A. Pulsed-neutron monochromator. United States.
Mook, Jr., Herbert A. Tue . "Pulsed-neutron monochromator". United States. https://www.osti.gov/servlets/purl/865605.
@article{osti_865605,
title = {Pulsed-neutron monochromator},
author = {Mook, Jr., Herbert A.},
abstractNote = {In one aspect, the invention is an improved pulsed-neutron monochromator of the vibrated-crystal type. The monochromator is designed to provide neutron pulses which are characterized both by short duration and high density. A row of neutron-reflecting crystals is disposed in a neutron beam to reflect neutrons onto a common target. The crystals in the row define progressively larger neutron-scattering angles and are vibrated sequentially in descending order with respect to the size of their scattering angles, thus generating neutron pulses which arrive simultaneously at the target. Transducers are coupled to one end of the crystals to vibrate them in an essentially non-resonant mode. The transducers propagate transverse waves in the crystal which progress longitudinally therein. The wave are absorbed at the undriven ends of the crystals by damping material mounted thereon. In another aspect, the invention is a method for generating neutron pulses characterized by high intensity and short duration.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

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