Depth-graded Multilayers as Neutron Doppler Converts At Pulsed Neutron Source

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A moving diffractor changes the energy of elastically diffracted neutrons by the Doppler effect. Depth-graded multilayers can diffract neutrons over a large band of energy. Using a pulsed neutron source, such a depth-graded multilayer, decelerating synchronously with the incident neutron pulse, can shift the reflected neutrons into a compressed energy window. This focusing in energy is associated with a broadening of the pulse in time, but the process does not involve a significant decrease in the neutron phase-space density. The proposed method can be used to design long pulse or quasi-continuous sources of cold, very cold or ultra cold neutrons ... continued below

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5 pages

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Stoica, A.D. July 26, 2001.

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A moving diffractor changes the energy of elastically diffracted neutrons by the Doppler effect. Depth-graded multilayers can diffract neutrons over a large band of energy. Using a pulsed neutron source, such a depth-graded multilayer, decelerating synchronously with the incident neutron pulse, can shift the reflected neutrons into a compressed energy window. This focusing in energy is associated with a broadening of the pulse in time, but the process does not involve a significant decrease in the neutron phase-space density. The proposed method can be used to design long pulse or quasi-continuous sources of cold, very cold or ultra cold neutrons (UCN). The analysis concentrates on enhanced production of UCN at pulsed neutron sources.

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5 pages

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  • SPIES Conference, Conference location not supplied, Conference dates not supplied

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  • Report No.: P01-111386
  • Grant Number: AC05-00OR22725
  • Office of Scientific & Technical Information Report Number: 788582
  • Archival Resource Key: ark:/67531/metadc716351

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  • July 26, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • March 11, 2016, 6:43 p.m.

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Stoica, A.D. Depth-graded Multilayers as Neutron Doppler Converts At Pulsed Neutron Source, article, July 26, 2001; Tennessee. (digital.library.unt.edu/ark:/67531/metadc716351/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.