A device for cutting the time tail from spallation neutron pulses

Paul Langan; Benno P. Schoenborn; Luke L. Daemen

doi:10.1117/12.448077

A device for cutting the time tail from spallation neutron pulses

Paul Langan, Benno P. Schoenborn, Luke L. Daemen

Research output: Contribution to journal › Conference article › peer-review

3 Scopus citations

Abstract

The presence of long time tails in the neutron pulse produced by spallation sources is sometimes a problem in that it leads to background and can diminish the resolving power of the spectrometer. This problem is potentially severe with coupled moderators that are capable of providing increased intensity but at the cost of longer tails. The simple device we propose here is based on rocking a stack of multi-layers in the incident beam to attenuate these tails in a given band of incident wavelengths. The device and its operation are described and we present the results of Monte Carlo simulations.

Original language	English
Pages (from-to)	66-72
Number of pages	7
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4509
DOIs	https://doi.org/10.1117/12.448077
State	Published - 2001
Externally published	Yes
Event	Neutron Optics - San Diego, CA, United States Duration: Aug 2 2001 → Aug 2 2001

Keywords

Chopper
Coupled moderator
Los Alamos Neutron Science Center
Monte Carlo
Multi-layer
Protein crystallography
Pulsed beam
Spallation neutron source
Tail-cutting
Time-tail

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10.1117/12.448077

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title = "A device for cutting the time tail from spallation neutron pulses",

abstract = "The presence of long time tails in the neutron pulse produced by spallation sources is sometimes a problem in that it leads to background and can diminish the resolving power of the spectrometer. This problem is potentially severe with coupled moderators that are capable of providing increased intensity but at the cost of longer tails. The simple device we propose here is based on rocking a stack of multi-layers in the incident beam to attenuate these tails in a given band of incident wavelengths. The device and its operation are described and we present the results of Monte Carlo simulations.",

keywords = "Chopper, Coupled moderator, Los Alamos Neutron Science Center, Monte Carlo, Multi-layer, Protein crystallography, Pulsed beam, Spallation neutron source, Tail-cutting, Time-tail",

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year = "2001",

doi = "10.1117/12.448077",

language = "English",

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pages = "66--72",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

issn = "0277-786X",

publisher = "Society of Photo-Optical Instrumentation Engineers",

note = "Neutron Optics ; Conference date: 02-08-2001 Through 02-08-2001",

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TY - JOUR

T1 - A device for cutting the time tail from spallation neutron pulses

AU - Langan, Paul

AU - Schoenborn, Benno P.

AU - Daemen, Luke L.

PY - 2001

Y1 - 2001

N2 - The presence of long time tails in the neutron pulse produced by spallation sources is sometimes a problem in that it leads to background and can diminish the resolving power of the spectrometer. This problem is potentially severe with coupled moderators that are capable of providing increased intensity but at the cost of longer tails. The simple device we propose here is based on rocking a stack of multi-layers in the incident beam to attenuate these tails in a given band of incident wavelengths. The device and its operation are described and we present the results of Monte Carlo simulations.

AB - The presence of long time tails in the neutron pulse produced by spallation sources is sometimes a problem in that it leads to background and can diminish the resolving power of the spectrometer. This problem is potentially severe with coupled moderators that are capable of providing increased intensity but at the cost of longer tails. The simple device we propose here is based on rocking a stack of multi-layers in the incident beam to attenuate these tails in a given band of incident wavelengths. The device and its operation are described and we present the results of Monte Carlo simulations.

KW - Chopper

KW - Coupled moderator

KW - Los Alamos Neutron Science Center

KW - Monte Carlo

KW - Multi-layer

KW - Protein crystallography

KW - Pulsed beam

KW - Spallation neutron source

KW - Tail-cutting

KW - Time-tail

UR - http://www.scopus.com/inward/record.url?scp=0035764852&partnerID=8YFLogxK

U2 - 10.1117/12.448077

DO - 10.1117/12.448077

M3 - Conference article

AN - SCOPUS:0035764852

SN - 0277-786X

VL - 4509

SP - 66

EP - 72

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

T2 - Neutron Optics

Y2 - 2 August 2001 through 2 August 2001

ER -

A device for cutting the time tail from spallation neutron pulses

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Keywords

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