A device for cutting the time tail from spallation neutron pulses

被引：3

作者：

Langan, P ^{[1
]}

Schoenborn, BP ^{[1
]}

Daeman, LL ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA

来源：

NEUTRON OPTICS | 2001年 / 4509卷

关键词：

spallation neutron source; pulsed beam; time-tail; tail-cutting; coupled moderator; multi-layer; protein crystallography; Monte Carlo; Los Alamos Neutron Science Center; chopper;

D O I：

10.1117/12.448077

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页码：66 / 72

页数：7