Performance of the prototype LANL solid deuterium ultra-cold neutron source

Citation
Re. Hill et al., Performance of the prototype LANL solid deuterium ultra-cold neutron source, NUCL INST A, 440(3), 2000, pp. 674-681
Citations number
3
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
440
Issue
3
Year of publication
2000
Pages
674 - 681
Database
ISI
SICI code
0168-9002(20000211)440:3<674:POTPLS>2.0.ZU;2-R
Abstract
A prototype of a solid deuterium (SD2) source of Ultra-Cold Neutrons (UCN) is currently being tested at LANSCE. The source is contained within an asse mbly consisting of a 4 K polyethylene moderator surrounded by a 77 K beryll ium flux trap in which is embedded a spallation target. Time-of-flight meas urements have been made of the cold neutron spectrum emerging directly from the flux trap assembly. A comparison is presented of these measurements wi th results of Monte Carlo (LAHET/MCNP) calculations of the cold neutron flu xes produced in the prototype assembly by a beam of 800 MeV protons inciden t on the tungsten target. A UCN detector was coupled to the assembly throug h a guide system with a critical velocity of 8 m/s (Ni-58). The rates and t ime-of-flight data from this detector art: compared with calculated values. Measurements of UCN production as a function of SD. volume (thickness) are compared with predicted values. The dependence of UCN production on SD, te mperature and proton beam intensity are also presented. (C) 2000 Elsevier S cience B.V. All rights reserved.