A realistic guide misalignment model for the Second Target Station instruments at the Spallation Neutron Source

被引：3

作者：

Lin, Jiao Y. Y. ^{[1
]}

Huegle, Thomas ^{[2
]}

Coates, Leighton ^{[1
]}

Stoica, Alexandru Dan ^{[3
]}

机构：

[1] Oak Ridge Natl Lab, Target Stn Project 2, Oak Ridge, TN 37830 USA

[2] Oak Ridge Natl Lab, Neutron Technol Div, Oak Ridge, TN 37830 USA

[3] Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37830 USA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2023年 / 1047卷

关键词：

Neutron; Guide; Optics; Misalignment;

D O I：

10.1016/j.nima.2022.167881

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The Second Target Station (STS) at the Spallation Neutron Source, including a suite of initial instrument concepts, are being designed in Oak Ridge. The moderator size at STS is significantly smaller than that of the First Target Station, making the guide misalignment a more prominent concern. A realistic misalignment model based on Monte Carlo neutron ray tracing simulation was developed to evaluate the impacts of both the random misalignment and floor settlement on the performance of a toy model of 150 m straight guide system, and MENUS, an STS instrument concept with a typical guide design of two opposing Montel mirrors. The study shows that longer instruments, and instruments with complex curved mirrors/guides are sensitive to significant performance penalties due to misalignments.

引用

页数：8