发表机构
Department of Physics, Technical University of Denmark; Data Management & Scientific Computing, European Spallation Source ERIC; Spectroscopy Division, European Spallation Source ERIC; Jülich Centre for Neutron Science; Heinz Maier-Leibnitz Zentrum, Technical University of Munich（丹麦技术大学物理系; 欧洲散裂源ERIC数据管理与科学计算部; 欧洲散裂源ERIC光谱学部; 朱利希中子科学中心; 慕尼黑大学海因茨·迈尔-莱布尼茨中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出两种共生仪器概念（SLEIPNIR与Remora），利用ESS长脉冲束流中未开发的中子，通过双单色器垂直平移和布拉格反射提取多余谱带宽，在不干扰现有束线的情况下，以模块化、低成本方式扩展中子科学容量，性能媲美ILL参考仪器。
AI 中文摘要
欧洲散裂源（ESS）的长脉冲为在单个束端口上容纳多台中子仪器提供了独特的机会。在此，我们提出了两种共生仪器概念，旨在利用先前未开发的中子，同时不对现有或计划中的束线造成显著干扰。第一种概念采用双聚焦双单色器系统，垂直平移中子束，使得紧凑型仪器能够堆叠在空间受限、传统仪器无法进入的束端口内。第二种概念通过旗舰仪器斩波系统上游的布拉格反射，从现有导管中提取多余的谱带宽，为第二台仪器供束。两种概念均使用McStas中的梯度下降蒙特卡罗射线追踪模拟进行优化，并与其他源上现有高效仪器进行基准比较。尽管在显著的几何和通量约束下运行，所得仪器的性能可与ILL上成熟参考仪器相媲美。这两种概念共同展示了一条模块化且经济高效的途径，以利用设施中原本闲置的资源来扩展ESS的科学容量。
英文摘要
The long pulse of the European Spallation Source (ESS) offers unique opportunities to host more than one neutron instrument on a single beam-port. Here, we present two symbiotic instrument concepts designed for previously unexploited neutrons, without imposing significant perturbation on existing or planned beamlines. The first concept employs a doubly focusing dual-monochromator system to vertically translate the neutron beam, enabling compact instruments to be stacked within spatially constrained beam ports inaccessible to conventional instruments. The second extracts excess spectral bandwidth from an existing guide via Bragg reflection upstream of the flagship instrument's chopper system, feeding a second instrument. Both concepts are optimized using gradient-descent Monte Carlo ray-tracing simulations in McStas and benchmarked against existing productive instruments at other sources. Despite operating under significant geometric and flux constraints, the resulting instruments demonstrate performance comparable to well-established reference instruments at the ILL. The two concepts together illustrate a modular and cost-effective route to expanding ESS scientific capacity, using the facility's resources that would otherwise go unused.
