Quantum Gas jet Scanner (QuantumJET)

该申请寻求STFC的资助，以支持基于量子气体射流的光束扫描仪/靶的开发。QuantumJET将产生微米聚焦的原子和分子光束，用于非侵入性、高分辨率光束监测应用，以及用作存储环中的目标。作为一种束流监测器，这种新型装置基本上适用于任何高强度、高能加速器，包括散裂中子源（SNS）或加速器驱动系统（ADS）等大功率加速器，而通常使用的束流监测器不再适用。对于依赖于非常小的横截面的加速器来说，它也将标志着一个突破，这种小横截面无法用窗帘状的气体射流来解决，比如线性对撞机。更广泛地说，这项技术将对任何加速器或光源都非常有吸引力，这些加速器或光源将受益于非破坏性的在线光束监测，包括医疗加速器和离子植入器。作为一种多用途的气体靶，定义明确的射流为研究束线和储气环的总微分截面和全微分截面提供了理想的基础。特别令人感兴趣的是低能反质子环的集成，如欧洲核子研究中心的AD和ELENA，因为keV反质子可以深入了解阿秒时间尺度上的相关过程，从而为详细理解基本物理概念铺平道路。此外，控制良好的高密度气体束也可以用作电子加速器的受限等离子体源，等离子体束转储或用于极刚性电子束的“折射”kickers。基础研发工作是在QUASAR小组进行的，该小组位于代尔斯伯里实验室的科克罗夫特研究所（CI）。本集团与全球加速器界有着密切的联系，十多年来一直是公认的束流诊断研发领域的领导者。之前的工作得到了HL-LHC-UK项目的支持，由STFC和CERN资助，以及Cockcroft研究所核心基金ST/G008248/1。它是与STFC CERN商业孵化中心校友D-Beam Ltd密切合作完成的。

This application seeks funding from STFC to support the development of a quantum gas jet-based beam scanner/target. QuantumJET will produce micrometer-focused beams of atoms and molecules for non-invasive, high resolution beam monitoring applications, as well for use as targets in storage rings. As a beam monitor, this novel device will benefit essentially any high intensity, high energy accelerator where commonly used beam monitors no longer work, including high power accelerators such as the Spallation Neutron Source (SNS) or Accelerator Driven Systems (ADS) . It will also mark a breakthrough for accelerators that rely on very small cross sections that cannot be resolved with curtain-shaped gas jets, such as linear colliders. More widely, the technology will be very attractive for any accelerator or light source that would benefit from non-destructive online beam monitoring, including medical accelerators and ion implanters. As a versatile gas target, a well-defined jet provides an ideal basis for studies into total and fully differential cross sections in beam lines and storage rings. Of particular interest is the integration in low energy antiproton rings such as the AD and ELENA at CERN, as keV antiprotons give insight into correlation process on the attosecond timescale, thus paving the way for a detailed understanding of fundamental physics concepts. Moreover, well-controlled, high-density gas beams may also find use as confined plasma sources for electron accelerators , plasma beam dumps or "refractive" kickers for extremely rigid electron beams .Underpinning R&D was carried out in the QUASAR Group, based at the Cockcroft Institute (CI) on the campus of Daresbury Laboratory. The Group is very well connected with the global accelerator community and has been a recognized leader in beam diagnostic R&D for more than a decade. Previous work was supported by the HL-LHC-UK project, funded by STFC and CERN, and the Cockcroft Institute core grant ST/G008248/1. It was done in close collaboration with D-Beam Ltd, an STFC CERN Business Incubation Centre alumnus.