Quantum Gas jet Scanner (QuantumJET)

该申请寻求STFC的资助，以支持基于量子气体喷射的光束扫描器/目标的开发。QuantumJET将产生微米级聚焦的原子和分子束，用于非侵入性、高分辨率束流监测应用，以及用作储存环中的靶。作为一个束流监测器，这种新型的设备将受益于基本上任何高强度，高能量加速器，其中常用的束流监测器不再工作，包括高功率加速器，如散斑中子源（SNS）或加速器驱动系统（ADS）。这也将标志着加速器的突破，这些加速器依赖于非常小的横截面，无法用帘状气体射流解决，例如线性对撞机。更广泛地说，该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在线束流监测，包括医疗加速器和离子加速器。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存环中的总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量反质子环的集成，如欧洲核子研究中心的AD和ELENA，因为千电子伏的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、等离子体束流收集器或用于极刚性电子束的“折射”反冲器。基础研发工作由QUASAR集团进行，该集团位于达雷斯伯里实验室校园内的Cockcroft研究所（CI）。该集团与全球加速器界有着良好的联系，十多年来一直是束流诊断研发领域公认的领导者。以前的工作得到了由STFC和CERN资助的HL-LHC-UK项目以及Cockcroft研究所核心资助ST/G 008248/1的支持。这是与STFC CERN企业孵化中心校友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.