A Consortium for the Acquisition of Equipment to Complete a Proton Detector for the DZero Experimental Particle Physics Program

这项来自北伊利诺伊大学(NIU)和德克萨斯大学阿灵顿分校(UTA)小组的提案要求提供资金，为基于加速器的高能物理实验-费米实验室的D0实验-完全配备一个新的质子子探测器。费米实验室Tevatron是世界上最高的能量对撞机，并将在本十年的大部分时间里保持在能源前沿。在此期间，D0和CDF实验将领导美国的高能前沿物理计划，最大限度地提高它们的能力是很重要的。D0实验是一项大型的国际合作，通过发现顶夸克，通过广泛的标准模型测试和新现象搜索，极大地促进了对粒子物理学的理解。Tevatron Run I的最新和最令人惊讶的结果之一是，在高横向能量喷流之间存在巨大的快度差距(没有产生粒子的区域)。为了更好地理解这一新的硬衍射领域，它探测到了强力和真空激发的其他难以触及的细节，需要新的探测器来标记和测量散射质子。第一次运行的经验导致提议在D0探测器的基线升级中增加一个新部件--正向质子探测器。FPD由动量分光计组成，利用加速器磁铁以及在散射质子轨迹上测量的点来计算其动量和散射角。部分配备的平板显示器的初步结果非常有希望，表明探测器正在按设计工作。这项提案的资金将使UTA和NIU能够购买完全装备FPD所需的光电管和电子设备，并提供一名研究生来调试和维护新的探测器。广泛影响：FPD设在Fermilab，将向来自美国和海外60多所高等学府的学生广泛开放。FPD将是UTA和NIU已经实施的强有力的外展计划的重要组成部分。研究生将在这一新探测器的安装和调试中发挥关键作用。从这次实验中获得的知识将使人们对自然界的基本力量有更深入的了解。

This proposal from the Northern Illinois University (NIU) and University of Texas at Arlington (UTA) groups, requests funds to fully equip a new proton sub-detector for an accelerator-based high-energy physics experiment, the D0 experiment at Fermilab. The Fermilab Tevatron is the world's highest energy collider, and will remain at the energy frontier for much of the decade. The D0 and CDF experiments will lead the U.S. high-energy frontier physics program during this period, and it is important to maximize their capabilities. The D0 experiment is a large international collaboration that has significantly advanced the understanding of particle physics through the discovery of the top quark and via a broad range of Standard Model tests and new phenomena searches. One of the new and most surprising results from Tevatron Run I was the existence of large rapidity gaps (regions with no produced particles) between high transverse energy jets. Improved understanding of this new field of hard diffraction, which probes otherwise inaccessible details of the strong force and vacuum excitation, requires new detectors for tagging and measuring scattered protons. The experience from Run I resulted in the proposal for a new component, the Forward Proton Detector (FPD), to be added to the baseline upgrade of the D0 detector. The FPD consists of momentum spectrometers that make use of accelerator magnets along with points measured on the track of the scattered proton to calculate its momentum and scattering angle. Preliminary results from a partially equipped FPD are very promising and show that the detector is working as designed. The funding of this proposal will allow UTA and NIU to purchase the phototubes and electronics needed to fully equip the FPD and to provide a graduate student to commission and maintain the new detectors.Broader Impact: Located at Fermilab, the FPD will be widely accessible to students from more than 60 institutions of higher learning in the U.S. and abroad. The FPD will be an important component of vigorous outreach programs already in place at UTA and NIU. Graduate students will play a critical role in the installation and commissioning of this new detector. The knowledge gained from this experiment will lead to a deeper understanding of the basic forces of nature.