Muon Cooling R&D for a Neutrino Factory and Muon Collider

密西西比大学的研究小组是一个国际合作项目的一部分，该项目正在开发Muon电离冷却技术--这是建造Muon对撞机或中微子工厂的关键一步。该奖项旨在为从事这项研究工作的唯一博士后提供支持，以开发、测试和确认这项技术。该奖项的智力价值在于开发了一项关键技术--Muon电离冷却，用于创建中微子束来探索中微子振荡，以及一台用于探索1.5TeV或更高能量前沿的Muon对撞机。近期的目标是调查MuCool测试区Fermilab的201 MHz射频(RF)腔在强磁场中的运行情况。现在那里有射频功率和液氦，400 MeV的质子束即将到来。其目的是学习如何在磁场中运行一个大的射频腔，同时避免电击穿。这种频率的空腔足够大，可以通过介子衰变接受来自初级质子目标的很大一部分介子。射频腔必须能够在磁场中运行，这对中微子工厂和Muon对撞机都是关键。该小组还将用反向回旋加速器模拟Muon冷却，并为英国卢瑟福实验室的Muon电离冷却实验(MICE)委托两个高密度气凝胶(n=1.07和1.12)切伦科夫pi/？辨别探测器。这一奖项的更广泛影响如下。密西西比州的学生和QuarkNet教师将参与其中，并将使用声学传感器来定位和表征射频腔中的火花(电击穿)。Muon冷却的发展可能会导致建立中微子工厂，发现轻子区的CP破坏，并解释宇宙中重子-反重子的不对称。来自中微子工厂的中微子束可能对准位于霍姆斯塔克的美国国家科学基金会S深层地下科学与工程实验室(杜塞尔)的探测器。这将为美国提供一个一流的物理项目，不仅是为了理解宇宙，也是为了培训学生。

The University of Mississippi group is part of an international collaboration developing the techniques for muon ionization cooling?a critical step toward the construction of a muon collider or neutrino factory. This award is to provide support for the only postdoc to be engaged in this research effort towards the development, testing and confirmation of the techniques.The intellectual merit of this award is the development of a key technology, muon ionization cooling, for creating neutrino beams to explore neutrino oscillations and a muon collider to explore the energy frontier at 1.5 TeV or higher. The immediate goal is to investigate the operation of a 201 MHz radio frequency (RF) cavity in a high magnetic field at Fermilab in the MuCool Test Area. RF power and liquid helium are available there now and a 400 MeV proton beam is coming. The intent is to learn how to run a large RF cavity in a magnetic field while avoiding electrical breakdown. A cavity of this frequency is big enough to accept a large fraction of the muons coming from a primary proton target via pion decay. The RF cavities must be able to operate in magnetic fields, which is key both for neutrino factories and muon colliders. The group will also simulate muon cooling with an inverse cyclotron and to commission two high density aerogel (n=1.07 and 1.12) Cherenkov pi/ì discrimination detectors for the Muon Ionization Cooling Experiment (MICE) at the Rutherford Lab in the United Kingdom. The broader impacts of this award are as follows. Mississippi students and QuarkNet teachers will be involved and will use acoustic sensors to locate and characterize sparking (electrical breakdown) in the RF cavity. Development of muon cooling could lead to building a neutrino factory, discovering CP violation in the lepton sector, and explaining the baryon-antibaryon asymmetry in the universe. A neutrino beam from a Neutrino Factory might be aimed at a detector in the NSF?s Deep Underground Science and Engineering Laboratory (DUSEL) at Homestake. This would give the United States a first rate physics project not only for understanding the universe, but also for training students.