Thermionic Sources For Electron Cooling At IOTA

Experimental demonstration of OSC at IOTA: IOTA Run #3 Report

Optical Stochastic Cooling (OSC) is an optical-bandwidth extension of Stochastic Cooling that could advance the state-of-the-art cooling rate in beam cooling by three to four orders of magnitude [1-3]. The concept of OSC was first suggested in the early 1990s by Zolotorev, Zholents and Mikhailichenko, and replaced the microwave hardware of SC with optical analogs, such as wigglers and optical amplifiers. A number of variations on the original OSC concept have been proposed, and while a variety of proof-of-principle demonstrations and operational uses have been considered, the concept was not e…

Optical Stochastic Cooling Experiment At The Fermilab IOTA Ring

Beam cooling enables an increase of peak and average luminosities and significantly expands the discovery potential of colliders; therefore, it is an indispensable component of any modern design. Optical Stochastic Cooling (OSC) is a high-bandwidth, beam-cooling technique that will advance the present state-of-the-art, stochastic cooling rate by more than three orders of magnitude. It is an enabling technology for next-generation, discovery-science machines at the energy and intensity frontiers including hadron and electron-ion colliders. This paper presents the status of our experimental effo…

IOTA上的电子冷却与强空间电荷实验

Experiments On Electron Cooling and Intense Space-charge at IOTA

本文介绍了费米实验室IOTA利用2.5 MeV质子束研究强空间电荷下束流动力学，探讨电子冷却、空间电荷与相干不稳定性的相互作用，并描述了机器设置、具体实验及数值模拟结果。

芝加哥大学低能电子枪测试台的调试

Commissioning of the Low Energy Electron Gun Test Stand at the University of Chicago

本文介绍芝加哥大学为费米实验室IOTA电子透镜项目搭建的低能电子枪测试台，用于验证热阴极电子源及空心束源特性，并报告调试结果。

IOTA (Integrable Optics Test Accelerator): Facility and Experimental Beam Physics Program

The Integrable Optics Test Accelerator (IOTA) is a storage ring for advanced beam physics research currently being built and commissioned at Fermilab. It will operate with protons and electrons using injectors with momenta of 70 and 150 MeV/c, respectively. The research program includes the study of nonlinear focusing integrable optical beam lattices based on special magnets and electron lenses, beam dynamics of space-charge effects and their compensation, optical stochastic cooling, and several other experiments. In this article, we present the design and main parameters of the facility, outl…

费米实验室可积光学测试加速器（IOTA）中质子动力学情景

Proton Dynamics Scenarios in the Integrable Optics Test Accelerator (IOTA) at Fermilab

本文研究IOTA中2.5 MeV质子束在两种裸露晶格配置下的参数和动态，探讨非线性可积光学和电子冷却的应用，分析束流强度对横向发散率增长的影响。

Electron lenses and cooling for the Fermilab Integrable Optics Test Accelerator

Recently, the study of integrable Hamiltonian systems has led to nonlinear accelerator lattices with one or two transverse invariants and wide stable tune spreads. These lattices may drastically improve the performance of high-intensity machines, providing Landau damping to protect the beam from instabilities, while preserving dynamic aperture. The Integrable Optics Test Accelerator (IOTA) is being built at Fermilab to study these concepts with 150-MeV pencil electron beams (single-particle dynamics) and 2.5-MeV protons (dynamics with self fields). One way to obtain a nonlinear integrable latt…

Compact ultracold electron source based on a grating magneto optical trap

The ultrafast and ultracold electron source, based on near-threshold photoionisation of a laser-cooled and trapped atomic gas, offers a unique combination of low transverse beam emittance and high bunch charge. Its use is however still limited because of the required cold-atom laser-cooling techniques. Here we present a compact ultracold electron source based on a grating magneto-optical trap (GMOT), which only requires one trapping laser beam that passes through a transparent accelerator module. This makes the technique more widely accessible and increases its applicability. We show the GMOT …