标题： 用空心电子束准直 显示英文标题

标题： Collimation with hollow electron beams

摘要： 一种用于存储环和对撞机中强高能束的受控晕区去除的新概念被提出。 它是基于循环束在环的2米长部分与5千电子伏特、磁约束的脉冲空心电子束相互作用。 电子束包围循环束，横向踢动晕区粒子，而不会干扰束流核心。 通过作为可调的扩散增强器而不是硬光阑限制，空心电子束准直器将传统准直系统扩展到由可接受损失所施加的强度极限之外。 该概念已在费米实验室的质子-反质子对撞机Tevatron上进行了实验测试。 本文介绍了对980吉电子伏特反质子准直的初步结果。 显示英文摘要

摘要： A novel concept of controlled halo removal for intense high-energy beams in storage rings and colliders is presented. It is based on the interaction of the circulating beam with a 5-keV, magnetically confined, pulsed hollow electron beam in a 2-m-long section of the ring. The electrons enclose the circulating beam, kicking halo particles transversely and leaving the beam core unperturbed. By acting as a tunable diffusion enhancer and not as a hard aperture limitation, the hollow electron beam collimator extends conventional collimation systems beyond the intensity limits imposed by tolerable losses. The concept was tested experimentally at the Fermilab Tevatron proton-antiproton collider. The first results on the collimation of 980-GeV antiprotons are presented.