Studies of slow-positron production using low-energy primary electron beams

E. Lessner, D. Mangra, J. Power, P. Schoessow, M. White
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引用次数: 0

Abstract

Slow-positron beams produced from negative-work-function solid-state moderators have found numerous applications in condensed matter physics. There are potential advantages in using low-energy primary electron beams for positron production, including reduced radiation damage to single-crystal moderators and reduced activation of nearby components. We present numerical calculations of positron yields and other beam parameters for various target-moderator configurations using the Argonne Wakefield Accelerator (AWA) and Advanced Photon Source (APS) electron linacs as examples of sources for the primary electron beams. The status of experiments at these facilities is reviewed.
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利用低能初级电子束产生慢正电子的研究
由负功函数固体调节剂产生的慢正电子束在凝聚态物理中有许多应用。使用低能一次电子束产生正电子有潜在的优势,包括减少对单晶减速剂的辐射损伤和减少附近组件的激活。我们使用阿贡韦克菲尔德加速器(AWA)和先进光子源(APS)电子直线机作为主电子束源的例子,对不同目标-慢化剂配置下的正电子产率和其他光束参数进行了数值计算。综述了这些设施的实验现状。
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