Bragg Detector for Identification of Rare and Exotic Accelerated Ions in Experiments at TRIUMF-ISAC

TRIUMF同位素分离器和加速器第二阶段（ISAC-II）即将提供前所未有的强度最奇特的核，这些核在自然界中只存在几十毫秒，在最激烈的恒星事件中，一套世界上最先进的仪器，用于研究稀有核的物理学。 制备和传输技术导致包含一个以上种类的束，即具有感兴趣的外来核和具有相同质荷比的离子的“鸡尾酒”。 为了使ISAC-II实验最有效，需要有一种手段来确定“鸡尾酒”的各种成分。 我们提出了一种紧凑和相对简单的设备称为布拉格探测器。 该装置通过测量光束如何在气体体积中损失能量来识别鸡尾酒光束的成分。 它将使用数字信号波形读数来处理能量损失曲线。 我们的设备将基于一个已经由一名团队成员在欧洲成功建造和运行的设备的设计。

The TRIUMF Isotope Separator and Accelerator phase 2 (ISAC-II) is on the verge of delivering unprecedented intensities of the most exotic nuclei, those that exist in nature only for tens of milliseconds in the most violent stellar events, to a suite of some of the world's most sophisticated instruments for studying the physics of rare nuclei. The preparation and delivery techniques result in beams containing more than one species, that is, "cocktails" with both the exotic nucleus of interest, and ions with the same mass-to-charge ratio. For ISAC-II experiments to be most effective, a means of identifying the various components of the "cocktail" is needed. We propose a compact and relatively simple device called a Bragg detector. This device identifies the components of a cocktail beam by measuring how the beam loses energy in a gas volume. It will use digital signal waveform readouts to process the energy loss profile. Our device will be based on the design of one that was already built and operated successfully by one of the team members for experiments in Europe.