Graduate student support for accelerator physics projects on ARIEL

2010年6月，加拿大创新基金会（CFI）批准了对超导电子直线加速器（e-linac）的资金资助，作为先进稀有同位素实验室（ARIEL）的第一阶段。该加速器于2014年9月成功投入使用。CFI已经批准了第二阶段（ARIEL-II）的资金，各省对匹配资金的批准也即将完成。ARIEL II包括两个新目标站的基础设施和用于电子诱导光裂变以及质子诱导裂变、散裂和碎裂反应产生的同位素的离子束输送系统。然后将这些放射性同位素交付给核物理、核天体物理和材料科学研究的实验，以及医疗应用。******此申请是请求更新NSERC对我们研究生的支持，使他们能够继续参与ARIEL，从而接受加速器物理方面的宝贵培训。虽然资本成本通过批准的CFI资金支付，但CFI不支持研究生的培训。******我们的学生在许多领域为ARIEL做出了宝贵的贡献。学生们参与了视屏光束剖面监视器的设计、建造和操作，这些监视器已在e-直线加速器的调试中广泛使用。一名学生开发了一种新的光束偏转器设计，这是未来升级电子直线加速器所必需的，使用超导射频，原型将很快进行测试。其他学生正在进行模拟和测试，以最终确定目标站具有挑战性的元素的设计。这包括光转换器和离子提取光学系统，前者可以在目标前方产生光裂变所需的高能光子，后者可以加速并聚焦从目标中释放的稀有同位素离子。******几年内，e-linac将开始为科学生产同位素，大大扩展了TRIUMF的同位素研究计划。这段时间将为学生提供学习加速器物理重要技能的绝佳机会。

Capital funding for a superconducting electron linear accelerator at TRIUMF, known as the e-linac, was approved through the Canada Foundation for Innovation (CFI) in June 2010, as the first phase of the advanced rare isotope laboratory (ARIEL). The accelerator was successfully commissioned in September 2014. CFI has approved funding for the second phase (ARIEL-II) and provincial approval for matching funding is nearly finalized. ARIEL II includes infrastructure for two new target stations and ion beam delivery systems for isotopes produced by electron-induced photo-fission as well as by proton-induced fission, spallation and fragmentation reactions. These radioisotopes are then delivered to experiments for nuclear, nuclear astrophysics, and material science research, as well as for medical applications.******This application is a request to renew NSERC support for our graduate students to allow them to continue to participate in ARIEL, thereby receiving valuable training in accelerator physics. While capital costs are covered through the approved CFI funding, CFI does not support the training of graduate students.******Our students have made valuable contributions to ARIEL in many areas. Students participated in the design, construction, and operation of view screen beam profile monitors, that have been used extensively in the commissioning of the e-linac. A student has developed a novel design for a beam deflector, necessary for future upgrades of the e-linac, using superconducting RF, and a prototype will be tested soon. Other students are working on simulation and tests to finalize the design of challenging elements of the target station. This includes the photo-converter, that produces the high energy photons needed for photo-fission immediately in front of the target, and the ion extraction optics system, that accelerates and focuses the rare isotope ions released from the target.******Within a few years, the e-linac will begin producing isotopes for science, significantly expanding the isotope research program at TRIUMF. This period will offer an excellent opportunity for students to learn important skills in accelerator physics.