Provision of Open-Access Positron Beam Spectroscopy to Canadian Universities (OPEN-POS)

向加拿大大学提供开放式正电子束光谱 (OPEN-POS)

• 批准号: RTI-2020-00461
• 负责人: Knights, Andrew
• 金额: $ 8.38万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=693008
• 关键词: Provision; Open; Access; Positron; Beam

This proposal requests funds to purchase a radioactive source to supply a high rate of positrons for a slow positron facility, used for acquisition of unique information on advanced materials. As a direct result we will provide open access to the slow positron beam housed at McMaster University: so-called OPEN-POS. Slow positron annihilation spectroscopy (PAS) has for many years provided unique and non-destructive characterization of materials and devices related to the nano-structure of interfaces, point defects and voids. PAS requires the delivery of a high flux of positrons to the material or system under study, and McMaster University houses one of only eight slow positron beams in the world devoted to Materials Science. We will expand the direct use of the positron facility to any Canadian academic (remote user) irrespective of their location, providing an increase in diversity of users (across gender, ethnicity, career-point, and geographical location). In this case we define “remote user” as an individual or group who have complete control of the PAS infrastructure and experiments performed thereon, but are not present at the infrastructure's immediate location. We describe an array of projects from users familiar with PAS, to those new to PAS and including those who are remote to the location of the slow positron beam. The projects include characterization of photonic films, semiconductor materials, 2-D films and photovoltaic devices. Immediate benefits of this work will be improvements in the performance and lowering of the cost of production of integrated optical circuits (used for powering the information superhighway); nanoelectronic circuits and sensors (used in the internet of things); and solar cells (critical in the fight against climate change). The specific request of this proposal is funds for the purchase of a high-flux 22Na positron source. The higher the flux, the greater the number of experiments and users that can be serviced. We have thus requested the highest flux source available. In the exploratory roll-out to be enabled by this proposal we will establish access for four remote users two are early-career researchers at McMaster with no PAS experience; one is experienced with PAS and located at another university in Ontario; one is not experienced with PAS and is located in a different province. Following successful preliminary roll-out, which we anticipate will take one year, our plan is to provide open access to OPEN-POS across Canada to all interested users. We will expand these ideas to accelerate the development of our OPEN-LAB model which will provide access to more infrastructure located at McMaster's central facilities.

该提案要求提供资金，用于购买放射源，为慢正电子设施提供高速率的正电子，用于获取先进材料的独特信息。作为一个直接的结果，我们将提供开放访问慢正电子束安置在麦克马斯特大学：所谓的开放POS。多年来，慢正电子湮没谱（PAS）为与界面、点缺陷和空隙的纳米结构相关的材料和器件提供了独特的非破坏性表征。PAS需要将高通量的正电子输送到所研究的材料或系统中，麦克马斯特大学拥有世界上仅有的八个专门用于材料科学的慢正电子束之一。我们将扩大正电子设施的直接使用，任何加拿大学术（远程用户），无论他们的位置，提供用户的多样性（跨性别，种族，职业点，和地理位置）的增加。在这种情况下，我们将“远程用户”定义为完全控制PAS基础设施和在其上执行的实验，但不存在于基础设施的直接位置的个人或团体。 我们描述了一系列的项目，从熟悉PAS的用户，到PAS的新用户，包括那些远离慢正电子束位置的用户。这些项目包括光子薄膜、半导体材料、二维薄膜和光伏器件的表征。这项工作的直接好处将是提高集成光学电路（用于为信息高速公路提供动力）的性能和降低生产成本;纳米电子电路和传感器（用于物联网）;以及太阳能电池（在应对气候变化方面至关重要）。该提案的具体要求是购买高通量22 Na正电子源的资金。流量越高，可以服务的实验和用户的数量就越多。因此，我们要求最高通量源可用。在本提案启用的探索性推广中，我们将为四个远程用户建立访问权限，其中两个是McMaster的早期职业研究人员，没有PAS经验;一个有PAS经验，位于安大略的另一所大学;一个没有PAS经验，位于不同的省。在成功的初步推出后，我们预计将需要一年的时间，我们的计划是在加拿大向所有感兴趣的用户提供对OPEN-POS的开放访问。我们将扩展这些想法，以加快我们的OPEN-LAB模型的发展，这将提供更多的基础设施位于麦克马斯特的中央设施。