Centre for molecular and materials science at TRIUMF

TRIUMF 分子与材料科学中心

• 批准号: 288274-2006
• 负责人: Percival, Paul
• 金额: $ 23.71万
• 依托单位: TRIUMF
• 依托单位国家: 加拿大
• 项目类别: Major Facilities Access Grants
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=366075
• 关键词: Centre; molecular; materials; science; TRIUMF

This proposal requests continued support for the Centre for Molecular and Materials Science at TRIUMF (CMMS). CMMS provides equipment and support personnel to enable external researchers to make use of the TRIUMF beams of muons and radioactive nuclides to investigate problems in chemistry, physics and materials science. It is the only facility of its kind in the Americas, and one of only two comparable facilities in the world. Funded by NSERC since 1988, it serves users with a wide range of interests in chemistry, physics and materials science. Solid-state physicists use muons to probe the microscopic properties of technologically important materials, such as superconductors and novel magnets. Chemists are interested in the muon as the nucleus of muonium (Mu), a light isotope of hydrogen and a spin label for free radicals. Mu studies also provide a means for investigating the behaviour of hydrogen in solids, e.g. as a trace impurity that dramatically modifies the electronic and optical properties of semiconductors. The recently developed beta-NMR facility at ISAC uses short-lived radioactive ions in a manner similar to muons to probe local properties of solids. These probes are implanted at low energies, and hence can stop in materials with tens of nanometer thickness.       The TRIUMF Five Year Plan 2005-2010 includes $2.75 million in capital + associated personnel costs for the construction of a new beam line for CMMS use. Additional support staff are needed to manage the increased infrastructure and to support the new user groups associated with recent faculty appointments at Canadian universities (10 in the past five years). It is also the aim of CMMS to provide services to a broader base of users, who need to use the facility but who should not be expected to become experts in muon and radioactive beam techniques. Since individual research groups typically take beam time for 1-6 weeks per year, it is essential for necessary spectrometers to be held in common and managed by a core of permanent staff.  That is the role of the Centre for Molecular and Materials Science at TRIUMF.

该提案要求继续支持TRIUMF分子和材料科学中心（CMMS）。CMMS提供设备和支持人员，使外部研究人员能够利用TRIUMF的μ子和放射性核素束来研究化学，物理和材料科学中的问题。它是美洲唯一的同类设施，也是世界上仅有的两个类似设施之一。自1988年以来一直由NSERC资助，为化学、物理和材料科学领域的广泛兴趣的用户提供服务。固态物理学家使用μ子来探测技术上重要材料的微观特性，如超导体和新型磁体。化学家们对μ介子感兴趣，μ介子是μ 鎓（μ）的原子核，μ 鎓是氢的轻同位素，也是自由基的自旋标记。Mu的研究还提供了一种研究氢在固体中行为的方法，例如，作为一种微量杂质，可以显着改变半导体的电子和光学特性。ISAC最近开发的β-NMR设施以类似于μ子的方式使用短寿命放射性离子来探测固体的局部性质。这些探针以低能量注入，因此可以在数十纳米厚度的材料中停止。 TRIUMF 2005-2010年五年计划包括275万美元的资本+相关人员费用，用于建造CMMS使用的新光束线。需要增加支助人员，以管理增加的基础设施，并支助与加拿大各大学最近的教员任命有关的新用户群体（过去五年中有10个）。CMMS的另一个目的是向更广泛的用户群提供服务，这些用户需要使用该设施，但不应期望他们成为μ子和放射性束技术方面的专家。由于各个研究小组通常每年需要1-6周的束流时间，因此必要的光谱仪必须共用并由核心永久工作人员管理。这就是TRIUMF分子与材料科学中心的职责。