Centre for molecular and materials science at TRIUMF

TRIUMF 分子与材料科学中心

• 批准号: 288274-2009
• 负责人: Percival, Paul
• 金额: $ 32.26万
• 依托单位: TRIUMF
• 依托单位国家: 加拿大
• 项目类别: Major Resources Support Program - Infrastructure
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=548165
• 关键词: Centre; molecular; materials; science; TRIUMF

The Centre for Molecular and Materials Science (CMMS) at TRIUMF is a facility that serves a broad community of scientists who make use of the TRIUMF beams of muons and radioactive nuclides to investigate diverse areas of chemistry, physics and materials science. Specifically, CMMS provides equipment and support personnel to enable visiting researchers to make use of muon spin spectroscopy (muSR) or beta-detected nuclear magnetic resonance (beta-NMR and beta-NQR). The beams provided by TRIUMF make CMMS unique in Canada. Indeed, there is no other high intensity muon source in the Americas, and only three others in the world (Japan, Switzerland and the U.K.). The muon and beta-emitting nuclides act as microscopic probes of internal magnetic fields in materials. Thus, muSR and beta-NMR are both used to study novel superconductors and magnetic materials. Beta-NMR is particular useful for the study of thin films. In other systems a muon can bind to an electron to form a muonium atom, which is, chemically, an isotope of hydrogen; applications include the study of hydrogen atom kinetics, organic free radicals and hydrogen-doped semiconductors. Since CMMS provides facilities at several beam lines, and Users typically visit TRIUMF for one or two weeks at a time, two or three times a year, there is frequent turnover of equipment and research personnel at the target stations. It is therefore necessary for the spectrometers and allied equipment to be held in common and managed by a core of permanent staff, who train and assist Users, ensure safe and efficient operation, and provide the continuity necessary for maintenance and development. The essential equipment and personnel comprise the core of the Centre for Molecular and Materials Science at TRIUMF. An increase in support personnel is needed to cope with the recent expansion of the beta-NMR facilities and the current installation of a new muon beam line. In addition, a CFI-funded project will bring further muon facilities within three years.

位于TRIUMF的分子和材料科学中心(CMMS)是一个为广大科学家服务的设施，他们利用TRIUMF的介子和放射性核素束流来研究化学、物理和材料科学的不同领域。具体地说，CMMS提供设备和支持人员，使来访的研究人员能够利用Muon自旋光谱(MuSR)或贝塔探测的核磁共振(贝塔-核磁共振和贝塔-NQR)。TRIUMF提供的波束使坐标测量机在加拿大独一无二。事实上，美洲没有其他高强度的Muon源，世界上只有三个高强度Muon源(日本、瑞士和英国)。Muon和β发射的核素充当了材料内部磁场的微观探测器。因此，MuSR和β-核磁共振都被用来研究新型超导体和磁性材料。β-核磁共振对于薄膜的研究特别有用。在其他系统中，Muon可以与电子结合形成Muonium原子，从化学上讲，Muonium原子是氢的同位素；其应用包括氢原子动力学、有机自由基和掺氢半导体的研究。由于CMMS在几条光束线上提供设施，用户通常一次访问TRIUMF一次一到两周，一年两到三次，因此目标站的设备和研究人员经常更替。因此，光谱仪和相关设备有必要共用，并由一批长期工作人员共同管理，这些工作人员对用户进行培训和协助，确保安全和有效的操作，并为维护和开发提供必要的连续性。必要的设备和人员构成了TRIUMF分子和材料科学中心的核心。需要增加支助人员，以应对最近对贝塔核磁共振设施的扩建和目前安装的一条新的介子束线。此外，CFI资助的一个项目将在三年内带来更多的Muon设施。