Mass-spectrometer leak detector for high-vacuum/high-purity research intruments

西蒙·弗雷泽大学物理系在实验凝聚态物理方面有一个充满活力的项目，研究人员致力于：新型半导体和磁性材料的生长和表征；超极化气体的磁共振；玻色-爱因斯坦凝聚体；囚禁离子量子计算；以及量子材料的物理性质。大多数研究中使用的仪器都有一个共同的要求，要么是非常高的真空，要么是处理高纯度的气体。高真空之所以重要，有几个原因：它允许一次沉积一层原子层的材料，而不会受到残余气体的污染；它允许建立和维持极端不稳定的条件，如极低的温度；它使电子显微镜等设备能够以原子分辨率研究结构。与此同时，高纯度气体的输送对于几个应用是必不可少的，包括定制半导体材料的增长(2001年在SFU使用以生产世界上最快的晶体管)，以及运行用于循环高纯度氦气体混合物的低温恒温器。除了世界级的研究努力外，我们的凝聚态物理项目对培训做出了令人印象深刻的贡献，在过去6年中总共指导了198名实习研究人员。

The Department of Physics at Simon Fraser University has a vibrant program in experimental condensed matter physics, with researchers working on: the growth and characterization of novel semiconductor and magnetic materials; magnetic resonance of hyperpolarized gases; Bose-Einstein condensates; trapped ion quantum computing; and the physical properties of quantum materials. The apparatus used in most of this research has the common requirement of either very high vacuum, or the handling of high purity gases. High vacuum is important for several reasons: it allows materials to be deposited, one atomic layer at a time, without contamination from residual gas; it allows extreme, unstable conditions, such as very low temperatures, to be set up and maintained; and it enables devices such as electron microscopes to study structure with atomic resolution. In parallel with this, the delivery of high purity gases is essential to several applications, including the growth of custom-made semiconductor materials (used at SFU to produce the world's fastest transistors in 2001) and the operation of low temperature cryostats that circulate high purity mixtures of helium gas. In addition to a world-class research effort, our condensed matter physics program makes an impressive contribution to training, having collectively supervised 198 trainee researchers in the past 6 years.