YAG laser for laser flash phtolysis facility

许多反应发生得太快，肉眼无法看到。 化学反应发生的时间比人类眨眼的速度快十亿倍。 了解这些反应是如何发生的提供了重要的信息，以便能够操纵它们对我们有利。 激光闪光光解（LFP）是一种研究这些快速反应的技术。 反应是由激光开始的，激光是一种非常强的单色光源，它在短脉冲（10 ns，十亿分之一秒）内发出光。 测量由于反应物消失或产物形成而引起的颜色变化遵循激光脉冲后发生的化学反应。 该提案要求提供资金，用于更换维多利亚大学LFP设施中使用的YAG激光器。 该激光器已有14年历史，最近两次失败，第一次停机时间为4周，第二次停机时间为2周。目前，它只是在边缘工作。激光器没有由其制造商维护，因为它已经过时，并且由于这个原因，它已经达到了其寿命的终点。继续获得LFP实验对于Bohne（超分子动力学）和Wan（机械有机光化学）小组所做的工作至关重要，因为他们所有的工作都依赖于LFP实验。 访问也是至关重要的弗兰克（光磁性）和米切尔（光致变色材料）组，因为LFP实验是必不可少的，以提供在这些组中研究的材料的光致变色性能的机理见解。

Many reactions occur too fast to be seen by the naked eye.  Chemical reactions can occur in times that are a billion times faster than the blinking of the human eye.  Understanding how these reactions happen provides essential information to be able to manipulate them to our advantage.  Laser flash photolysis (LFP) is a technique employed to study these fast reactions.  The reaction is started with a laser, which is a very intense light source of one color that delivers the light in a short pulse (10 ns, ten one billionth of a second).  Measuring the color change due to reactant disappearance or product formation follows the chemical reactions that occur after the laser pulse.  This proposal is requesting funds for the replacement for the YAG laser used in the LFP facility at the University of Victoria.  This laser is 14 years old and recently failed twice with a down time of 4 weeks on the first occasion and 2 weeks on the second occasion. It is currently only working marginally. The laser is not maintained by its manufacturer because it is obsolete and for this reason it has reached the end of its lifetime. Continued access to LFP experiments is essential for the work done in the Bohne (supramolecular dynamics) and Wan (mechanistic organic photochemistry) groups, since all of their work relies on LFP experiments.  Access is also critical for the Frank (photomagnetism) and Mitchell (photochromic materials) groups, since LFP experiments are essential to provide mechanistic insights into the photochromic properties of the materials studied in these groups.