China's research into the world's most extreme ultraviolet light source research smog formation | source | smog | Dalian _ news
Original title: China has successfully developed the world's most extreme ultraviolet light source research on smog formation process
Beijing authorities wide nets, January 17 (Xinhua Zhang Siqing) according to the voice of the news aspect of the news in recent years, haze has been a problem in most of China. A lot of people are asking how smog forms. Now, the problem will be a major technological breakthrough by China--"Dalian light" solution.
Recently, the brightest in the world of extreme ultraviolet light source, developed in China with a total length of 100 meters – the free electron Laser facility "Dalian light" made the world's most intense extreme ultraviolet free-electron laser pulses, it is like a high-speed camera, gave the world filming "slow-motion" movies. So, how on earth did it observed the formation of smog? What will bring to our lives changed?
Ozone empty of formed involves atmosphere upper ozone molecular of quenching out mechanism, fog haze of formed involves pollutants molecular gathered process, these phenomenon essentially are is atomic and molecular process, but, to control or using these physical and chemical process, we on need in laboratory in research these process by involves of Atomic and molecular of reaction mechanism, so on need precise and high sensitivity to detection by involves Atomic and molecular. Extreme ultraviolet free-electron Laser, is the most handy weapon scientists explore the mysteries of the physical world.
Deputy Director of the Dalian Institute of chemical physics, Chinese Academy of Sciences academician officiating at the presentation, if using this light source, we can better research process, including the process of molecular aggregation and process of haze in the atmosphere is actually a process of aggregation.
In scientific research, advanced technology, in the development of national defense science and technology, have a good prospect of free electron Laser, also plays an increasingly important role in cutting-edge scientific research, especially in the last ten years, free-electron laser technology developments and breakthroughs for the exploration of the unknown world, discover new laws of science, implementation technology offers unprecedented research tools for change.
Officiating at the, for example, "for example, in the us, we do a lot of study on catalytic processes, we can use this source to explore catalytic processes, you can more clearly understand what these catalytic processes generated in the process, the process what happened. Which will help us design better catalysts of the future.
"Dalian light" is China's first large users of scientific research of free electron laser device is the world's only run in the EUV-band free electron Laser facility, is the world's most extreme ultraviolet light source. Two stunt, one is light, the second is light a short time. Officiating at the said, this is it can play role of key, "a light bright words, can let we on many material world including microcosm see have more clear, light time short can see many very fast of process, including many fly seconds skin seconds of process, like like incandescent, and flashlight, we see not to time of changes, light of brightness with time of super short, on we this device for is very of important of, on future scientific research, is very important of. ”
We often say "blink of an" If the time is defined as the blink of an eye for a second, then only 1 second 1 FS one-, only one-zero seconds and 1 picosecond. Officiating at the explained that this device made of light source is the equivalent of a fast shutter in the camera, through the continuous shooting, to render the ultrafast dynamic process of physical processes and chemical reactions. "We this world essentially is a dynamic of world, regardless of is chemical reactions or, physical process or, many are is in dynamic changes of, so we in understanding this world Shi, we cannot only see photos, we to understanding this dynamic of process, and to see have more clear, more good, need is bright of light, is short of pulse light, view these physico-chemical biological atmosphere some process. ”
On this,, Chinese Academy of Sciences Shanghai application physical Institute Director Zhao Zhentang further explained said, "image of said, it can makes we of scientists to molecular movement took movie, such scientists on can master whole material internal structure law, must can put whole process to reflect out, or slow has words only see a beginning and a end stage, you on not know Middle what occurred has what, to wants to application good words must to know middle is how changes came of. ”
It is understood that the "Dalian light" put into use, will are open to scientists around the world together to explore the mysteries of the physical world. Zhao Zhentang noted that China took the lead in the building of the advanced light source means a lot, "after learning the law for future development of science and technology offers more ways and approaches. This is an important breakthrough in science and technology foundation. Thus became an international technology competition to seize the Hill. ”
, Chinese Academy of Sciences Deputy Dean Wang Enge said, very purple outside electronic laser device is "Dalian light" of construction, is, Chinese Academy of Sciences and China of and a items has very high displayed degrees of major technology results, device in the 90% of equipment are by China Development, marks China in this a field occupy has world leading status, for China future development more new of high repeat frequency very purple outside free electronic laser lay has solid of based. "Dalian light" built out of light, become China's another successful example of big science project, will greatly promote China in the energy, chemical, physical, biological, materials, atmospheric haze, lithography and other important research in the field of promotion, to inject new vitality into China's science and technology.
Source: authorities wide nets
> Editors: Dong Zhang
Article keywords:Light haze of Dalian
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中国研成世界最亮极紫外光源 可研究雾霾形成|光源|雾霾|大连_新闻资讯
原标题：中国成功研制世界最亮极紫外光源 可研究雾霾形成过程
央广网北京1月17日消息（记者潘毅 张四清）据中国之声《新闻纵横》报道，近些年，雾霾一直是困扰中国大部分地区的难题。很多人都在追问雾霾到底是怎么形成的。如今，这个问题就可以通过中国又一重大科技突破——“大连光源”解决。
近日，世界上最亮的极紫外光源、由中国自行研制的总长100米的自由电子激光装置——“大连光源”发出了世界上最强的极紫外自由电子激光脉冲，它就像一台高速摄像机，给这大千世界拍摄“慢动作”电影。那么，它到底是怎么观测到雾霾的形成过程的呢？又会给我们的生活带来什么改变呢？
臭氧层空洞的形成涉及到大气上层臭氧分子的淬灭机制，雾霾的形成涉及到污染物分子聚集过程，这些现象本质上都是原子和分子过程，但是，要控制或利用这些物理和化学过程，我们就需要在实验室里研究这些过程所涉及到的原子和分子的反应机制，因此就需要精确并且高灵敏度地探测所涉及到原子和分子。极紫外波段自由电子激光，就是科学家探索物质世界奥秘的最得心应手的武器。
大连化学物理研究所副所长、中国科学院院士杨学明介绍，如果用这种光源，我们可以更好地来研究很多过程，包括分子聚集的过程，大气里雾霾产生的过程实际上就是一个分子聚集的过程。
在科学研究、先进技术、国防科技发展中，自由电子激光都有着重要的应用前景，在前沿科学研究中也发挥着越来越重要的作用，特别是近十年来，自由电子激光技术的发展和突破为探索未知物质世界、发现新科学规律、实现技术变革提供了前所未有的研究工具。
杨学明举例说，“比如说，在我们所里我们做很多催化的过程研究，我们可以利用这个光源来探索催化过程，可以更清楚地了解这些催化过程里产生了哪些中间过程，这个过程到底是怎么样发生的。这样有助于我们未来设计更好的催化剂。
“大连光源”是中国第一台大型自由电子激光科学研究用户装置，是当今世界上唯一运行在极紫外波段的自由电子激光装置，也是世界上最亮的极紫外光源。它身怀两大绝技，一是亮，二是发出亮光的时间短。杨学明表示，这正是它能够发挥作用的关键，“一个光源亮的话，可以让我们对很多物质世界包括微观世界看得更清楚，亮光时间短可以看很多非常快的过程，包括很多飞秒皮秒的过程，比如说像白炽灯、手电筒，我们看不到时间的变化，光的亮度跟时间的超短，对我们这个装置来说是非常之重要的，对未来科学研究来讲也是非常重要的。”
我们常说“一眨眼的功夫”，如果把眨一下眼的时间定义为一秒的话，那么1飞秒只有1秒的一千万亿分之一，而1皮秒只有一万亿分之一秒。杨学明解释说，这个装置发出的光源，就相当于照相机里一个很快的快门，通过连续的拍摄，来呈现这个超快的物理过程和化学反应的动态过程。“我们这个世界实质上是一个动态的世界，无论是化学反应也好，物理过程也好，很多都是在动态变化的，所以我们在理解这个世界时，我们不能只看照片，我们要理解这个动态的过程，而且要看得越清楚，越好，需要很亮的光源，很短的脉冲光源，来看这些物理化学生物大气一些过程。”
对此，中国科学院上海应用物理研究所所长赵振堂进一步解释说，“形象的说，它可以使我们的科学家给分子运动拍电影，这样科学家就可以掌握整个物质内部结构规律，一定能够把整个过程给反映出来，否则慢了话只能看到一开头和一个结束阶段，你就不知道中间到底发生了什么，要想应用好的话必须要知道中间是怎么变化过来的。”
据了解，“大连光源”投入使用后，将面向全世界的科学家开放，共同探索物质世界的奥秘。赵振堂指出，中国率先建成这一先进光源意义非凡，“掌握规律之后可以为今后科技的发展提供更多的方式和办法。这也就是在科技前沿取得突破的一个重要基础。因而也就成为了各国科技竞争要抢占的山头。”
中国科学院副院长王恩哥表示，极紫外电子激光装置也就是“大连光源”的建设，是中国科学院乃至中国的又一项具有极高显示度的重大科技成果，装置中90%的设备均由中国研发，标志着中国在这一领域占据了世界领先地位，为中国未来发展更新一代的高重复频率极紫外自由电子激光打下了坚实的基础。“大连光源”的建成出光，成为中国大科学工程的又一成功范例，也必将大大促进中国在能源、化学、物理、生物、材料、大气雾霾、光刻等多个重要领域研究水平的提升，为中国的科技事业注入新的活力。
来源：央广网
>责任编辑：张冬
文章关键词： 光源 雾霾 大连
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