liquid helium

基本解释

Liquid helium cools infrared detectors, nuclear reactors, and the superconducting magnets used in MRI machines, too.
液氦也用来冷却红外线探测器，核反应堆，以及核磁共振成像器械的超导磁体等。
For instance, at low temperatures liquid helium’s properties change dramatically, becoming a “superfluid” that can overcome friction.
比如，在低温时，液态氦的性质产生剧烈变化，成为一种能克服摩擦“超流体”。
It turns out that particles in crystals and bubbles in liquid helium follow the same laws as some of the fundamental particles of nature.
事实证明晶体中的粒子、液氦中的气泡和自然界中一些基本粒子一样，遵循着同样的原理。

We use a liquid helium. And so in order to make a liquid helium, you can't take helium at room temperature and do this, because if you did, you would just heat it up, because the room temperature is above the inversion temperature, so Joule-Thomson would heat up the helium.
为了得到液氦,不能再常温,做这个实验,否则就是加热氦气，因为室温高于它的转变温度,所以焦耳-汤姆孙，实验会加热氦气。
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So you need first to take the liquid helium and cool it below 53 degrees Kelvin before you can do the Joule-Thomson to cool it even further to make liquid helium.
我们首先需要,把温度江都53k一下,然后利用焦耳-汤姆孙实验,来继续冷却它。
麻省理工公开课 - 热力学与动力学课程节选
You take your room temperature liquid helium and you cool it with liquid nitrogen to 77 degrees Kelvin, the new, you're not quite there yet 77k unfortunately right? Then you take hydrogen you cool it would liquid nitrogen to 77, then you can use your hydrogen gas.
首先要有常温的氦气,拿液氮把它冷却到77k，那个新来的7,你不坐在那儿，对吧？,然后用液氮把氢气降温到,然后就可以使用这个氢气了，想要用氢气来做焦耳-汤姆孙实验。
麻省理工公开课 - 热力学与动力学课程节选

However, the most interesting and novel aspect of Unpartial is the search analysis that powers the website, called Liquid Helium.
FORBES: Is This The Future Of Search?

液氦
The Neutral Beam Injection (NBI) system requires a clean high vacuum environment. The liquid helium cryocondensation pump with high pumping speed is an ideal vacuum obtain device.
中性束注入系统要求有洁净的动态高真空环境，大抽速液氦冷凝泵是满足此要求的理想真空获得设备。
物理学
液态氦
液氦
液体氦