Cryogenics
Development & applicationsWhat is cryogenics: cryogenics is the study of low temperatures or production of the same.Liquified gases, like liquid hydrogen and liquid helium are often used for production of very low temperature.Leiden, Netherlands is sometimes called "The Coldest Place on Earth", because of the revolutions in cryogenics that happened there. Some of these were the discovery of superconductivity by Heike Kamerlingh Onnes, the liquefaction of helium by Kamerlingh Onnes, and the solidification of helium by Kamerlingh Onnes' pupil, Willem Hendrik Keesom.The Myth: have you seen, the Stanley Kubrick/Arthur C. Clarke movie, "2001: A Space Odyssey"? In the movie, theCharacters are frozen and attempt is made to bring themback to life There is a field devoted to freezing people, called cryonics It's currently used for freezing people who die of diseases that, they hope, will be curable by the time scientists learn how to revive people. At present, though, reviving people has been successful only in sciencefiction. And not even all the time there, if you remember what Both cryogenics and cryonics got their origin from Greek word "kryo" meaning "to co
Beside this the liquidified gases are used as propulsion fuel in space explorations. Cooling electronics reduces the noise in the circuits and thus allows them to study weaker signals. When he cooled it to the temperature of liquid helium, 4 degrees Kelvin (-452F, -269C), its resistance suddenly disappeared. Not only have the limits of superconductivity not yet been reached, but the theories that explain superconductor behavior seem to be constantly under review. Thus, it was necessary for Onnes to come within 4 degrees of the coldest temperature that is theoretically attainable to witness the phenomenon of superconductivity. CONCLUSION: From the above discussion we can see that benefits of cryogenics are used in several fields. They are:MATERIAL SCIENCESUPERCONDUCTIVITYSPACE RESARCH MATERIAL SCIENCE: Racing cars that move faster, golf heads that last longer, drill machine heads having longer life cycle, are some of the achievements of cryogenics in the field of material science. But it will be naive to confuse between cryogenics and cryonics, because unlike cryonics, cryogenics is a well established science with several scientific and practical applications. · Electronics: all sensors require electronics. This gives material with superior properties. Other areas of space research were cryogenics find applications are:· Infrared Sensors: infrared rays, also called "heat rays" are given off by all warm objects. By application of cryogenics, the entire austenite present in steel can be converted into martensite. The Kelvin scale represents an "absolute" scale of temperature. When it is cooled (by means of water quenching), the structure changes to martensite. Although, it serves us in many ways, there are many more applications were cryogenic techniques can be used .
Common topics in this essay:
SCIENCE Racing,
Space Odyssey,
X-Ray Spectrometer,
Leiden University,
Infrared Sensors,
SUPERCONDUCTIVITY Superconductors,
SPACERESEARCH Space,
Infrared Astronomy,
,
Nobel Prize,
material science,
kamerlingh onnes,
heike kamerlingh onnes,
discovery superconductivity,
freezing people,
material properties,
infrared telescopes,
helium kamerlingh,
cryogenics cryonics,
objects infrared telescopes,
heat treatment,
4 degrees,
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Acceptance Essays
