Diffusion pump
Diffusion pumps use a high speed jet of vapor to direct gas molecules in the pump throat down into the bottom of the pump and out the exhaust. They were the first type of high vacuum pumps operating in the regime of free molecular flow, where the movement of the gas molecules can be better understood as diffusion than by conventional fluid dynamics. Invented in 1915 by Wolfgang Gaede, he named it a diffusion pump since his design was based on the finding that gas cannot diffuse against the vapor stream, but will be carried with it to the exhaust. However, the principle of operation might be more precisely described as gas-jet pump, since diffusion plays a role also in other high vacuum pumps. In modern textbooks, the diffusion pump is categorized as a momentum transfer pump.
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1915 in scienceCathode-ray tubeChain HomeCold trapCryopumpDPIndex of chemistry articlesInjectorIon pump (physics)Irving LangmuirMercury (element)Mercury poisoningMolecular drag pumpOil diffusion pumpPolyphenyl etherRotary compression pumpSilicone oilTimeline of low-temperature technologyTransmission electron microscopyTurbomolecular pumpVacuum ejectorVacuum pumpVacuum tubeWolfgang Gaede
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Diffusion pump
Diffusion pumps use a high speed jet of vapor to direct gas molecules in the pump throat down into the bottom of the pump and out the exhaust. They were the first type of high vacuum pumps operating in the regime of free molecular flow, where the movement of the gas molecules can be better understood as diffusion than by conventional fluid dynamics. Invented in 1915 by Wolfgang Gaede, he named it a diffusion pump since his design was based on the finding that gas cannot diffuse against the vapor stream, but will be carried with it to the exhaust. However, the principle of operation might be more precisely described as gas-jet pump, since diffusion plays a role also in other high vacuum pumps. In modern textbooks, the diffusion pump is categorized as a momentum transfer pump.
has abstract
Diffusion pumps use a high spe ...... l ethers as the working fluid.
@en
La pompa a diffusione è una po ...... a manutenzione assai limitata.
@it
Pompa dyfuzyjna - rodzaj pompy ...... o) do obszaru próżni wstępnej.
@pl
Uma bombas de difusão usa um j ...... r-se óleo de silicone em 1928.
@pt
Une pompe à diffusion est une ...... fle.
* Portail de la physique
@fr
Дифузі́йний насо́с (дифузі́йна ...... овини (ртуть, вакуумна олива).
@uk
拡散ポンプ(かくさんポンプ、英語: diffusion pu ...... 頻繁にコールドトラップへの液体窒素補充の必要があるのが難点。
@ja
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Diffusion pumps use a high spe ...... d as a momentum transfer pump.
@en
La pompa a diffusione è una po ...... no aspirate dalla pompa ausili
@it
Pompa dyfuzyjna - rodzaj pompy ...... o) do obszaru próżni wstępnej.
@pl
Uma bombas de difusão usa um j ...... livros textos modernos, a bomb
@pt
Une pompe à diffusion est une ...... ouvent à la partie inférieure
@fr
Дифузі́йний насо́с (дифузі́йна ...... овини (ртуть, вакуумна олива).
@uk
拡散ポンプ(かくさんポンプ、英語: diffusion pu ...... いように先にチャンバーを大気圧から粗引きしておく必要がある。
@ja
label
Bomba de difusão
@pt
Diffusion pump
@en
Pompa a diffusione
@it
Pompa dyfuzyjna
@pl
Pompe à diffusion
@fr
Öldiffusionspumpe
@de
Дифузійний насос
@uk
拡散ポンプ
@ja