Malá lázňová kryovývěva plněná kalným héliem

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F04%3A00100010" target="_blank" >RIV/68081731:_____/04:00100010 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26210/04:PU50694

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Economical helium bath cryopump: design and testing

Popis výsledku v původním jazyce

A small UHV helium bath cryopump with low cryoliquid consumption has been designed, manufactured and tested. The cryopump is designed to keep UHV in electron optical devices without generation of disturbing electromagnetic fields or vibrations. The outervolume of its shell is 15l, the filling volumes of liquid helium (LHe) and liquid nitrogen (LN2) are 3.0 l and 3.4 l, respectively. Operating times between cryoliquid fillings are 35 days for LHe and 6 days for LN2. A pump speed of 25l/s was measured for the He gas. A lowest pressure of 1.5e-7 Pa was achieved in a test chamber and the pumping tests indicated that an even lower pressure would be achieved in a well-degassed chamber. Good agreement between the calculated and measured values both of the pump speed and the cryoliquid evaporation has been found. The system of chevron-type baffles was designed and checked by Monte Carlo simulations of molecular flow and radiative heat transfer

Název v anglickém jazyce

Economical helium bath cryopump: design and testing

Popis výsledku anglicky

A small UHV helium bath cryopump with low cryoliquid consumption has been designed, manufactured and tested. The cryopump is designed to keep UHV in electron optical devices without generation of disturbing electromagnetic fields or vibrations. The outervolume of its shell is 15l, the filling volumes of liquid helium (LHe) and liquid nitrogen (LN2) are 3.0 l and 3.4 l, respectively. Operating times between cryoliquid fillings are 35 days for LHe and 6 days for LN2. A pump speed of 25l/s was measured for the He gas. A lowest pressure of 1.5e-7 Pa was achieved in a test chamber and the pumping tests indicated that an even lower pressure would be achieved in a well-degassed chamber. Good agreement between the calculated and measured values both of the pump speed and the cryoliquid evaporation has been found. The system of chevron-type baffles was designed and checked by Monte Carlo simulations of molecular flow and radiative heat transfer

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

<a href="/cs/project/GA101%2F00%2F0028" target="_blank" >GA101/00/0028: Heliová kryogenní vývěva pro elektronově optické přístroje</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2004

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Vacuum

ISSN

0042-207X

e-ISSN

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Svazek periodika

74

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

77-83

Kód UT WoS článku

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EID výsledku v databázi Scopus

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