Small helium bath cryopump for electron optical devices.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F02%3A12020018" target="_blank" >RIV/68081731:_____/02:12020018 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Small helium bath cryopump for electron optical devices.

Original language description

A small helium bath cryopump for electron optical devices has been designed and manufactured. The filling volumes of LHe and LN2 are 2.5 and 3.6 l,respectively. Special electron beam welding methods were utilised for the pump structure. The heat loads ofthe cryogens were minimised using numerical methods. An LHe refill interval of 30 days was reached, whereas thatof LN2 is 6 days. Good agreement between the calculated and measured values has been found. An ultimate pressure of 3x10.sup.7./sup. Pa and apumping speed better than that of a comparable ion pump were reached during a preliminary testing of pumping properties.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BJ - Thermodynamics

OECD FORD branch

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Project

<a href="/en/project/GA101%2F00%2F0028" target="_blank" >GA101/00/0028: Helium cryopump for electronoptical devices</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2002

Confidentiality

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

Name of the periodical

Cryogenics

ISSN

0011-2275

e-ISSN

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Volume of the periodical

42

Issue of the periodical within the volume

N/A

Country of publishing house

GB - UNITED KINGDOM

Number of pages

6

Pages from-to

39-44

UT code for WoS article

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EID of the result in the Scopus database

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