Helium cryopump for electron optical devices design and preliminary cryogenic testing.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F00%3A12000043" target="_blank" >RIV/68081731:_____/00:12000043 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Helium cryopump for electron optical devices design and preliminary cryogenic testing.
Original language description
A helium cryopump for electron optical devices was designed and preliminary cryogenic parameters of the first pump sample were tested. Low LHe consumption should enable economical operation of the pump without recycling the evaporated He. The pumping cryopanel is cooled by normal LHe down to 4.2 K. A LN2 bath is utilized for the LHe bath thermal shielding. Two additional heat radiation shields cooled by the vapours of the consumed cryoliquids are installed to decrease the LHe and LN2 losses. Three chevron screens placed between the input office and the cryopanel are used to protect the internal parts against direct heat radiation from the parts at ambient temperature. The chevron systems were replaced by low emissivity screens in the preliniary tests.Predicted low evaporation rates of LHe and LN2 were achieved.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
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)
Others
Publication year
2000
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the 6th Cryogenics 2000 IIR International Conference - Refrigeration Science and Technology.
ISBN
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ISSN
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e-ISSN
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Number of pages
4
Pages from-to
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Publisher name
Czech Committee for co-operation with IIR
Place of publication
Praha
Event location
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Event date
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Type of event by nationality
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UT code for WoS article
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