File:Heike Kamerlingh Onnes - 48 - Schematic representation of the lower part of the cryostat with which Kamerlingh Onnes brought the colder record to 083 Kelvin in 1921.png
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Heike_Kamerlingh_Onnes_-_48_-_Schematic_representation_of_the_lower_part_of_the_cryostat_with_which_Kamerlingh_Onnes_brought_the_colder_record_to_083_Kelvin_in_1921.png (400 × 582 pixels, file size: 94 KB, MIME type: image/png)
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| Photographer |
Unknown author |
| Description |
Nederlands: Schematische weergave van het onderste gedeelte van de cryostaat waarmee Kamerlingh Onnes in 1921 het kouderecord op 0.83 Kelvin bracht. In het buitenste dewarvat zit vloeibare lucht, in het middelste vloeibare waterstof en in het binnenste vloeibaar helium met daarin de glazen constructie binnen welke via afpompen tot zeer lage druk het kouderecord gevestigd werd. Om het warmtelek zoveel mogelijk te beperken diende een omgekeerd dubbelwandig glazen kapje, gevuld met helium - een kunststukje van glasblazer Kesselring. Het helium in de binnenste dubbelwandige beker en dat daar direct buiten ‘communiceerden’ razendsnel met elkaar via een (naar later bleek) tegen de wand opkruipende film, met als gevolg dat beide vloeistofniveaus steeds even hoog kwamen te staan. (Bijschrift uit de bron.) Natuurkundig Laboratorium, Steenschuur, Leiden. English: Schematic representation of the lower part of the cryostat with which Kamerlingh Onnes brought the colder record to 0.83 Kelvin in 1921. The outer dewar vessel contains liquid air, the middle liquid hydrogen and the inner liquid helium containing the glass structure inside which the colder record was established via pumping to very low pressure. In order to limit the heat leak as much as possible, an inverted double-walled glass cap, filled with helium, served as a piece of art by glassblower Kesselring. The helium in the inner double-walled cup and that directly outside it "communicated" with each other at lightning speed via a film (which turned out to be) that crept against the wall, with the result that both liquid levels were always at the same level. (Caption from the source.) Physics laboratory (Natuurkundig Laboratorium), Steenschuur, Leiden. |
| Depicted place | Natuurkundig Laboratorium, Steenschuur, Leiden |
| Accession number |
p 510 |
| Notes |
Nederlands: Bron van de illustratie volgens het boek: Communications from the Physical Laboratory of the University of Leiden by Prof. Dr. H. Kamerlingh Onnes English: Source of the illustration according to the book: Communications from the Physical Laboratory of the University of Leiden by Prof. Dr. H. Kamerlingh Onnes |
| Source |
Dirk van Delft, Heike Kamerlingh Onnes. Een biografie. De man van het absolute nulpunt. Bert Bakker, Amsterdam 2005, Nederlands: geraadpleegd via English: Consulted at URL https://www.dbnl.org/tekst/delf006heik01_01/delf006heik01_01_0042.php |
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929. |
| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
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| current | 22:20, 22 January 2020 | | 400 × 582 (94 KB) | Hansmuller (talk | contribs) | pattypan 19.06 |
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