AT74657B - Electrical discharge vessel for pure electron discharge. - Google Patents
Electrical discharge vessel for pure electron discharge.Info
- Publication number
- AT74657B AT74657B AT74657DA AT74657B AT 74657 B AT74657 B AT 74657B AT 74657D A AT74657D A AT 74657DA AT 74657 B AT74657 B AT 74657B
- Authority
- AT
- Austria
- Prior art keywords
- discharge
- pure electron
- vessel
- electrical
- thorium
- Prior art date
Links
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 4
- 229910052776 Thorium Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Microwave Tubes (AREA)
Description
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Beweis dafür, dass die hohe Elektronenaussendung einer Thoriumhaut zuzuschreiben ist, bildet die Tatsache, dass metallisches Thorium selbst bei Freiheit von oberflächlicher Oxydation eine sehr hohe Elektroenenaussendung für eine gegebene Temperatur im Vergleich mit Wolfram auf-
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infolge seines niedrigen Schmelzpunktes und seiner leichten Oxydierbarkeit.
Bei 2000 bis 2300 K diffundiert das aktive Thorium langsam aus dem Innern des Metalles nach der Oberfläche. Bei steigender Temperatur wird ein Punkt erreicht, in welchem die Ver-
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Kathode bei einer Temperatur zwischen 2000 und 22000 K lange Zeit zu betreiben, ohne ihre hohe Elektronenaussendung zu zerstören, doch ist der Betrieb bei höherer Temperatur nicht empfehlenswert. Es kann bereits in dem oben angegebenen Temperaturbereich eine grosse Elektronenaussendung unter gleichzeitiger Ersparnis an Energie für die Erhitzung der Kathode erzielt werden.
Entladungsgefä2e mit Kathoden der angegebenen Art können für die verschiedensten Zwecke benutzt werden, z. B. als Gleichrichter oder zur Verstärkung von elektrischen Schwingungen usw. Das Thorium muss in derKathodenichtvon vomeherein bei ihrer Herstellung enthalten sein, sondern es kann auch eine zunächst thoriumfreie Kathode dadurch
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hinausgpht. Diese Tatsache kann benutzt werden, um eine eine thorierte Kathode eluthaltpndL- Entladungsröhre als eine spannungsempfindliche Ausschaltvorrichtung zu verwenden. Unterhalb
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Proof that the high electron emission can be ascribed to a thorium skin is the fact that metallic thorium has a very high emission of electrons for a given temperature compared to tungsten, even if it is free from superficial oxidation.
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due to its low melting point and its easy oxidizability.
At 2000 to 2300 K the active thorium slowly diffuses from the inside of the metal to the surface. As the temperature rises, a point is reached at which the
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To operate the cathode at a temperature between 2000 and 22000 K for a long time without destroying its high electron emission, but operation at a higher temperature is not recommended. A large amount of electrons can be emitted in the temperature range specified above, while at the same time saving energy for heating the cathode.
Discharge vessels with cathodes of the specified type can be used for a wide variety of purposes, e.g. B. as a rectifier or to amplify electrical oscillations, etc. The thorium does not have to be inherently contained in the cathode during its manufacture, but it can also create an initially thorium-free cathode
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outgpht. This fact can be used to use a thoriated cathode eluthaltpndL discharge tube as a voltage sensitive cutoff device. Below
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Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74657XA | 1914-07-15 | 1914-07-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT74657B true AT74657B (en) | 1918-09-10 |
Family
ID=21726325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT74657D AT74657B (en) | 1914-07-15 | 1915-07-08 | Electrical discharge vessel for pure electron discharge. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT74657B (en) |
-
1915
- 1915-07-08 AT AT74657D patent/AT74657B/en active
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