DE1021498B - Gas or vapor discharge tubes with a cold cathode - Google Patents
Gas or vapor discharge tubes with a cold cathodeInfo
- Publication number
- DE1021498B DE1021498B DEL24794A DEL0024794A DE1021498B DE 1021498 B DE1021498 B DE 1021498B DE L24794 A DEL24794 A DE L24794A DE L0024794 A DEL0024794 A DE L0024794A DE 1021498 B DE1021498 B DE 1021498B
- Authority
- DE
- Germany
- Prior art keywords
- gas
- cold cathode
- discharge tube
- gas discharge
- discharge tubes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/30—Igniting arrangements
- H01J17/32—Igniting by associated radioactive materials or fillings
Landscapes
- Discharge Lamp (AREA)
Description
Gas- oder Dampfentladungsröhre mit einer Kaltkathode Die handelsüblichen Gas- oder Dampfentladungsgefäße mit kalter Kathode (Kaltkathodenthyratrons) erfordern zur Zündung eine hohe Starteranodenspannung im Gegensatz zu den Entladungsröhren mit Glühkathode. Dies ist aus dem Mechanismus der Zündung bedingt. Während bei einer Glühkathode nach dem Aufheizen die zur Zündung benötigten Elektronen ständig vorhanden sind, müssen sie bei Verwendung einer Kaltkathode erst durch ein starkes elektrisches Feld erzeugt werden. Dieses Feld wird zur Einleitung der Zündung zwischen der Starteranode und der Kathode aufgebaut und ermöglicht unter anderem den Elektronenaustritt aus der Kathode. Die hierfür notwendigen hohen Feldstärken zwingen zur Anwendung einer zusätzlichen hohen Spannung.Gas or vapor discharge tube with a cold cathode The commercially available ones Gas or vapor discharge vessels with a cold cathode (cold cathode thyratrons) require for ignition a high starter anode voltage in contrast to the discharge tubes with hot cathode. This is due to the ignition mechanism. While with a The electrons required for ignition are always present after heating up the hot cathode when using a cold cathode, they must first be replaced by a strong electrical one Field can be generated. This field is used to initiate ignition between the starter anode and the cathode and enables, among other things, the escape of electrons the cathode. The high field strengths required for this force the use of a additional high voltage.
Auch sind Gas- oder Dampfentladungsröhren mit kalter Kathode bekanntgeworden, bei denen die Starteraüodenspannung durch Verwendung eines radioaktiven Präparates verringert wird. Hierzu werden jedoch Strahler verwendet, die unter anderem zunächst das Gas oder den Dampf ionisieren sollen. Für Gasentladungsröhren mit Gittersteuerung (Thyratrons), die häufig mit rasch aufeinanderfolgenden Impulsen gezündet werden müssen, ist eine Zündung ohne jegliche Verzögerung erwünscht.Gas or vapor discharge tubes with cold cathodes have also become known, where the starter electrode voltage is achieved by using a radioactive preparation is decreased. For this purpose, however, emitters are used, which among other things initially to ionize the gas or vapor. For gas discharge tubes with grid control (Thyratrons), which are often ignited with pulses in rapid succession ignition without any delay is desired.
Um dies bei einer Dampf- oder Gasentladungsröhre mit Kaltkathode zu erreichen, ist erfindungsgemäß die Kaltkathode mit einem künstlichen radioaktiven Element oder seiner Verbindung präpariert, das ausschließlich ein ß-Strahler ist. Als geeignet hierfür sind die Elemente Eu, H, C, Cs, TI, Sr bzw. deren Verbindungen. Derartige Kathoden zeigen die gleiche Erscheinung des ständigen reinen Elektronenaustritts wie die geheizten Kathoden.To do this with a vapor or gas discharge tube with a cold cathode achieve, according to the invention, the cold cathode with an artificial radioactive Element or its compound prepared, which is exclusively a ß-radiator. The elements Eu, H, C, Cs, TI, Sr or their compounds are suitable for this. Such cathodes show the same phenomenon of constant pure electron leakage like the heated cathodes.
Es ist bekannt, daß die Entionisierung des Gases die Schaltfrequenz eines gittergesteuerten Gasentladungsgefäßes begrenzt. Zur Erzielung einer erhöhten Schaltfrequenz kann erfindungsgemäß die Entionisierungszeit durch geringe Zusätze zum Gas, z. B. durch Halogene, verbessert werden. Geeignet ist beispielsweise ein geringer Zusatz von Fluor oder Molybdänfluorid (MoFE), insbesondere bei Verwendung von tvlolybdänkathoden. Auch Wasserstoff und/oder Alkoholdampf kann in geringen Mengen zugesetzt werden. Die Verwendung dieser Zusätze zur Verkürzung der Entionisierungszeit ist nicht nur bei Kaltkathoden entsprechend der Erfindung geeignet, sondern kann auch bei geheizten Kathoden angewendet werden.It is known that the deionization of the gas affects the switching frequency limited by a grid-controlled gas discharge vessel. To achieve increased According to the invention, the switching frequency can reduce the deionization time by adding small amounts to the gas, e.g. B. by halogens can be improved. For example, a is suitable low addition of fluorine or molybdenum fluoride (MoFE), especially when used of tvlolybdenum cathodes. Hydrogen and / or alcohol vapor can also be used in small amounts Quantities are added. The use of these additives to reduce the deionization time is not only suitable for cold cathodes according to the invention, but can can also be used with heated cathodes.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL24794A DE1021498B (en) | 1956-05-05 | 1956-05-05 | Gas or vapor discharge tubes with a cold cathode |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL24794A DE1021498B (en) | 1956-05-05 | 1956-05-05 | Gas or vapor discharge tubes with a cold cathode |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1021498B true DE1021498B (en) | 1957-12-27 |
Family
ID=7263207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEL24794A Pending DE1021498B (en) | 1956-05-05 | 1956-05-05 | Gas or vapor discharge tubes with a cold cathode |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1021498B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1073637B (en) * | 1960-01-21 | Philips Patentverwaltung G.M.B.H., Hamburg | Grid controlled electron tube |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1875151A (en) * | 1928-02-07 | 1932-08-30 | Westinghouse Lamp Co | Glow relay tube |
FR915247A (en) * | 1944-12-21 | 1946-10-30 | activated electrode for luminescent tubes | |
US2668254A (en) * | 1950-06-22 | 1954-02-02 | Raytheon Mfg Co | Corona discharge voltage regulator |
-
1956
- 1956-05-05 DE DEL24794A patent/DE1021498B/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1875151A (en) * | 1928-02-07 | 1932-08-30 | Westinghouse Lamp Co | Glow relay tube |
FR915247A (en) * | 1944-12-21 | 1946-10-30 | activated electrode for luminescent tubes | |
US2668254A (en) * | 1950-06-22 | 1954-02-02 | Raytheon Mfg Co | Corona discharge voltage regulator |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1073637B (en) * | 1960-01-21 | Philips Patentverwaltung G.M.B.H., Hamburg | Grid controlled electron tube |
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