DE319852C - Equipment on metal vapor rectifiers, in which an insulating intermediate piece is inserted into the metal pipe connection leading from the metal vacuum vessel to the permanently connected air pump - Google Patents
Equipment on metal vapor rectifiers, in which an insulating intermediate piece is inserted into the metal pipe connection leading from the metal vacuum vessel to the permanently connected air pumpInfo
- Publication number
- DE319852C DE319852C DENDAT319852D DE319852DD DE319852C DE 319852 C DE319852 C DE 319852C DE NDAT319852 D DENDAT319852 D DE NDAT319852D DE 319852D D DE319852D D DE 319852DD DE 319852 C DE319852 C DE 319852C
- Authority
- DE
- Germany
- Prior art keywords
- metal
- air pump
- pipe connection
- intermediate piece
- equipment
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J13/00—Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes
- H01J13/02—Details
- H01J13/28—Selection of substances for gas filling; Means for obtaining the desired pressure within the tube
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0072—Disassembly or repair of discharge tubes
- H01J2893/0073—Discharge tubes with liquid poolcathodes; constructional details
- H01J2893/0074—Cathodic cups; Screens; Reflectors; Filters; Windows; Protection against mercury deposition; Returning condensed electrode material to the cathodic cup; Liquid electrode level control
- H01J2893/0086—Gas fill; Maintaining or maintaining desired pressure; Producing, introducing or replenishing gas or vapour during operation of the tube; Getters; Gas cleaning; Electrode cleaning
Landscapes
- Particle Accelerators (AREA)
Description
Einrichtung an Metalldampfgleichrichtern, bei welchen in die vom metallischen Vakuumgefäß zur dauernd angeschlossenen. Luftpumpe führende metallische Rohrverbindung ein isolierendes Zwischenstück eingeschaltet ist. Bei Metalldampfgleichrichtern mit Metallgefäß und dauernd angeschlossener Luftpumpe ist es zweckmäßig, die metallische Rohrverbindung durch ein isolierendes, gasdichtes Zwischenstück zu unterbrechen. Die Erfahrung hat gelehrt, daß die Innenwandung des Isolierstückes durch Glimm- oder Lichtbogenentladungen zwischen den anschließenden Metallflächen allmählich geschwärzt wird. Der Niederschlag ist zum Teil gut leitend und führt mit der Zeit zur vollständigen Aufhebung der Isolation.Equipment on metal vapor rectifiers, in which the metal Vacuum vessel to the permanently connected. Metallic pipe connection leading to the air pump an insulating intermediate piece is switched on. With metal vapor rectifiers with a metal vessel and permanently connected air pump, it is advisable to use the metallic Interrupt the pipe connection with an insulating, gas-tight intermediate piece. Experience has shown that the inner wall of the insulating piece is caused by glowing or arc discharges gradually between the adjacent metal surfaces is blackened. The precipitation is partly very conductive and leads over time to completely remove the isolation.
Die Erfindung bezweckt deshalb, eine Einrichtung zu treffen, um einerseits die bezeichneten Entladungen zu lokalisieren und andererseits ihr Auftreten möglichst zu unterdrücken. Hierbei stützt sie sich auf die aus der Physik der elektrischen Entladungen bekannte Erscheinung, daß bei starker Annäherung zweier Elektroden infolge der stark verkürzten, freien Wegstrecke eine Stoßionisierung nicht zustande kommen kann. Infolgedessen tritt auch eine Verzögerung oder gänzliche Unterbindung der Entladung auf.The invention therefore aims to provide a device to on the one hand to localize the designated discharges and, on the other hand, their occurrence as far as possible to suppress. In doing so, it relies on the physics of electrical engineering Discharges known phenomenon that when two electrodes come close together as a result the greatly shortened, free path an impact ionization does not come about can. As a result, there is also a delay or complete prevention of the Discharge on.
In beiliegender Zeichnung stellen l,. und 1, Teile der Vakuumleitung mit den Flanschen f, und f= dar. Ein Isolator i bildet das trennende Zwischenstück, welches beiderseits mittels Gummiringe gasdicht abschließt. Auch die zur Pressung verwendeten Schraubenbolzen sind mittels Rohr 1a und Unterlagsscheibe in isolierend angebracht. Mit den Flanschen f 1 und f 2 elektrisch gut verbunden sind die Elektroden a und b, die sich in einem verhältnismäßig geringen Abstand x gegenüberstehen. Die Entfernung x wird derart klein bemessen, daß zwischen den Elektroden die freie Weglänge für eine Stoßionisierung nicht genügt. Bei einem Abstand von 5 mm z. B. hören die Entladungen oberhalb Vakua von o,2 mm Quecksilberdruck vollständig auf, während bei Abständen von 2o mm und mehr noch bei o,o5 mm Druck lebhafte Entladungen zu beobachten sind: Da die unterste Grenze für den normalen Betriebsdruck vom Metalldampfgleichrichter mit etwa o,i mm Quecksilbersäule gegeben ist, genügt die hier beschriebene Maßnahme, um die Isolierfähigkeit des in die Vakuumleitung eingesetzten Isolators zu erhalten,.In the accompanying drawing, l ,. and 1, parts of the vacuum line with the flanges f, and f = represent. An insulator i forms the separating intermediate piece, which is sealed gas-tight on both sides by means of rubber rings. The screw bolts used for pressing are also attached in an insulating manner by means of tube 1a and washer. Electrodes a and b, which are opposite each other at a relatively small distance x, are electrically well connected to the flanges f 1 and f 2. The distance x is made so small that the free path between the electrodes is insufficient for impact ionization. At a distance of 5 mm z. B. the discharges cease completely above a vacuum of 0.2 mm mercury pressure, while at distances of 20 mm and more vigorous discharges can be observed even at 0.05 mm pressure: Since the lowest limit for the normal operating pressure of the metal vapor rectifier is about o , i mm of mercury column is given, the measure described here is sufficient to maintain the insulating capacity of the insulator inserted in the vacuum line.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE319852T |
Publications (1)
Publication Number | Publication Date |
---|---|
DE319852C true DE319852C (en) | 1920-04-07 |
Family
ID=6152422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT319852D Expired DE319852C (en) | Equipment on metal vapor rectifiers, in which an insulating intermediate piece is inserted into the metal pipe connection leading from the metal vacuum vessel to the permanently connected air pump |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE319852C (en) |
-
0
- DE DENDAT319852D patent/DE319852C/en not_active Expired
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