DE2249611A1 - GAS DYNAMIC DISCHARGE LIGHT SOURCE - Google Patents

Description

The present invention relates to gas dynamic © pulse discharge ο ο l igh ig ht ings, in particular gacdynamic discharge light sources, the one radiation in the optical wave range generate the by'.yechse! effect of shock waves and plasma currents arises

There is no known gas discharge device, the radiation of the optical skin caused by shock waves and for the investigation of highly tempered plasma or » is used as a light source (US-PS Hr * 3 289 ° 26, Kl » 3513-231, 1966).

The device mentioned is designed in the form of a T-tube. Your discharge scanner is busting out of the list of the aforementioned Pipes with two mounted at their opposite ends Electrodes between which the discharge takes place «

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In the process, shock waves and gac-charge plasma are planted in a cylindrical shape coupled with the discharge chamber Port set continued.

A gas-dynamic discharge light source is also known (GDR patent no. 86 226, cl. 21 82/01, announced on 5 · 12 · 1971) with two cylnder-shaped discharge chambers In preliminary connection via an optically transparent tube that is intended for the emission of radiation · That mentioned tube is connected with cylindrical shaped discharge chambers, which consist of dielectric material.

Disadvantages of the above-mentioned facilities form a nlodriger Efficiency of the conversion of the electrical energy supplied to the discharge into the light emission

It is the purpose of the present invention to provide one with the to create a light source that is not affected by the night spots mentioned.

The invention has the object to-round, a compact and reliable gas-dynamic ^ discha ^ slichtiiuelle to cchaffen _t on the V / echsclwirkung of entgogengerlchteten Sto2wellen and bowcgllchen GaεontladuJnf; based sρlasma3trömungθn, an increased efficiency of converting the zugofuhrten Lleictroonörgle ensured In the Jjlchtemisfcjton and the possibility offers, in short, flashes of light and large density of the radiation emanating from the luminous part of the facility with an increased level of radiation in the

area)

Ultraviolet / Win.

the geotollto task is thereby r ^ e-

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The fact that in the gas dynamic discharge light source the at least two working medium-filled discharge chambers consisting of a temperature-resistant dielectric material with light-sensitive properties have ₉ which are connected to one another at least via an optically transparent tube and electrode units with working electrodes ₉ between which electrical current is conducted, which carries the gas discharge plasma and the shock waves generated in the mentioned tube ₉ contain

and connected to controlled Elektroenerglelmpulsspe icher , erf ii

Slnd ^ dle electrode units in each discharge scamiaer Xn In the form of a zontral electrode, which at one end Each of the discharge chambers is mounted, and a ring electrode unit which is coaxial with the central electrode

Connection
unit In the area where the optically transparent tube is mounted, the optically transparent tube is provided with a means for pre-ionization and for transport via the aforementioned electrode layers, at least part of the working fluid from the tube into the aforementioned discharge chambers '*

Each discharge chamber is expediently designed in the form of a hollow truncated cone, each discharge chamber advantageously being surrounded on the outside by a metal housing which ^{corresponds to the} shape of the respective discharge chamber. Their rare walls are mechanically fastened and electrically connected to one of the electrode elements, e.g. the electrode element.

It is possible to take the aforementioned unloading comers into the Torn

to form hollow cylinders with a Metttllgthjius includes the fact that the shape of the respective cargo chamber is not dependent on it

and with your open parts within the t; oraelneam «i optically transparent tube on the opposite side Ends are housed "

There is two flow, each discharge chamber from one

* · ton ^ orüturbostierenden ljor »mlsohon material, which from the Group of beryllium-aluminum and tin oxide is chosen, and the optically transparent tube aas ^ eschmolzonem ^ uarz-Ellas, polycrystalline Aluolnlumoxld to produce * £ a let mo & llah, jode discharge ^ chamber from an optlBoh

• lAttT

make the material and with a shift * Coating substance that diffuses or diffuses the LlohtemiBslon specularly reflected «It is advisable to use the Ui.Uel for pre-ionization in the gas dynamic discharge light source and for transporting at least one Toll of the work equipment! from the optically through the loht Uohr into the discharging catxiern ■ during the work of the cleaning process in the form of auxiliary selections to be carried out, which provides an additional discharge stretch. blldeni Mounted in dom mentioned op ^ iooh permeable pipe and to controlled Eloktroinerglelm ^ uluspelcher autonomously angeoohloscen are sowlo olno generate discharge whose beginning precedes the discharge in the chambers and continues with it continues "It is also possible to use the remedy for pre-ionization

tion and for the transport of a great ^{dose of work equipment}

copy "

BATH ORIGINAL

optically transparent tube into the

to train from olnor Hllfoelectrcdo, di °

_ «. 4. ..t ,, _π λ at least iplt optically transparent Lohr elncefuhrt lot »° ^a

"Ine. to Zloktrodenalahelton, eg dor _I1W5 elektrodonemhon gomelnsam * lno in addition, jäutladunüslitroclt · forms ils ltonltisl, which fills inBonraum dor mBrlchtunc 1 ™ einom Edoleus, solion uua dor group Ha, U. K ₁ Bbί, De, Te _s, o.Sh ». Elements odor your Italosenverbl * -

fertilize for Elnsutz

By means of the preliminary pulse discharge light source, the echae! Effect of 3-to-3-well and mobile plasma is used more effectively of the gas discharge plasma for cold gas heating _2U and the radiation that emanates from the area of interaction between shock waves and plasma films »

to use more effectively '^

The gas-dynamic pulse discharge light source is Generation of repetitive short-term, powerful flashes of light intended mainly for Optical excitation of active media can be used in organic dye liquid lasers. the Einrlchtune can with phyalkallech-formerly examinations *.! Impulse photolysis of gases and solutions, in the case of Llohtslgnalgeraten etc. can be used with advantage

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BATH ORIGINAL

In the following, the invention will be explained in more detail using your exemplary embodiments, with reference to the accompanying drawings explained} show it

1 with a gas dynamic discharge lamp source conical lintladun ^ skatnmern (in front view with Tollschnltt),

2 is a block diagram of the discharge device, Pig · 3 an executor of the establishment mif zylln of the shaped design stems (in front view with

Tellschnltt), FIg * 4 «A gas dynamic discharge light source with BLLfo elektrodenelnhelt (longitudinal section and block diagram

the starting and control equipment), Flg. 5 θΐηο constructive version of the Elnrich device with two auxiliary electrodes

The gaodynamic discharge light source 1 shown in FIG Tube 3 are coupled, for example made of fused quartz glass exists and serves to exit the turbulence. At opposite ends is the aforementioned optically transparent tube 3 with expanding Kego! transitions 4 · (with an opening angle of 40 °), which end with ring flanges 5, which · for vacuum brazed and mechanical connection of the optlsoh Durdhalchtlgen tube 3 with the discharge chamber 2 is determined

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BATHROOM OBIGINAL

Each discharge chamber 2 of the device is in the form of tinea conical body of revolutionβ formed on the base If the discharge chamber 2 is provided with a longitudinal flange 6 and made of a temperature-resistant dielectric material with light reflection properties, e.g. made of beryllium, aluminum oxide or similar material Carry out the chamber from molten resin, which with a layer 7 of up to the Uullporosltät sintered silicon

dloxld coated 1st, which diffuses the radiation diffusely Each of the specified discharge cameras 2 is about the

Rlngol electrode elements 8, the flange 6 mentioned between domes is arranged on the base of the conical chamber 2 and the flange 5 of the optically transparent Rohrta J, with coupled to the optically transparent tube 3 »The Ringeloktrodeg Unit 8 is an asymmetric one made of molybdenum Rlngtellig, the inner surface is rounded and fulfills the function of the effective surface of the electrode The upper and lower surfaces are connected to the flanges 5 and 6 between the flange 6 of the discharge duct 2 and the flange 5 of the optically transparent tube 3 is in the gap between you a heremtiswrend substance 9 oceceen ·

The above-mentioned conical discharge chamber 2, which u »u The load space is limited, and at its tip it merges into a cylinder foot 10, in which the outer surface of a tungsten belt electrode 12 and a Ut foot 10 hemetlooh hollow brace door 13

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BATH ORIGINAL

existing Zentraleielctrodenelnhelt 11 is assembled «The Ring electrode element 8 BBiA central electrode element 11 old Arbeltelectrode 12 form a discharge path.

The discharge chamber 2 is encompassed by a metal housing 14 in the form of a truncated cone, which the radio

M A.

tion of a live conductor fulfilled "

This metal housing 14 directly adjoins the layer

7 on and is L with the outer wall of the ironing electrode mechanically and electrically connected · Δη of the smaller base area of the conical discharge chamber 2 are power supply elements 15 arranged to obtain a selective

Cs radiation come from the group Na, Ll ₁ K ₉ Rb, ^v Hg, Cd ₁ Zn and Te selected elements and their halogen compounds as Arbeltsmittel filling up the I _n nenraum setting up the mixture with a Idelgas, used · The gas-dynamic

Discharge light source 1, the drawing of which is shown in Flg, 1, is e.g. filled with Hg

via controlled unloaders 1ü or 19, which are from a Zwelkanal-Serlenzündstell 20, which is an inheritance of the Causes discharge in both discharge chambers 2 at the same time, respond, the pressure up to a pressure of 20 to 50 mm Q.S Xenon-filled gas dynamic discharge light source 1 in two

independent weakly inductive circuits 16 and 17 switched (Fig. 2) · When examining the process of interaction between shock waves and gas discharge plasma as well as with The operating mode preset table offers the operating mode selection

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21 the possibility ^ the two-channel series ignition part 20 and to control the start of discharge in chambers 2 (Flg · 1) »

The two hanging electrodes 8 are used as the anode (or haterpolar) switched. The direction of discharge currents In the two discharge paths, the current directions are In opposed to the metal housings 14 encompassing the chambers 2 »

The In Flg. 3 shown embodiment variant β of the gas djtnamischen Discharge light jellyfish 1 contains discharge chambers 22, the In the form of (in contrast to Flg. 1) with cylindrical förialgen Metallgahausen 23 comprised Hohlzyl Indern executed " and in expanding Zyllndertellen 24 at the opposite Ends of the optically transparent tube 3 assembled are.

The In Flg. 4 shown design variant the gas dynamic discharge light source 1 contains a Discharge chamber 2 of the cone type with central electrodes 11 and as a means of pre-ionizing and transporting the Work means from the optically transparent tube 3 is the Auxiliary electrode unit 25 with a living electrode 26 provided therein, with the Rlngclektrodoneinhalt 8 of the Discharge chamber 2 forms a discharge path, which on the Entladekrals in the form of a langa ^ made of dral capacitors 27, 28, 29 ζusancengGsetzt v ^^ be placed · Zum Protection of the elements of dlose pipeline, which are necessary for an operational voltage of about 5 kV are designed against occurring high potentials of the main discharge in chamber 2 takes place

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- ΊΟ -

o a saturation choke 30 use · The discharge is initiated in the additional path via the ignition position 31 »The schv / achlnduktlve circuit (O ₁ IbIeO, 4 MKH) consists of an electrical energy charger 32 in the form of a capacitor battery} which is charged via a rectifier J> 3 ,. In the discharge path between the SleL-Trodenelnhelten 8 and 11, the discharge is fed by an external charger 34- which responds to the Serlon ignition part 35. The discharger 34 is controlled with the aid of a phase reversal stage 36.

The FIG. 5 s ^ozel S * e constructive Ausfüiirungsvarlante the gasdynamlsclien discharge light source 1 is different from that in Flg. 1 shown light source in that in the optically transparent tube 3 a means for Vorlonlsation and additional transport of the operating medium from the optically transparent drilling 3 is introduced, which represents two auxiliary electrodes 37 and 38, between which a pre-discharge takes place, with the multiple capacitor 39 of the long v * is connected to the mentioned auxiliary electrodonels 37 and 30 and responds to the ignition coil 40, a discharge is initiated in the additional discharge path in the optically transparent tube 3 , which is discharged into the heated chamber 2 when the ignition position 42 is triggered.

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■ - 11 -

Takes place during a brief pulse discharge at the same time, as shown in Figs. 1 and 2, in the two Scanning discharge 2 (due to the magnetic field of the current flowing in metal housing 14 and ring electrode unit 8)

C deBBioh forming n Plasmas> a magnetic compression ^ in the direction of the longitudinal axis

the -

chamber 2. This phenomenon is caused by the 'Plnch effect', with radial compression at the working electrode

12 of the central electrode element 11 (each discharge chamber 2 hid

begins ~ and "fall of the surface there mentioned! electrode 12 closer plasma battles detected. Then the heated is compressed Plasma into the optically transparent tube 2

both
Dismissed early from ^ ijitladungskamaern 2, by it

strong thrust generated · This is in the undisturbed gas

de »a significant photoionization of the particles before * strong Shock waves and the moving plasma are observed, which causes rapid mixing of plasma and shock-heated gas. At the Coincidence of shock waves in the middle part of the optical transparent tube 3 is observed in hocliintenslves glow Dor'.Range of effects of shock waves and moving Pl-sma zöichnat by increased luminance of the

Radiation of the continuous spectrum. V / enn to the Lntladekrels In the form of a long, out

■ Leadership

a multiple capacitor 29 composed ν . Electrode elements 37 and 28 (Flo 5) or auxiliary electrode units 25 and ring electrode units 8 (Fig. 4) can be connected _f will <4 ^em 100 to 400 ms lance electrical impulse, the In

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the additional discharge path is generated, a shorter one

10 to 30 ms long pulse superimposed, which is generated by the tfvhwach, -induktlven storage 352 or 41 of electrical energy (Flg. 4, 5)

its finergy
is generated, ν exceeds the energy of the auxiliary discharge 10 to 20 times · The discharge in the additional discharge path increases the gas density in the discharge chamber 2 (or · 22) · This increases the kinetic energy of the plasma flows! which is (or · 22) in the discharge in the chambers 2 _t ausbllden and contributes to an increase in speed of the shock waves at the port below by the ionized · gas from a Compared to the gas without pre-discharge lower density in the optically transparent tube 3 · The specified factors cause a rise in the temperature of the ionized gas of the radiating currents and an intensification of the uniform filling process of the optically transparent Eohres 3 nil * radiating plasma ·

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Claims (4)

- 12 PATENT CLAIMSJ M, ^ Gasdynamisch © discharge light source, which has at least two arbeltsmittelgefUllte, made of a temperature-resistant dielectric material with light reflection properties are existing discharge chambers, which are connected to each other at least via an optically transparent tube and electrode elements with arbeltselelectrodes, between which electrical current is conducted, the gas discharge and the shock waves in said tube it is sufficient se, ^a ufweisen and connected to controlled Elektroenerglelmpulsspelcher _f slnd characterized. That is, the electrode cells in each discharge chamber (2) are in the form of a central electrode core (11) mounted at one end of each of the discharge chambers (2) and a ring electrode unit (8) coaxial with the central electrode core (11) in the area of the connector of the optically transparent tube (3) is mounted, the optically transparent tube (3) having a means for pre-ionization and transport He needed the mentioned electrodes (8 and 11) / at least part of the working fluid from the pipe (3) into the called discharge chambers (2) "is provided, 2. Gas-dynamic Ehtladungsllchtquelle according to claim 1, characterized, ge k ^ e n r iqο lehnet _t that each discharge chamber (2) in the form of a hollow truncated cone it is executed ¹ » 3, gas dynamic discharge light source according to claim 1 309819/0697 1249611 and 2 ₉ characterized in that each discharge chamber (2) is surrounded on the outside with a metal housing (14) which corresponds to the shape of the respective discharge chamber (2). Their rare walls mechanically fastened and with elfer de * electrode retractors »ζ · Β. the ring electrode retractor (8) is electrically connected * 4. Gas dynamic discharge light source according to claim 1 _f f ff ^ urch characterized “ that the mentioned discharge chambers (22) are designed in the form of hollow cylinders, with a“ metal housing (23). which corresponds to the shape of said discharge chamber (22), encompasses and with its open parts within the common optically thick tube (3) on the opposite one Ends are housed 5, Gasdynamisch ^ ümtladun & Sllchtquelle according to claim 1 to 4 | characterized rq indicates that each discharge _{chamber (2 f} 22) made of a temperature-resistant material selected from the group of beryllium, aluminum and titanium oxides, and the optically transparent tube (3) made of fused quartz glass ^ polycrystalline aluminum oxide are" 6 «Gasujη" mix discharge light source of Claim 1 _t 2 and 4 | thereby p; eicennzolehnet . that each discharge _{chamber (2 t} 22) made of an optically transparent .Verkstoff and with one
a Cciilcht 1st outweighed (7) ^v substance, light emission, the diffuse or specularly reflected. ■ 7 · Gas dynamic ^ discharge light source according to APßP ^ Uch 1, f ^ mark lehnet ι that the means for pre ionization and zub 309819/06 ^ 7 Transporting at least one plate of the work means out of the optically transparent tube (3) into the discharge chambers (2) while the work in the form of auxiliary electrodes (37, 38) is carried out, which provides an additional discharge path, Mounted in the aforementioned optically transparent tube (3) and to controlled Elektroenerglelmpulsspelcher (4-1) autonomously are connected and generate a discharge, the beginning of which precedes the discharge in the discharge chambers (2) and at the same time lasts 4amlt 8 · Gasdyaamlsche discharge light source of Claim 1 _f d ABy, g ekennzeichnet _r that the means for pre ionisation and transporting a part of the working medium of the optically transparent tube (3) formed in the discharge chambers (2) in the form of an auxiliary electrode (25) which is mounted in the mentioned optically transparent tube (3) and connected to the controlled electrical energy pulse storage (32) and at least with a 4-way electrode element, e.g. the ring electrode unit (8) ₍ together forms an additional discharge path « 9, line dynamic discharge light source according to claim 1, characterized in that it is connected . that as Arbeltsmittel that fills their interior in a mixture with a noble gas, from the ¹ A Group Na ₁ V ₉ K, Rb, Hg, Cd, Zn, Te selected elements or their halogen compounds can be used. 309819/0697 Blank page