JPH01122586A - Discharge tube - Google Patents
Discharge tubeInfo
- Publication number
- JPH01122586A JPH01122586A JP27910187A JP27910187A JPH01122586A JP H01122586 A JPH01122586 A JP H01122586A JP 27910187 A JP27910187 A JP 27910187A JP 27910187 A JP27910187 A JP 27910187A JP H01122586 A JPH01122586 A JP H01122586A
- Authority
- JP
- Japan
- Prior art keywords
- tip
- electrodes
- cathode
- discharge
- discharge tube
- 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
- 239000011261 inert gas Substances 0.000 claims abstract description 6
- 239000011521 glass Substances 0.000 claims abstract description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052786 argon Inorganic materials 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 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
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
(産業上の利用分野)
本発明は例えば高電圧パルス発生装置に組み込まれるス
パークギャップ等に使用される放電管に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a discharge tube used, for example, in a spark gap incorporated in a high voltage pulse generator.
(従来の技術)
一般に高圧放電灯特にショートアークタイプのキセノン
ランプや超高圧水銀ランプ等は始動電圧が高いため、始
動の際には高電圧パルス発生装置により数四〜数十「の
高電圧パルスを瞬時的にランプの主電極間に印加させて
放電を開始させるよ内蔵されている。(Prior art) In general, high-pressure discharge lamps, particularly short-arc type xenon lamps, ultra-high-pressure mercury lamps, etc., have high starting voltages, so when starting them, a high-voltage pulse generator is used to generate high-voltage pulses of several four to several tens of inches. It is built in to instantly apply the voltage between the main electrodes of the lamp to start the discharge.
第3図はこのような高電圧パルス発生装置の−ま
例を示し、t<ず、A−B間に直流電圧を印加するとコ
ンデンサCに蓄電する。ついで放電管(3)の両電極間
に電圧がかかり、放電管(3)の放電開始電圧に達する
と放電管(3)内に放電が起こり、抵抗Rを通りD−E
間に電流が流れてパルストランスPTの2次側つまりラ
ンプ(4)の両端に高電圧パルスが印加されランプ(4
)が始動する。したがって、放電管(3)の放電開始電
圧は2パルストランスPTの2次側に発生するパルス電
圧値に対し大きな影響を持つ。FIG. 3 shows an example of such a high-voltage pulse generator. When a DC voltage is applied between A and B at time t, electricity is stored in a capacitor C. Next, a voltage is applied between both electrodes of the discharge tube (3), and when the discharge starting voltage of the discharge tube (3) is reached, a discharge occurs within the discharge tube (3), passes through the resistor R, and discharges D-E.
A current flows between them, and a high voltage pulse is applied to the secondary side of the pulse transformer PT, that is, both ends of the lamp (4).
) starts. Therefore, the discharge starting voltage of the discharge tube (3) has a large influence on the pulse voltage value generated on the secondary side of the two-pulse transformer PT.
ところが、従来の上記放電管(3)は、その放電開始電
圧のバラツキが犬きく、シたがって高電圧パルス値も変
動してランプの始動が困難となる場合があった。However, in the conventional discharge tube (3), the discharge starting voltage varies widely, and therefore the high voltage pulse value also fluctuates, making it difficult to start the lamp.
(発明が解決しようとする問題点) 上記のように従来のこの種放電管にあっては。(Problem that the invention attempts to solve) As mentioned above, in conventional discharge tubes of this type.
その放電開始電圧のバラツキが大きく2例えば始動電圧
の高い高圧放電灯の始動に用いられる高電圧パルス発生
装置に組込まれた場合、ランプの始動が困難となり1点
灯しないという不都合を生じることもあった。If the discharge starting voltage varies widely2, for example, if it is incorporated into a high-voltage pulse generator used to start a high-pressure discharge lamp with a high starting voltage, it may be difficult to start the lamp, resulting in the inconvenience that the lamp will not light up. .
そこで本発明は上記従来の欠点を解消するもので、放電
開始電圧のバラツキが小さい放電管を提供することを目
的とする。SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned conventional drawbacks, and aims to provide a discharge tube with small variations in discharge starting voltage.
(問題点を解決するための手段)
本発明の放電管は、不活性ガスを封入したガラスバルブ
内に一対の電極を対設し、陰極側となる電極の先端を平
担とすると共に2両電極の先端間距離をl (II)
、上記平担な電極先端の面積をS (+++++t)と
したとき。(Means for Solving the Problems) The discharge tube of the present invention has a pair of electrodes disposed opposite each other in a glass bulb filled with an inert gas, the tip of the electrode serving as the cathode side is flat, and two electrodes are provided. The distance between the tips of the electrodes is l (II)
, when the area of the flat electrode tip is S (+++++t).
1/S≦13 を満足するように構成される。1/S≦13 configured to satisfy the following.
(作 用)
このような構成によれば、陰極となる電極の先端は平担
に形成されているから、尖かった場合のような集中電界
の発生は防止されて電界は分散され、高い放電開始電圧
が得られる。したがって高電圧パルス発生装置に組込ん
だ場合、パルストランスの2次側に発生するパルス電圧
値を高くしてランプの始動を容易にすることが可能とな
る。(Function) According to this configuration, since the tip of the electrode that becomes the cathode is formed flat, the generation of a concentrated electric field that would occur if the tip was sharp is prevented and the electric field is dispersed, resulting in a high discharge. A starting voltage is obtained. Therefore, when incorporated into a high-voltage pulse generator, it is possible to increase the pulse voltage value generated on the secondary side of the pulse transformer, thereby making it easier to start the lamp.
また、陰極側先端を平担にした場合、電極先端間距離l
が長が過ぎると、陰極輝点が上記平担部の周縁に生じた
場合、アークは湾曲してそのアーク長は上記輝点が平坦
部中央に生じた場合と相違し、このため放電開始電圧に
大きなバラツキを生じるが、陰極先端の面積5(−)に
対する電極先端間距離/(mx)の比をl/S≦13と
することにより。In addition, when the cathode side tip is made flat, the distance between the electrode tips is l
If the cathode bright spot occurs at the periphery of the flat part, the arc will curve and the arc length will be different from that when the bright spot occurs at the center of the flat part, and therefore the discharge starting voltage will decrease. However, by setting the ratio of the distance between the electrode tips/(mx) to the area 5(-) of the cathode tip to l/S≦13.
このバラツキを実用上支障のない程度まで小さくするこ
とができる。This variation can be reduced to a level that does not pose a practical problem.
(実施例)
以下2図面に示した一実施例に基づいて本発明の詳細な
説明する。第1図は本発明に係るキセノンランプ始動用
の高電圧パルス発生装置に組込まれる放電管の縦断面図
を示し、(1)はガラスバルブでその両端は気密に封止
されて封止部(la)、(lb)を形成し、内部には不
活性ガスたとえばアルゴンガスが3気圧の圧力で封入さ
れている。(2人)は陰極、 (2B)は陽極で、い
づれも高融点金属例えばタングステンからなり、上記ガ
ラスバルブの封止部(la) 、 (lb)をそれぞれ
気密に貫通し1両電極(2A) 、 (2B)の先端間
距離lは1.5龍に設定されている。また上記陰極(2
人)の先端は第2図に示すように平担(2Aa)に形成
され、その平担部(2Aa )の面積Sは1.5−であ
る。したがって。(Example) The present invention will be described in detail below based on an example shown in two drawings. FIG. 1 shows a longitudinal cross-sectional view of a discharge tube incorporated in a high-voltage pulse generator for starting a xenon lamp according to the present invention. la) and (lb), and an inert gas such as argon gas is sealed inside at a pressure of 3 atmospheres. (2) is a cathode, and (2B) is an anode, both of which are made of a high melting point metal such as tungsten, and which hermetically penetrate the sealing parts (la) and (lb) of the glass bulb, respectively, and one and both electrodes (2A). , (2B), the distance l between the tips is set to 1.5 dragons. In addition, the above cathode (2
The tip of the human body is formed into a flat part (2Aa) as shown in FIG. 2, and the area S of the flat part (2Aa) is 1.5-. therefore.
1 (1!iり/ S (ma) = 1となっている
。1 (1! iri/S (ma) = 1.
このような構成の放電管(3)を、上記第3図に示した
ようなショートアークランプ(4)の高電圧パルス発生
装置に組込み使用すれば、上記放電管(3)の放電開始
電圧のバラツキが小さいので、パルストランスPTの2
次側つまりランプ(4)の両端にかかる高電圧パルス値
のバラツ大も小さくすることができ、したがってランプ
の始動は常に容易となり。If the discharge tube (3) having such a configuration is incorporated into a high voltage pulse generator of a short arc lamp (4) as shown in FIG. 3, the discharge starting voltage of the discharge tube (3) can be increased. Since the variation is small, the pulse transformer PT 2
Variations in the high voltage pulse values applied to the next side, that is, to both ends of the lamp (4) can also be reduced, so that starting the lamp is always easy.
確実に点灯させることができる。It can be turned on reliably.
次に上記放電管につき、電極先端間距離I Cmrt’
)および陰極(2人)先端の平担部(2Aa)面積5(
−)を種々変化させて、放電開始電圧Vsのバラツキを
測定した結果を下表に示す。なお、 Vsのバラツキは
次の式で求めた値である。Next, for the discharge tube, the distance between the electrode tips I Cmrt'
) and cathode (2 people) flat part (2Aa) area 5 (
-) were varied in various ways, and the results of measuring the dispersion of the discharge starting voltage Vs are shown in the table below. Note that the variation in Vs is a value calculated using the following formula.
Vsのバラツキは実用的見地から5%以内が望ましいの
で、上記衣の結果からII/S≦13となるように設定
すれば目的を達成できることが判った。From a practical standpoint, it is desirable that the variation in Vs be within 5%, so from the above results it was found that the objective could be achieved by setting II/S≦13.
また、アルゴンに限らず他の不活性ガスを放電管(3)
内に種々の封入圧で封入した場合でも同様の結果であっ
た。In addition to argon, other inert gases can be used in the discharge tube (3).
Similar results were obtained even when the cells were sealed at various sealing pressures.
なお、 Vs自体の値は、一般的にパッシェンの法則V
s = Pdk (Vs :放電開始電圧、P:気体圧
力。In addition, the value of Vs itself is generally determined by Paschen's law V
s = Pdk (Vs: discharge starting voltage, P: gas pressure.
d:電極先端間距離、に:ガス種による定数)で決定さ
れるものであるから容易に設定することができ、したが
ってこれに上記Vsのバラツキ減少手段を加味すれば、
良好なランプの始動を得ることが可能となる。d: distance between electrode tips, d: constant depending on gas type), so it can be easily set. Therefore, if the above-mentioned means for reducing the variation in Vs is taken into account,
It becomes possible to obtain good lamp starting.
さらに2本発明の放電管は、上記高電圧パルス発生装置
用素子として使用されるだけのものではなく2例えばテ
スラーコイル用ギャップやパルス吸収素子等信の目的に
も適用できるものであるが。Furthermore, the discharge tube of the present invention is not only used as an element for the above-mentioned high voltage pulse generator, but can also be used for purposes such as a gap for a Tesler coil or a pulse absorbing element.
上記実施例とは異なり交流で使用される場合には。Unlike the above embodiments, when used in alternating current.
対向する一対の電極が交互に陰極として作用するので、
このような場合は両電極共に上記実施例における陰極と
同様の構成とすることが必要となる。A pair of opposing electrodes alternately act as cathodes, so
In such a case, it is necessary that both electrodes have the same structure as the cathode in the above embodiment.
以上詳述したように本発明の構成によれば、放電開始電
圧のバラツキが小さい放電管が得られ。As described in detail above, according to the configuration of the present invention, a discharge tube with small variations in discharge starting voltage can be obtained.
例えばランプ始動用の高電圧パルス発生装置に組込めば
、ランプの始動を常に容易にして確実に点灯させること
ができる。For example, if it is incorporated into a high-voltage pulse generator for starting a lamp, the lamp can be started easily and reliably lit.
第1図は本発明放電管の一実施例の縦断面図。
第2図は同実施例の陰極の拡大斜視図、第3図は放電管
の一応用例であるショートアークランプの始動用高電圧
パルス発生装置の回路図を示す。
(1)・・・・・・放電管、 (la) 、 (
Ib)・・・・・・封止部。
(2人)・・・・・・陰極、 (2B)・・・・
・・陽極。
(2Aa )・・・・・・平担部。FIG. 1 is a longitudinal sectional view of one embodiment of the discharge tube of the present invention. FIG. 2 is an enlarged perspective view of the cathode of the same embodiment, and FIG. 3 is a circuit diagram of a high-voltage pulse generator for starting a short arc lamp, which is an example of the application of a discharge tube. (1)・・・Discharge tube, (la), (
Ib)...Sealing part. (2 people)...Cathode, (2B)...
··anode. (2Aa)...Hiratanbu.
Claims (1)
向して設置し、陰極側となる電極の先端を平担とすると
共に、両電極の先端間距離をl(mm)、上記平担な電
極先端の面積をS(mm^2)としたとき、l/S≦1
3 を満足するようにしたことを特徴とする放電管。[Claims] A pair of electrodes are installed facing each other in a glass bulb filled with an inert gas, with the tip of the electrode on the cathode side being flat, and the distance between the tips of both electrodes being l (mm). ), when the area of the flat electrode tip is S (mm^2), l/S≦1
3. A discharge tube characterized in that it satisfies the following.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27910187A JPH01122586A (en) | 1987-11-06 | 1987-11-06 | Discharge tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27910187A JPH01122586A (en) | 1987-11-06 | 1987-11-06 | Discharge tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01122586A true JPH01122586A (en) | 1989-05-15 |
Family
ID=17606429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27910187A Pending JPH01122586A (en) | 1987-11-06 | 1987-11-06 | Discharge tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01122586A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014528641A (en) * | 2011-10-11 | 2014-10-27 | ケーエルエー−テンカー コーポレイション | Plasma cell for laser-sustained plasma light source |
-
1987
- 1987-11-06 JP JP27910187A patent/JPH01122586A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014528641A (en) * | 2011-10-11 | 2014-10-27 | ケーエルエー−テンカー コーポレイション | Plasma cell for laser-sustained plasma light source |
JP2017228545A (en) * | 2011-10-11 | 2017-12-28 | ケーエルエー−テンカー コーポレイション | Plasma cell for laser-sustained plasma light source |
JP2019165023A (en) * | 2011-10-11 | 2019-09-26 | ケーエルエー コーポレイション | Plasma cell for laser-sustained plasma light source |
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