CN1073053A - Transverse flow gas laser discharge system - Google Patents
Transverse flow gas laser discharge system Download PDFInfo
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- CN1073053A CN1073053A CN 91107550 CN91107550A CN1073053A CN 1073053 A CN1073053 A CN 1073053A CN 91107550 CN91107550 CN 91107550 CN 91107550 A CN91107550 A CN 91107550A CN 1073053 A CN1073053 A CN 1073053A
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- discharge
- cathode tube
- auxiliary electrode
- laser
- discharge system
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- 239000003990 capacitor Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 239000012212 insulator Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The structure of the discharge system for transverse flow gas laser is characterized by that two anode plates are formed into a flat discharge channel, a cathode tube with water-cooling is placed in said discharge channel, a row of auxiliary electrodes are placed between cathode and every anode plate, and two pulse discharge circuits are respectively formed between auxiliary electrodes and cathode tube and anode plate. The discharge system of the invention has large gas flow, high injection power, can stably and uniformly discharge under high pressure and large current, and can obtain output of multiplied laser power under the condition of not increasing the volume of the laser.
Description
The invention relates to the discharge system of high power transverse flow electricity excitated type gas laser.
Employing is with patent USP3,772,610 and the laser made for the arc chamber on basis of improved patent CN1049575A structure reached five kilowatts output.The characteristics of its structure are to utilize the glow discharge between the strip anode of a sleeve cathode and apportion to form the discharge gain region.The subject matter of this tube-sheet type structure is that the distance between cathode tube and the positive plate can not be very big, is especially more placed restrictions under hyperbar.Therefore just do not increase under the condition of volume of laser the increase that discharge volume can not be at double not increasing discharge length.In order further to increase power output, must increase injecting power.But, can not increase considerably the discharge injecting power because its discharge volume is little.The method that increases injecting power can be used non-self-maintained discharge instead, but these technology and structure are very complicated.Also can promptly increase discharge length to obtain power output at double with two laser series connection.This technical pattern is simple, but the laser volume will double.
Purpose of the present invention adopts the double anode system of band auxiliary electrode to enlarge discharge volume, guarantees stable discharging under hyperbar, increases injecting power, to reach the volume of be multiplied power output and don't increase laser.
The discharge system structure that adopts for achieving the above object as shown in Figure 1 and Figure 2.The flat segments that one of its feature is made up of two positive plates 4 forms discharge channel 1.Air-flow is flowed by this passage of horizontal process such as the direction of arrow.Every positive plate 4 all is made up of the anode strap 3 that is embedded in a plurality of apportions in the insulator.The cathode tube 5 of band water-cooled places the center of discharge channel and the upstream of close anode strap 3 (calculating by a gas flow direction) end.The auxiliary electrode 6 of a needle-like is all inserted in space between every anode strap 3 and the cathode tube 5.Every anode strap 3 is received the anode of DC power supply 8 again through inductance L by sub-resistance Ri and all-in resistance R.The negative terminal of DC power supply 8 and cathode tube 5 be ground connection all.To form the direct-current discharge loop.The zone of direct current glow discharge as shown in phantom in Figure 1.Above-mentioned anode strap 3, cathode tube and auxiliary electrode adopt the good copper product of conduction made usually.
Two of feature of the present invention is that every auxiliary electrode 6 inserts the low-pressure end of the pulse power 7 by dividing capacitor C i.Its high-pressure side is through capacitor C
1Be divided into two-way, one tunnel process all-in resistance R is connected with anode strap 3 with sub-resistance Ri, forms the pulsed discharge loop between auxiliary electrode 6 and the anode strap 3.Another road is again by a capacitor C
2Ground connection forms the pulsed discharge loop between auxiliary electrode 6 and the cathode tube 5.The pulsed discharge district that these two pulsed discharge loops form is shown in the chain-dotted line among Fig. 1.The electronics that is produced in this pulse auxiliary discharge district is blowed to by air-flow in the direct-current discharge district in downstream.Experimental results show that have auxiliary electrode respectively and positive plate and two pulsed discharge loop structures of cathode tube than the individual pulse discharge loop structure of having only between auxiliary electrode and the anode, it is big that injecting power is wanted.Therefore having two pulsed discharge loops is two of features of the present invention.
Two positive plates, cathode tube and two row's auxiliary electrodes size relationship each other be, the distance between two positive plates 4, and promptly the discharge channel size is wide is H=70～100mm.The cathode tube center is (H)/2 to the distance of every positive plate 4.The diameter of cathode tube 5 is d=Φ 6～Φ 10mm.Auxiliary electrode 6 is to the lateral separation f between the anode strap 3≤(H)/4, auxiliary electrode 6 to anode strap 3 termination longshore currents to (gas flow direction) apart from a=0～5mm.Cathode tube 5 edges to anode strap 3 termination longshore currents to distance b=0～5mm.Two speculums 2 of optical cavity place the two ends of discharge channel, and speculum center line and channel centerline coincidence.
Advantage of the present invention is owing to adopt a negative electrode to two anode discharges in both sides, then under same cathode and anode spacing condition, discharge channel doubles, and has therefore enlarged gas flow, increased discharge volume, can stable discharge under hyperbar, big discharging current.Increase considerably injecting power, also increased the output of stable continuous laser.Reach under the situation that does not increase the laser volume purpose of the laser power output that obtains to be multiplied.
Description of drawings is as follows:
Fig. 1 is the generalized section of discharge system.
Fig. 2 be among Fig. 1 A-A to view.
Embodiment: said structure is used to the CO that flows over
2In the laser, as Fig. 1, shown in 2, discharge channel size H=70mm wherein, cathode tube diameter d=Φ 8mm, between auxiliary electrode and the anode apart from F=15mm.Longshore current to two size a=2mm, b=2mm.Every anode has 75 of anode straps, its discharge length 150cm.
Adopt the arc chamber of the discharge system of the above structure as laser, place the closed circulation gas flow system, the laser of making has obtained the above laser output of myriawatt.The air velocity V=50M/s of laser, gas pressure P=10.6KPa, gas mixture are CO
2: H
2: He=1: 8.2: 9.8.Pulse power frequency 5KHz, pulsewidth 1 μ s, discharge voltage 2500V, discharging current 30A.12600 watts of laser peak power outputs, efficient 17%.10200 watts of consecutive mean power outputs, average efficiency 14.3%.Stream time was greater than 8 hours.Power instability ± 1.5%.
Claims (2)
1, a kind of discharge system for transverse flow gas laser, it is characterized in that constituting the discharge channel of flat segments by the positive plate that two insulators are embedded in the anode strap of apportion, it is the discharge channel of lateral flow that the cathode tube that has a water-cooled places this air-flow, be equipped with the auxiliary electrode of row's needle-like between cathode tube and the every positive plate, auxiliary electrode constitutes two pulsed discharge loops with cathode tube and positive plate respectively.
2, according to the described a kind of discharge system for transverse flow gas laser of claim 1, it is characterized in that the low-pressure end of every auxiliary electrode by the branch capacitor C i access pulse power, the high-pressure side of the pulse power is through capacitor C
1After, one tunnel process all-in resistance R is connected with anode strap with sub-resistance Ri, forms the pulse circuit between auxiliary electrode and the positive plate; Another road is by a capacitor C
2Ground connection, cathode tube is ground connection also, forms the pulsed discharge loop between auxiliary electrode and the cathode tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107550 CN1027023C (en) | 1991-12-07 | 1991-12-07 | Transverse flow gas laser discharge system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107550 CN1027023C (en) | 1991-12-07 | 1991-12-07 | Transverse flow gas laser discharge system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1073053A true CN1073053A (en) | 1993-06-09 |
| CN1027023C CN1027023C (en) | 1994-12-14 |
Family
ID=4908885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91107550 Expired - Fee Related CN1027023C (en) | 1991-12-07 | 1991-12-07 | Transverse flow gas laser discharge system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1027023C (en) |
-
1991
- 1991-12-07 CN CN 91107550 patent/CN1027023C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1027023C (en) | 1994-12-14 |
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