Views
3 years ago

Generator with Inductive Energy Storage for Laser Application

Generator with Inductive Energy Storage for Laser Application

Generator with Inductive Energy Storage for Laser

Pulsed Power Technology Generator with Inductive Energy Storage for Laser Application 1 A.N. Panchenko, A.E. Tel’minov, V.F. Tarasenko, and D.E. Genin Institute of High Current Electronics SB RAS, 2/3, Akademichesky ave., Tomsk, 634055, Russia Phone: 8(3822) 492-392, Fax: (3822) 491-410, E-mail: alexei@loi.hcei.tsc.ru Abstract – Generators with inductive energy storage (GIES) are developed for laser application. Discharge and laser parameters in high-pressure gas mixtures are studied. It was shown that the IES generator produces high-voltage pre-pulse and sharp increase of discharge current which allows to form long-lived stable discharge in different gas mixtures. Improve of both pulse duration and output energy was achieved for XeCl, XeF and KrF excimer lasers. Maximal at that date radiation power, output energy and laser pulse duration of N 2 laser were obtained. Efficient operation on CO 2 molecules with high peak power was demonstrated. Ultimate efficiency of HF(DF) non-chain lasers was achieved. 1. Introduction Development of efficient discharge lasers on different gas mixtures is associated with the solution of the following two problems. First problem consists in formation and sustaining of uniform volume discharge in halogen containing gas mixtures. Second one is improvement of the efficiency of a stored energy transfer from a pumping generator to this volume discharge plasma. Volume discharge is formed using different preionization sources (UV radiation, X-rays, electron beam and so on) and over-voltage applied to a laser gap. Comprehensive double discharge pumping circuits based on spark switches or saturable inductors are used for efficient energy transfer to the discharge plasma [1, 2]. In this circuits a high-voltage pre-pulse generator with low stored energy ignites volume discharge while a low-voltage storage deposits main part of pumping energy in the impedance matched mode. This pumping technique based on PFL allowed developing long-pulse XeCl discharge lasers with efficiency up to 4–5% [1]. However application of the double discharge circuits for lasers on gas mixtures with F 2 or NF 3 (XeF, KrF, and ArF and other lasers) was limited due to fast discharge collapse [2, 3]. Early we suggested alternative way of the prepulse formation using generators with IES for the prepulse formation [4–7]. In this generators part of energy stored in a primary capacitor is transferred into circuit inductor of the generator and than switched to the load using special device named opening switch. The present paper reports operation of the IESgenerators with semiconductor opening switch based on SOS-diodes on gas discharge load. Output laser parameters obtained with the generators are presented, as well. 2. IES generator design and measurement procedure Two laser devices were used in experiments. Their circuit diagram is shown in Fig. 1. Discharge crosssection and active length of lasers Nos. 1 and 2 with spark U V preionization were S = (0.5 – 2) 4 cm 2 and l = 72 and 90 cm, respectively. The discharge gap was d = 4 cm. The pumping generator consisted of storage C 0 = 38 or 70 (No. 1), 160 nF (No. 2) and peaking C 1 = 2.45 nF (No .1) or 3.3 nF (No. 2) capacitors. C 0 SW 0 I 0 I 0 I SOS L Dr D C Dr Fig. 1. Circuit diagram of the laser with IES generator: SW 0 , SW Dr – spark gaps; C 0 – storage capacitor; С 1 – peaking capacitors; С Dr – driving capacitor of SOS – diodes D; L 0 , L 1 , L Dr – circuit inductors, R d – discharge resistance, I i – currents in different circuits Semiconductor opening switch consists of 10 SOS-diodes placed in parallel with the peaking capacitors. Maximal opening current of the SOS diode was measured to be as high as 4 kA, the response time is 10–20 ns. To run the diodes as current interrupters, a current of 100–500 A was passed through each diode in the forward direction during 500 ns from a driving capacitor C Dr = 10 nF charged to the voltage U Dr = 10–35 kV and triggered by the spark gap SW Dr . Therewith the driving energy can be as low as 1 J. The generator of the laser can operate as conventional L C -circuit. In this case capacitor C Dr is not charged. Discharge and laser parameters were studied in gas mixtures of Ne, Xe, Kr with HCl, F 2 , NF 3 , N 2 with NF 3 or SF 6 , He–CO 2 –N 2 mixtures at total gas pressure up to 3.5 atm. Optical cavity was formed by totally reflecting Al mirror and dielectric mirrors with reflectivity 30–80% at = 222–10600 nm or uncoated quartz plate. C 1 I 1 L 1 R d SW Dr I d 1 The work was supported by the Federal Target Program “The scientific and scientific-pedagogical personnel of Innovative Russia”, State Contract No. 02.740.11.0444. 582

Laser Line, Micro Focus, Laser Pattern Generators
Energy Storage and Wind Power - United States Association of ...
Double-Fed Wound Rotor Induction Generator Flyer (PDF 193KB / 2 ...
High Energy Laser For Next Generation Ships - Weapon Systems ...
Application of Electromagnetic Induction - ASKnLearn
Solid-State High-Energy LASER WEAPONS
Second Generation Compressed Air Energy Storage The Technology ...
Lamp Pumped Lasers for PIV Applications from Litron - Photon Lines
Micronic Prexision Laser Pattern Generator
Lamp Pumped Lasers for PIV Applications from Litron
Wireless dimming control technology of induction lamp in energy ...
Applications of Fiber Lasers for Solar Cell ... - IPG Photonics
Wind Energy Systems for Electric Power Generation. Green
Reliable high-power red-emitting laser diodes - brighter.eu
LTM 530 Series Photodiode Laser Energy Monitors ... - Litron Lasers
LPY Series High Energy Pulsed Nd:YAG Lasers - UPC
Tm-fiber LASER PUMPED ACOUSTO-OPTICALLY ... - IPG Photonics
Power Generation Energy Efficient Design of Auxiliary Systems in ...
LPM 230 Series Photodiode Laser Energy Monitors ... - Litron Lasers
Application of Stirling Cycle Generators in Production ... - RMOTC
High-Pulse-Energy Ultrafast Laser for Spectroscopy & Micromachining
WEG- Application Book - Interempresas
Projected Costs of Generating Electricity - OECD Nuclear Energy ...
Distributed Generation in Industrial Facilities - Energy Efficiency
Switchgear selection and application guide Types ... - Siemens Energy
Power-to-Gas: Utility Scale Energy Storage - DOE Hydrogen and ...
Next-Generation Lasers for Advanced Active EO Systems - Raytheon
High Energy Compact Pulsed Lasers for Research ... - Photon Lines
Ultra High Energy Pulsed Q-switched Nd:YAG Lasers ... - Photon Lines