Chemical oxygen-iodine laser using a new method of atomic iodine generation

Špalek, Otomar; Čenský, Miroslav; Jirásek, Vı́t; Kodymová, Jarmila; Jakubec, Ivo; Hager, Gordon D.

doi:10.1109/jqe.2004.826451

Cited by 13 publications

(5 citation statements)

References 16 publications

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“…26,27 A chemical generation of atomic iodine from gaseous reactants directly in the COIL has been proposed in Prague COIL Laboratory. 30,31 Principle of this advanced method pivots on a set of sequential chemical reactions generating initially the intermediate species, atomic chlorine or atomic fluorine, which then react fast with hydrogen iodide to atomic iodine. The Cl atoms are produced in the reaction of gaseous chlorine dioxide with nitrogen oxide, and the F atoms in the reaction of molecular fluorine with nitrogen oxide.…”

Section: Advanced Alternative Methods Of Atomic Iodine Generationmentioning

confidence: 99%

“…10 shows an example of the recorded gain distribution across the gain region during chemical generation of atomic iodine for the case of insufficient mixing (penetration) of reactants. 31 Another advanced diagnostics developed at PSI Inc. makes possible to determinate the singlet oxygen concentration from simultaneous recording the emission spectra of O 2 ( 1 ∆) and I * , and I * concentration by ISD. 39 The example of such measurements is shown in Fig.…”

Section: Advanced Diagnostics For Coilmentioning

confidence: 99%

“…Scheme of reactant injections for chemical generation of I atoms in COIL, and cavity cross section 31. …”

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confidence: 99%

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COIL--Chemical Oxygen Iodine Laser: advances in development and applications

Kodymová

2005

SPIE Proceedings

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Advantageous features of Chemical Oxygen-Iodine Laser (COIL) for laser technologies have increased considerably activities of international COIL communities during past ten years. They have been focused on the advanced concepts of hardware designs of the COIL subsystems, and testing and scaling-up of existing laser facilities. Prospective special applications of COIL technology, both civil and military, have received a significant attention and gained concrete aims. The paper is introduced by a brief description of the COIL operation mechanism and key device subsystems. It deals then with presentation of some investigated advanced concepts of singlet oxygen generators, alternative methods for atomic iodine generation, a mixing and ejector nozzle design to downsize a pressure recovery system, and optical resonators for high power COIL systems. The advanced diagnostics and computational modeling are also mentioned as very useful tools for critical insight into the laser kinetics and fluid dynamics, supporting thus the COIL research. The recent progress in the COIL development moves this laser closer to the application projects that are also briefly presented.

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Section: Advanced Alternative Methods Of Atomic Iodine Generationmentioning

confidence: 99%

Section: Advanced Diagnostics For Coilmentioning

confidence: 99%

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COIL--Chemical Oxygen Iodine Laser: advances in development and applications

Kodymová

2005

SPIE Proceedings

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“…The operation of COIL or DOIL imposes the following main requirements on the atomic iodine generator: (1) a high yield of atomic iodine, (2) a low temperature, (3) a sufficiently high pressure to inject produced iodine into the laser cavity and (4) a low quenching rate of O 2 ( 1 ∆ g ) and I( 2 P 1/2 ) by reactants and reaction products. Two methods of atomic iodine for COIL/DOIL were investigated till now, a chemical way [2][3][4][5] and electric discharge way [6][7][8][9][10][11][12][13][14][15][16][17] (plasma-chemical way). *schmiedb@fzu.cz; phone +420-266052629; fax +420-286890265; www.fzu.cz The chemical way of atomic iodine generation for COIL was suggested and theoretically and experimentally tested in our laboratory.…”

Section: Introductionmentioning

confidence: 99%

“…*schmiedb@fzu.cz; phone +420-266052629; fax +420-286890265; www.fzu.cz The chemical way of atomic iodine generation for COIL was suggested and theoretically and experimentally tested in our laboratory. [2][3][4][5] The chemical methods produce sufficient concentrations of I atoms. However, they suffer from chemicals seriously quenching O 2 ( 1 ∆ g ) or from very high reaction temperature.…”

Section: Introductionmentioning

confidence: 99%

RF discharge generation of I atoms in CH 3 I and CF 3 I for COIL/DOIL

et al. 2008

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A cw/pulsed radiofrequency discharge coupled by electrodes in coaxial arrangement was used to dissociate iodine atoms from CH 3 I or CF 3 I molecules diluted in a carrier gas (a mixture of Ar and He). The discharge chamber was arranged directly inside an iodine injector (made of aluminum) to minimize the recombination of generated atomic iodine and enabling an increased assistance of UV light for a photo-dissociation enhancement of I atoms production. The effluent of the discharge chamber/iodine injector was injected into the flow of N 2 downstream the nozzle throat. Measurements of I atoms concentration distribution at different distances from the injection and in two directions across cavity were done by means of absorption measurements at the wavelength of 1315 nm. Dependences of atomic iodine concentration on main RF discharge parameters and flow mixing conditions were measured. This novel method could be an alternative to the chemical generation of atomic iodine and also an efficient alternative to other electric discharge methods of I atoms generation for chemical oxygen-iodine laser (COIL) and discharge oxygen-iodine laser (DOIL).

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3.7 Iodine lasers

Rohlena

Beránek

Laser Systems, Part 1

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Chemical oxygen-iodine laser using a new method of atomic iodine generation

Cited by 13 publications

References 16 publications

COIL--Chemical Oxygen Iodine Laser: advances in development and applications

COIL--Chemical Oxygen Iodine Laser: advances in development and applications

RF discharge generation of I atoms in CH 3 I and CF 3 I for COIL/DOIL

3.7 Iodine lasers

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