Optical spectroscopic based in-line iodine flow measurement system – an application to COIL

Mainuddin,; Beg, Mirza Tariq; Moinuddin, Mohammed; Tyagi, Rakesh K.; Rajesh, R.; Singhal, Gaurav; Dawar, A. L.

doi:10.1016/j.snb.2005.01.004

Cited by 21 publications

(8 citation statements)

References 4 publications

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“…' v ' is the absorption cross section, 'l' is length of optical cell, 'k' is the Boltzmann constant, 'T' is the temperature of the gas, 'P tot ' is the measured total pressure, 'M c ' is carrier/buffer gas molar flow rate. This concept has been detailed in earlier paper [11].…”

Section: B Optical Absorption Techniquementioning

confidence: 99%

“…Thus various parameters viz. specie concentration [11][12][13] of the lasing, pumping mediums and other by-products, medium homogeneity [14], individual constituent gas flow rate, pressure and temperature at critical locations and cavity Mach number are very crucial in determining the output of the gas laser system. It is essential to determine these parameters nonintrusively, with necessary precision to be able to optimize these lasers especially in case of large-scale systems.…”

Section: Introductionmentioning

confidence: 99%

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Overview of Optical Techniques for Characterization of High-Power Infrared Gas Lasers

et al. 2015

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High power lasers typically form a multidisciplinary technological area laced with innumerable challenges in its realization as a practical system. The prime amongst them are infrared gas laser sources such as Carbon-di-Oxide Gas Dynamic Laser, Hydrogen Fluoride, Deuterium Fluoride Laser and Chemical Oxygen Iodine Laser etc. Each of these laser systems is associated with a unique as well as complex active medium environment involving intense interaction between lasing and pumping species under specific gas dynamic conditions. The parameters viz. specie concentration of the lasing, pumping mediums and other by-products, medium homogeneity, individual constituent gas flow rate, pressure and temperature at critical locations and cavity Mach number are very crucial in determining the output of the gas laser system. It is essential to determine these parameters non-intrusively, with necessary precision so as to optimize these lasers especially in case of largescale systems. Thus, the focus of this paper is to review and discuss the existing applicable optical detection methodologies ranging from the more established methods such as optical absorption/emission spectroscopy to very contemporary like Raman spectroscopy, cavity ring down spectroscopy, laser induced fluorescence/ planer laser induced fluorescence etc., which are relevant for the diagnostic needs of gas lasers.

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Section: B Optical Absorption Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Overview of Optical Techniques for Characterization of High-Power Infrared Gas Lasers

et al. 2015

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“…The chlorine remainder makes the ventury meter cannot be used in measurement of IFR. The simple method of absorption spectroscopy from Mainuddin et al always obtain inaccurate IFR results [5] because of the scattering of aerosol. The complicated ingredients make these traditional methods monitor IFR difficultly.…”

Section: Introductionmentioning

confidence: 99%

Iodine flow rate measurement for COIL with the chemical iodine generator based on absorption spectroscopy

Zhao

Zhang

et al. 2015

SPIE Proceedings

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A dual-components absorption method based on absorption spectroscopy was described in the paper. It can easily eliminate the influence of the serious contamination and aerosol scattering on IFR measurement by utilizing the absorptions of iodine vapor and chlorine on two different wavelengths respectively. According to the character that there is no other gaseous product in the reaction besides iodine vapor, IFR in real time can be obtained by the connections of the pressure and the flow rate among chlorine remainder, iodine vapor, and the buffer gas. We used this method to measure IFR for the first time at the exit of a chemical iodine generator. The average of IFR is coincident with that calculated by chemical weighting mass.iodine flow rate, COIL, chemical iodine generator, absorption spectroscopy

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“…But the corrosiveness of iodine makes this method failed in some cases because the constricted throat is blocked. A simple system was recently described by Mainuddin et al [3] and demonstrated in an operating COIL flow. Filtered light (490 ± 5 nm) from tungsten halogen lamp was passed through the gas sample and focused onto a silicon detector and the iodine concentration was determined from the amount of light absorbed by the sample according to the Beer Lambert's law.…”

Section: Introductionmentioning

confidence: 99%

“…In order to solve the above problems, the system utilizes two wavelengths (e.g. 365 nm and 470 nm) to distinguish between iodine [3,4,5] vapor absorption and other optical losses (e.g. contamination).…”

Section: Introductionmentioning

confidence: 99%

A real-time on-line measurement of iodine flow rate based on absorption spectroscopy

Li¹,

Yu²,

Duo³

et al. 2009

Sensors and Actuators B: Chemical

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Optical spectroscopic based in-line iodine flow measurement system – an application to COIL

Cited by 21 publications

References 4 publications

Overview of Optical Techniques for Characterization of High-Power Infrared Gas Lasers

Overview of Optical Techniques for Characterization of High-Power Infrared Gas Lasers

Iodine flow rate measurement for COIL with the chemical iodine generator based on absorption spectroscopy

A real-time on-line measurement of iodine flow rate based on absorption spectroscopy

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