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Systematic studies and optimization of super sensitivity gaseous detectors of sparks, open flames and smoke [article]

Marcello Abbrescia, Giacinto De Cataldo, Antonio di Mauro, Paolo Martinengo, Cosimo Pastore, Vladimir Peskov, Francesco Pietropaolo, Giacomo Volpe, Igor Rodionov
2020 arXiv   pre-print
A review of the current progress in developments and tests of supersensitive gaseous detectors of open flame, sparks and smoke is given.  ...  This design, after further modification, will allow building not only a high efficiency detector but also offers UV imaging capability for flame visualization and several other applications.  ...  Acknowledgements These studies were performed in the framework of the ATTRACT-SMART project. For the technical support we thank M. Meli, J. Ven Belleviin and M. Van Stenis.  ... 
arXiv:2003.06941v1 fatcat:qwzilrgpybcabdhzauqm5llaey

Progress in the development of a S-RETGEM-based detector for an early forest fire warning system

G Charpak, P Benaben, P Breuil, P Martinengo, E Nappi, V Peskov
2009 Journal of Instrumentation  
Tests show that it is one hundred times more sensitive than the best commercial ultraviolet flame detectors and therefore, it is able to reliably detect a flame of 1.5x1.5x1.5 m3 at a distance of about  ...  In this paper we present a prototype of a Strip Resistive Thick GEM photosensitive gaseous detector filled with Ne and ethylferrocene vapours at a total pressure of 1 atm for an early forest fire detection  ...  Its primary focus is the operation of the S-RETGEM, which allows for constructing a simple, rather inexpensive and robust detector featuring imaging capability, which, used in conjunction with other methods  ... 
doi:10.1088/1748-0221/4/12/p12007 fatcat:wxw46nwd5vdb3puhf5hzvkxse4

Gallium Nitride Photodetector Measurements of UV Emission from a Gaseous CH4/O2 Hybrid Rocket Igniter Plume [article]

Hannah S. Alpert, Ananth Saran Yalamarthy, Peter F. Satterthwaite, Elizabeth Jens, Jason Rabinovitch, Noah Scandrette, A.K.M. Newaz, Ashley C. Karp, Debbie G. Senesky
2019 arXiv   pre-print
These data demonstrate the functionality of GaN as a material platform for use in harsh environment flame monitoring.  ...  In this paper, we use a GaN photodetector to measure ultraviolet (UV) emissions from a hybrid rocket motor igniter plume.  ...  ACKNOWLEDGEMENTS The Jet Propulsion Laboratory, California Institute of Technology, provided funding and testing for this research under a contract with the National Aeronautics and Space Administration  ... 
arXiv:1902.02446v1 fatcat:nc3cdsw2rngddffprdcrzuvktm

Flame growth and wrinkling in a turbulent flow

C.F. Kaminski, X.S. Bai, J. Hult, A. Dreizler, S. Lindenmaier, L. Fuchs
2000 Applied physics B  
For the first time it has thus become possible to observe the influence of fluid motion or reaction chemistry on flame structure in a direct, time resolved, fashion.  ...  "High repetition rate planar laser induced fluorescence of OH in a turbulent non-premixed flame" "Characterization of a spark ignition system by planar laser-induced fluorescence of OH at high repetition  ...  It is a result of joint efforts from many individuals, I particularly want to express my appreciation to: -Clemens Kaminski, for being an excellent supervisor and friend, without  ... 
doi:10.1007/s003400000425 fatcat:3g2dav6hg5gtfpd3lkgf4ebdwe

Casting of Hypoid Gear & Process Cost Reduction

Akash Bharadwaj
2017 International Journal Of Mechanical Engineering And Information Technology  
My purpose for this project elimination of Hobbing or Milling operation use for gear teeth cutting & saving the manufacturing cost of some process.  ...  This is the project that implementation of Casting of Hypoid Gear in Gear Plant at Spicer India Pvt ltd.  ...  Instrumentation: A simple flame photometer consists of burner, nebulizer, monochromator, detector and recorder.  ... 
doi:10.18535/ijmeit/v5i4.04 fatcat:m2yoxephcjdbxci4y7w34ffe4m

Methods of Experimental Physics

L. Marton, Immanuel Estermann, Sanborn C. Brown
1960 Physics today  
The flame is a complicated phenomenon; interest in its regime has revived since it has become possible to use laser light for probing.  ...  Considerable progress was made in the mid-nineteenth century in the study of flame and spark emission spectra and absorption spectra by J. F. W. Herschel, W. H. F. Talbot, C . Wheatstone, W.  ... 
doi:10.1063/1.3056961 fatcat:qiff2bemfrdkzgy3vtiye3yyvi

Sir Alan Walsh. 19 December 1916 -- 3 August 1998: Elected F.R.S. 1969

P. Hannaford
2000 Biographical Memoirs of Fellows of the Royal Society  
Alan and Walter had been seeking support for the commercialization of some of the atomic absorption research originating in Alan's laboratory, such as the resonance detector (18), but this had been rejected  ...  Later, Alan and a colleague, Peter Larkins, developed the separated (nitrogen-sheathed) flame as a versatile resonance detector for the isolation of atomic resonance lines (27, 29) .  ...  Alan Trumble, a close friend and neighbour of Audrey and Alan's, commented in a eulogy to Alan: Alan loved life and people, always showing a very genuine interest in others' activities and concerns for  ... 
doi:10.1098/rsbm.1999.0100 fatcat:mlx5j6ep6nad7orak2l73cthbq

Property measurement utilizing atomic/molecular filter-based diagnostics

M. Boguszko, G.S. Elliott
2005 Progress in Aerospace Sciences  
A variety of atomic/molecular filter diagnostic techniques have been under development for qualitative and quantitative flow diagnostic tools since their introduction in the early 1990s.  ...  The light transmitted through the filter is then focused on a detector, typically a CCD camera or photomultiplier tube.  ...  In addition we would like to thank the many researchers and publishers who gave us permission to reproduce their figures.  ... 
doi:10.1016/j.paerosci.2005.03.001 fatcat:ytbekqbvy5fkfnemkb6hzbhswq

Broadband Laser-Based Infrared Detector for Gas Chromatography

Teemu Tomberg, Niko Vuorio, Tuomas Hieta, Matti Jussila, Kari Hartonen, Markku Vainio, Tommi Mikkonen, Juha Toivonen, Marja-Liisa Riekkola, Lauri Halonen, Markus Metsälä
2020 Analytical Chemistry  
The combination of photoacoustic spectroscopy and gas chromatography offers a viable solution for compact and portable instruments in applications that require straightforward analyses with no consumables  ...  Cantilever-enhanced photoacoustic spectroscopy coupled with gas chromatography is used to quantitatively analyze a mixture of alcohols in a quasi-online manner.  ...  Capillary GC, commonly coupled with detectors, such as flame ionization detectors (FIDs) or mass spectrometers (MSs), is a mature and highly reliable method for laboratory analyses of volatile organic  ... 
doi:10.1021/acs.analchem.0c02887 pmid:33081464 pmcid:PMC7660589 fatcat:nm4fecsgqbas3ii2ownfxzokdq

Infrared polarization spectroscopy of CO2 at atmospheric pressure

Z.T. Alwahabi, Z.S. Li, J. Zetterberg, M. Aldén
2004 Optics Communications  
Finally, use of the technique in a lean and partially premixed methane/air flame in a co-axial jet flame burner was demonstrated. v List of papers I.  ...  A sharp and thin CH layer was visible from Φ = 0.6 to Φ = 1.5 in methane/air flames.  ...  Detectors The importance of using the appropriate detector for a given measurement cannot be exaggerated. Today, many different detectors are available, both point and twodimensional detectors.  ... 
doi:10.1016/j.optcom.2004.01.012 fatcat:hihmsvel6fem7egvs5tdjx6xq4

Tests of urban bus specific emissions in terms of currently applicable heavy vehicles operating emission regulations

2017 Combustion Engines  
The article presents a study of a city bus in real operating conditions (RDE) from the perspective of the latest regulations for the assessment of specific emissions compliance for heavy-duty vehicles  ...  The object of the research was a serial configuration hybrid drive vehicle. Measurements were made in the real driving conditions in Poznan agglomeration.  ...  Acknowledgements The research was funded by the National Centre for Research and Development (Narodowe Centrum Badań i Rozwoju) -research project within the Applied Research Programme (contract No.  ... 
doi:10.19206/ce-2017-103 fatcat:nfbtyagdfzazzb3gdmaifoynta

Laser diagnostics and minor species detection in combustion using resonant four-wave mixing

Johannes Kiefer, Paul Ewart
2011 Progress in Energy and Combustion Science  
The importance of minor species such as reaction intermediates is outlined together with the challenges they present for detection and measurement in the hostile environments of flames, technical combustors  ...  Laser-based methods have transformed combustion diagnostics in the past few decades.  ...  In particular, we would like to thank the anonymous referees of the present article who provided many helpful comments and thereby contributed to the final manuscript.  ... 
doi:10.1016/j.pecs.2010.11.001 fatcat:jvvdoezwnfdg7lj3un5i5vnjtq

A chemical kinetic study of the reaction of hydroxyl with furans

A. Elwardany, Et. Es-sebbar, F. Khaled, A. Farooq
2016 Fuel  
The OH radicals were monitored using the well-characterized R 1 (5) rotational line of the A-X (0, 0) band in the ultraviolet region near 306 nm.  ...  In this work, rate coefficients for the reaction of hydroxyl (OH) with furan (k 1 ), 2-methyl furan (k 2 ) and 2,5-dimethyl furan (k 3 ) were measured behind reflected shock waves over a temperature range  ...  Acknowledgement Research reported in this paper is funded by King Abdullah University of Science and Technology (KAUST).  ... 
doi:10.1016/j.fuel.2015.10.098 fatcat:leimnf34a5en3jyispatumptca

Polarization Correlation of Photons Emitted in an Atomic Cascade

Carl A. Kocher, Eugene D. Commins
1967 Physical Review Letters  
blackened with soot deposited from a propane flame.  ...  Probably most of it should be attributed to an inaccuracy in the Bates-Damgaard method, although the possibility remains that the detector efficiencies T} are in error.  ... 
doi:10.1103/physrevlett.18.575 fatcat:2z5hx3z77zh45avz3wfyct5kry

Comparison of UV images and Measurement of the Corona Discharge from Insulators using the UV Sensor
UV 센서를 이용한 절연애자의 코로나 방전 측정 및 자외선 이미지의 비교

Young-Seok Kim, Myeong-Il Choi, Chong-Min Kim, Sun-Bae Bang, Kil-Mok Shong
2011 The Transactions of The Korean Institute of Electrical Engineers  
Inspections and diagnoses of corona discharge are important in order to prevent electrical faults of external insulation in power systems.  ...  The UV sensor estimated that DC voltage needed to be set at 700V for accurate data analysis of the properties of UV detected during corona discharge.  ...  Popovic, "A Method For Spark Rejection in Ultraviolet Flame 1975년 5월 30일생, 2002년 2월 창원대학 교 전기공학과 졸업. 2004년 2월 동대학 원 전기공학과 졸업(석사). 2003년~현재 한국전기안전공사 전기안전연구원 주임 연구원. 1972년 7월 18일생, 1998년 전북대학교 전기공학과 졸업.  ... 
doi:10.5370/kiee.2011.60.4.899 fatcat:4v7qprufrved5l7fushaijtw4y
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