Bulletin of the American Physical Society
76th Annual Gaseous Electronics Conference
Volume 68, Number 9
Monday–Friday, October 9–13, 2023; Michigan League, Ann Arbor, Michigan
Session IT4: Poster Session I; Exhibition & Coffee (4:00pm-6:00pm)
4:00 PM,
Tuesday, October 10, 2023
Room: Michigan League, Ballroom
Abstract: IT4.00058 : Characterization and Efficacy Analysis of a Dielectric barrier discharge based Far UV-C 222 nm Excimer light Source*
Presenter:
Kiran Ahlawat
(Indian Institute of Technology, Jodhpur)
Authors:
Kiran Ahlawat
(Indian Institute of Technology, Jodhpur)
Ramavtar Jangra
(Indian Institute of Technology Jodhpur)
Ram Prakash
(Indian Institute of Technology, Jodhpur)
In this work, a co-axial dielectric barrier discharge (DBD) plasma based Far UV-C excimer light source has been characterized for the maximum absolute intensity by varying the different parameters such as gas pressure, applied voltage and frequency. A mixture of krypton with a very small fraction of chlorine gas has been used in the gas gap and pinched-off for bacterial inactivation efficiency analysis. When the high voltage was supplied to the DBD excimer source, then the excitation and ionization of both the gases (Kr and Cl 2 ) takes place. The cations of krypton and anions of chlorine gas get involved in a three-body recombination reaction with an atom or molecule of buffer gas (M) and form the excited complex (KrCl*) which decomposes rapidly and emits photons having wavelength of 222 nm. For the absolute intensity measurement, a photodetector has been used. A PMT based monochromator has been used for spectroscopic analysis. A very narrow band (FWHM ~ 1.7 nm) peaking at 222 nm has been obtained. Ultimately, the developed source has been tested for its bacterial efficiency on gram positive bacteria and a 7 log reduction has been achieved within 30 sec of Far UV-C treatment having an UV dose of ~300 µJ/cm 2 .
*The author would like to acknowledge Science and Engineering Research Board for the funding under project no. CRG/2020/005369.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700