TY - JOUR
T1 - Neon excimer emission from pulsed high-pressure microhollow cathode discharge plasmas
AU - Kurunczi, P.
AU - Martus, K. E.
AU - Becker, K.
N1 - Funding Information:
This work was supported by the NSF and by the DARPA/ARO. We also acknowledge support from the ARO through a DURIP award.
PY - 2003/1/15
Y1 - 2003/1/15
N2 - Microhollow cathode discharge (MHCD) plasmas in high-pressure Ne (up to and exceeding atmospheric pressure) are known to be efficient sources of Ne2* excimer radiation in the vacuum ultraviolet spectral region between 75 and 90 nm. By operating the MHCD plasma in a pulsed direct current (dc) mode, we were able to increase the Ne2* excimer emission by up to 1 order of magnitude compared to the emission intensity obtained from the same MHCD plasma excited by a constant dc current. Time-resolved emission spectroscopic studies of the Ne2* excimer emission following pulsed dc excitation of an MHCD plasma in high-pressure Ne were carried out to elucidate the microscopic details of the excimer formation and destruction processes. Our studies provide direct evidence that quenching of the Ne2*(3Σu) excimer molecules and other loss processes of the excimer molecules are important processes in high-pressure MHCD plasmas and represent, in fact, the dominant destruction channel of the Ne2*(3Σu) excimer molecules in the MHCD plasma under a wide range of operating conditions.
AB - Microhollow cathode discharge (MHCD) plasmas in high-pressure Ne (up to and exceeding atmospheric pressure) are known to be efficient sources of Ne2* excimer radiation in the vacuum ultraviolet spectral region between 75 and 90 nm. By operating the MHCD plasma in a pulsed direct current (dc) mode, we were able to increase the Ne2* excimer emission by up to 1 order of magnitude compared to the emission intensity obtained from the same MHCD plasma excited by a constant dc current. Time-resolved emission spectroscopic studies of the Ne2* excimer emission following pulsed dc excitation of an MHCD plasma in high-pressure Ne were carried out to elucidate the microscopic details of the excimer formation and destruction processes. Our studies provide direct evidence that quenching of the Ne2*(3Σu) excimer molecules and other loss processes of the excimer molecules are important processes in high-pressure MHCD plasmas and represent, in fact, the dominant destruction channel of the Ne2*(3Σu) excimer molecules in the MHCD plasma under a wide range of operating conditions.
KW - Excimers
KW - High-pressure plasmas
KW - Hollow cathode discharges
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U2 - 10.1016/S1387-3806(02)00778-9
DO - 10.1016/S1387-3806(02)00778-9
M3 - Article
AN - SCOPUS:0037437570
VL - 223-224
SP - 37
EP - 43
JO - International Journal of Mass Spectrometry and Ion Processes
JF - International Journal of Mass Spectrometry and Ion Processes
SN - 1387-3806
ER -