Axial Magnetic Field Effects on Xenon Short-Arc Lamps

WANG Cheng (王城); CHEN Tang (陈瑭); LI Wanwan (李皖皖); ZHA Jun (査俊); XIA Weidong (夏维东)

doi:10.1088/1009-0630/16/12/03

Plasma Science and Technology > 2014 > 16(12): 1096-1099. > DOI: 10.1088/1009-0630/16/12/03

WANG Cheng (王城), CHEN Tang (陈瑭), LI Wanwan (李皖皖), ZHA Jun (査俊), XIA Weidong (夏维东). Axial Magnetic Field Effects on Xenon Short-Arc Lamps[J]. Plasma Science and Technology, 2014, 16(12): 1096-1099. DOI: 10.1088/1009-0630/16/12/03

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Axial Magnetic Field Effects on Xenon Short-Arc Lamps

Department of Thermal Science and Energy Engineering, University of Science and Technology, Hefei 230027, China

Funds: supported by National Natural Science Foundation of China (Nos. 50876101, 11035005 ) and the Science Instrument Foundation of CAS

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Received Date: December 15, 2013

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Abstract

Abstract

The effect of an axial magnetic field (AMF) on an old xenon short-arc lamp is experimentally investigated in this work. As the AMF increases up to 18 mT, the visible radiation power and electric power ascend more than 80% and 70% respectively, and the radiation efficiency is improved by 23% for the best increment at 12 mT AMF. The measurement of radiation intensity shows that the increment of radiation intensity comes mostly from the plasma area close to the cathode tip, and partially from the other area of the arc column. Successive images of the arc indicate that the arc column not only rotates about its axis, but revolves around the axis of electrodes with the AMF. The arc column structure is constricted, distorted and elongated as the AMF increases. It is suggested that the improvements of the radiation intensity and radiation efficiency are attributed to the constriction of the arc column, which is mainly induced by the enhanced cathode jet.
- xenon lamp,
- axial magnetic field (AMF),
- radiation intensity,
- cathode jet

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References (17)

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