title: Signal quality improvement using cylindrical confinement for laser induced breakdown spectroscopy.
abstract: In our previous work, we found that there was great potential to improve the pulse-to-pulse signal repeatability using a moderate cylindrical cavity confinement. However, the improvement was achieved only with certain experimental parameters; while under other conditions, there was no improvement or even worse repeatability. In the present work, the experimental configuration was redesigned and unexpected uncertainty from the variation of the laser and cavity alignment and the laser ablated aerosols were avoided. With these two improvements, we demonstrated that the cavity can always increase the signal repeatability. In addition, image taken by ICCD verified that the confinement improved the stability of the plasma morphology as expected.
authors.affiliation: 1State Key Lab of Power Systems, Department of Thermal Engineering, Tsinghua-BP Clean Energy Center, Tsinghua University, Beijing, 100084, China.
authors.forename: Zongyu
authors.initials: Z
authors.lastname: Hou
authors.forename: Zhe
authors.initials: Z
authors.lastname: Wang
authors.forename: Jianmin
authors.initials: J
authors.lastname: Liu
authors.forename: Weidou
authors.initials: W
authors.lastname: Ni
authors.forename: Zheng
authors.initials: Z
authors.lastname: Li