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 Fundamental Characteristics of Dielectric Barrier Discharge (DBD) in bubble in water using Silicon Diode for Alternating Current (SIDAC)
Tác giả hoặc Nhóm tác giả: Hoa Thi Truong, Yoshihiko Uesugi, Yasunori Tanaka, Tatsuo Ishijima
Nơi đăng: plasma conference, Himeji 2017; Số: 23Gp-07;Từ->đến trang: 1-4;Năm: 2017
Lĩnh vực: Kỹ thuật; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
In this study, the basic characteristic of dielectric barrier discharge (DBD) plasmas in water were investigated as a sequence of a bubble formation and an electronic process within the bubbles. The DBD plasma has been generated directly in water by using a cylindrical electrode inside a quartz tube with a number of microsize holes submerged in water and an inexpensive circuit with a number of bilateral trigger device called Silicon Diode for Alternating Current (SIDAC) used for pulse generation. When applied voltage meets or exceeds breakover voltage of the series connecting SIDACs, these SIDACs will switch from a blocking state to a conducting state. Then, high voltage pulses with tens of kV derivation are created, as the bubble formed an electrical breakdown instantaneously takes place within the bubble. The experiments demonstrated that such configuration is capable of generating the stable and highly applicable DBD plasma in the field of water purification. However, the characteristic of such DBD plasma should be analyzed sufficiently when it is governed by two switches: the SIDACs and the dielectric layers and also governed by synchronization of the bubble formation time and switching time of SIDAC. In this study firstly the electrical characteristic of the DBD plasma was investigated, then the progress and reactivity of the DBD plasma in bubbles in water were observed by using an ICCD camera.
ABSTRACT
In this study, the basic characteristic of dielectric barrier discharge (DBD) plasmas in water were investigated as a sequence of a bubble formation and an electronic process within the bubbles. The DBD plasma has been generated directly in water by using a cylindrical electrode inside a quartz tube with a number of microsize holes submerged in water and an inexpensive circuit with a number of bilateral trigger device called Silicon Diode for Alternating Current (SIDAC) used for pulse generation. When applied voltage meets or exceeds breakover voltage of the series connecting SIDACs, these SIDACs will switch from a blocking state to a conducting state. Then, high voltage pulses with tens of kV derivation are created, as the bubble formed an electrical breakdown instantaneously takes place within the bubble. The experiments demonstrated that such configuration is capable of generating the stable and highly applicable DBD plasma in the field of water purification. However, the characteristic of such DBD plasma should be analyzed sufficiently when it is governed by two switches: the SIDACs and the dielectric layers and also governed by synchronization of the bubble formation time and switching time of SIDAC. In this study firstly the electrical characteristic of the DBD plasma was investigated, then the progress and reactivity of the DBD plasma in bubbles in water were observed by using an ICCD camera.
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