Maryam Restiwijaya
Program Studi Magister Ilmu Fisika, Universitas Diponegoro Semarang

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PENENTUAN SUDUT ARAH ANGIN ION PADA LUCUTAN KORONA POSITIF BERKONFIGURASI ELEKTRODA TITIK-BIDANG Sumariyah, Sumariyah; Restiwijaya, Maryam; Nur, Muhammad
YOUNGSTER PHYSICS JOURNAL Vol 6, No 4 (2017): Youngster Physics Journal Oktober 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Determination of the ion wind angle of positive corona discharge with point to plane electrode geometry configuration has been done. Point electrode was made from stainless steel with various radiuses of 0.26 mm, 0.28 mm, 0.35 mm, and 0.47 mm. The plane electrode with circle form was made from stainless steel with diameter of 20 cm. Determination of the ion wind angle was carried out by measuring the current, the radius of deformation of lubricating oil at various voltage, electrode spacing, and the radius of the point electrode. The results showed that the angle of the ion wind direction is affected by a given voltage, the distance between electrodes, and the radius of the point electrode. Value of the ion wind flow direction angle is inversely proportional to the distance between the electrode and the radius of the point electrode. When the voltage is increased, the angle of ion wind direction will be larger but would reach saturation at the region of corona discharge which is close to the arc discharge.Keywords: Ion wind, positive corona discharges, point to plane electrode.
ANALISIS PRODUKSI OZON DALAM REAKTOR DIELECTRIC BARRIER DISCHARGE PLASMA (DBDP): PENGARUH IMPEDANSI ELEKTRODA SPIRAL Restiwijaya, Maryam; Nur, Muhammad; Winarni, Tri A
BERKALA FISIKA 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014
Publisher : BERKALA FISIKA

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Abstract

Analysis of spiral-cylinder DBDP reactor on atmospheric pressure was done to explain spiral electrode impedance influence on ozone production. Variation of coil number (N): 10, 20, 30, 40, and 50 coil spiral applied to the spiral electrodes. Spiral electrode made of a copper wire with 0.4 mm in diameter and the inner and outer coils of each was 20 mm and 20.4 mm. Pyrex Tubing in diameter 3 cm and a thickness of 1 mm serves as a dielectric barrier cover spiral electrode. Cylindrical electrodes made from a copper plate with a length of 13.70 cm and thickness of 0.47 mm. a High voltage of AC has been used with a voltage up to 10 kV with frequency of 16 kHz. Free air supplied into the reactor with air flow rate of 6 L/minute. The results showed that at a constant N, ozone concentration decreased with the increasing value of the impedance (Z). Reactor DBDP most effective in terms of electricity consumption is on the DL = 20 mm, DK = 0.4 mm, and the number of coil N = 10 coils of wire with a power that is as high as 177.60 Watt and  Z=3,60x105?. Keywords : Number of coil, Spiral-cylinder electrodes, Ozone concentrations