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Asep Yoyo Wardaya
Department Of Physics, Faculty Of Science And Mathematics, Diponegoro University, Jl. Prof. Soedharto, SH., Tembalang, Semarang 50275, Indonesia
Aerospace Engineering Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics

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Journal : BERKALA FISIKA

 1 
GENERATOR PEMBANGKIT PLASMA DENGAN KONFIGURASI ELEKTRODA BATANG TIPIS DAN JARUM Wardaya, Asep Yoyo; Nur, Muhammad
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 2 Tahun 2015
Publisher : BERKALA FISIKA

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Abstract

The application of plasma generator has been developed for everyday live because it can generate high electric field and induced current, even by only 12 volt of potential difference. The advantages of the plasma generator are mainly caused by configuration form of its electrodes which is usually very sharp and asymmetric form. In this paper, plasma generator has been discussed using electrodes configuration of the thin rod and needle in two dimensional planes. The result shows that the plasma generator can produce various high electric fields, which highest field at the tip of needle electrode. In case of configuration of needle electrode, it will be produced saturated current due to their asymmetric electrodes, while in case of thin rod electrode; it will be no saturated current due to symmetric electrode. Keywords: plasma generator, thin rod and needle configuration electrodes, electric field, saturated current.
THE ELECTRIC FIELD FORMULATIONS IN THE PLANE-KNIFE CONFIGURATIONS Yoyo Wardaya, Asep; Nur, Muhammad
BERKALA FISIKA Vol 14, No 2 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

In this paper, we calculate enormous electric field produced by the plane-knife configuration of the plasma generator. The value of electric field is calculated by two ways of configurations, the first is the almost perpendicular form of the Capasitor plates and second the perpendicular one. The result of calculation is the plates perpendicular form will produce higher electric fields than the almost perpendicular case. Key words : Plasma generator,  plane-knife configuration , electric field.
ANALISIS MEDAN LISTRIK PADA PLASMA KORONA DENGAN KONFIGURASI CINCIN BIDANG Wardaya, Asep Yoyo; Nur, Muhammad
BERKALA FISIKA Vol 13, No 4 (2010): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

It has been studied efectivity of the electric field and density of current that have been determined by the physical criteria from a long size of cylinder and a radius of thin ring from the corona plasma generator with the plane ring electrode. The result of the calculation is indicate that the strong electrics field will be resulted by the configurations of the thin ring form, contiguity apart between the thin rings (minimum cylinder length) and the size of the thin ring radius which near of the size of external cylinder radius. The radial symmetrical of geometric form of the thin ring is causing it has not current density form at tip of the thin ring.   Key words : Plasma,  plane-ring, electric field, density of current.
STUDI PRODUKSI RADIONUKLIDA MEDIS UNTUK GENERATOR 89Sr/90Y DARI HASIL REAKSI 89Rb(p,n)89Sr/90Y PADA SIKLOTRON MEDIK SECARA KOMPUTASI Hidayat, Yusup; Wardaya, Asep Yoyo; Triadyaksa, Pandji; Setiawati, Evi; Muhlisin, Zaenul; Sumariyah, Sumariyah; Suseno, Jatmiko Endro; Binu Soesanto, Qidir Maulana
BERKALA FISIKA Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019
Publisher : BERKALA FISIKA

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A computational calculation to determine production capacity of 90Y from the results of nuclearreactions 89Rb(p,n)89Sr/90Y from several medical cyclotrons has been carried out. Calculations were used to obtain the target thickness of 89Rb and maximum activity of 90Y on variable energy, time and irradiation currents. Calculations were also carried out to measure the impurity radionuclide activity during the reaction. The results activities of 90Y were obtained through modeling using the SRIM-2013 software and the TENDL-2017 application and calculated using MATLAB software. The results modeling and of calculations can predict the activity of 90Y and it can be used as an initial reference in the radionuclide production process using a cyclotron. The maximum activity of 90Y of 5409.80 mCi with a 10.54 mm-target thickness of 89Rb is generated from a cyclotron which has a 30 MeV proton beam with a 50 μA radiation current beam and 2 hours irradiation time. Using the same proton, current and irradiation time at irradiation energy of 8 MeV, 15 MeV and 22 MeV, the produced activity of 90Y was smaller, there are 552.28 mCi, 2100.39 mCi and 3644.31 mCi. The radioisotope of 90Y can be used in patients with a normal dose of 0.4 mCi / kg body weight, therefore in one production can supply the needs of 104 patients.Keywords: medical cyclotron, calculation and modeling, 90Y activity
ANALISIS FENOMENA ELEKTROHIDRODINAMIK PADA PERMUKAAN MINYAK MENGGUNAKAN PLASMA LUCUTAN KORONA DC POSITIF DENGAN KONFIGURASI ELEKTRODA GRADIENT OF LINE-TO-PLANE (GL-P) Nuraini, Desy; Wardaya, Asep Yoyo; Muhlisin, Zaenul
BERKALA FISIKA Vol 24, No 4 (2021): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Tujuan dari penelitian ini adalah untuk menganalisis pengaruh beberapa variasi yang dipakai terhadap kurva karakteristik serta persebaran angin ion pada fenomena elektrohidrodinamik. Elektroda aktif yang digunakan berukuran 2x4 cm, 3x6 cm, serta 4x8 cm. Penelitian ini dilakukan dengan variasi sudut ketajaman bentuk elektroda aktif () , , dan  dan variasi jarak antar elektroda () , ,  , dan . Hasil penelitian pada kurva I-V menunjukkan bahwa kuat arus bertambah sejalan dengan bertambahnya tegangan, serta pada analisis elektrohidrodinamik menyatakan bahwa pengaruh diameter lubang gumpalan minyak akan berubah jika variasi yang digunakan juga berubah. Penelitian dilakukan dengan elektroda aktif dengan bentuk, ukuran, sudut ketajaman serta jarak antar elektroda yang sama besar.
ANALISIS FENOMENA ELEKTROHIDRODINAMIK MENGGUNAKAN PLASMA LUCUTAN KORONA DC POSITIF DENGAN KONFIGURASI ELEKTRODA MATA PAHAT DAN TITIK TENGAH-BIDANG PADA MINYAK KELAPA SAWIT Charis Munajib; Asep Yoyo Wardaya; Zaenul Muhlisin; Isnain Gunadi
BERKALA FISIKA Vol 25, No 4 (2022): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Research  has  been  carried  out  on  the  analysis  of  I-V  characteristic  curves  and electrohydrodynamic phenomena using palm oil with a positive DC corona discharge generator with Chisel Eye and Mid-Field electrode configurations. This study aimed to obtain the effect of several  variations  used  on  the  characteristic  curve  and  distribution  of  ion  winds  on electrohydrodynamic phenomena. This research was conducted with 6 variations of the size of the dimensions of active electrodes and variations in the distance between the electrodes (c) 0.5 cm, 1 cm, 1.5 cm, and 2 cm. In the study of the I-V characteristic curve, the results show that with the increase in the applied voltage, the stronger the current produced will increase. At electrode D and a distance of 0.5 cm, the circuit is given a voltage of 5.32 kV produces a current of 10.5 A, whereas if the circuit is given a voltage of 6.34 kV it produces a current of 27.5 A. In the study of the analysis of electrohydrodynamic phenomena, it was found that if the variation used changed it would affect the diameter of the deformation of the palm oil in the form of a circle. At electrode D, at a distance of 0.5 cm with a voltage of 7.14 kV it produces a circular oil deformation diameter of  2.7  cm,  while  at  a  distance  of  1  cm  with  a  voltage  of  11.23  kV  produces  a  circular  oil deformation diameter of 5.5 cm.
Co-Authors Achmad Sjaifudin Tayibnapis Albar, Syarief Ali Khumaeni Ardianto, Kurniawan Betha Noranita Binu Soesanto, Qidir Maulana Bobby Eka Gunara Charis Munajib Chorirul Anam Darliawati, Herli Dhyan Prastiwi Dwi Purwantoro Sasongko Eko Adi Sarwoko Elshaarani, Tarig Evi Setiawati Fajar Arianto Frangki Leko Freddy Permana Zen Gani Gunawan Hadiyanto Hadiyanto Hartuti Purnaweni Heri Sugito Herli Darliawati Irfan Ali, Irfan Isnain Gunadi Jaka Windarta Jatmiko Endro Suseno Jauhar Fahmi Jusak Sali Kosasih Kiichiro Kagawa M.Pd S.T. S.Pd. I Gde Wawan Sudatha . Muhammad Nur Muhammad Nur Muhammad Nur Nasrullah Idris Nur, Muhammad Nuraini, Desy Pandji Triadyaksa Prastiwi, Dhyan Ratna Wulan Sutanti Rita Rahmawati Robertus Heri Sulistyo Utomo Septian Adhi Nugroho Sumariyah Sumariyah Susilo Hadi Susilo Hadi, Susilo Tayibnapis, Achmad Sjaifudin Triyanta Triyanta Wahyu Setia Budi Windarta, Jaka Yusup Hidayat Zaenul Muhlisin