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All Journal Indonesian Journal of Electronics and Instrumentation Systems International Journal of Science and Engineering (IJSE) BERKALA FISIKA Jurnal Ilmiah Aplikasi Isotop Radiasi YOUNGSTER PHYSICS JOURNAL Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Ilmiah Arena Tekstil Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Journal of Physics and Its Applications Jurnal ULTIMA Computing Indonesian Journal of Electrical Engineering and Computer Science Journal of Energy, Material, and Instrumentation Technology
Zaenul Muhlisin
BDepartment Of Physics, Faculty Of Sciences And Mathematics, Diponegoro University, Semarang
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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APLIKASI PLASMA LUCUTAN BERPENGHALANG DIELEKTRIK PADA PENGOLAHAN AIR SUMUR : PENGARUH TERHADAP pH, KESADAHAN, DAN TOTAL COLIFORM Rizky Maylia; Muhammad Nur; Zaenul Muhlisin
Youngster Physics Journal Vol 3, No 1 (2014): Youngster Physics Journal Januari 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Has conducted research on dielectric barrier discharge plasma applications configured with spiral – chylindrical electrodes to generate ozone free air source. Purpose of this study was to determine the effect of ozone dissolved in water quality through pH, hardness ( CaCO3 ), and total coliform in the waterin the eastern part of the village Gemah.             Electrodes used in this study has a diameter of 3 cm and a length of 15cm. Plasma generation using AC voltage with a voltage of 7 kV. Air flow velocity used 5,5 L/min with a volume of water that will be treated with ozone as much as 1 liter. Dissolved ozone free air is obtained by incorporating into the DBD reactor, out of the reactor, ozone is formed, and flowed into the water. Dissolved ozone concentration were determined by varying the time and use a constant voltage.            The result showed the concentration of dissolved ozone diminishing increments. pH values tend to be fixed and not affected by ozone treatment of water. Water hardness value decreased slightly and the number of total coliform as a whole are likely to remain. Keywords :electrode spiral-cylindrical, dielectric barrier discharge, dissolved ozone concentrate, CaCO3, total coliform, pH.
STUDI PENGARUH UKURAN PIXEL IMAGING PLATE TERHADAP KUALITAS CITRA RADIOGRAF Ahmad Sudin; Hendri Widyandari; Zaenul Muhlisin
Youngster Physics Journal Vol 4, No 3 (2015): Youngster Physics Journal Juli 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

This study aims to determine the image on each imaging plate which has a different pixel sizes. This research is using a plane X-ray, Computed Radiography (CR) which is used in the diagnostic field. This study uses three imaging plate each having size of 0.097 mm, 0.115 mm and 0.168 mm with stepwedge objects on it and use the same factor, namely kV eksposi: 64.5 and mAs: 16. In each of the imaging plate in eksposi 3 times and the results of each radiograph imaging plate will be measured by using a densitometer. Stepwedge radiograph of the measurement results will be obtained the density and contrast value of each imaging plate. Contrast value for each imaging plate will be compared so they will know what the size of the imaging plate which has a higher contrast value. Research on the effects of different pixel size on the imaging plate is done in Radiology Hospital Tugu Semarang, in July 2014. From the results it can be concluded each different pixel sizes on the imaging plate will generate a different image quality.Keywords: pixel,imaging plate,Quality Preview, contras , density
Karakterisasi reaktor plasma berarus positif dengan konfigurasi elektroda titik-bidang dan penerapannya pada kain polyester grey Ukhti Nurohma Rizki; Zaenul Muhlisin; Fajar Arianto
Youngster Physics Journal Vol 7, No 1 (2018): Youngster Physics Journal Januari 2018
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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In this research, the effect of corona discharge plasma radiation on polyester knitting fabrics aimed at obtaining characterization of stress, current and distance relationships, obtaining ion mobility values, obtaining irradiated polyester knit fabric characterization, and obtaining SEM results showing morphological changes fabric. The reactor used is a corona discharge plasma reactor with a configuration of positive point of origin with DC high voltage generator, 15x15 cm in size with the number of 100 point needles. Factors affecting non-sample characterization or with polyester knit fabric sample as irradiation parameters include duration of irradiation, electrode spacing, and applied voltage. Based on the results of unsampled characterization and with samples using 10 variations of distance, from 0.9 cm, 2.1 cm, 2.4 cm, 2.7 cm, 3.0 cm, 3.3 cm and 3.6 cm. The result of unsampled characterization shows the current and the resulting voltage is higher than the sample. This, due to the resistivity of the fabric is lower than air resistivity, so the resulting voltage and current are small. Can be seen at a distance of 0.9 cm without sampling a rise in current of 2.5 mA with a magnitude of 0.535 kV, and there is a sample at a current rise at 2.5 mA resulting only a voltage of 0.236 kV. The resulting ion mobility shows that the greater the electrode distance the ion mobility becomes smaller. The water drop test used 5 variations of distance from 1.2 cm, 1.5 cm, 1.8 cm, 2.1 cm and 2.4 cm with duration of 5-35 minutes with 5-minute increments. Water drop test results also show that the longer the process of irradiation of polyester knitting cloth gray, then the absorption time increases. This is shown in the study where the duration of 5 minutes obtained the absorption time of 6.42 seconds while in the duration of 35 minutes obtained time 2.87 seconds. in SEM test results used 3 fabric where the fabric I as control, fabric II and fabric III experienced plasma irradiation. The control fabric has a finer surface than the plasma-treated cloth. SEM test results note that plasma change morphology on polyester fabric, thus increasing the roughness of fabric surface. Keywords: polyester fabrics, ion mobility, multi-point fields, textile treatment, corona plasma, clashing fabric properties
PENERAPAN TEKNOLOGI PLASMA DENGAN MEMANFAATKAN RANCANG BANGUN OZONE GENERATOR UNTUK PENGAWETAN CABAI MERAH (CAPSICUM ANNUUM L.) GUNA MENDUKUNG KETAHANAN PANGAN NASIONAL Yudi Pratama; Anna Adianti; Dhyan Prastiwi; Rofiqotul Khasanah; Zaenul Muhlisin; Muhammad Nur
Youngster Physics Journal Vol 5, No 2 (2016): Youngster Physics Journal April 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

In the research, done ozonation of red chili (Capsium annum L.) to getting preservation methods for saving red chili (Capsicium annum L.). To observe the effect treatment of ozone gas, cleaned chili then soaking on water while ozone was dissolving on the water. Then chili that dissolving on water ozonation to be saving on open space, glass cupboard and cooling spacie.On saving to one month have getting that red chili has ozonation and saving on cooling space still in fresh condition.Keywords: Red pepper, ozone, ozone generator
KARAKTERISTIK THERMOLUMINESCENT DOSIMETERS UNTUK DOSIMETRI IN VIVO PADA RADIOTERAPI EKSTERNA Mursiyatun Mursiyatun; Evi Setiawati; Zaenul Muhlisin
Youngster Physics Journal Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The Characteristics of Thermoluminescent Dosimeters (TLD) for in vivo dosimetry in external radiotherapy have been examined. The research was intended to determine the TLD calibration factor and TLD correction factors to various radiation doses, source surface distance (SSD), size field and angle of incidence so that the TLD can be beneficial for in vivo dosimetry. TLD was placed on the surface of solid water phantom and ionization chamber at the reference depth (10 cm). Then was irradiated using 6 MV photons with variation in radiation doses, SSD, size field and angle of incidence. The research  resulted in the TLD calibration factor (4,26 + 0,3) x 10-2 cGy/nC. The value of TLD correction factors at the number of MU 100, SSD 100 cm, size field 10 x 10 cm2 and angle of incidence 00 was 1.Keywords: Thermoluminescent Dosimeters (TLD), in vivo dosimetry, calibration factor, correction factor
Study of the most responsible parameters on polarization for powerful preliminary test of oil quality Ketut Sofjan Firdausi; Suryono Suryono; Priyono Priyono; Zaenul Muhlisin
Youngster Physics Journal Vol 7, No 2 (2018): Youngster Physics Journal April 2018
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

In this study, the most responsible parameters on polarization in total natural vegetable oils and fats have been investigated by determination of the relation between the polarization change and fatty acids (FA) composition. The change of light polarization was simply measured by using a pair of polarizer-analyser to indicate oil quality level, and the FA composition was obtained by using Gas Chromatography and Mass Spectrometer (GCMS) method. Various vegetable oils and fats were examined without any preliminary treatments. The experimental condition of the samples during measurement was assumed to be constant. It has been shown that various oils and fats have different angle of change of polarization, which indicates various oil quality level relative to each other, in agreement to the previous works. Especially for vegetable oils, high change of polarization has been considered as low quality of oil. The long chain of saturated fatty acids (SFA) and unsaturated fatty acids (UFA), which are distributed at third position (R3) and first position (R1) of triglycerides (TG) molecules, are responsible for the change of polarization and presented as a linear combination of the number of SFA or UFA. The result shows that the polarization could be used as powerful method for preliminary detection of oil quality level. The highest number of coefficient of C19:0 in lard indicates that this method has provided good prospect to evaluate the halal level of oil due to lard contamination.Keywords—polarization, triglyceride (TG), saturated fatty acid (SFA), unsaturated fatty acids (UFA)
KAJIAN TAMPANG LINTANG HAMBURAN ELEKTRON DENGAN ION MELALUI TEORI HAMBURAN BERGANDA (MULTIPLE SCATTERING THEORY) Nouval Khamdani; Muhammad Nur; Zaenul Muhlisin
Youngster Physics Journal Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Theoretical studies have been conducted on the Cross-sectional scattering equation which is one of the effects from collisions between electrons with ion. This theoretical studies aim to obtain the differential cross-section scattering equations of electrons with ion. Born approximations were used and convert potential energy into potential energy which is obtained from the distribution of ions in the Debye sphere, so the new equation for the scattering of amplitude that can write  will comparable with total sum of ions and also the scattering of cross section is   will too comparable with the large of Debye sphere. Keywords: scattering of amplitude, scattering of cross section, Born approximation, potential energy, Debye sphere, total sum of ions
Karakterisasi reaktor plasma berarus positif dengan konfigurasi elektroda multi garis-bidang Sholehah Aisyah; Muhlisin Zaenul; Arianto Fajar
Youngster Physics Journal Vol 6, No 2 (2017): Youngster Physics Journal April 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Plasma technology is the most widely researched technology. Research on various types of plasma reactors began much done in order to obtain plasma which has high homogeneity. This study aims to obtain plasma discharge characteristic I-V relations in the plasma reactor wire-plate electrode configuration. This study uses nine electrodes wire with a length of 12 cm and a diameter of 0.38 mm as the positive electrode and PCB as a negative electrode plates. Characterization of plasma corona wire-plate is done by adjusting the distance between the electrodes of 1.8 cm, 2.1 cm, 2.4 cm, 2.7 cm, 3.0 cm, 3.3 cm, 3.6 cm, 3.9 cm, 4.2 cm, and 4.5 cm. The results showed that the current increases with the applied voltage and inversely proportional to the distance between the electrodes. In the future this method it is possible to be applied on an industrial scale.Keywords: Plasma corona, plasma corona wire-plate
Evaluation of Novel Integrated Dielectric Barrier Discharge Plasma as Ozone Generator Muhammad Nur; Ade Ika Susan; Zaenul Muhlisin; Fajar Arianto; Andi Wibowo Kinandana; Iis Nurhasanah; Sumariyah Sumariyah; Pratama Jujur Wibawa; Gunawan Gunawan; Anwar Usman
Bulletin of Chemical Reaction Engineering & Catalysis 2017: BCREC Volume 12 Issue 1 Year 2017 (April 2017)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (692.696 KB) | DOI: 10.9767/bcrec.12.1.605.24-31

Abstract

This paper presents a characterization of an integrated ozone generator constructed by seven of reactors of Dielectric Barrier Discharge Plasma (DBDP). DBDP a has spiral-cylindrical configuration. Silence plasma produced ozone inside the DBDP reactor was generated by AC-HV with voltage up to 25 kV and maximum frequency of 23 kHz. As a source of ozone, dry air was pumped into the generator and controlled by valves system and a flowmeter. We found ozone concentration increased with the applied voltage, but in contrary, the concentration decreased with the flow rate of dry air. It was also found that a maximum concentration was 20 mg/L and ozone capacity of 48 g/h with an input power of 1.4 kW. Moreover, in this generator, IP efficiency of 8.13 g/kWh was obtained at input power 0.45 kW and air flow rate of 9 L/min. Therefore, be the higher ozone capacity can be produced with higher input power; however, it provided lower IP efficiency. The effect of dry air flow rate and applied voltage on ozone concentrations have been studied. At last, spiral wire copper was very corrosive done to the interaction with ozone, and it is necessary to do a research for finding the best metals as an active electrode inside of the quartz dielectric. 
Comparison of I-V Curves Between the Experiment of Corona Discharge on Gradient Line-To-Plane (GL-P) Configuration and The Mathematical Approach Susilo Hadi; Asep Yoyo Wardaya; Zaenul Muhlisin; Jatmiko Endro Suseno; Pandji Triadyaksa; Ali Khumaeni; Muhammad Nur
Journal of Physics and Its Applications Vol 3, No 2 (2021): May 2021
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v3i2.10491

Abstract

Research has been conducted on the comparison of the I-V characteristic curve between mathematical study and experiment of the generation of negative DC corona discharge in the Gradient Line-to-Plane (GL-P) electrode configuration. The reason for this research is to calculate the suitability of the corona discharge electrical current between the mathematical and experimental study. The active electrode used has length 2 cm and height 4 cm. This research is conducted with variations in the sharpness angle of the active electrode (θ) 300, 450, and 600 and variations in the distance between the electrodes () 2 cm, 3 cm, and 4 cm. The mathematical formulation of the value of the corona discharge electrical current in the configuration of the GL-P electrode is obtained by using the geometric concept approach, which is the formulation of the capacitance value of the ordinary electrical circuit, with the addition of the multiplication factor value k in the sharp area of the active electrode, because in that area the greatest plasma flow distance is obtained. The value of the multiplication factor  is obtained by fitting the curve between mathematical study and experiments. The I-V curve between the mathematical study and the corona discharge generation experiment has a high degree of similarity with the smallest percentage contacting point of 37.50%.The value of the multiplication factor  is influenced by the sharpness angle of the active electrode shape and the distance between the electrodes.
Co-Authors Achmad Sjaifudin Tayibnapis Ade Ika Susan Adhi Prasetyo Agus Setyawan Ahmad Sudin Ahmas Sudin, Ahmas Alfajrin, Achmad Chalid Afif Ali Khumaeni Amatul Lutfiah Andi Wibowo Kinandana Andi Wibowo Kinandana Anna Adianti Anwar Usman Ardhianto, Khamdi Bagas Ari Bawono Putranto Ariij Naufal Arzi, Yudha Hamdi Asep Yoyo Wardaya Azzuma Hasna Azzulkha Baital, Muhammad Sawal Bawono, Ari Binu Soesanto, Qidir Maulana Charis Munajib Choirul Anam AM Diponegoro Darliawati, Herli Dhyan Prastiwi Dhyan Prastiwi Dhyan Prastiwi Erma Prihastanti Evi Setiawati F Arianto Fajar Arianto Fajar Ariyanto Fakhruddin Mangkusasmito Filemon Jalu N Putra Geoff Dougherty Gunawan Gunawan Hadi, Muhammad Rafli Irsyad Hasan, Siti Nurjannah Hendri Widiyandari Hendri Widyandari Heri Sugito Heri Sutanto Heri Sutanto Herli Darliawati Iis Nurhasanah Imam Firmansyah Isnain Gunadi Jatmiko Endro Suseno Ketut Sofjan Firdausi, Ketut Sofjan Komariah, Rahma Nur Kusworo Adi Mahendra Kusuma Nugraha Mardhiyatna, Mardhiyatna Megarini Hersaputri Muhammad Adrian Lathif Muhammad Nur Muhammad Nur Muhammad Nur Muhammad Nur Muhammad Nur Muhammad Nur Muhammad Nur Muhammad Nur Mursiyatun Mursiyatun Nazuwatussya'diyah, Nazuwatussya'diyah Nouval Khamdani Nur, Muhammad Nuraini, Desy Pandji Triadyaksa Prastiwi, Dhyan Pratama Jujur Wibawa Priyono Priyono Putra, Bintang Ridzky Ranindra Rin Hafsahtul Asiah Riska Amilia Rizky Maylia Rofiqotul Khasanah S Juliawan S. Suryono Sapto P Putro Sapto P. Putro Sari, Rizki Yustisia Sholehah Aisyah Sri Widodo Agung Suedy Sulistia Nurdianik Sumariyah Sumariyah Surahman, Arif Susilo Hadi Susilo Hadi, Susilo Syamsul Arifin Tayibnapis, Achmad Sjaifudin Ukhti Nurohma Rizki Wahyu S. Budi Wienda Intan Permatasari Windarta, Jaka Wulandary Oktiyana Yudi Pratama Yusup Hidayat