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All Journal Reaktor Komunikasi Fisika Indonesia Journal of Aceh Physics Society Spektra: Jurnal Fisika dan Aplikasinya Communications in Science and Technology Jurnal Fisika Indonesia Dinamika Lingkungan Indonesia Indonesian Journal of Physics (IJP) Aceh International Journal of Science and Technology Jurnal Material dan Energi Indonesia Science, Technology, and Communication Journal

Yanuar Hamzah

Jurusan Fisika FMIPA Universitas Riau, Pekanbaru, Indonesia

Author-ID : 2877727

Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Physics

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EDDY CURRENT SENSOR BERBASIS FLAT COIL FR4 UNTUK MENENTUKAN KETEBALAN PELAT LOGAM NON MAGNETIK AL Tengku Emrinaldi; Salomo Salomo; Yanuar Hamzah; Iwantono Iwantono; Lazuardi Umar
Spektra: Jurnal Fisika dan Aplikasinya Vol 2 No 3 (2017): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 2 Nomor 3, Desember 2017
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Abstrak Sensor arus eddy (eddy current) digunakan untuk pengukuran ketebalan logam khususnya logam non magnetik seperti alumunium. Penelitian ini telah mengembangkan sensor eddy current berbahan PCB (printed circuit board) jenis FR4 yang memiliki ketebalan lapisan tembaga 35micron. Prototipe yang dihasilkan mempergunakan koil sensor dengan jumlah gulungan (n) 30 lilitan, diameter (Ã†) 30mm, lebar dan jarak antar koil, (dkoil) 0,254mm dan tahanan (Rkoil) sebesar 4,26â„¦. Respon sensor ketebalan pelat logam terhadap bahan uji dievaluasi dengan memberikan eksitasi frekuensi tunggal 700Khz, 1MHz dan 1.33MHz. Rangkaian ketebalan pelat telah mempergunakan rangkaian pengunci fasa (phase locked loop) dan mampu mengukur variasi ketebalan mulai 0,2 mm sampai 2 mm, sementara jarak antara sensor dengan logam uji dijaga konstan 2 mm. Hasil pengukuran memberikan respon kurva U(t) dalam hubungan Kata-kata kunci:sensor eddy current, PCB FR4, material non magnetik, ketebalan logam, rangkaian phase locked loop Abstract Eddy current sensor is used to measure the thickness of metals, especially non-magnetic metals such as aluminum. This research has developed eddy current sensor made from PCB (printed circuit board) type FR4 which has 35micron copper layer thickness. The developed prototype uses a designed coil sensor with the number of winding (n) 30 turn, diameter (ïƒ†) 30mm, width and distance between coils, (dkoil) 0.254 mm and coil resistance (Rkoil) of 4.26 Î©. The sensor response to the test material was evaluated by giving a single frequency excitation of 700 Khz, 1 MHz and 1.33 MHz. The plate thickness electronics has used a phase locked loop circuit and is capable to measure the thickness variations from 0.2 mm up to 2 mm, while the distance between the sensor coil and the test object was kept constant at 2 mm. The measurement results give the U (t) curve response in the exponential relationship. Keywords: eddy current sensor, PCB FR4, nonmagnetic material, thickness, phase locked loop circuit

MULTI-CHANNEL FRY COUNTER DESIGN USING OPTOCOUPLER SENSOR Lazuardi Umar; Yanuar Hamzah; Rahmondia N Setiadi
Spektra: Jurnal Fisika dan Aplikasinya Vol 4 No 2 (2019): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 4 Issue 2, August 2019
Publisher : Program Studi Fisika Universitas Negeri Jakarta

This paper describes a design of a fry counter intended to be used by consumption fish farmer. Along this time, almost all the fry counting processes are counted by manual, which is done by human. It is requiring much energy and needs high concentration; thus, can cause a high mental and emotional exhaustion for the fry counting worker. Besides that, the human capability and capacity for counting the are limited to a low number. A fry counter design in this study utilizes a multi-channel optocoupler sensor to increase the counting capacity. The multi-channel fry counter counting system is developed as a solution to a limited capacity of available fry counter. This design uses an input signal extender system for the sensor. The design is based on the interrupt combiner to accommodate multi-channel sensor used. Besides, the transmitter beam's angle is adjusted to deal with the deflection due to water surface. From the experiment, multi-channel sensor can be implemented and high accuracy level could be obtained on the counting and channel number detection, therefore, this design can be implemented and could help farmers to increase the production capacity of consuming fish.

SEED MEDIATED SYNTHESIS OF HEXAGONAL S-DOPED ZnO NANOROD AND ITS PHYSICAL PROPERTIES Yolanda Rati; Akrajas Ali Umar; Yanuar Hamzah; Ari Sulistyo Rini
Spektra: Jurnal Fisika dan Aplikasinya Vol 6 No 1 (2021): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 6 Issue 1, April 2021
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.061.03

Sulfur-doped zinc oxide (S-ZnO) nanorod has been successfully synthesized via the seed-mediated hydrothermal method with different sulfur concentrations (0%, 1%, 2.5%). This research aims to study the influence of the concentration of sulfur on the structure, morphology, and optical properties of ZnO as a promising material in a wide range of applications. Crystal structure, morphology, and optical properties of the samples were characterized using X-Ray Diffraction (XRD), Field Emission Electron Scanning Microscopy (FESEM), and UV-Vis Spectroscopy, respectively. The XRD pattern shows the strongest peak at 2θ = 34.43° for crystal orientation of (002). The crystallinity properties of the S-ZnO sample are higher compared to the ZnO sample. The FESEM images of the 1% S-ZnO sample exhibit the highest nanorod density arrangement. The optical absorbance of the higher sulfur dopant possesses a higher optical absorption peak on the UV-Vis spectrum. The results indicate that S doping to ZnO can alter the structural, morphological, and optical properties of ZnO.

Emisi Metan Sektor Pertanian Kampung Iklim Desa Mukti Jaya Kecamatan Rimba Melintang Kabupaten Rokan Hilir Provinsi Riau Yenny Desvita; Erwin Erwin; Yanuar Yanuar; Zulfan Saam
Dinamika Lingkungan Indonesia Vol 6, No 1 (2019)
Publisher : Universitas Riau

Methane emissions of agriculture sector in Indonesia from year to year increase. To reduce the rate of methane emissions increase, the Indonesian government in 2012 through the Ministry of Environment launched the Kampung Iklim program. One of the villages included in Kampung Iklim Program is Mukti Jaya Village, Rimba Melintang Sub-district, Rokan Hilir Regency, Riau Province. This research aims to analyze methane emission model of agriculture. The research was conducted through survey by field research method. Research location in Mukti Village Rimba Melintang District Rokan Hilir Regency Riau Province. The value of methane rice land emissions in Mukti Jaya Village from 2011-2015 has increased due to changes in some methane producing parameters. The use of Cisadane varieties produced the highest methane emissions compared to the Ciherang and Dodokan varieties of 0.00029 Gg CH4/year/ ha.

Cyclic Voltammetry Sel Superkapasitor Dengan Variasi Konsentrasi Aktivator Kalium Hidroksida Rakhmawati Farma; Melinda Vivi; Sugiyanto Sugiyanto; Awitdrus Awitdrus; Erman Taer; Hamzah Yanuar
Jurnal Fisika Indonesia Vol 21, No 2 (2017)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfi.42203

Aktivasi kimia sangat berpengaruh terhadap kualitas elektroda sel superkapasitor. Pada penelitian ini elektroda karbon berasal dari serabut tandan kosong kelapa sawit melalui proses pra karbonisasi dan aktivasi kimia dengan menggunakan aktivator kalium hidroksida (KOH) dengan variasi konsentrasi 0.3 M, 0.6 M dan 0.9 M dengan lama waktu aktivasi 20 jam. Proses selanjutnya adalah proses karbonisasi menggunakan gas N2 dan proses aktivasi fisika menggunakan gas CO2. Nilai densitas elektroda karbon menunjukkan peningkatan setelah proses aktivasi fisika. Hasil analisa energi dispersif sinar-X menunjukkan bahwa elektroda karbon dengan konsentrasi 0.9 M mempunyai persentase atomik unsur karbon tertinggi sebesar 92,48%. Karakterisasi struktur mikro menunjukkan bahwa elektroda karbon bersifat semikristalin yang ditandai kehadiran puncak landai (002) dan (100) pada sudut 2θ sekitar 24° dan 45°. Elektroda karbon dengan konsentrasi 0,9 M mempunyai nilai dimensi mikrokristalin Lc tertinggi yaitu sebesar 7,27 Å dan nilai La terendah yaitu sebesar 6.97 Å dibandingkan dengan elektroda sel superkapasitor dengan konsentrasi 0.3 M dan 0.6 M. Karakterisasi sifat elektrokimia sel superkapasitor dengan menggunakan Cyclic Voltammetry (CV) menunjukkan bahwa sel superkapasitor pada konsentrasi KOH 0.9 M menunjukkan niai tertinggi yaitu sebesar 110, 724 F/g.

STUDI TERMODINAMIKA PENUMBUHAN LAPISAN TIPIS Ga2Te3 Yanuar Hamzah; Ariswan Ariswan
Komunikasi Fisika Indonesia Vol 19, No 3 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.3.128-135

Understanding the thermodynamic properties of Ga2Te3 material is a basic concept in material applications. Ga2Te3 material has attracted the attention of many researchers, especially its application in photodetector devices, light-emitting diodes, nano-electronics, and lithium storage materials. Therefore, this research studied the Ga-Te system thermodynamically optimized crystal temperature using F*A*C*T software. The availability of thermodynamic data from this study may be helpful in the experiments. A thin layer of Ga2Te3 fabricates using the closed space vapor transport method. A thin layer of Ga2Te3 characterizes by x-ray diffraction and energy dispersive spectroscopy (EDX). The thin layer of Ga2Te3 resulting from deposition is cubic structured crystalline, and its composition is stoichiometric. The results of the thermodynamic study of the deposit of the thin film Ga2Te3 explain a thorough understanding of the formation mechanism of the reactions that occur in the closed space vapor transport method in the vertical reactor.

Structural Properties of the Quaternary Alloy CuIn(SxSe1-x)2 Awitdrus Awitdrus; Yanuar Yanuar
Indonesian Journal of Physics Vol 13 No 3 (2002): Vol. 13 No.3, Juli 2002
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (74.997 KB)

In this paper we report the structural characterization of the quaternary alloy CuIn(SxSe1-x)2 grown by the horizontal Bridgman method. It is found that the CuIn(SxSe1-x)2 crystals have a chalcopyrite structure. With increasing x, lattice constants decrease following Vegard’s law.

Structure and Photoluminescence of the Ordered Vacancy Compound Cu3In7Se12 Salomo Salomo; Yanuar Yanuar
Indonesian Journal of Physics Vol 14 No 4 (2003): IJP Vol. 14 No. 4, October 2003
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (126.626 KB)

We have synthesized polycrystalline Cu3In7Se12 bulk crystals by the horizontal Bridgman method. The crystal structure of the ordered vacancy compound is investigated by X-ray diffraction and Rietveld refinement analysis. The lattice parameters are a = 5.7616 Å and c = 11.5391 Å and the space group is uniquely specified to be I42m. The photoluminescence spectra are investigated at the liquid helium temperature range in order to determine the defect level of this compound. Photoluminescence spectra of the sample exhibit two transitions at 1.08 eV and 0.95 eV which are identified as donor-acceptor transitions.

Characterization of Rare Earth Elements in Tailing of Ex-Tin Mining Sands from Singkep Island, Indonesia Yanuar Hamzah; Muhammad Mardhiansyah; Liong Nyuk Firdaus
Aceh International Journal of Science and Technology Vol 7, No 2 (2018): August 2018
Publisher : Graduate Program of Syiah Kuala University

The objective of this research is to determine the rare earth elements (REEs) from themonazite minerals content of several tin tailing sands (TTS)of ex-tin mining area in Kuala Raya Singkep Island, Indonesia. We used the energy dispersive analysis of X-ray (EDAX)-scanning electron microscopy (SEM) and x-ray diffraction (XRD) to characterize the contents of the samples. The coupled analytical of XRD with SEM/EDX approach enabled to be used for mineralogical identification on the heavy mineral as a rapid determination approach. The analysis of the samples indicates only the presence of REEs including lanthanum (La), cerium (Ce), and thorium (Th) are consistent with the identification of monazite and minerals in the tailing sand. The results show that the average REEs consist of La at 0.2 .%, Ce at 7.8 %, and Th at 2.0% respectively. It is concluded that monazite minerals in TTS has an economic potential to be developed. These monazite minerals can be used as material for semiconductor devices.

PEMBUATAN KOMPOSIT KARBON DARI CAMPURAN ARANG BAMBU DENGAN PETROLEUM COKE MENGGUNAKAN METODA KARBONISASI YANUAR HAMZAH; LAZUARDI UMAR; USMAN MALIK
Jurnal Material dan Energi Indonesia Vol 7, No 02 (2017)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Telah dilakukan penelitian pembuatan komposit karbon dari campuran arang bambu jenis (Gigantochloa apus) dengan petroleum coke dari limbah industri pengolahan minyak bumi menggunakan metoda karbonisasi. Pada penelitian ini dilakukan perlakuan dengan persentase rasio massa arang bambu:petroleum coke adalah 70:30, 50:50 dan 30:70 menggunakan perekat resin berbentuk lingkaran dengan diameter 3 cm lalu ditekan dengan alat hydrolic testing machine agar komposit karbon dihasilkan menjadi padat. Sifat struktur, morfologi dan komposisi komposit dianalisa menggunakan difraksi sinar-x, mikroskop pindai elektron dan energy dispersive x-ray. Analisa pola difraksi sinar x telah dihitung jarak antar bidang (d) dan parameter kristal karbon meliputi stackheight, Lcdan stackwidth, La. Bentuk morfolgi komposit karbon terlihat tidak teratur dan berserat serta adanya mikropori dengan ukuran antara 10-100 mm. Persentase unsur karbon pada komposit karbon meningkat dengan meningkatnya persentase rasio massa petroleum coke setelah dianalisa menggunakan energy dispersive x-ray specrtroscopy dan terdapat sejumlah kecil persentase silikon dan kalium.

Co-Authors Adela, Adela Aisy, Rihla Datul Akrajas Ali Umar Alamin, Rahmatan Lil Amanullah, Farid Apriwandi Apriwandi . Ariswan Ariswan Aritonang, Surya Ardika Asiyah, Putri Siti Awitdrus Awitdrus, Awitdrus Azhara, Vina Naomi Butarbutar, Kheny Kernila Darmawan, Ade Dasta, Vicky Vernando Dewi Ramayani Dian Putri Oktavia Dian Putri Oktavia, Dian Putri Erman Taer Erwin Erwin Erwin Erwin Fachry Abda El Rahman Fatanah, Harum Fatimah, Desti Seri Febrita, Ayang Fitri Hayati Ghifariansyah, Abdu Rozaq Iwantono Iwan Barnawi Jimmy Copriady Kartika, Nursiti Sari Krisman Krisman Laia, Meinikmawati Lailatul Rahmi Lazuardi Lazuardi Lazuardi Umar Lazuardi Umar Liong Nyuk Firdaus Manik, Yohana Manurung, Romarito Gesi Maria Sonya Nauli Nainggolan Maslyah, Maharani Nur Maulidya, Shintya Maya Sari Mega Wati Siregar Melinda Vivi Miftahul Jannah Minarni Shiddiq, Minarni Mozaffari, Nastaran Mozaffari, Niloofar Muhammad Mardhiansyah Nahampun, Fernita Nasir, Zulfa Nathania, Nazhiwa Ningrum, Yunita Noferdi, Muhammad Deri Novi Yanti Nuraini, Nasywa Nursyahara, Septia Pasaribu, Veny Sriulina Pratiwi, Dinda Purba, Rosianna Putri, Ella Junian Putri, Nadja Melika Rabiah Rabiah Rabin, Mohammad Fisal Rahmi Dewi Rahmondia N. Setiadi Rahmondia N.S ' Rakhmawati Farma Rati, Yolanda Rini, Ari Sulistyo Rini, Ari Sulistyo Rosman Parningotan Rusmanianty, Rusmanianty Safira, Putri Salomo Salomo Salomo Salomo Salsabila, Sonia Sari, Eza Tirta Sari, Silvia Mayang Sawitri, Seli Novalin Selasih, Dian Sihombing, Ropina Emwarjati Silaban, Ruth Cahaya Marta Uli Simanjuntak, Ignatius Bagas Sumual Simatupang, Mediniah Putri Simbolon, Norsinta Ida Sinaga, Sintia Selfiana Siti Komariah Sugiyanto Sugiyanto Supian, Faridah Lisa Susi ' Syahputri, Intan Syajali, Hidayati Tengku Emrinaldi Tengku Said Hussain Shahab Tetty Marta Linda Titin Hartini Umar, Lazurdi Usman Malik Usman Malik Usman Usman Yenny Desvita Yoga, Figo Swarna Yudani, Ananda Febri Ziliwu, Friska Zulfan Saam Zuyandri, Wandra

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