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INDONESIAN JOURNAL OF APPLIED PHYSICS

ijap
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Published by Universitas Sebelas Maret

ISSN : 20890133 EISSN : 24776416 DOI : -

Core Subject : Science,

Astronomy Energy Materials Science & Nanotechnology Physics

Indonesia Journal of Apllied Physics provides rapid publication of short reports and important research in all fields of physics. Indonesia Journal of Apllied Physics publishes articles that are of significance in their respective fields whilst also contributing to the disclipline of physics as a whole. Articles should be submitted to the Editorial Office of Indonesia Journal of Apllied Physics through this site. Further information on submission is also available at this site

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Articles 267 Documents

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Physical Modeling on Time Domain Induced Polarization (TDIP) Response of Metal Mineral Content Yatini Yatini; Djoko Santoso; Agus Laesanpura; Budi Sulistijo
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 8, No 2 (2018): October
Publisher : Department of Physics, Sebelas Maret University

The Induced Polarization (IP) methods is an extension of resistivity method by adding ability of the ground in storing electrical charge. One of the measurement technique is done in time domain, hereinafter referred to as Time Domain Induced Polarization (TDIP). TDIP responses measured on the surface are affected by the physical properties of the subsurface. Research in TDIP response modeling studies is performed to obtain a quantitative relationship between response to metallic mineral content at subsurface. The relationship can be obtained by forward and physical modelling. The forward modeling produces a curve that connects TDIP response to the subsurface parameters and an array. The laboratory-scale physical model is performed on the sand-box size (200x100x70) cm3 by varying iron-ore content in a sphere target. TDIP response measurements on physical models is done using Dipole-dipole and Wenner configuration. The relationship between the TDIP response and metal mineral content is obtained by comparing the results of measurements on physical modeling and forward modelling. There is good appropriatement between the theoretical curves and measuring results of the physical modelling. The greater of iron-ore content on the target, increasing in the TDIP response.

A Comparison between Drilling and Standard Penetration Test (SPT) Data to the Electrical Resistivity Sounding with Schlumberger Configuration in UNS Area Sinta Nur Rizqi Listanti; Darsono Darsono; Yusep Muslih Purwana
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 8, No 2 (2018): October
Publisher : Department of Physics, Sebelas Maret University

The geophysics test using electrical resistivity method has been conducted in the area of UNS Campus to indicate the lithological of subsurface. This method is categorized as a Non-Destructive Test (NDT) due to the data acquisition is done at the ground level and no destruction during the test, which is more advantageous than destructive method such as drilling and SPT test. This study was performed with Schlumberger configuration in three location by electrical resistivity sounding. The acquisition data uses Resistivity meter OYO 2119 McOHM-EL with the track length is 100 m, while the data processing use IPI2Win to get a logarithmic graph between distance and resistivity and Origin to obtain graphic of resistivity and SPT. The result of this study indicates that electrical resistivity has a good correlation with SPT data. The electrical resistivity graph shows a linear increase along with increment of the depth, which is similar to the SPT graph. The slope difference at the first location is 2.44±1,197, the second location is 2.028±0.822, and the third location is 0.622±0.735.

Crystal Structures and Magnetic Properties of Polyethylene Glycol (PEG-4000) Encapsulated Co0.5Ni0.5Fe2O4 Magnetic Nanoparticles Edi Suharyadi; Lintang Griyanika; Joko Utomo; Ayu Kurnia Agustina; Takeshi Kato; Satoshi Iwata
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 8, No 2 (2018): October
Publisher : Department of Physics, Sebelas Maret University

Nanocrystalline mixed spinel ferrite of Co0.5Ni0.5Fe2O4 magnetic nanoparticles (MNPs) has been successfully synthesized by coprecipitation method and encapsulated by PEG-4000 with various concentrations. X-Ray Diffraction (XRD) patterns showed that nanoparticles contained Co0.5Ni0.5Fe2O4 spinel ferrite with crystallite size of 14.9 nm. After PEG-4000 encapsulation particles size decreased became 7.7 nm. Interaction Co0.5Ni0.5Fe2O4 nanoparticles with long chain PEG-4000 caused the crystal growth trap. Lattice parameter and X-Ray density have no significant difference after encapsulated PEG-4000. The coercivity (????????) of Co0.5Ni0.5Fe2O4 was 214 Oe. The ???????? decreased after PEG-4000 encapsulation became 127 Oe, which is due to the decrease of crystallite size. The maximum magnetization (Mmax) of Co0.5Ni0.5Fe2O4 was 12.0 emu/g, and decreased after PEG-4000 encapsulation to 11.7 emu/g, because PEG-4000 is paramagnetic. After the concentration of PEG-4000 increased, then the amount of paramagnetic material increase which lead maximum magnetization decrease.

Interpretasi Struktur Bawah Permukaan Jalur Sesar Opak Berdasarkan Model Suseptibilitas dan Second Vertical Derivative dengan Metode Geomagnet Desi Novi Dayana; Nugroho Budi Wibowo; Denny Darmawan
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 8, No 02 (2018) : IJAP Volume 8 ISSUE 02 YEAR 2018
Publisher : Department of Physics, Sebelas Maret University

Tujuan dari penelitian ini adalah untuk mengetahui struktur bawah permukaan jalur Sesar Opak berdasarkan model suseptibilitas dan SVD dengan metode geomagnet. Pengambilan data dilakukan menggunakan Proton Precession Magnetometer Geometric tipe G-856 dengan 77 titik pengukuran dan jarak antar titik pengukuran +2 km. Pengolahan data dilakukan melalui koreksi variasi harian, koreksi IGRF, SVD, dan reduksi ke kutub. Pemodelan dilakukan dengan menganalisis anomali medan magnet yang telah direduksi ke kutub. Hasil pemodelan solid model menunjukkan bahwa Formasi Semilir dengan nilai suseptibilitas (0 – 100) ×10-3, Formasi Merapi Muda dengan nilai suseptibilitas (0 – 2) ×10-3, dan Formasi Nglanggran dengan nilai suseptibilitas (0,6 – 70) ×10-3. Hasil pemodelan SVD dan solid model menunjukkan keberadaan Sesar Opak.

Numerical Analysis of Fusion Cross Section of (_^16)O+(_^16)O by Using The Modified Glas-Mosel Formula Yacobus Yulianto; Zaki Su'ud
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 8, No 2 (2018): October
Publisher : Department of Physics, Sebelas Maret University

One of the interesting topics in nuclear reactions is a study about reaction cross section between the interacting nuclei. For calculating fusion cross section, the Glas-Mosel formula has been proven successfully in explaining the experimental results of fusion cross section. In this study, the fusion cross sections of O16+O16 reaction were calculated by using modified Glas-Mosel formula. The energies were set at 10≤????≤40 MeV. The potential of interacting nuclei was approached by using Woods-Saxon potential. In numerical process, the differential equations were solved by using finite different method and optimization process was performed by using Nelder-Mead method. Good agreement between the experimental and this study results has been achieved successfully. Referring those results above, it can be indicated that the modified Glas-Mosel formula has good capability to explain the experimental results of fusion reaction of light nuclei. It can be a useful tool in explaining the experimental results or in predicting fusion cross section of light nuclei.

Pengaruh Suhu Annealing terhadap Struktur Mikro dan Sifat Optik Lapisan Bismuth Ferrite (BiFeO3) Yofentina Iriani; Novinda Hary Megasari; Fahru Nurosyid
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 9, No 01 (2019) : IJAP Volume 9 ISSUE 01 YEAR 2019
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v9i01.33262

Penelitian ini bertujuan untuk mengetahui pengaruh suhu annealing terhadap struktur mikro dan sifat optik lapisan Bismuth Ferrite (BiFeO3). Lapisan BiFeO3 telah berhasil berhasil terdeposisi di atas substrat quartz menggunakan metode Chemical Solution Deposition (CSD). Struktur mikro dikarakterisasi menggunakan XRD dan sifat optik dikarakterisasi menggunakan spektrofotometer UV-Vis. Variasi suhu annealing yang dilakukan yaitu 550oC, 600oC, dan 650oC. Suhu annealing mempengaruhi struktur mikro yaitu ukuran kristal, tingkat kekristalan, parameter kisi serta mempengaruhi sifat optik yaitu absorbansi dan energi gap lapisan BiFeO3. Semakin tinggi suhu annealing maka ukuran kristal, tingkat kekristalan, dan parameter kisi meningkat. Puncak absorbansi mengalami penurunan seiring dengan bertambahnya suhu annealing. Suhu annealing mempengaruhi energi gap lapisan BiFeO3. Energi gap paling rendah yaitu pada suhu annealing 650ºC sebesar (2,45 ± 0,02) eV.

Pemanfaatan Citra Landsat 8 untuk Pemetaan Potensi Mineralisasi Emas di Kabupaten Tapanuli Selatan, Sumatera Utara Shofitri Zuhannisa'; Bowo Eko Cahyono; Nurul Priyantari
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 9, No 01 (2019) : IJAP Volume 9 ISSUE 01 YEAR 2019
Publisher : Department of Physics, Sebelas Maret University

Kabupaten Tapanuli Selatan secara geologi merupakan daerah vulkanik tua dan disertai dengan adanya sesar yang mengindikasikan adanya batuan teralterasi hidrotermal yang dapat menjadi salah satu indikator potensi keberadaan logam salah satunya emas. Secara geologi, emas merupakan mineral logam yang berkaitan erat dengan proses magmatik dan lingkungan pembentukannya berada di dalam batuan vulkanik. Kegiatan eksplorasi emas saat ini banyak dilakukan dengan metode pemetaan lapang, akan tetapi metode tersebut mempunyai kendala dimana memerlukan biaya, energi, dan waktu yang relatif tinggi. Oleh karena itu, diperlukan metode untuk memudahkan eksplorasi emas salah satunya dengan penginderaan jauh. Tujuan dari penelitian ini adalah melakukan pemetaan serta pengukuran luasan potensi mineralisasi emas di Kabupaten Tapanuli Selatan dengan cara mengetahui zona alterasi hidrotermal dengan menggunakan metode penisbahan saluran (band ratios) dan lineament (kelurusan) yang ada di lokasi penelitian. Hasil penelitian ini diperoleh potensi mineralisai emas tersebar di tujuh kecamatan, yakni di Kecamatan Batang Toru, Angkola Sangkunur, Sipirok, Angkola Timur, Aekbilah, Batang Angkola, dan Sayurmatinggi. Pengukuran luasan wilayah potensi mineralisasi emas dilakukan dengan membuat polygon area. Berdasarkan luasan total di setiap kecamatannya, diperoleh kesimpulan bahwa potensi mineralisasi emas di Kabupaten Tapanuli Selatan yang paling luas terdapat di Kecamatan Batang Toru, yang juga ditunjukkan dengan adanya aktivitas pertambangan emas resmi yang beroperasi di wilayah Batang Toru.

Efek Penggunaan Cairan Ionik sebagai Aditif terhadap Konduktivitas Ionik Elektrolit Baterai Ion Litium Atut Reni Septiana; Evvy Kartini; Wagiyo Honggowiranto; Sudaryanto Sudaryanto; Rahmat Hidayat
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 9, No 02 (2019): October
Publisher : Department of Physics, Sebelas Maret University

Teknologi baterai litium ion merupakan alternatif penyuplai energi pada peralatan portabel, divais elektronik, dan aplikasi tenaga tinggi seperti kendaraan listrik dan penyimpanan daya untuk energi terbarukan. Pada baterai litium ion, elektrolit memainkan peranan penting pada performa baterai. Elektrolit baterai litium ion, pada umumnya terdiri dari garam litium yang dilarutkan dalam pelarut organik dan aditif. Namun, LiPF6 tidak stabil secara termal dan mempengaruhi performa baterai secara signifikan. Selain itu, pelarut standar (konvensional) juga memiliki beberapa kekurangan jika diaplikasikan pada kendaraan listrik. Terkait dengan masalah tersebut, penggunaan elektrolit jenis lainnya, yakni garam litium, seperti lithium bis (trifluoromethylsulfonyl) imide (LiTFSI) yang dapat dikombinasikan dengan cairan ionik menjadi sangat penting untuk dikaji. Oleh karena itu, dalam penelitian ini telah dikaji karakteristik konduktivitas ionik elektrolit berbasis LiTFSI. Pengukuran konduktivitas ionik elektrolit (LiTFSI) dalam pelarut karbonat dengan dan tanpa cairan ionik BMIMTFSI sebagai aditif telah dilakukan. Konduktivitas ionik elektrolit LiTFSI dalam pelarut karbonat dengan tambahan cairan ionik lebih tinggi dibandingkan LiTFSI tanpa tambahan cairan ionik, masing-masing yaitu 3.1 mS/cm and 2.7 mS/cm.

Identifikasi Keberadaan Lapisan Akuifer Tertekan (Confined Aquifer) Berdasarkan Data Geolistrik (Studi Kasus : Desa Sambirejo Kecamatan Plupuh Kabupaten Sragen) Darsono Darsono; Darmanto Darmanto
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 9, No 01 (2019): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v9i01.30122

Air menempati suatu wadah rongga di dalam tanah yang disebut dengan akuifer. Salah satu akuifer yang masih jarang digunakan adalah akuifer tertekan. Akuifer ini terletak lebih dalam, sehingga keberadaan perlu dideteksi lebih dahulu. Untuk mendeteksi keberadaan akuifer menggunakan metode geolistrik resistivitas. Alat yang digunakan adalah resistivitimeter OYO Model 2119C McOHM-EL, dengan konfigurasi Schlumberger dengan bentangan AB/2 samapai 350 meter. Pengambilan data dilakukan di Kecamatan Plupuh Kabupaten Sragen sebanyak 5 titik sounding. Pengolahan dilakukan dengan menggunakan software IP2win.Hasilnya menunjukkan bahwa lapisan akuifer di 5 titik sounding berupa lapisan pasir lempungan, pasir dan lapisan pasir kerikilan. Lapisan akuifer tertekan terdeteksi di: TS1 pada kedalaman 39,9 meter- 110 meter dengan litologi pasir kerikilan, TS2 pada kedalaman 40,25 meter – 66,58 meter dan 80,24 -139,7 meter dengan litologi pasir, TS3 pada kedalaman 47,25 meter – 101 meter dengan litologi pasir lempungan,TS4 pada kedalaman 40,72 meter – 103 meter dengan litologi pasir lempungan dan TS5 pada kedalaman 31,41 meter – 97 meter dengan litologi pasir lempungan.

Seismic Wave Propagation Simulation in a Poro-elastic Medium Using Spectral Method Elements in MPI-GPU Cluster: Study Case of Anticline Reservoir Trap Sudarmaji Sudarmaji; Indra Rudianto; Muhammad Kautsar Rahmareza; Yosua Alfontius
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 9, No 01 (2019): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v9i01.24750

Modeling 2D seismic wave propagation using spectral element method on MPI-GPU clusters has been implemented and can complete the problem of elastic-poro elastic medium model. Free surface boundary conditions and absorption layer will use the CPML method. Seismic wave propagation simulation in hybrid elastic-poroelastic medium has been carried out on hydrocarbon reservoir models with anticline type. In reservoir rocks that have a poro elastic medium, there will be a fast and slow P wave. While in non-reservoir rocks that have elastic medium, only P fast waves is observed. The computation time for an anticline type reservoir model with dimensions of 1 km x 1.5 km using MPI 4 nodes cluster with 48 CPU cores is 3 minutes 48 second.

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Risa Suryana

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rsuryana@uns.ac.id

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Location
Kota surakarta,

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