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Journal of Aceh Physics Society
Published by Universitas Syiah Kuala
ISSN : -     EISSN : 23558229     DOI : -
Core Subject : Science,
Physics
Focus of Journal of Aceh Physics Society (JAcPS) provides a forum for original paper works that enhances understanding of physics and their application. Scope of Journal of Aceh Physics Society (JAcPS) paper related to the development of new experimental methods, visualization techniques, material physics, optic, laser and instrumentation in physics is an important part of this journal. Experience gained and lessons learned in building test facilities and in measuring and reducing test data are important aspect of any experimental work. Authors are encouraged to report this experience and to summarize the original data. Archival review paper, short communication, invited papers, discussion of previously published papers, and book reviews are regular feature of the journal, in addition to full-length article.
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Articles 152 Documents
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Reduced to the Pole of Total Magnetic field Anomaly of Seulawah Agam Volcano, Aceh Besar Masyithah Masyitah; Nazli Ismail; Marwan Marwan
Journal of Aceh Physics Society Volume 7, Number 3, September 2018
Publisher : PSI-Aceh

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Abstract

Telah dilakukan penelitian dengan menggunakan metode magnetik pada kawasan Gunung Api Seulawah Agam, Aceh Besar untuk mempelajari respon anomali medan magnetik total berdasarkan hasil transformasi reduksi ke kutub. Akuisisi data medan magnetik total digunakan peralatan GEM System Proton Precission Magnetometer (PPM). Data diukur dalam bentuk lintasan, dengan panjang lintasan 16 km dan banyaknya titik pengukuran berjumlah 33 titik. Untuk mendapatkan anomali medan magnetik total dilakukan koreksi diurnal dan koreksi IGRF (International Geomagnetic Reference Field). Data anomali medan magnetik total dilakukan pengolahan lanjutan dengan transformasi reduksi ke kutub untuk memudahkan dalam interpretasi. Berdasarkan hasil interpretasi kualitatif, didapat pola anomali medan magnetik total reduksi ke kutub dengan respon anomali maksimum dan minimum yang langsung menunjukkan posisi sumber penyebab anomali dan kesesuaian dengan struktur patahan yang ada pada kawasan penelitian.Survey of magnetic method has been done at Seulawah Agam volcano, Aceh Besar. The survey is aimed to analysis reduction to the pole of total magnetic field anomaly. The total magnetic field data were acquired using GEM System Proton Precission Magnetometer (PPM) unit. The Measurements were performed along a profile with 16 km length and 33 stations. Total magnetic field anomaly data were calculated from the measured data by diurnal and IGRF (International Geomagnetic Reference Field) corrections. The total magnetic field anomaly data reduced to the pole for a better interpretaion. The reduced to the pole of total magnetic field anomaly data show a good agreement with geological structures and existence of faults in the area of study.Keywords: Magnetic method, total magnetic field anomaly, reduction to pole, Seulawah Agam
Study on Zeolit Milling with Liquid Benzene to Reduce Aglomeration in Mechanical Alloying Process Syarifah Fathmiyah; Analia Kesuma
Journal of Aceh Physics Society Volume 7, Number 3, September 2018
Publisher : PSI-Aceh

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Abstract

 Seringnya dilakukan kegiatan produksi mengecilkan ukuran butiran dengan menggunakan alat ballmill yang dilakukan di laboratorium Fisika Material melandasi pemikiran untuk dilakukannya penelitian ini. Sampel Zeolit yang menjadi salah satu material yang sering digunakan dalam proses produksi pengecilan ukuran butiran dengan menggunakan alat ballmill ini menjadi perhatian untuk kemudian diamati dan diteliti cara efektif untuk melakukan proses pengecilan ukuran butiran zeolit. Proses pengecilan ukuran butiran zeolit yang sering dilakukan kerap mengalami kendala, yaitu menggumpalnya material Zeolit dan membentuk lapisan padat pada dinding wadah atau yang sering disebut vial pada alat ballmill. Kesulitan memperoleh hasil yang baik pada akhir proses milling pun membuat waktu proses produksi menjadi kurang efektif. Untuk itu maka muncullah ide untuk mengamati dan menemukan cara bagaimana agar proses ini dapat dilakukan dalam waktu seefektif mungkin sehingga tidak menghambat untuk kemudian dilakukan penelitian lain di tingkat lanjut. Sebagai hasil, diharapkan dengan dilakukannya penelitian ini maka dapat diperoleh informasi tentang cara efektif melakukan proses pengecilan partikel Zeolit sehingga proses milling tidak lagi mengalami kendala ketika harus dihadapkan dengan jangka waktu penelitian yang ringkas. Research activities to reduce the size of granules by using a ballmill tool which is carried out in the Material Physics laboratory based on the thinking for this research. Zeolite samples which are one of the materials that are often used in the research process of grain size reduction by using a ballmill tool are of concern to be observed and investigated effective ways to process the size of zeolite granules. The process of reducing zeolite grain size which is often carried out often has problems, such as aglomeration, and forming a solid layer on the walls of the container or which is often called a vial on a ballmill. Difficulty getting good results at the end of the milling process also makes the production process less effective. For this reason, the idea arises to observe and find out how to make this process as effective as possible so that it does not inhibit further research later. As a result, it is expected that with this research, information on how to effectively reduce Zeolite particles can be obtained so that the milling process no longer has problems when it comes to a short period of research.Keywords: Zeolit, Reducing size, ballmill, mechanical alloy, aglomeration
Delineation of Gold Prospecting Area Based on Total Magnetic Field Anomalies Reduction to The Pole Alvin Caesar Lesmana Ikramsyah; Nazli Ismail; Ibnu Rusydy; Agus Pajrin Jaman
Journal of Aceh Physics Society Volume 7, Number 3, September 2018
Publisher : PSI-Aceh

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Abstract

Telah dilakukan reduksi ke kutub data anomali medan magnetik total untuk mendelineasikan area prospek emas. Intensitas medan magnetik total dikoreksi dengan nilai diurnal dan IGRF untuk mendapatkan anomali medan magnetik total. Reduksi ke kutub anomali medan magnetik total dilakukan untuk menyederhanakan pola kontur anomali di ekuator. Anomali medan magnetik total reduksi ke kutub telah difilter untuk mendapatkan anomali residual yang merefleksikan target benda anomali pada kedalaman yang dangkal. Hasil yang didapat menunjukkan kontur anomali medan magnetik total reduksi ke kutub terlihat lebih sederhana dan mudah untuk diinterpretasi. Aplikasi kedua metode tersebut pada daerah “C” di Jawa Barat telah berhasil diterapkan. Pada low pass filter anomali yang muncul menunjukkan pola smooth yang merupakan efek dari benda anomali regional. Pada anomali residual menunjukkan pola efek dari benda anomali yang dangkal. Nilai anomali medan magnetik total residual yang rendah pada lokasi penelitian diprediksi sebagai tempat terdepositnya emas yang berasosiasi dengan patahan dan zona alterasi yang berada di bagian selatan dan barat lokasi penelitian.Delineation of gold prospecting area based on the total magnetic field anomalies reduction to the pole have been done. The total magnetic field intensity data were corrected by diurnal and IGRF to obtain the total magnetic field anomalies. The total magnetic field values were reduced to the pole to simplify contour shceme in equator and filtered to obtain the residual anomalies which are reflected as shallow depth anomalies. The results showed that the reduction to the pole contour were more simple and easily to be interpreted. Application of both methods in area "C" at West Java Province has been successfully delineating gold deposit in the area. In low pass filter the anomalies showed smooth pattern which are representated as regional effects. The residual anomalies appear as near surface effects. The low magnetic values in the residual data be expected as gold deposit which associated with fault and alteration zones where located in south and west section of the research field. Keywords: magnetic method, the total magnetic field anomalies, reduce to the pole, low pass  filter, gold potential
Analysis of Focal Mechanisms Using Waveform Inversion; Case Study of Pidie Jaya Earthquake December 7, 2016 Qadariyah Qadariah; Andrean VH Simanjuntak; Muksin Umar
Journal of Aceh Physics Society Volume 7, Number 3, September 2018
Publisher : PSI-Aceh

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Abstract

Salah satu gempa bumi yang berdampak pada kerusakan rumah penduduk telah terjadi di Sumatra tepatnya adalah daerah Pidie Jaya pada tanggal 7 Desember 2016, sebesar Mw 6.5. Pada penelitian ini akan dilakukan analisa pada mekanisme fokal gempa bumi menggunakan inversi wavefom dari seismogram digital tiga komponen. Mekanisme fokal gempa bumi dimodelkan dari proses inversi tensor momen menggunakan program ISOLA. Hasil inversi tensor momen menunjukan bahwa gempa bumi Pidie Jaya merupakan gempa bumi dengan mekanisme sesar geser dengan bidang nodal 1; strike 254°, dip 80°, slip 48° dan bidang nodal 2; strike 153°, dip 42°, slip 165°.One of destructive earthquake that occurred in Sumatra region is Pidie Jaya earthquake, on the 7th of December, 2016 with Mw 6,5. The aim of this study is to analyze the focal mechanism using waveform inversion three component digital seismogram. Earthquake focal mechanism is determined by moment tensor inversion method using ISOLA program. Moment tensor inversion results show that the solution of the focal mechanism of the Pidie Jaya earthquake is a strike-slip fault with nodal plane 1; strike 254°, dip 80°, slip 48° and nodal plane 2; strike 153°, dip 42°, slip 165°.Keywords: waveform inversion, earthquake, focal mechanism, strike-slip, Pidie Jaya
Pseudogravity Transformation of Total Magnetic Field Anomaly Data in Bur Ni Geureudong, Bener Meriah Fhelisia Yolanda; Nazli Ismail; Gunawati Gunawati
Journal of Aceh Physics Society Volume 7, Number 3, September 2018
Publisher : PSI-Aceh

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Abstract

Transformasi pseudogravitasi terhadap data anomali medan magnetik total telah dilakukan pada kawasan Bur Ni Geureudong. Data medan magnetik total diukur pada satu lintasan sepanjang 31 km. Anomali medan magnetik total diperoleh setelah koreksi diurnal dan koreksi IGRF terhadap data terukur.  Hasil transformasi menunjukan bahwa variasi data pseudogravitasi sepanjang lintasan sangat berhubungan dengan struktur dan jenis formasi batuan yang dilintasi. Fluktuasi nilai pseudogravitasi di Pante Raya (Lampahan) hingga kaki Bur Ni Geureudong menunjukan adanya koneksi dengan manifestasi panas bumi di kawasan tersebut. Nilai anomali pseudogravitasi rendah berkisar 2,25 mGal hingga 4,20 mGal diperkirakan bahwa daerah tersebut memiliki batuan dengan nilai densitas yang rendah pada formasi Silih Nara (Qvns) dan pada formasi Enang-enang (Qvee). Anomali pseudogravitasi yang melewati kawasan Wih Pesam dan Kompleks Bur Ni Geureudong menunjukkan adanya patahan. Patahan normal tersebut merupakan jalur mengalirnya fluida keluar ke permukaan.Pseudogravity transformation of total magnetic field anomalies data have been done in Bur Ni Geureudong, Bener Meriah, Aceh. The observation area covered along 31 km length of profile. The measured data were corrected by diurnal and IGRF corrections. The pseudogravity anomaly data show some agreements with structures and rock formations faund along the profile. Variations of the pseudogravity data at Pante Raya to Bur Ni Geureudong are connected to geothermal manifestations aroud the areas. Minimum pseudogravity values along the profile are influenced by low density rocks at Silih Nara’s Formation (Qvns) and Enang-enang’s Formation (Qvee). The change of pseudogravity vaules at Wih Pesam and Bur Ni Geuredong areas are cuased by faults. Those normal faults are path of flowing fluid out to the surface.Keywords: Bur Ni Geureudong geothermal field, total magnetic field anomaly, pseudogravity transformation
The Effect of Sintering Temperature and Water Composition in Suspension to the Crystallite Size of Hydroxyapatite Based on Aceh’s Bovine Bone Ireka Salsabila; Irhamni irhamni; Zulkarnanin Djalil
Journal of Aceh Physics Society Volume 7, Number 3, September 2018
Publisher : PSI-Aceh

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Abstract

Telah dilakukan penelitian yang mengkaji tentang pengaruh temperatur sintering dan komposisi air dalam suspensi terhadap ukuran kristal lapisan hidroksiapatit yang disintesis dari tulang sapi lokal Aceh kemudian dicoating pada SS316L menggunakan metode dip-coating. Suspensi dibuat dengan 10 g serbuk hidroksiapatit dan 1 g tepung tapioka yang dicampurkan dengan variasi penambahan komposisi air sebanyak 2, 4, 6, dan 8 g. Untuk mendapatkan suspensi yang stabil, suspensi diaduk menggunakan magnetic stirrer pada putaran 150 rpm selama 20 jam, kemudian dilakukan pencelupan plat stainless steel ke dalam suspensi selama 10 detik sebanyak 1 kali pencelupan. Selanjutnya, hidroksiapatit yang sudah berhasil menempel pada permukaan plat stainless steel dikeringkan menggunakan oven dengan temperatur 110ºC selama 30 menit dan disintering dengan variasi temperatur 500, 600, 700, dan 800ºC selama 1 jam. Plat stainless steel yang sudah dicoating dengan hidroksiapatit dikarakterisasi menggunakan XRD (X-Ray Diffraction) agar dapat dihitung ukuran kristalnya. Berdasarkan hasil pengujian XRD, variasi temperatur sintering dan variasi komposisi air dalam suspensi mempengaruhi nilai ukuran kristal hidroksiapatit, dimana semakin tinggi temperatur sintering dan semakin banyak penambahan komposisi air dalam suspensi, maka ukuran kristal yang dihasilkan semakin besar. The effect of sintering temperature and water compositions into suspense to crystallite size of hydroxyapatite from Aceh’s bovine bone which was coated on 316L stainless steel using a dip-coating method was studied. The suspension is made with 10 g of hydroxyapatite powder and 1 g of tapioca flour mixed with variations in the addition of water composition as much as 2, 4, 6 and 8 g. To get a stable suspension, the suspension is stirred using a magnetic stirrer with a speed of 150 rpm for 20 h. Then dipping the stainless steel plate into suspension for 10 s in one time dipping. Furthermore, hydroxyapatite which has been successfully attached to the surface of the stainless steel plate is dried using an oven with a temperature of 110ºC for 30 min and sintered with temperature variations of 500, 600, 700, and 800ºC for an hours. Stainless steel plates that have been coated with hydroxyapatite are characterized using XRD (X-Ray Diffraction). Based on XRD test results, sintering temperature variations and water compositions into suspense variations affect the hydroxyapatite crystallite size value, where the higher the sintering temperature and the more addition of the water composition in the suspension, the larger the resulting crystal size.Keywords: Aceh’s Bovine Bone, hydroxyapatite, 316L stainless steel, dip-coating, crystallite size 
Analysis of Leachate Delineation of TPA Gampong Jawa Based on 2D Resistivity Modeling Using Geoelectric Method Bella Fitria; Intan Maharani; Lukmannul Lukmannul; Didik Sugiyanto
Journal of Aceh Physics Society Volume 7, Number 3, September 2018
Publisher : PSI-Aceh

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Abstract

Penanggulangan sampah di Indonesia dilakukan secara konvesional, yaitu sampah diletakkan di tempat terbuka yang jauh dari pusat kota dan dibiarkan membusuk dengan sendirinya. Namun penumpukan sampah tersebut dapat mengakibatkan terjadinya rembesan lindi di bawah permukaan yang sangat membahayakan bagi masyarakat di sekitaran Tempat Pembuangan Akhir (TPA). TPA Gampong Jawa adalah salah satu TPA yang menanggulangi sampah secara konvensional, maka dibutuhkan penelitian untuk mengindentifikasi adanya zat lindi di bawah permukaan tanah untuk meminimalisir bahaya bagi masyarakat sekitar TPA. Metode geolistrik merupakan salah satu metode untuk melihat struktur bawah permukaan berdasarkan nilai resistivitas. Penelitian ini dilakukan pada 4 lintasan dengan panjang lintasan disesuaikan berdasarkan kondisi lapangan TPA Gampong Jawa dengan arah lintasan utara – selatan dan barat – timur. Data hasil pengukuran berupa data resistivitas yang kemudian dilakukan permodelan menggunakan software res2Dinv sehingga diperoleh model 2D bawah permukkan daerah penelitian. Hasil interpretasi model menunjukkan pada lintasan 1 diperoleh adanya lindi pada kedalaman 4 hingga 15 m, Lintasan 2 diperoleh dari kedalaman 9 hingga 20 m,. Lintasan 3 diperoleh dari kedalaman 14 hingga 30 m, Sedangkan Lintasan 4 diperoleh dari kedalaman 3 hingga 22,4 m. The produced waste must be managed seriously by the government of Indonesia to prevent the occurrence of environmental pollution. The waste management in Indonesia had been done conventionally, that was, garbage was put in the open place away from downtown and left to rot by itself. However, the accumulation of waste can lead to leach seepage under the surface that is very dangerous for the people around the landfill. TPA Gampong Jawa is one of the landfill that managed waste conventionally, so the research is needed to identify the existence of substance leachate under the surface of the soil to minimize the danger to the community around the landfill. Geoelectric method is one method to see the subsurface structure based on resistivity value. This research was conducted on 4 trajectories with adjustable trajectory length based on field condition of Gampong Jawa landfill with direction of north-south and west-east path. Data measurement resulted in the form of resistivity data which then done modelling using software res2Dinv to obtain 2D model under the surface of research area. The results of the model interpretation showed that leachate exist in trajectory 1 at depth of 4 to 15 m, on trajectory 2, at 9 to 20 m, on the trajectory 3, at 14 to 30 m, while trajectory 4 at 3 to 22.4 m, respectively.Keywords Geoelectric Metdod, Resistivity, 2D Modelling, Leachate, TPA Gampong Jawa
Identify Landslide Areas Using Resistivity Methods Wenner-Schlumberger Configuration in Meunasah Krueng Kala Area, Aceh Besar Intan Maharani; Teuku Arzaqi Ziaul Faresi; Ririn Septian Sari; Didik Sugiyanto
Journal of Aceh Physics Society Volume 7, Number 3, September 2018
Publisher : PSI-Aceh

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Abstract

Kawasan Gunung Kulu Kecamatan Lhoong, Aceh Besar sering terjadi tanah longsor yang dapat menghambat aktifitas masyarakat dengan kerusakan konstruksi jalan pada daerah tersebut. Salah satu upaya yang dapat dilakukan dengan melakukan survey geofisika menggunakan metode geolistrik resistivitas konfigurasi Wenner-Schlumberger. Penelitian ini bertujuan untuk mengetahui struktur bawah permukaan berdasarkan nilai resistivitas yang terukur pada lokasi penlitian. Penelitian dilakukan tepatnya di Desa Meunasah Krueng Kala dengan menggunakan 2 lintasan pengukuran dengan panjang lintasan masing-masing 110 m yang mengarah ke barat dan timur. Data Nilai Resistivitas dimodelkan  menggunakan Softwere RES2DINV untuk mendapatkan penampang 2D. Nilai resistivitas pada lapisan yang diidentifikasi sebagai bidang gelincir berkisar antara 35 – 98 Ω m.Gunung Kulu Area Lhoong Sub-district, Aceh Besar that often causes landslides can hamper community activities and can also impact on road construction damage to the area. One effort can be done by conducting a geophysical survey using the resistivity method of Wenner-Schlumberger configuration. This study aims to determine the subsurface structure based on measured resistivity value at the location of research. The study was conducted in Meunasah Krueng Kala Village on 2 line with a 110 m long line leading west-east. Resistivity Value Data is modeled using Softwere RES2DINV to get a 2D cross-section. The resistivity values in the layers identified as the slip fields range from 35 - 98 Ω m.Keywords: Resistivity, Landslide, Gunung Kulu, Wenner-Schlumberger, Aceh Besar
Thermal Distribution Pattern of Jaboi Geothermal, Sabang with 2D Numerical Approach Nanda Gristina; Muhammad Isa; Muksin Muksin
Journal of Aceh Physics Society Volume 7, Number 3, September 2018
Publisher : PSI-Aceh

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Abstract

Telah dilakukan pemodelan numerik menggunakan teknik beda hingga berdasarkan algoritma Gauss – Seidell. Penelitian ini bertujuan untuk menjelaskan proses transfer panas kasus steady state lapangan geotermal Jaboi, Sabang dengan menggunakan parameter fisis nilai konduktivitas termal material. Teknik ini berfungsi mendapatkan model sebaran suhu kemudian dibandingkan terhadap literatur. Teknik ini sesuai untuk struktur geologi kompleks seperti daerah penelitian. Pengujian sensitivitas sebelum memodelkan daerah geotermal Jaboi dilakukan untuk melihat efek geometri daerah geotermal dengan perubahan parameter masukan nilai konduktivitas dan syarat batas terhadap algoritma numerik yang dipakai. Dari hasil pengujian model sintetis sederhana diketahui bahwa litologi lapisan–lapisan batuan bawah permukaan mempengaruhi pola distribusi temperatur yang dihasilkan. Semakin tinggi konduktivitas termal batuan maka semakin tinggi distribusi temperatur yang akan dihasilkan. Berdasarkan hasil penelitian pola distribusi suhu model geologi daerah Jaboi, diperkirakan lapisan batuan berpotensi sebagai top reservoir berada di kedalaman 1000 m dengan perolehan temperatur sekitar 240oC di kedalaman 1050 m. Hasil perhitungan numerik memperkiraan temperatur maksimum di kedalaman 800 m dan kedalaman 900 m masing–masing sebesar 135oC dan 173oC, mengingat skala model bukan skala peta sebenarnya. Numerical modeling has been done using finite difference techniques based on the Gauss-Seidell algorithm. The purpose of this study was to explain the heat transfer process in the case of the steady state of Jaboi geothermal field, Sabang by using the physical parameters of the material's thermal conductivity value as input. This technique is to obtain a temperature distribution model, then compare it to the literature. This technique is suitable for complex geological structures such as the study area. Sensitivity testing before modeling the Jaboi geothermal area is done to see the geometrical effect of the geothermal area by changing input parameters of conductivity values and boundary conditions. The results of the simple synthetic model testing show that the lithology of the subsurface rock layers affects the temperature distribution pattern produced. The higher the thermal conductivity of the rock, the higher the temperature distribution will be produced. Based on the results of the study of the temperature distribution pattern of the Jaboi regional geological model, it is estimated that the rock layer has the potential as a top reservoir at a depth of 1000 m, with a temperature of around 240oC at a depth of 1050 m. The results of numerical calculations estimate the maximum temperature at a depth of 800 m and a depth of 900 m with respectively 135oC and 173oC, considering the scale of the model is not the actual map scale.Keywords: geothermal, modeling, reservoir, caprock, boundary condition
Mineral Identification of Marble Stones From Gunung Kerambil, South Aceh Using X-ray Diffraction Lindawati Lindawati; Mursal Mursal
Journal of Aceh Physics Society Volume 7, Number 3, September 2018
Publisher : PSI-Aceh

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Abstract

Penelitian ini bertujuan untuk mengetahui kandungan mineral pada batu marmer dari kawasan Gunung Kerambil, Aceh Selatan. Kandungan mineral diidentifikasi menggunakan alat difraksi Sinar-X (XRD) dengan sumber radiasi CuKa dengan panjang gelombang 1.540600 Å. Penentuan kandungan mineral dilakukan berdasarkan puncak difraksi hubungan antara sudut (2θ) dan intensitas (I) difraksi. Berdasarkan hasil analisa data, tiga puncak difraksi tertinggi ditunjukkan pada sudut difraksi (2θ) = 29,5029o; 26,5997o dan 47,5998o dengan Intensitas sebesar 5059, 1283 dan 503. Secara umum, mineral yang diidentifikasi pada batu marmer dari Gunung Kerambil adalah jenis Kalsit (CaCO3). Kandungan mineral dari suatu batuan sangat dipengaruhi oleh formasi geologi kawasan tersebut. The purpose of the study was to determine the mineral content of marble stones from the Gunung Kerambil area, South Aceh. Mineral content was identified using X-Ray Diffraction equipment (XRD) with CuKa radiation with a wavelength of 1.540600 Å. Determination of mineral content is carried out based on the diffraction peaks of the relationship between diffraction angles (2θ) and intensity (I). Based on data analysis, the three highest diffraction peaks were shown at diffraction angles (2θ) of 29.5029o; 26.5997o and 47.5998o with Intensity (I) of 5059, 1283 and 503, respectively. In general, the minerals identified in marble sample from Gunung Kerambil were Calcite (CaCO3). Mineral content of a rock is strongly influenced by the geological formation of the region.  Keywords: Mineral, Batu Marmer, XRD, Gunung Kerambil, Aceh Selatan

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