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INDONESIA
Indonesian Physical Review
Published by Universitas Mataram
ISSN : 26151278     EISSN : 26147904     DOI : -
Core Subject : Science, Education,
Education Physics
Indonesian Physical Review is a peer review journal which is managed and published by Physics Departement, Faculty of Mathematics and Natural Sciences, Universitas Mataram. This journal is published periodically three times a year, in January, May and September. IPR is Open Accsess for all readers and includes research developments in physics both experimentally and analytically. Focus and scope include Theoritical Physics, Computation, Material sciences, Instrumentation, Biophysics, Geophysics, and Optics.
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Search results for , issue "Vol. 3 No. 2 (2020)" : 5 Documents clear
ZONASI SITE EFFECT DAN ANALISIS BAHAYA PENGUATAN GEMPA MENGGUNAKAN METODE DSHA UNTUK MENENTUKAN PGA DI KABUPATEN SUMBA BARAT DAYA Soulthan Salahudin Al Ayubi; Karyanto Karyanto; Nandi Haerudin; Syamsurijal Rasimeng; Rahmat C Wibowo
Indonesian Physical Review Vol. 3 No. 2 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1549.687 KB) | DOI: 10.29303/ipr.v3i2.44

Abstract

Southwest Sumba Regency is located in the Banda Arc area. Its position which is very close to the subduction area in the south of Indonesia caused a lot of tectonic activity and earthquake hazard. The arrangement of alluvium, coral, and thick deposits on the island of Sumba makes it prone to earthquake strengthening. Zoning of soil characters using site effects and DSHA method was carried out to determine the danger level of strengthening the Southwest Sumba Regency. Zoning of the site effect soil character uses microtremor data which is correlated with seismic hazard analysis to obtain the PGA values on bedrock and ground surface using the closest earthquake source. The area is dominated by Class 2 and 3 lands (f0 worth 1.333 - 5 Hz) according to the Kanai Classification (1983), with an amplification predominance of 3.8-8.3 times. This indicates that the research area is dominated by thick sediment deposits. The PGA value obtained from the DSHA method is known that Southwest Sumba Regency has a PGA soil of 0.075-0.19 g and a bedrock PGA of 0.067-0.085 g using earthquake record data in Sumba Subduction and Timor Subduction. With PGA estimation, it is known that the level of earthquake disaster vulnerability is high, located in the south of Southwest Sumba Regency which is suspected to be composed of thick sediments and close to the Sumba Subduction and Timor Subduction.Keywords: Site effect, predominant frequency, amplification, earthquake, DSHA, PGA
ANALISIS KETEBALAN LAPISAN BATUAPUNG FUNGSI JARAK DARI SUMBER MENGGUNAKAN METODE GEOLISTRIK RESISTIVITAS DI KECAMATAN LINGSAR, LOMBOK BARAT Yuyun Ustina; Bakti Sukrisna; Hiden Hiden
Indonesian Physical Review Vol. 3 No. 2 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (868.016 KB) | DOI: 10.29303/ipr.v3i2.41

Abstract

Letusan Gunungapi Samalas 1257 menghasilkan piroklastik seperti batuapung yang tersebar merata di sekitarnya. Salah satu daerah yang terkena dampak erupsi tersebut adalah Kecamatan Lingsar Kabupaten Lombok Barat. Penelitian ini bertujuan untuk mengetahui struktur resistivitas, ketebalan lapisan batuapung, dan analisa ketebalan terhadap jarak sumber di Kecamatan Lingsar Kabupaten Lombok Barat. Metode yang digunakan yaitu metode geolistrik resistivitas dan pengukuran nilai resistivitas batuan di Laboratorium. Hasil penelitian menunjukan lapisan batuapung dengan kedalaman (0.00 - 21.00) meter dengan ketebalan rata-rata (10.00 to 21.00) meter. Sementara hasil pengukuran Laboratorium menunjukan nilai resistivitas batuapung basah yaitu (23.9 - 40.0) Ohm-m dan (204.3 - 354.8) Ohm-m untuk batuapung kering. Ketebalan lapisan batuapung menipis secara eksponensial terhadap jarak dari sumber letusan. Penelitian selanjutnya, analisa volume tefra dan dinamika terjadinya letusan. 
ANALISA KANDUNGAN Fe DAN KARAKTERISTIK SIFAT LISTRIK PASIR BESI PANTAI TELINDUNG YANG DISINTESIS DENGAN BEBERAPA METODE Lalu A. Didik; Muh. Wahyudi
Indonesian Physical Review Vol. 3 No. 2 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (600.751 KB) | DOI: 10.29303/ipr.v3i2.58

Abstract

Telah dilakukan sintesis pasir besi berbasis pasir besi Pantai Telindung dengan menggunakan metode solid state reaction (SSR) dan copresipitasi. Sampel kemudian dikarakterisasi ukuran partikelnya menggunakan Pastikel Size Analyzer (PSA) dan konsentrasi Fe diukur menggunakan Atomic Absorption Spectroscopy (AAS). Karakterisasi sifat listrik meliputi konstanta dilektrik dan resistivitas. Konstanta dielektrik diukur menggunakan metode plat sejajar sedangkan resistivitas diukur menggunakan metode 2 titik probe. Ukuran partikel sampel yang disintesis dengan menggunakan metode SSR masih dalam ukuran micrometer yaitu sebesar 1,34 µm sedangkan ukuran partikel dengan menggunakan metode copresipitasi sudah mendekati ukuran nanometer yaitu sebesar 210 nanometer. Konsentrasi Fe dalam sampel sebesar 8,7 ppm pada sampel yang disintesis dengan menggunakan metode metode SSR sedangkan konsentrasi Fe pada sampel yang disintesis dengan menggunakan metode copresipitasi sebesar 12,9 ppm. Nilai konstanta dielektrik sampel yang disintesis dengan metode SSR sebesar 9,41 nilai konstanta dielektrik sampel yang disintesis dengan metode copresipitasi yaitu sebesar 14,22. Nilai resistivitas juga memiliki pola yang sama dengan konstanta dielektrik dimana nilai resistivitas sampel yang disintesis dengan metode SSR sebesar 0,078 Ωm. Sedangkan nilai resistivitas sampel yang disintesis dengan menggunakan metode copresipitasi sebesar 0,092 Ωm.
IDENTIFIKASI ORIENTASI REKAHAN MIKRO AREA PANAS BUMI MONTE AMIATA BERDASARKAN ANALISIS STUDI SHEAR WAVE SPLITTING Irfan - Hanif; Ahmad Zaenudin; Nandi Haerudin; Rahmat C Wibowo
Indonesian Physical Review Vol. 3 No. 2 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1021.678 KB) | DOI: 10.29303/ipr.v3i2.56

Abstract

Shear Wave Splitting is an application of seismic wave to analyse the anisotropy level of a certain medium. Generally, shear wave propagation through a rock formation will be polarized (φ) into two parts especially when the medium structures are different, such as fracture. The polarized shear wave which is perpendicular to fracture will propagate slower than the wave that propagates parallel to the fracture. The delay time (δt) of both wave is proportional with the fracture intensity along the wave propagation from the source to the station. The description regarding fracture orientation can be obtained by analysing both Shear Wave Splitting parameters (φ and δt), and this information is adequately important in geothermal exploration or exploitation phase at Mt. Amiata. Based on the result of this research, the micro earthquake source is focused on the east to the south area and spread along 3 earthquake stations. The existence of micro earthquake source is mainly focused at the depth of 1 to 4 km. In addition, the polarization direction of each earthquake station at the geological map shows a dominant fracture orientation consistently at NW-SE. All of the three stations also show that the polarization direction is integrated to the local fault existence in the subsurface. Furthermore, the research shows that the high intensity fracture distribution occurred at MCIV station area in the southern part of research location. Meanwhile, the low intensity fracture distribution occurred at ARCI and SACS station area in the western and the eastern part of research location. The high value of fracture intensity accompanied by the high amount of structure intensity, strengthen the prediction of the high anisotropy existence which potentially tends to the high permeability presence at the area.Keywords: shear wave splitting, anisotropy, fracture, geothermal, polarization direction, fracture intensity.
ANALISA KURVA PDD DAN PROFILE DOSE BERKAS ELEKTRON PESAWAT LINAC VARIAN CLINAC CX Huswatun Hasanah; Nurul Qomariyah; I Wayan Ari Makmur; Rinarto Subroto; Rahadi Wirawan
Indonesian Physical Review Vol. 3 No. 2 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (716.877 KB) | DOI: 10.29303/ipr.v3i2.43

Abstract

Linac (linear Accelerator) is a radiotherapy device that utilizes radiation to kill cancer cells. Every radioterap equipment such as Linac aircraft must be calibrated periodically. One of them is monthly quality control which aims to test the performance of Linac so that the quality of the output of the radiation beam can be guaranteed. Quality control conducted is the measurement of Percentage Depth Dose (PDD) and Profile Dose. In PDD measurements, the Linac Variant Clinac CX electron beam (4, 6, 9, 12, and 15) MeV planes are used with a radiation field of 15 × 15 cm2. While the profile dose is measured in the radiation field 10 × 10 cm2 and 25 × 25 cm2 and using blue phantom, (referenc and field) detectors are equipped with computer control units (CCU) and carried out for crossline and inline directions at Dmax depth and certain depth with SSD 100 cm. The measurement results show the greater the electron energy used, the maximum dose (Dmax) obtained is getting smaller, conversely the greater the electron energy used, the greater the depth for the maximum dose. And the measurement results still meet the tolerance measurement that is ± 0.2. While the results of the Dose Profile measurements show a field area of 25 × 25 cm2 more flatness and symmetry than a 10 × 10 cm2 field area both inline and crosline directions and still meet measurement tolerances of ± 4.5% - ± 7% for flatness and ± 2 % for symmetry.

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