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Indonesian Journal of Physics (IJP)

ijp
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Published by Institut Teknologi Bandung

ISSN : 23018151 EISSN : 29870828 DOI : https://doi.org/10.5614/itb.ijp

Core Subject : Science, Engineering,

Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering

Indonesian Journal of Physics welcomes full research articles in the area of Sciences and Engineering from the following subject areas: Physics, Mathematics, Astronomy, Mechanical Engineering, Civil and Structural Engineering, Chemical Engineering, Electrical Engineering, Geotechnical Engineering, Engineering Science, Environmental Science, Materials Science, and Earth-Surface Processes. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere.

Arjuna Subject : Fisika dan Astronomi - Fisika Nuklir dan Molekuler, dan Ooptik

Articles 334 Documents

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Source Term Calculation of Small Pb-Bi Cooled Non-Refueling Nuclear Power Reactor 20 MWe (SPINNOR 20MWe) Imron Imron; Zaki Su’ud; Ari Darmawan Pasek
Indonesian Journal of Physics Vol 21 No 2 (2010): Vol. 21 No. 2, April 2010
Publisher : Institut Teknologi Bandung

Source term calculation of small Pb-Bi cooled, 15 years non-refueling nuclear reactor 20 MWe (SPINNOR 20MWe) has been performed. The study is limited on activity, toxicity, thyroid and whole body dose. The reactor has an average power density of 187 watt/cm3 with near zero postulated accident propability. The LOCA probability less than that of PWR type because of low pressure condition in the Reactor vessel. The coolant freezing in room temperature can protect nuclide from escaping. Antisipated accident by design capable to protect reactor from unprotected transient over power and unprotected loss of flow accident without scram. In hipotetik scenario accident, there is a sabotage in vessel and core melt when cooling system is lost. Core inventory factor on final cycle is 3,69E+9 Ci/MWth. Except elemental iodine and noble gas, all radionuclides were traped in containment. The source term in containmen 1,8 h after accident for Noble Gas group is 2,38E+09 Ci, Halogen group is 5,12E+08 Ci, Alkali metal group is 3,04E+08 Ci, Tellerium group is 3,99E+07 Ci, BaSr group is 6,80E+07 Ci, Noble Metal group is 2,91E+06 Ci, Lanthanide group is 1,72E+06 Ci, Cerium group is 8,12E+07 Ci. Np-237 is the longest for clearance time about 16.500 years, the most toxic is Xe-138 with α/D reach 7,38E+19. The Source term is used for estimate thyroid dose, in EPZ is 0.89 rem and in LPZ is 0.055 rem below limit constrain PWR 180 rem and 130 rem. The whole body dose in EPZ and LPZ is 0,00132 rem dan 0.000269 rem with PWR Standard 9,74 rem dan 8,54 rem. Based on acceptece criteria of PWR type, the safety requirement of SPINNOR 20MWe is achieved.

A Numerical Modeling of Formation of Volcanic Geothermal Reservoir Alamta Singarimbun
Indonesian Journal of Physics Vol 21 No 3 (2010): Vol. 21 No. 3, July 2010
Publisher : Institut Teknologi Bandung

The aim of the research is to develope the thermal energy from volcanic geothermal reservoir. One of the prospec of the geothermal energy for the future is the utilization of volcanic geothermal reservoir. The using of numerica simulation is important to clarify the thermal processes in a fluid reservoir beneath an active volcano. The fluid reservoir is a permeable zone, where the magmatic water discharged from magma mixes with the downgoing meteoric water. The flow rate of magmatic water becomes the mass and energy input to the reservoir. Finally, the fluid go to the earth’s surface as vapor and liquid. The main physical parameters of the fluid reservoir cover pressure, temperature, enthalpy and enthalpy. The Finite Difference Method based on mass and heat balance equations is used to obtain these parameters. The parameters reperesent the thermal state of the fluid in the reservoir. The fluid phase in the reservoir changes with time. These processes interpret the development of the energy in a geothermal reservoir.

Three Components Seismogram Analysis of Tasikmalaya, Indonesia on September 2nd 2009 Earthquake to Investigate the Coulomb Stress Change and Seismicity Rate Change Madlazim Madlazim; Bagus Jaya Santosa; Widya Utama
Indonesian Journal of Physics Vol 21 No 3 (2010): Vol. 21 No. 3, July 2010
Publisher : Institut Teknologi Bandung

During the past decade remarkable progress has been made in studies related to fault interactions and how the occurrence of an earthquake perturbs the stress field in its neighbourhood, which may trigger aftershocks and seismicity rate change. An earthquake event in Tasikmalaya, Indonesia on September 2nd, 2009 at 07:55:02.5 UTC (Universal Time Coordinate), has been investigated to estimate source parameters of the earthquake. Seismogram data was taken from five stations in the vicinity of the epicenter, which have distances less than 15º. All data analyzed are waveforms of three components. Method to estimate the source parameters is combination between iterative deconvolution and discrete wave number (DWN) for local data. The results show that variance reduction between the observed seismogram and the synthetic one and reduced variances for all stations is 61.66%. It indicates that results of the estimation (hypocenter, moment seismic, moment tensor and rupture direction) are suitable to describe source earthquake point. The source parameters of this event are hypocenter (-7.84ο, 107.84ο, 55 km), moment seismic is 4.001e+19 Nm, moment tensor and rupture direction that can describe the focal mechanism of the earthquake. By trial and error we find that a rupture area of 27.20 km x 15.5 km having updip and downdip edges at depths of 0 and 11.7 km respectively, provides a good correlation between zone of increasing Coulomb stress, the three aftershocks hypocentres and zone of increasing seimicity rate.

Comparative Study on 233U and Plutonium Utilization in Molten Salt Reactor Abdul Waris; Indarta Kuncoro Aji; Yanti Yulianti; Muhamad Ali Shafii; Imam Taufiq; Zaki Su'ud
Indonesian Journal of Physics Vol 21 No 3 (2010): Vol. 21 No. 3, July 2010
Publisher : Institut Teknologi Bandung

A comparative study on 233U and Pu utilization in a molten salt reactor (MSR) FUJI-12 has been conducted. Originally, FUJI-12 uses LiF , BeF2 , ThF4 and 233UF4 as fuel. In this study, we have evaluated the use of reactor grade plutonium and weapon grade plutonium beside 233U as the fuel of reactor. The need of 233U concentration for criticality is about 0.34%. In contrast, the demand of the reactor grade plutonium and the weapon grade plutonium fractions for criticality is around 3.0% and 0.96%, correspondingly. The neutron flux in the thermal energy region for 233U fuel case is higher than in Pu fuel cases due to larger value of the average number of neutrons produced per neutron absorbed in 233U fuel than that of 239Pu fuel, and may also because of the hardening of the neutron spectrum owing to plutonium utilization in thermal reactor.

Application of Hybrid Polymer as Laser Devices Based on 2D Grating with Square Structure Sahrul Hidayat; Fitrilawati Fitrilawati; Ayi Bahtiar; Rustam Eefendi Siregar; Rahmat Hidayat; M Ozaki
Indonesian Journal of Physics Vol 21 No 3 (2010): Vol. 21 No. 3, July 2010
Publisher : Institut Teknologi Bandung

Two dimensional gratings have been fabricated by laser interference method on hybrid polymer films doped with 4-dicyanmethylene-2-methyl-6-(p-dimethyl-aminostyryl)-4H-Pyran (DCM). The gel precursor of hybrid polymer was synthesized by sol-gel route using 3-(trimethoxysilyl)-propyl-methacrylate (TMSPMA). The film was exposed by laser interference of Nd-YAG laser yield square lattice of 2D-grating with periodicities 391 nm and 405 nm. The characteristic of lasing was investigated using strip-line excitation light of second harmonic generation (SHG) of Nd-YAG laser (λ = 532 nm). The lasing wavelengths are observed at (588 nm ± 2) and (606 nm ± 2 nm) for grating period of 391 nm and 405 nm, respectively. The spectral width of lasing is about 2 nm at pumping power 6.6 mJ/pulse.cm2.

Source Term Analysis of Small Long-Life without Refueling 420 MWt PWR during Loss of Coolant Accident (LOCA) M. I. A. Abidin; Zaki Su'ud; Ari Darmawan Pasek
Indonesian Journal of Physics Vol 21 No 3 (2010): Vol. 21 No. 3, July 2010
Publisher : Institut Teknologi Bandung

Source term analysis of a small long-life 420 MWt PWR has been performed. The analysis includes calculation of fission products inventory in the core, the core activity, source term activity and toxicity, and also dose calculation on various situations during LOCA. Diffussion calculation conducted during the Beginning of Life (BOL) of the reactor. LOCA scheme calculated when the reactor has been operated for 10080 full power days. Fission products activities in the core have a total of 3.2E+08 Ci. Fission product activity that are released to the environment with assumption that 100% of noble gas, 50% of halogens and 1% of other source term groups are released resulting in a total activity of 6.71E+05 Ci, or about 0.21% of total activity in the core. Toxicity analysis show that there are 200 nuclides released to the atmosphere categorized as dangerous. Calculation of thyroid dose in the boundary of exclusion zone (350 m) gives result of 0.57593 rem, while in low population zone resulted in 0.23013 rem. Whole body dose calculation in exclusion zone resulted in 0.14583 rem and in low population zone, the whole body dose is 0.05107 rem.

Attenuation Losses Due to Changes in Curvature, Temperature, and Pressure in Optical Fiber Cables Gwaro J.O; Maweu O.M; Kirui M.S.K
Indonesian Journal of Physics Vol 21 No 4 (2010): Vol. 21 No. 4, October 2010
Publisher : Institut Teknologi Bandung

In this paper, the attenuation losses due to changes in curvature, temperature, and pressure in optical fiber cables are investigated. A single mode optical fiber cable was subjected to curvature of radii 5mm, 10mm, 20mm, 30mm, 40mm and 50mm. An optical signal from a CW laser emitting beams in the range of 800nm-880nm was transmitted through the cable. Transmission percentage and variation in peaks were noted using an Optical Spectrum Analyzer and graphs plotted corresponding to each curvature radius. The single mode optical fiber cable was placed on thermal chamber where temperature was regulated .The range of temperatures considered corresponded to the ones of Nakuru area with changes in the order of 13oC, 20oC, 25oC, 30oC, 35oC and 40oC. Optical signal from CW laser emitting wavelength radiation in the range 800-880nm was transmitted over the optical fiber. Various transmission graphs were plotted for each temperature change. Similarly, the single mode optical fiber cable was subjected to pressure using various masses in the range of 1kg, 2kg, 3kg, 4kg, 5kg and 6kg. The masses exerted stress on the cable. The optical signal from the CW laser was transmitted and its transmission quality analyzed. Various transmission graphs were plotted for each pressure exerted. Transmission percentage was found to be proportional to the size of the curvature. It was observed that as the curvature reduces there is a reduction in transmission percentage definitely attenuation loss. Transmission percentage and the nature of peaks were noted for each temperature. Transmission percentage and the nature of peaks changed according to the weight applied. This study showed that increased pressure resulted to increased attenuation which resulted to minimal or no signal transmission

Left-Right Model of Electroweak Interaction with One Bidoublet and One Doublet Higgs Fields Asan Damanik
Indonesian Journal of Physics Vol 21 No 4 (2010): Vol. 21 No. 4, October 2010
Publisher : Institut Teknologi Bandung

We study the predictions of the left-right model of electroweak interaction based on SU(2)L ⊗ SU(2)R ⊗ U(1) gauge group by using one bidoublet and one doublet Higgs fields. By choosing appropriate vacuum expectation values of Higgs fields, the low energy phenomenology of electroweak interaction can be understood. Leptons can acquire a mass via two scenarios, first via a Higgs mechanism with non-zero 'hypercharge-like' I in the Lagrangian density mass terms with the Yukawa couplings G1 >> G1* , and the second via a Higgs mechanism followed by a seesaw-like mechanism without the requirement that G1 >> G1*

Seismic Moment Tensors of Padang 20090930 and Jambi 20091001 Events in Jambi using Three Component Local Waveforms: Identification of the Active Fault Plane Madlazim Madlazim; Bagus Jaya Santosa; Widya Utama
Indonesian Journal of Physics Vol 21 No 4 (2010): Vol. 21 No. 4, October 2010
Publisher : Institut Teknologi Bandung

A research has been conducted to estimate earthquake source parameters occurred on 30/09/2009 with 7.5 moment magnitude and 01/10/2009 with 6.4 moment magnitude. The event on 30/09/2009 was occurred in the sea and triggered by a mechanism related to subduction plane, while the one in 01/10/2009 occurred in the ground and triggered by the activity of Semangko Fault. The data used to determine the parameters of both earthquake source are three component local waveforms that are recorded by three MY broadband stations which belong to IRIS/Malaysia (IPM, KOM and KUM) and IRIS/Singapore MS network broadband station (BTDF). Availability of the three component local waveforms data is an opportunity to conduct a detailed research for earthquake source parameters in this area. In this paper, we report a focal mechanism of both events using Discrete Wave Number method to calculate the Green function and deconvolution iteration method to invert the tensor moment from three component local waveforms. Both methods are integrated in ISOLA_GUI software. The data is inverted at 35 mHz until 70 mHz to obtain the earthquake source parameters. Source parameters of both earthquakes (seismic moment, moment magnitude, orientation and fault plane and slip length) were extracted after double couple (DC) value were obtained and the reduction variant of each events are 99.3% and 70% and also 95.3% and 73%, respectively. To identify the fault plane, the HC-plot method is used, and to determine the length and width of the fault plane and also the slip length, an empirical equation is implemented in the Coulomb software. From the analysis, we obtain the type of fault for both earthquakes having strike, dip and rake angles that represent the fault plane orientation for both faults which are 88°, 70°, 146° and 149°, 49°, and -176°. The length and width of the fault and the slip length of both events are 124 km; 33.8 km; right lateral = 1.3 m and reverse slip = 0.88 m and also 22.68 km; 10.96 km; right lateral = 0.59 m and reverse slip = -0.04 m, respectively.

Analysis of Forward Anti-Plane Elastodynamic Problem in an Infinite Medium using Boundary Integral Equation Method Neny Kurniasih
Indonesian Journal of Physics Vol 21 No 4 (2010): Vol. 21 No. 4, October 2010
Publisher : Institut Teknologi Bandung

The anti-plane elastodynamic problem could be governed mathematically and expressed by the linear second-order partial differential equation. With the aid of the dynamic reciprocal theorem, the differential equation is transformed into an equivalence integral one. The evaluation of singular integral is performed analytically while the nonsingular one is calculated numerically using the standard Gaussian quadrature. As numerical implementations, boundary solutions are investigated for an infinitely long cavity with various cross sections due to various angles of incident wave. The method is applied for various spatial and time elements.

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Prodi Sarjana dan Pascasarjana Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Institut Teknologi Bandung Gedung Fisika, Jalan Ganesa 10, Bandung 40132, INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Asril Pramutadi Andi Mustari

Contact Email IJPhysicsITB@gmail.com

Phone +6222-2500834

Journal Mail Official ijp-journal@itb.ac.id

Editorial Address Prodi Sarjana dan Pascasarjana Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Institut Teknologi Bandung Gedung Fisika, Jalan Ganesa 10, Bandung 40132, INDONESIA

Location Kota bandung, Jawa barat INDONESIA

Abstract

Abstract

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Contact Name
Asril Pramutadi Andi Mustari

Contact Email
IJPhysicsITB@gmail.com

Phone
+6222-2500834

Journal Mail Official
ijp-journal@itb.ac.id

Editorial Address
Prodi Sarjana dan Pascasarjana Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Institut Teknologi Bandung Gedung Fisika, Jalan Ganesa 10, Bandung 40132, INDONESIA

Location
Kota bandung,

Jawa barat

INDONESIA