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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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CCD Photometry of Comet 73P/Schwassmann-Wachmann 3 during Its 2006 Apparition Observed from the Bosscha Observatory Budi Dermawan; P. Mahasena; Taufiq Hidayat; D. Mandey; Muhamad Irfan
Indonesian Journal of Physics Vol 22 No 4 (2011): Vol. 22 No. 4, October 2011
Publisher : Institut Teknologi Bandung

On 9-10 May 2006 UT comet 73P/Schwassmann-Wachmann 3 (73P/SW3) passed 0.093 AU from the Earth, being slightly farther away than its discovery on 1930. Interestingly, it has been reported since 1995 that the comet has been breaking up to many components during its trajectory orbiting the Sun with a period of 5.4 years. Here we report our CCD photometric observations of major components B and C during its 2006 apparition. Successful observations were done on 12-14 May 2006 UT at the Bosscha Observatory, Lembang. Since comet is a moving object, we carried out stacking techniques to combine our images in order to strengthen the signal-to-noise ratio. Our investigations to their surface brightness show that the coma of 73P/SW3 was not in a steady state. Under assumption of a steady state coma, the dust production rate of the component is found to be 24.7 cm and the mass-loss rate of 4.94 kg s-1

A Model Calculation of Temperature and Size Dependent Thermoluminescence Intensity from Silicon Nanostructures Nebiyu Gemechu Debelo
Indonesian Journal of Physics Vol 22 No 4 (2011): Vol. 22 No. 4, October 2011
Publisher : Institut Teknologi Bandung

Thermoluminescence (TL) from silicon nanostructures has received considerable attention in recent years. Despite of some theoretical and experimental investigation, the origin and mechanism of TL is not clearly understood. Most of the bulk materials start showing fascinating behaviors as their size is reduced to nano level. The ability to emit light as a consequence of absorption of energy (luminescence) is one of these exotic behaviors. TL is the thermally stimulated emission of light due to absorption of energy from radiation. So, there is a direct relationship between temperature (due to absorption of heat or radiation) and the TL intensity. Starting from the concept of bulk material, we derive the mathematical expression for the temperature and size dependent TL intensity using model calculation. We specifically calculate the TL intensity as a function of temperature and nanoparticle size.

Transport and AC Impedance Studies of Plasticized-Chitosan Based Polymer Electrolytes A.S.A Khiar; A.K. Arof
Indonesian Journal of Physics Vol 22 No 4 (2011): Vol. 22 No. 4, October 2011
Publisher : Institut Teknologi Bandung

Dimethyl Carbonate (DMC)-plasticized chitosan-based polymer electrolytes were prepared in the present work. The sample 37.5 wt% chitosan - 37.5 wt% NH4CF3SO3 - 25 wt% DMC showed the highest conductivity of (1.95±0.15) x 10-6 S/cm. From calculated values obtained using the Rice and Roth model, the increase in conductivity is due to the increase in the number density of mobile ions. Universal Power Law was used to analyze the AC conductivity of the sample. Arrhenius behavior was observed in the plot of hopping frequency; ωP against temperature. The AC conductivity master curve was obtained for the highest conducting sample when scaled vertically by σ and horizontally by ω .

Design Study of Thorium Cycle Based Long Life Modular Boiling Water Reactors Nuri Trianti; Zaki Su’ud; Eka Sapta Riyana
Indonesian Journal of Physics Vol 22 No 4 (2011): Vol. 22 No. 4, October 2011
Publisher : Institut Teknologi Bandung

Design study of long life (cycle) Boiling Water Reactor, which can be operated for 20-30 years of operation time without the necessity of refuelling during that period, has been performed. In shown in the previous study Th232-U233 cycle based fuel has potential for longer operation time in the thermal reactor domain. To increase reactor operation time and minimize excess-reactivity burnable poison may be used. Protactinium (Pa-231), Np-238, or gadolinium has good properties for such purpose. Here based on the previous study we select Protactinium and Gadolinium poisons to be used in the present study. Optimizations the content of 231Pa in the core enables the BWR core to sustain enough reactivity for long period of time with reasonable burn-up reactivity swing. Based on the optimization of fuel element composition (Th and Pa) in various moderation compositions can be achieved reactor core with longer operation time, 20 ~ 30 years operation without fuel shuffling or refuelling. Similarly Gadolinium has been successfully used to extend refuelling time and reduce excess reactivity during burnup period for both oxide fuel and nitride fuel.

Landslide Dynamics and Determination Critical Condition Using of Resistivity Method in Desa Negeri Lima Ambon Matheus Souisa; Lilik Hendrajaya; Gunawan Handayani
Indonesian Journal of Physics Vol 26 No 1 (2015): Vol. 26 No. 1, July 2015
Publisher : Institut Teknologi Bandung

Ambon Island is a volcanic island arc and included in the territory of the archipelago of small islands are associated with subduction zones that have a high degree of vulnerability to natural disasters, such as erosion and landslides on a particular slope conditions. This study aims to determine the dynamics of avalanches below the surface in the area of the landslide and determine the position of the gelincirnya. The study area in the mountains of Ulak Hatu Negeri Lima Ambon. Research using geoelectric of resistivity with Wenner-Schlumberger configuration. Geoelectric interpretation results correlated with the drill data to obtain landslide field located at a depth of approximately 5 m - 30 m and lithology dominated by low resistivity values with the structure of a layer of clay mixed with layers of weathered rock and clay layer with water saturated. Both of these layers contact each other and form the slope of the ground, causing the potential for critical slip thereon and allows the subsequent landslides. Critical location landslide direction of the obliquity of the avalanche that is, toward the cliff and the geometry of the type of debris avalanches of rocks and debris flow. Estimation of landslides occur in addition to the local geological conditions, but strongly influenced by rainfall reached 335.0 mm, earthquakes and coupled with a slope of 119.0%.

Development of the Thermoacoustic Refrigerator System Using a Stack made of some Stainless Steel Mesh and a Hot Heat Exchanger Haris S Dyatmika; Wahyu Nur Achmadin; Prastowo Murti; I. Setiawan; Agung B S Utomo
Indonesian Journal of Physics Vol 26 No 1 (2015): Vol. 26 No. 1, July 2015
Publisher : Institut Teknologi Bandung

In order to develop and increase the performance of a thermoacoustic refrigerator system, a research has been conducted. In this research a PVC cylindrical pipe (diameter of 5.5 cm and length of 80 cm) as a tube resonator, a loudspeaker as a sound source, some stainless steel mesh as a stack and a hot heat exchanger were arranged to be a thermoacoustic refrigerator system. The results show the influence of cooling power by utilizing some stainless steel mesh stack, the power of the utilized sound, and a hot heat exchanger on the performance of the thermoacoustic system. We expected to construct a thermoacoustic refrigerator system, which has an optimally performance, by using some stainless stell mesh as stack and a hot heat exchanger.

Filter Design on Discrete-Time Neutral System Using Guaranteed Cost Method Erwin Susanto; Ig. Prasetya Dwi Wibawa; Junartho Halomoan
Indonesian Journal of Physics Vol 26 No 1 (2015): Vol. 26 No. 1, July 2015
Publisher : Institut Teknologi Bandung

This paper will discuss about our study in filter design on discrete-time neutral system using guaranteed cost method. This design filter method yields a robust filter and the derivation of its equation can be obtained by using LMI (linear matrix inequalities).

The Interdiffusion Modeling of Aluminide Coated Ti-47Al-2Cr-2Nb-0.5Zr-0.5Y Intermetallic Alloy F. Muhammad; E. A. Basuki; M. I. Juliansyah
Indonesian Journal of Physics Vol 26 No 1 (2015): Vol. 26 No. 1, July 2015
Publisher : Institut Teknologi Bandung

In the present study, the interdiffusion behavior between coating layer and substrate of aluminide coated Ti- 47Al-2Cr-2Nb-0.5Zr-0.5Y intermetallic alloy were investigated at 800°C, 900°C, and 1000°C under argon atmosphere (closed system). The pack cementation, consists of 20%-wt. Al, 2%-wt. NH4Cl, and 78%-wt. Al2O3, was carried out at 900°C for 10 hours. The phases in the coatings, interdiffusion layer, and substrate were examined using optical microscope and scanning electron microscope (SEM) while the chemical composition were examined by Energy Dispersive X-Ray Spectroscopy (EDS) attached on the SEM. The interdiffusion coefficients were calculated according to Boltzmann-Matano method using the data obtained from EDS analyses. The calculated interdiffusion coefficients are 7.091 x 10-14, 1.650 x 10-12, and 5.261 x 10-12 cm2/s respectively for 800°C, 900°C, and 1000°C. The analytical and numerical method to predict the concentration profiles between coating layer, interdiffusion layer, and substrate. A reasonable agreement has been achieved between the experimental results and the simulated concentration profiles at every temperatures.

Two-Dimensional Steady Flow Modeling of Ideal Fluid in Porous Medium Using Finite Element Method Hairil Anwar; Wahyu Srigutomo
Indonesian Journal of Physics Vol 26 No 1 (2015): Vol. 26 No. 1, July 2015
Publisher : Institut Teknologi Bandung

Ideal fluid is a fluid which is uncompressed and has no viscosity. A steady stream of ideal fluid in a porous medium can be modeled using finite element method. The finite element method is a numerical method that can be used to solve boundary-value problem governed by a differential equation and a set of boundary conditions. In this modeling, the linear system of equations derived using Galerkin approach for linear triangular elements. Irregular geometry and variation in permeability distribution models are used. The solution obtained in form of fluid head and fluid flow velocity distribution in the modeling domain.

Optimization of Small Pb-Bi Cooled Modified CANDLE Burnup based Long Life Fast Reactors Zaki Su'ud; Nur Asiah Aprianti; Rida Siti NM; Hiroshi Sekimoto
Indonesian Journal of Physics Vol 23 No 1 (2012): Vol. 23 No. 1, July 2012
Publisher : Institut Teknologi Bandung

In this study optimization of modified CANDLE burnup scheme based long life Pb-Bi Cooled Fast Reactors with natural Uranium as Fuel Cycle Input for small long life reactors has been performed. In this design the reactor cores are subdivided into several parts with the same volume in the axial directions. The natural uranium is initially put in region 1, after one cycle of 10 years of burn-up it is shifted to region 2 and the region 1 is filled by fresh natural uranium fuel. This concept is basically applied to all regions, i.e. shifted the core of I’th region into I+1 region after the end of 10 years burn-up cycle. In this paper we discuss the characteristics of several designs of small long life Pb-Bi cooled fast reactors with modified CANDLE burn-up scheme. Four power levels of 250MWt, 400MWt, 600MWt, and 800MWt were investigated. For 250MWt and 400MWt cores we employed 67.5% high fuel volume fraction nitride fuels with large pin diameter of 1.35 cm while for 600and 800MWt cores we employed 60% fuel volume fraction nitride fuel with 1.2 cm pin diameter. The results show that all cores show similar trend in k-eff pattern change, k-inf pattern change, conversion ratio pattern change, and U-238 and Pu-239 atomic density pattern changes. Maximum discharged burn-up is in the range of 26-33%HM, while peak power density is in the range of 340-410 W/cc.

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Asril Pramutadi Andi Mustari

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IJPhysicsITB@gmail.com

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+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

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

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

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

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