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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

15 16 17 18 19

Cooperation Between Dynamic Coefficient of Restitution and Density Ratio in Supporting Granular Gas Oscillation Occurrence Sparisoma Viridi
Indonesian Journal of Physics Vol 18 No 4 (2007): Vol. 18 No. 4, October 2007
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (185.253 KB)

Oscillations in granular gas are observed and experimental results show, that there is a cooperation between dynamics coefficient of restitution and density ratio simultaneously, which decides whether a binary mixture could experience an oscillation or not.

Optimization of Surface Smoothness of Nd1.12Ba1.88Cu3O7-δ Thin Films Eko Hadi Sujiono
Indonesian Journal of Physics Vol 18 No 4 (2007): Vol. 18 No. 4, October 2007
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (358.981 KB)

We explored the use of Nd1+xBa2-xCu3O7 (x = 0.12) as target material during sputter deposition. Adjustment of the growth parameters such as growth temperature and partial oxygen pressure on the effect of surface roughness, crystallinity, and electrical properties of thin films on SrTiO3 as well as MgO substrates have been studied. The microstructure of Nd1.12Ba1.88Cu3O7-δ thin films was observed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). In order to reduce precipitation on the films, we use special SrTiO3 substrate treatment or applied a buffer layer on MgO substrates, resulting in smooth Nd1.12Ba1.88Cu3O7-δ thin films. Furthermore, the smoothness of a ramp-edge (created by Ar-ion beam etching) is studied. Structuring of the ramp in tri-layer of Nd1.12Ba1.88Cu3O7-δ/SrTiO3/PrBa2Cu3-xGaxO is performed using a standard photolithography process.

Computer Simulation of Turbulent Flow Phenomena in Nuclear Fuel Pin Subassemblies Hisashi Ninokata; Elia Merzari
Indonesian Journal of Physics Vol 19 No 1 (2008): Vol. 19 No. 1, January 2008
Publisher : Institut Teknologi Bandung

This paper focuses on the turbulence phenomena that have been identified by computational fluid dynamics (CFD), and that are peculiar to the flows in tight lattice nuclear fuel subassemblies, eccentric annuli and two-rectangular channels interconnected by a narrow gap. The CFD methods employed are the Direct Numerical Simulation of turbulence (DNS) and Large Eddy Simulation (LES) techniques. Highlighted phenomena include turbulence-driven secondary flows inside a subchannel, local turbulent-laminar transition in the narrow gap region between two adjacent fuel pins, and global pulsation of the flow across the length of a fuel subassembly. Special attention will be paid on linkage to the physics, limitation of the computational capability of the CFD methods, and the usefulness of the technology in reference to the foreseeable future.

Study on Void Reactivity of Liquid Metal Fast Breeder Reactor Azizul Khakim; T. Yokoyama; Hisashi Ninokata
Indonesian Journal of Physics Vol 19 No 1 (2008): Vol. 19 No. 1, January 2008
Publisher : Institut Teknologi Bandung

Liquid Metal Fast Breeder Reactor (LMFBR) usually has positive void reactivity which is not favorable to the reactor safety. Therefore, the void generation should be avoided during normal reactor operation. Design of reactor core should consider the parameters that influence the void reactivity in order to minimize it, should void be generated during an accident. In this study, several parameters have been evaluated to observe their contribution to the overall void reactivity, such as the build-up of minor actinides (MAs), different inner and outer core height, heterogeneous core configuration, upper plenum, upper axial blanket, voiding in the inner and outer core and the effect of P/D. The study is performed in 3-D heterogeneous geometry using Monte Carlo Method of MVP Code with JENDL-3.3

Anisotropy of Magnetic Susceptibility and Elemental Compositions in Andesitic Rocks Khumaedi Sastrawiharja; Satria Bijaksana; Umar Fauzi; Linus Ampang Pasasa
Indonesian Journal of Physics Vol 19 No 1 (2008): Vol. 19 No. 1, January 2008
Publisher : Institut Teknologi Bandung

Igneous rocks, including andesites, are composed of these major elements: Si, Ti, Al, Fe, Mn, Ca, Mg, Na, K, and P. Variation in the composition of these elements, which occur mostly as oxides, determines the overall physical properties of the rocks. Not surprisingly, classification of igneous rocks is also based on the quantity of these major oxides. In this study, elemental compositions of andesitic rocks from the Island of Java will be compared to the anisotropy of magnetic susceptibility (AMS) as a part of our effort to explore the possibility of using rock magnetic parameters in classifying igneous rocks. The objective is to check whether AMS parameters could serve as alternative to chemical analysis. To do so, we have measured the AMS and geochemical composition of andesitic rock samples from 10 different sites across Central Java and Yogyakarta. The results show that there are significant correlations between the abundance of certain elements with AMS parameters, for example, the abundance of Fe and Al with magnetic lineation and the abundance of Al with degree of anisotropy. These results show that magnetic parameters have a good change to be use as predictors for major elements composition in igneous rocks.

Perturbative and Non-perturbative Aspects of the Chern-Simons-Witten Theory Asep Yoyo Wardaya; Freddy P. Zen; Jusak S Kosasih; Triyanta Triyanta
Indonesian Journal of Physics Vol 19 No 1 (2008): Vol. 19 No. 1, January 2008
Publisher : Institut Teknologi Bandung

We investigate a relation between non-perturbative and perturbative cases in the 2+1 dimensional Chern-Simons-Witten (CSW) theory for G = E6 gauge group. In the perturbative case, we calculate the vacuum expectation value (VEV) of an unknotted Wilson loop operator up to order 1/k3 (k is a coupling constant). The result above is proved to be identical to the polynomial invariant E0 (ρ) in the non-perturbative case at the same order of expansion.

Isotopic Fission-yield Calculation of U-233, U-238 and Th-232 for Fast Energy Spectrum Abdul Waris; Rizal Kurniadi; Yuda S. Perkasa; Suwoto Suwoto
Indonesian Journal of Physics Vol 19 No 1 (2008): Vol. 19 No. 1, January 2008
Publisher : Institut Teknologi Bandung

An isotopic fission yield calculation method for fast energy spectrum of neutron has been proposed. This method was derived from a systematic of fission mass yield and a nuclei decay probability. The decay probability was calculated from the level density parameters that derived from a new potential function in combining with the shell correction. The potential function is a modified Wood-Saxon potential that we have called as an extended-Wood-Saxon potential. We have employed the data from RIPL-2 (Reference Input Parameter Library-2) in calculating the level density parameter. The calculation shows similar results compared to the isotopic mass yields of JENDL 3.2 for 233U and 232Th.

An Advanced Energy System Using a Small Fast Reactor as an Energy Source Yasuyoshi Kato; Y. Muto; Takao Ishizuka; N. Nikitin; M. Utamura
Indonesian Journal of Physics Vol 19 No 2 (2008): Vol. 19 No. 2, April 2008
Publisher : Institut Teknologi Bandung

An advanced energy system has been proposed that involves a supercritical carbon dioxide gas turbine fast reactor (S-CO2 FR) as a dispersed energy source, a new waste-heat recovery system from the FR, and a bioconversion system using the recovered waste heat. The FR with S-CO2 gas turbine achieves higher cycle efficiency than conventional sodium-cooled FRs with steam turbines, eliminating problems of conventional FRs related to safety, plant maintenance, and construction costs. The S-CO2 FR consumes minor actinide elements produced in light water reactors as fuel, thereby reducing long-lived radioactive wastes and environmental loads imparted by long-term geological disposal. The recovered waste heat is used for methane and methanol production through fermentation of human and animal wastes in cities and farms. The methane and methanol are easily transported and can accommodate demand changes; they are useful as fuel of fuel cells, automobiles, and gas turbine power plants. The total energy utilization efficiency in electricity and heat is estimated to be higher than 85%, contributing to saving of energy resources and reduction of greenhouse-gas emissions. Consumption of the waste products of cities and farms for production of methane and methanol fosters a recycling society. Compact and high-performance microchannel heat exchangers are used in the S-CO2 FR, the new waste-heat recovery system and the fermentation system.

Global innovation program for nanoscience education -How can we use electrons for our future, Hydrogen society- Mitsuomi Yamaguchi; Mitsugu Hamasaki; Masumi Obara; Kozo Obara; Kenji Watanabe
Indonesian Journal of Physics Vol 19 No 2 (2008): Vol. 19 No. 2, April 2008
Publisher : Institut Teknologi Bandung

The change of global climate suggests the requirements of new technologies, which can suppress or improve the atmospheric composition. In this paper, we show a revolutionary car technology to decrease CO2. The key is the change of the fuel, from gasoline to hydrogen+H2O. The fuel revolution generates hydrogen economy and induces new scientific targets. Nanoscience and nanotechnology are most expectable tools. Especially, understanding the varieties of characteristics of materials in electronic level is the most important therma. We propose international collaborations on nanoscience education to promote our knowledge and understanding each other.

On the Napsuciale-Kirchbach Formalism for Spin 3/2 Field Theory Haryanto M. Siahaan; Triyanta Triyanta
Indonesian Journal of Physics Vol 19 No 2 (2008): Vol. 19 No. 2, April 2008
Publisher : Institut Teknologi Bandung

We consider the newly approach by Napsuciale and Kirchbach as an alternative formalism for spin-3/2 fields. The Feynman rules for interacting case are derived. Gauge invariance property in this formalism is shown from the corresponding invariant Compton scattering amplitude related to gauge transformation of the polarization vector.

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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

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