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Usman Malik
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Komunikasi Fisika Indonesia
Published by Universitas Riau
ISSN : 14122960     EISSN : 2579521X     DOI : 10.31258/jkfi
Core Subject : Science, Engineering,
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
KFI mempublikasikan artikel hasil penelitian dan review pada bidang fisika, namun tidak terbatas, yang meliputi fisika murni, geofisika, plasma, optik dan fotonik, instrumentasi, dan elektronika, dan fisika terapan (aplikasi fisika).
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 6 Documents
 1 
Search results for , issue "Vol 11, No 8 (2014)" : 6 Documents clear
NUMERICAL STUDIES OF MAGNETIC FIELD DYNAMICS IN HEMISPHERICAL ELECTRODES PLASMA FOCUS Fairuz Diyana Ismail; Saktioto '
Komunikasi Fisika Indonesia Vol 11, No 8 (2014)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1291.417 KB) | DOI: 10.31258/jkfi.11.8.538-546

Abstract

This study is aimed to numerically and experimentally investigate the magnetic field dynamics in hemisphericalelectrodes plasma focus. We have initiated the numerical magnetic field propagation by finite differenceapproach with Taylor expansion for the purpose of each distribution to plasma focus medium but not specifiedfor hemispherical electrodes design. Although the magnetic field profile is still in arbitrary numbers, this modelcan simply be used to compare with the experimental results. The absorption and attenuation of magnetic fieldare affected by the plasma medium mainly the production of electron and charged particle movement. However,the code generated for magnetic field attenuation is assumed for dimension and time dependant only. 
MENGHITUNG PERCEPATAN GRAVITASI BANDUL DAN GERAK PARABOLA Hernelis R
Komunikasi Fisika Indonesia Vol 11, No 8 (2014)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (346.523 KB) | DOI: 10.31258/jkfi.11.8.547-552

Abstract

Experiment to calculate gravitational accceleration has been done using physical pendulum and parabolicmotion principles. One pendulum mass was used namely 0.4 kg .Gravitational acceleration for mass isg =29.295 m/s 2 . These results are close enough to the literature 9.81 m / s . Relative error of this gravitydetermination for each pendulum are 5.3 % .
SEL SURYA FOTOELEKTROKIMIA DENGAN MENGGUNAKAN NANOPARTIKEL PLATINUM SEBAGAI ELEKTRODA COUNTER GROWTH Iwantono '; Erman Taer; Rika Taslim; Lutfi Rindang Lestari
Komunikasi Fisika Indonesia Vol 11, No 8 (2014)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (483.184 KB) | DOI: 10.31258/jkfi.11.8.553-560

Abstract

Telah dilakukan fabrikasi dan pengukuran sel surya fotoelektrokimia dengan menggunakan nanopartikel platinumpada elektroda counter. Nanopartikel platinum ditumbuhkan di atas permukaan substrat padat (ITO) dengan metodein-situ growth (penumbuhan langsung) pada suhu 50 °C dengan variasi penumbuhan berulang (1 lapisan, 2 lapisan,dan 3 lapisan). Sel surya dibentuk seperti susunan sandwich yang menghubungkan antara elektroda counter(nanopartikel platinum) dan elektroda kerja (nanopartikel ZnO), dengan elektroda kerja diberi perlakuan variasikonsentrasi dan penambahan amoniak. Nanopartikel platinum tumbuh yang memberikan respon baik pada uji seladalah pada penumbuhan 1 lapisan. Hasil pengujian sel di bawah pencahayaan lampu halogen 100 watt, daerah aktifsel 1 cm x 1 cm memperlihatkan karakteristik I-V dengan parameter keluaran, tegangan rangkaian terbuka (V oc ) 274mV, arus rangkaian pendek (I sc ) 0,21 mA, fill factor (FF) 0,96 (96%), daya maksimum (Pmax) 0,056 mW untukvariasi konsentrasi. Sedangkan untuk variasi penambahan amoniak menghasilkan output tegangan rangkaian terbuka(V oc ) 119 mV, arus rangkaian pendek (I sc ) 0,1225 mA, fill factor (FF) 0,76 (76%), daya maksimum (P max ) 0,011 mW.
KOREKSI BENTUK BERKAS CAHAYA LASER DIODA MENGGUNAKAN LENSA SILINDER Ahmad Fauzi; Minarni '
Komunikasi Fisika Indonesia Vol 11, No 8 (2014)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (188.869 KB) | DOI: 10.31258/jkfi.11.8.561-567

Abstract

Diode laser is kind of laser which uses semiconductor material as the gain medium. Diode laser is preferred insome applications because it is less expensive, compact, available in wide range of wavelength and power.Unfortunately, diode laser also has some disadvantages compared to other types of laser. The material shape oflaser diode produces unsymmetrical beam shape whereas most laser applications need a circular beam.Correction of the beam shape can be done using some optics such as anamorphics prism pairs, cylindrical lenspairs and optical fibers. In this study, the beam shape of two diode lasers are corrected by a pair of cylindricallens and measured using a photodiode and CCD camera. The first diode laser is a coherent 830 nm diode whichhas beam size in x and y axis respectively 0.65 mm, 1.35 mm. The second diode laser is aixiz 638 nm diodelaser which has beam size in x and y axis respectively 1.34 mm, 3.67 mm. The first diode laser was bestcorrected using a pair of cylindrical with a focal length of 75 mm and -12.7 mm, the distance between the lens is7.15 cm which produced beam size in x and y axis respectively 1.38 mm and 1.51 mm. The second diode laserwas best corrected using a pair of cylindrical lens with focal length 95 mm and -19 mm, the distance betweenthe lens is 8.1 cm which produced beam size in x and y axis respectively 1.95 mm and 2.2 mm.
MULTI-PHOTONS TRAPPING STABILITY WITHIN A FIBER BRAGG GRATING FOR QUANTUM SENSOR USE Saktioto '
Komunikasi Fisika Indonesia Vol 11, No 8 (2014)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (472.685 KB) | DOI: 10.31258/jkfi.11.8.568-574

Abstract

We propose an interesting result of the trapped multi photons distribution within a fiber Bragg grating. Thetrapped photons are confined by the potential well, which introduce the motion of photons in a fiber Bragg gratingaffected by multi perturbations. The external perturbations are defined as series of nonlinear parametric in terms ofpotential energy. This investigation is developed by using the nonlinear couple mode equations and under Braggresonance condition where the initial frequency of the light,  0 is the same value as the Bragg frequency,  B . Theresults show that the higher perturbation series represents the potential well is much indifferent of equilibrium. Inapplications, the perturbation can cause the trapped photons instability which introduces the escape photons from thepotential well. The applications such as entangled photon source and quantum sensors can be performed.
MULTI-PHOTONS TRAPPING STABILITY WITHIN A FIBER BRAGG GRATING FOR QUANTUM SENSOR USE ', Saktioto
Komunikasi Fisika Indonesia Vol 11, No 8 (2014)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.11.8.1-7

Abstract

We propose an interesting result of the trapped multi photons distribution within a fiber Bragg grating. Thetrapped photons are confined by the potential well, which introduce the motion of photons in a fiber Bragg gratingaffected by multi perturbations. The external perturbations are defined as series of nonlinear parametric in terms ofpotential energy. This investigation is developed by using the nonlinear couple mode equations and under Braggresonance condition where the initial frequency of the light, ? 0 is the same value as the Bragg frequency, ? B . Theresults show that the higher perturbation series represents the potential well is much indifferent of equilibrium. Inapplications, the perturbation can cause the trapped photons instability which introduces the escape photons from thepotential well. The applications such as entangled photon source and quantum sensors can be performed.

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