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All Journal Journal of Engineering and Technological Sciences Pillar of Physics: Jurnal Berkala Ilmiah Fisika
Sari, Mona Berlian
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha No. 10, Bandung 40132,
Earth & Planetary Sciences Engineering Materials Science & Nanotechnology Physics

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Simulation of Void Detection System using Gamma-Ray Compton Scattering Technique Wirawan, Rahadi; Waris, Abdul; Kim, Hong Joo; Djamal, Mitra; Sari, Mona Berlian
Journal of Engineering and Technological Sciences Vol 51, No 3 (2019)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.168 KB) | DOI: 10.5614/j.eng.technol.sci.2019.51.3.5

Abstract

A simple void detection system for concrete was successfully developed using high-penetration gamma rays with Compton scattering. This research attempted to identify a void in the subsurface of a concrete volume that could not be accessed from any of the sides. Monte Carlo simulation using GEANT4 toolkit was performed to investigate the gamma-ray backscattering events. An NaI(Tl) detector was used with 60Co and 137Cs as gamma-ray sources. The void?s location was successfully detected during material target scanning. Density discrepancies conduce variance of the backscattering peak produced due to the presence of a void. Compared to 60Co as the gamma-ray source, 137Cs is a better choice for application in NDT systems using Compton scattering.
Simulation of Void Detection System using Gamma-Ray Compton Scattering Technique Mona Berlian Sari; Rahadi Wirawan; Abdul Waris; Hong Joo Kim; Mitra Djamal
Journal of Engineering and Technological Sciences Vol. 51 No. 3 (2019)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2019.51.3.5

Abstract

A simple void detection system for concrete was successfully developed using high-penetration gamma rays with Compton scattering. This research attempted to identify a void in the subsurface of a concrete volume that could not be accessed from any of the sides. Monte Carlo simulation using GEANT4 toolkit was performed to investigate the gamma-ray backscattering events. An NaI(Tl) detector was used with 60Co and 137Cs as gamma-ray sources. The void's location was successfully detected during material target scanning. Density discrepancies conduce variance of the backscattering peak produced due to the presence of a void. Compared to 60Co as the gamma-ray source, 137Cs is a better choice for application in NDT systems using Compton scattering.
Easy monitoring and data record system of electric current detected by ACS712 affordable non-destructive electrical current sensor Mona Berlian Sari; Lia Yuliantini; Hafizh Prihtiadi; Mitra Djamal
PILLAR OF PHYSICS Vol 13, No 2 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1229.984 KB) | DOI: 10.24036/10741171074

Abstract

Monitoring and data record system of electric current on the current conducting wire has been developed. Recently, the current measurement was conducted by electronic circuit configuration by adding the shunt resistance in the circuit configuration. Compare to the voltage measurement, the electric current measurement has several obstacle and sometimes dangerous, especially on the AC current measurement. This study offers the automation of electric current measurement using affordable and non-destructive ACS712 Hall effect sensor. Hall effect is the phenomena of charge flow deflection in the metal plate that is placed in the magnetic field. By using this sensor, it is possible to detect the AC and DC current on conducting wires. The output of the sensor  voltage will be change based on the magnetic field obtained due to current flows in the wire. Those output voltage are processed in microprocessor of ATMEGA238. Measurement results are saved in *.txt format. LabVIEW is used as the display system interface to simplify the utilization. The measurement is conducted in the Faraday cage. This system can be one of answer for the efficient and stable affordable current measurement with the precision is 0.9954 and average of accuracy percentage is 99.5934%. To reach those precision, the sensor calibration formula in datasheets should be corrected by subtracts the sensor calibration formula with the constant of 0.125.
Co-Authors Abdul Waris Hong Joo Kim Kim, Hong Joo Lia Yuliantini Melany Febrina, Mitra Djamal, Hafizh Prihtiadi, Eko Satria, Mitra Djamal Mitra Djamal Wirawan, Rahadi