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All Journal Komunikasi Fisika Indonesia Jurnal Pilar Sains JURNAL FISIKA Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam SEMIRATA 2015 Journal of Aceh Physics Society Jurnal Litbang Industri Jurnal Edu Research Riau Journal of Empowerment Jurnal Fisika Indonesia Journal of Technomaterial Physics Jurnal Litbang Industri Science, Technology, and Communication Journal
Rakhmawati Farma
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Agriculture, Biological Sciences & Forestry Astronomy Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics Social Sciences

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Argon plasma ionization in thermodynamic equilibrium with continuity equation Anshori Kasri; Saktioto Saktioto; Rakhmawati Farma; Ari Sulistyo Rini; Erwin Erwin; Awitdrus Awitdrus
Science, Technology, and Communication Journal Vol. 5 No. 3 (2025): SINTECHCOM Journal (June 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v5i3.318

Abstract

Local thermodynamic equilibrium is a foundational concept in plasma physics and heat transfer, describing a state where each small region of a system can be treated as if it is in thermodynamic equilibrium, even if the whole system is not. However, achieving accurately perfect thermodynamic equilibrium conditions in real-experiments is often challenging. It often struggles for understanding phenomena like excited states or specific Arrhenius-driven reactions. As a result, the advantages of plasma modeling with simplifications can sometimes overshadow the disadvantages of experiments. This study simulated the ionization process of argon plasma using the 4th order Runge-Kutta numerical method. The simulation, initiated with initial densities before the simulation is run, each of them is electrons 2.6 × 1018 m-3, neutral argon (Ar) 2.6 × 1018 m-3, positive argon ions (Ar+) 2.6 × 1018 m-3, and positive diatomic argon ions (Ar2+) 2.6 × 1018 m-3, successfully obtained reaction rate equilibrium data at the 625th iteration. The final densities observed were 2.46 × 1018 m-3 for electrons, 2.27 × 1018 m-3 for neutral argon, 6.4 × 1015 m-3 for Ar+, and 4.34 × 1017 m-3 for Ar2+. These results show the equilibrium reaction rate in argon plasma which provides information that density of electron and Ar+ species show a decreasing trend while density of Ar and Ar2+ species shows an increasing trend which are the result of ionization and recombination processes in the entire plasma system.
Sosialisasi Aplikasi Pupuk Nanomagnetik Pasir Besi Pada Tanaman Jagung di Desa Pulau Semambu Ogan Ilir Sumatera Selatan Sebagai Integrasi Penelitian dan Perkuliahan Fitri Suryani Arsyad; Dedi Setiabudidaya; Menik Ariani; Idha Royani; Amiruddin Supu; Risfidian Mohadi; Aldes Lesbani; Rakhmawati Farma; Balada Soerya; Siti Nur’aini; Beta Riana Liasari
Riau Journal of Empowerment Vol 7 No 2 (2024)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/raje.7.2.156-167

Abstract

Socialization activities have been carried out regarding the application of iron sand nanomagnetic fertilizer (Fe3O4) on corn plants to the villagers of Pulau Semambu Ogan Ilir, South Sumatra. This community service activity is part of the integration of the research results that have been carried out. From the results of the study, it was found that at the same growing age, corn added with nano-magnetic iron sand, both simaxx + nanomagnetic iron sand and silica + nanomagnetic iron sand, had a faster growth of about 100 cm compared to corn that was only given simaxx fertilizer. which is about 45-50 cm. Research results and observational data were then collected and analyzed to evaluate the effectiveness of using Fe3O4 nanomagnetic fertilizer on corn plants. Apart from being disseminated to corn farmers, research results are also used as teaching material to be conveyed to students in material physics courses. Integrating research results with community service activities and material physics lectures has increased the practical use of research results and provided wider benefits for society and students.
Comparison of sensitivity and thermal response of chirped fiber Bragg gratings at various degrees of bending Saktioto Saktioto; Titis Oktiva Sari; Rakhmawati Farma; Rahmondia Nanda Setiadi; Tengku Emrinaldi; Defrianto Defrianto
Indonesian Physics Communication Vol 23, No 2 (2026)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.23.2.133-136

Abstract

The development of optical fiber sensors based on Fiber Bragg Grating (FBG) has driven the need for a deeper understanding of sensor characteristics under mechanical deformation conditions. This study is motivated by the limited investigations specifically examining the simultaneous interaction between bending and thermal response in chirped FBG. This research aims to analyze the effect of bending degree on the sensitivity and thermal response of Chirped Fiber Bragg Grating (CFBG), to observe Bragg wavelength (λB) shifts and transmission power variations, and to determine the optimal bending configuration. Measurements were conducted using a dual laser source at wavelengths of 1310 nm and 1550 nm, with bending angle variations of 0°, 10°, 20°, 30°, and 40°, across a temperature range of 35°C to 49°C representing human physiological conditions. Results demonstrate that bending degree exerts a substantially more dominant influence on transmission power than temperature variation, with inter-angle power differences exceeding 12 dB. Bending angles of 20° and 30° consistently yielded the highest transmission power, with sensitivity values reaching 1555.72% and 1527.37% respectively at 1550 nm. The 1310 nm wavelength exhibited slightly higher sensitivity, whereas the 1550 nm demonstrated better thermal response stability. This research contributes to establishing optimal operating conditions for CFBG sensors in wearable health monitoring applications requiring high sensitivity and reliable thermal stability.
Co-Authors Ade Nur Indah Lestari Agustino Agustino Agustino Agustino Agustino Agustino Aldes Lesbani Alexander Nasution Amalia Apriliani Putri Amiruddin Supu Anshori Kasri Apriwandi Aria Yunita Aria Yunita Awaludin Martin Awitdrus Awitdrus, Awitdrus Balada Soerya Beta Riana Liasari Daulay, Siti Rahma Decha Apriliany Suwandi Dedi Setiabudidaya Defrianto Defrianto Desmagrini Desmagrini Desy Veyka Rukmana Dewi Mulfida Eko Nur Arif Erin Mazelly Hutapea Erman Taer Erwin Erwin Fitri Suryani Arsyad Fitri Wahyuni Haliza Putri Hardanto, Lilik Tri Idha Royani Ikhsan Rahman Husein Inrizky Domy Muchammadsam Irma Apriyani Irma Apriyani Irma Apriyani Iwantono Iwan Barnawi Juandi Muhammad Julnaidi, Julnaidi Karina Silviani Kresna, Pharada Lilik Tri Hardanto Meisya Meisya Melda Oktaviandari Melinda Vivi Menik Ariani Meryati Pertiwi Miftah Ainul Mardiah Minarni Minarni Mohamad Deraman, Mohamad Muhammad Nasir Muhammad Nasir Mulfida, Dewi Novi Yanti Nurlisa Kartikasari Nursyafni, Nursyafni Nurul Tania Pharada Kresna Purba, Cenora Evelynza Rahmi Dewi Rahmondia Nanda Setiadi Raysa Fadillah Reeky Fardinata Rika Taslim Rika Taslim Rini, Ari Sulistyo Rinti Rahimah Hasibuan Risfidian Mohadi Saktioto Saktioto Saktioto Saktioto Sinta Afria Ningsih Siti Nur’aini Sugiyanto Sugiyanto Tengku Emrinaldi Titis Oktiva Sari Vepy Asyana Vepy Asyana Widarti ' Yanuar Hamzah Yurike Asra Zurya Hanifa