Article Per Year (5 Year)
p-Index From 2019 - 2024
1.288
P-Index
This Author published in this journals
All Journal BERKALA FISIKA Jurnal Ilmiah Arena Tekstil Journal of Physics and Its Applications
Pandji Triadyaksa
Department Of Physics, Faculty Of Science And Mathematics, Diponegoro University, Semarang
Astronomy Earth & Planetary Sciences Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

Published : 11 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 11 Documents
Search

 1   2 
Analisis Fenomena Elektrohidrodinamik pada Permukaan Minyak Silikon Menggunakan Plasma Lucutan Pijar Korona Positif Rahayu, Sri; Azam, M.; Triadyaksa, Pandji; Nur, Muhammad
BERKALA FISIKA Vol 10, No 1 (2007): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (379.684 KB)

Abstract

The aim of this research is analysis electrohydrodynamic phenomenon deformation of oil silicon surface by technology of positive corona glow discharge plasma which generated by plasma generator system with point-to-plane electrodes geometry configuration. Variation of voltage and distance between electrodes had been treated to surface of silicon oil. Electrohydrodynamic phenomenon deformation in this research is caused by polarization and ion wind. Ionic wind would be happened if applied voltage over the corona threshold that was 2.6 kV. Graph current of saturation corona unipolar for variation voltage, being formed semi-parabolic equation while the variation of distance between electrodes, being formed linear equation. The hole diameter at variation voltage was influenced by electrics field intensity and momen dipole strength. The hole diameter at variation of distance between electrode was influenced by parabolic angle of electrics line field. The oil velocity for back to initial position is different. Velocity would be go down if the voltage progressively go up and velocity would be go up if the distance between electrode progressively go up.
Rancang Bangun dan Pengujian Sistem Reaktor Plasma Lucutan Pijar Korona guna Mempercepat Pertumbuhan Tanaman Mangrove Triadyaksa, Pandji; Nur, Muhammad; Nasrudin, Nasrudin; Wasiq, J.
BERKALA FISIKA Vol 10, No 3 (2007): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (490.393 KB)

Abstract

Plasma glow discharge corona reactor system has been made and tested to stimulate mangrove growth. Plasma glow discharge corona reactor consists of DC high voltage system and point to plate electode system. Reactor performance test has done on Rhizophora apiculata mangrove species. High voltage system mainly develop using TV fly back that been triggered by pulsed frequency using oscillator circuit. Point to plane electrode system was designed to maintain two electrode range remains 3 cm with number of point electrode plugged parallel with plane electrode are 63 pieces. Plasma glow discharge corona reactor tested  was done on radiation process of mangrove seed by divided sample groups into 6 sample which have different time radiation and 1 sample that not been radiated as a control data. Mangrove growth was analyzed by measure the growth of mangrove plumulae after 17 days of cultivation. Research results shows that in developing plasma glow discharge corona to radiate mangrove, plasma reactor system works in 8 kV DC plasma voltage development. Mangrove growth after 6 time variation of plasma radiation shows a good effect of growth stimulation along with longer radiation time duration.  The increase of mangrove growth was hypothetically caused by an increase of nitrogen concentration in mangrove seeds because of ion nitrogen fixation in the seeds during plasma radiation process
KARAKTERISASI REAKTOR PLASMA BERARUS NEGATIF DENGAN KONFIGURASI ELEKTRODA TITIK-BIDANG DAN PENERAPANNYA PADA KAIN POLYESTER RAJUT GREY Hasan, Siti Nurjannah; Muhlisin, Zaenul; Triadyaksa, Pandji; Arianto, Fajar
BERKALA FISIKA Vol 22, No 1 (2019): Berkala Fisika Vol. 22 No. 1 Tahun 2019
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (825.287 KB)

Abstract

Research on characterisations of plasma reactor with negative current of square-point electrode configuration and its application on grey polyester knit fabric has been carried out. The objectives of this reseach were obtaining characterisation of negative plasma reactor, either with or without sample of the polyester knit fabric, getting ion mobility value, gaining the characterisation of irradiated polyester knit fabric of grey, and obtaining SEM results indicating the morphological changes of the fabric. A Plasma-Electrode Point Plasma reactor which is connected to a high-voltage DC power plant was used in this study. The size of pointfield electrodes was 15 x 15 cm2 with a 1.6 cm needle. The size of the grey knit polyester fabric used was 10 x 10 cm2. Variations in distance between electrodes were 1.5 cm, 1.8 cm, 2.1 cm 2.4 cm, 2.7 cm, 3.0 cm, and 3.3 cm. The results have shown that if the voltage increases, then the current value increses. The voltage which is needed to produce a lower current values is that the presence of a polyester knit fabric of grey. The highest voltage and current values witout sample can be found at a distance of 3.3 cm with a current value of 2.5 mA at a voltage of 3.027 kV, compared with presence of a sample, a current value of 1.6 mA at a voltage of 3.445 kV. The greater distance of the electrode, the smaller ion of the mobility is achieved. Based on the results of the water drop test showed that the longer the irradiation of the cloth, the faster duration of absorption. This is indicated by a distance of 2.4 cm in the duration of 5 minutes obtained the absorption time of 2.15 seconds while in the duration of 35 minutes obtained 1.47 seconds. In the SEM test, it is used 2 cloths where the first cloth used as a control or not subjected to plasma that has little damage where as the second fabric is subjected to plasma treatment with the time of irradiation is about 20 minutes that have damage or peeling on the surface of polyester knit fabrics grey.Keywords: Plasma corona, multi-point field, ion mobility, polyester fabric, textile treatment, the meeting properties of fabric.
STUDI PRODUKSI RADIONUKLIDA MEDIS UNTUK GENERATOR 89Sr/90Y DARI HASIL REAKSI 89Rb(p,n)89Sr/90Y PADA SIKLOTRON MEDIK SECARA KOMPUTASI Hidayat, Yusup; Wardaya, Asep Yoyo; Triadyaksa, Pandji; Setiawati, Evi; Muhlisin, Zaenul; Sumariyah, Sumariyah; Suseno, Jatmiko Endro; Binu Soesanto, Qidir Maulana
BERKALA FISIKA Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (317.978 KB)

Abstract

A computational calculation to determine production capacity of 90Y from the results of nuclearreactions 89Rb(p,n)89Sr/90Y from several medical cyclotrons has been carried out. Calculations were used to obtain the target thickness of 89Rb and maximum activity of 90Y on variable energy, time and irradiation currents. Calculations were also carried out to measure the impurity radionuclide activity during the reaction. The results activities of 90Y were obtained through modeling using the SRIM-2013 software and the TENDL-2017 application and calculated using MATLAB software. The results modeling and of calculations can predict the activity of 90Y and it can be used as an initial reference in the radionuclide production process using a cyclotron. The maximum activity of 90Y of 5409.80 mCi with a 10.54 mm-target thickness of 89Rb is generated from a cyclotron which has a 30 MeV proton beam with a 50 μA radiation current beam and 2 hours irradiation time. Using the same proton, current and irradiation time at irradiation energy of 8 MeV, 15 MeV and 22 MeV, the produced activity of 90Y was smaller, there are 552.28 mCi, 2100.39 mCi and 3644.31 mCi. The radioisotope of 90Y can be used in patients with a normal dose of 0.4 mCi / kg body weight, therefore in one production can supply the needs of 104 patients.Keywords: medical cyclotron, calculation and modeling, 90Y activity
SISTEM OTOMATISASI DAN KENDALI JARAK JAUH LAMPU SMART HOUSE BERBASIS NODEMCU ESP8266 Ningrum, Febri Sintia; Triadyaksa, Pandji
BERKALA FISIKA Vol 23, No 4 (2020): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Internet of Things (IoT) is a concept that aims to expand the benefits of continuously connected internet connectivity. This research aims to utilize IoT on home remote control and automates systems that can be operated with a smart phone application via an internet connection (WiFi). This system used the NodeMCU ESP8266 module as a microcontroller, the light emitting diode (LDR)  sensor  as  an  automation  controller  for  lighting  the  environment  according  to environmental conditions, and the Blynk smartphone application as a remote controller. The process of controlling the lights can be done specifically on certain lights and can be controlled by  the  changes  of  environmental  light  in  the  morning  and  evening.  The  results  showed  that when the LDR sensor was poorly lit, the lamp would be ON and otherwise the lamp would be OFF when the LDR receives more light intensity. In addition, the Blynk application is able to control the lights when connected with internet and tested, in this research, up to 2.7 km. It can be concluded that as long as the system is connected to the WiFi in a stable and continuous manner,  then  this  control  system  can  perform  the  task  of  turning  on  and  off  the  lights independently when the owner is not at home.Keywords: Internet of Things (IoT), Blynk, LDR, Smart House, NodeMCU ESP6288 
SISTEM PENYIRAM TANAMAN CABAI OTOMATIS UNTUK MENJAGA KELEMBABAN TANAH BERBASIS ESP8266 Priyono, Andi; Triadyaksa, Pandji
BERKALA FISIKA Vol 23, No 3 (2020): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The process of planting certain plants requires extra attention, especially in maintaining soil moisture such as in chili plants. Therefore, this research develops an automatic plant watering system that can be monitored via a smartphone using the Telegram application. This system can  do  automatic  watering  according  to  soil  moisture  and  measures  the  temperature  and humidity of the surrounding environment controlled by ESP8266 which is equipped with 16x2 LCD,  YL-69  sensor,  and  DHT11  sensor.  Watering  system  trials  show  excellent  readability comparable  to  calibrators.  Temperature,  humidity,  and  soil  moisture  are  informed  via  a smartphone and LCD that are attached to the watering prototype. The Telegram application is able to send information to carry out the function of watering automation when the soil moisture is less than 50% as a reference in accordance with the characteristics of the chili plants. In addition, the automatic sprinkler trial via the Telegram command, as desired by the user, was also successfully carried out. It is concluded that development of a plant watering system based on soil moisture information has been successfully carried out. The system shows the ability of the Telegram application to provide remote commands to the system that works.Keywords:  Automatic  plant  watering  system,  ESP8266,  Sensor  YL-69,  Sensor  DHT11,  Chili  plants, Telegram
KARAKTERISASI PLASMA LUCUTAN PIJAR KORONA POSITIF PADA KONDISI ATMOSFER DENGAN KONFIGURASI ELEKTRODA TITIK BIDANG DAN PENGARUHNYA TERHADAP KAIN SUTRA ALAM (BOMBYX MORI) Mahendra Kusuma Nugraha; Zaenul Muhlisin; Pandji Triadyaksa
Arena Tekstil Vol 34, No 1 (2019)
Publisher : Balai Besar Tekstil

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (817.932 KB) | DOI: 10.31266/at.v34i1.4980

Abstract

Eksperimen pembangkitan plasma lucutan pijar korona telah dilakukan dengan menggunakan konfigurasi elektroda titik dan bidang. Kondisi plasma lucutan pijar korona terbentuk secara optimal pada jarak antar elektroda (d) setinggi 2,1 cm dan 2,4 cm dan arus saturasi (Is) terukur sebesar 0,75 mA dan 1,0 mA. Kondisi tersebut digunakan sebagai dua karakteristik lucutan yang digunakan dalam tahap perlakuan sampel kain sutra alam (Bombyx mori). Pengujian sifat mekanis pada sampel kain sutra alam dengan perlakuan plasma menunjukkan nilai ketahanan jebol yang menurun dibandingkan nilai ketahanan jebol pada sampel kain sutra alam tanpa perlakuan. Pengujian kekuatan serap zat cair (akuades) pada sampel kain sutra alam dengan perlakuan plasma menunjukkan nilai rerata waktu serap (τ) yang lebih singkat dibandingkan nilai τ pada sampel kain sutra tanpa perlakuan. Pada kedua tahap tersebut, pengoptimalan maksimum dari nilai ketahanan jebol dan daya serap zat cair (akuades) dicapai pada jarak antar elektroda (d) setinggi 2,1 cm, arus saturasi (Is) sebesar 0,75 mA dan waktu perlakuan selama 30 menit. Pengujian sifat mikroskopik membuktikan bahwa dengan adanya perubahan struktur permukaan pada sampel cukup berpengaruh terhadap nilai ketahanan jebol dan rerata waktu penyerapan zat cair (akuades) yang dimiliki.  Hasil pengujian pada tahap ini juga menyatakan bahwa tidak ada penambahan jenis baru dari gugus fungsi terkandung pada sampel kain sutra alam yang diberi perlakuan plasma.
KARAKTERISASI REAKTOR PLASMA BERARUS POSITIF KONFIGURASI ELEKTRODA MULTITITIK-BIDANG DAN PENERAPANNYA PADA KAIN POLYESTER GREY Zaenul Muhlisin; Wienda Intan Permatasari; Fajar Arianto; Achmad Sjaifudin Tayibnapis; Pandji Triadyaksa
Arena Tekstil Vol 33, No 2 (2018)
Publisher : Balai Besar Tekstil

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (385.687 KB) | DOI: 10.31266/at.v33i2.4391

Abstract

Penelitian tentang teknologi plasma pada kondisi atmosfer telah dilakukan untuk mengembangkan industri tekstil. Penelitian ini bertujuan untuk membandingkan karakteristik plasma dengan maupun tanpa penempatan kain polyester grey diantara dua elektroda serta mendapatkan karakteristik serapan tetes air pada kain polyester grey setelah diiradiasi menggunakan plasma. Plasma dibangkitkan dengan mengggunakan reaktor berkonfigurasi elektroda multititik-bidang menggunakan elektroda titik sebanyak 100. Elektroda titik tersebut dihubungkan dengan sumber tegangan tinggi DC dan berperilaku sebagai anoda dengan elektroda bidang sebagai katoda. Jarak antar elektroda titik ditetapkan sebesar 1,3 cm yang dikonfigurasi pada 10 baris dan 10 kolom. Kain polyester grey yang diiradiasi berukuran (10x10) cm2 dan diletakkan pada elektroda bidang. Dalam proses iradiasi, jarak antar elektroda diatur pada jarak 0,9 cm hingga 3,6 cm dengan tiap kenaikan jarak sebesar 0,3 cm. Mobilitas ion dalam proses iradiasi ditentukan dengan menggunakan karakteristik arus – tegangan dari pembangkitan plasma. Proses iradiasi plasma pada kain polyester grey ditetapkan selama 5 menit hingga 35 menit dengan tiap kenaikan durasi selama 5 menit. Hasil pengukuran menunjukkan bahwa semakin besar jarak antara elektroda mengakibatkan besar arus pembangkitan plasma semakin kecil. Akar arus sebagai fungsi terhadap tegangan merupakan persamaan garis lurus sehingga nilai mobilitas ion dapat ditentukan dengan pendekatan persamaan Robinson. Perhitungan mobilitas ion tanpa kain diantara elektroda menunjukkan nilai 30,07 cm2/Vs pada jarak antar elektroda 0,9 cm dengan trend menurun hingga 4,32 cm2/Vs seiring pertambahan jarak antar elektroda. Sedangkan perhitungan mobilitas ion dengan menempatkan kain polyester grey pada elektroda menunjukkan nilai 10,25 cm2/Vs pada jarak antar elektroda 2,1 cm dengan trend yang juga menurun hingga 3,39 cm2/Vs seiring pertambahan jarak antar elektroda. Karakteristik kain polyester grey mengalami perubahan berupa penyerapan tetes air yang semakin cepat hingga 1,2 detik dimana sebelum diiradiasi terukur selama sebesar 15 detik.
PENGARUH DEPOSISI PARTIKEL-PARTIKEL ION NEGATIF PADA KONDISI ATMOSFER TERHADAP KAIN POLYESTER GREY Zaenul Muhlisin; Dhyan Prastiwi; Fajar Ariyanto; Achmad Sjaifudin Tayibnapis; Pandji Triadyaksa
Arena Tekstil Vol 33, No 2 (2018)
Publisher : Balai Besar Tekstil

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (163.713 KB) | DOI: 10.31266/at.v33i2.4001

Abstract

Penelitian ini bertujuan untuk menganalisa daerah kerja plasma korona pada kondisi atmosfer dalam pembangkitan partikel - partikel ion negatif guna memperoleh  nilai mobilitas ion rerata pembawa muatannya. Karakteristik ini dilakukan dengan menggunakan sampel kain polyester grey dan tanpa kain sebagai pembanding.  Lebih lanjut, penelitian ini juga menganalisa karakteristik kain polyester grey setelah diiradiasi dengan plasma korona negatif. Penelitian ini menggunakan reaktor plasma berarus negatif yang tersusun atas elektroda multi titik dan elektroda bidang. Elektroda titik berdiameter 0,5 mm sebanyak 100 titik dengan jarak tiap titik 1,3 cm dan elektroda bidang berukuran 25 x 25 cm2. Sampel kain tenun berbahan Polyester Grey berukuran 10 x 10 cm2 diiradasi pada elektroda bidang. Daerah kerja plasma korona negatif pada kondisi atmosfer dianalisa melalui karakteristik arus-tegangan pada variasi jarak antara elektroda mulai 0,9 cm hingga 3,6 cm dengan beda potensial pembangkitan plasma antara 0 – 4 kV.  Hasil penelitian menunjukkan bahwa kuat arus listik meningkat bersamaan dengan penambahan beda potensial serta penempatan kain polyester grey pada elektroda bidang cenderung menurunkan arus listrik dari plasma korona negatif. Nilai mobilitas ion yang dihasilkan menunjukan semakin kecilnya mobilitas ion yang dihasilkan saat jarak antar elektroda (d) semakin jauh. Hasil pengujian tetes cairan pada kain polyester grey setelah iradiasi menunjukkan adanya perubahan sifat fisis kain. Pada jarak antar elektroda multi titik dan bidang  sebesar 2,1 cm dengan lama peradiasian 35 menit, hasil dominan kecepatan waktu serap rerata kain diperoleh sebesar 1,06 detik dimana sebelum iradiasi melebihi 17 detik.
Comparison of I-V Curves Between the Experiment of Corona Discharge on Gradient Line-To-Plane (GL-P) Configuration and The Mathematical Approach Susilo Hadi; Asep Yoyo Wardaya; Zaenul Muhlisin; Jatmiko Endro Suseno; Pandji Triadyaksa; Ali Khumaeni; Muhammad Nur
Journal of Physics and Its Applications Vol 3, No 2 (2021): May 2021
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v3i2.10491

Abstract

Research has been conducted on the comparison of the I-V characteristic curve between mathematical study and experiment of the generation of negative DC corona discharge in the Gradient Line-to-Plane (GL-P) electrode configuration. The reason for this research is to calculate the suitability of the corona discharge electrical current between the mathematical and experimental study. The active electrode used has length 2 cm and height 4 cm. This research is conducted with variations in the sharpness angle of the active electrode (θ) 300, 450, and 600 and variations in the distance between the electrodes () 2 cm, 3 cm, and 4 cm. The mathematical formulation of the value of the corona discharge electrical current in the configuration of the GL-P electrode is obtained by using the geometric concept approach, which is the formulation of the capacitance value of the ordinary electrical circuit, with the addition of the multiplication factor value k in the sharp area of the active electrode, because in that area the greatest plasma flow distance is obtained. The value of the multiplication factor  is obtained by fitting the curve between mathematical study and experiments. The I-V curve between the mathematical study and the corona discharge generation experiment has a high degree of similarity with the smallest percentage contacting point of 37.50%.The value of the multiplication factor  is influenced by the sharpness angle of the active electrode shape and the distance between the electrodes.
Co-Authors Achmad Sjaifudin Tayibnapis Ali Khumaeni Asep Yoyo Wardaya Binu Soesanto, Qidir Maulana Dhyan Prastiwi Evi Setiawati Fajar Arianto Fajar Ariyanto Hasan, Siti Nurjannah I Gusti Bagus Wiksuana J. Wasiq Jatmiko Endro Suseno Mahendra Kusuma Nugraha Muchammad Azam, Muchammad Muhammad Adrian Lathif Muhammad Nur Muhammad Nur Ningrum, Febri Sintia Priyono, Andi SRI RAHAYU Sumariyah Sumariyah Susilo Hadi Wienda Intan Permatasari Yusup Hidayat Zaenul Muhlisin