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Aripin
Universitas Dian Nuswantoro
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Journal : Makara Journal of Science

 1 
REFLECTION INFLUENCE ON OUTPUT FREQUENCY SPECTRUM AT SUBMILLIMETER FREQUENCY TUNABLE GYROTRONS Aripin, Aripin; Kurniawan, B.
Makara Journal of Science Vol. 6, No. 3
Publisher : UI Scholars Hub

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Influence of output window reflections on oscillatory processes in gyrotrons has been studied. The processes in a gyrotron have been modeled numerically, and enhancement of the spectrum signal in the presence of reflections has been studied. Dependencies of output power versus time and frequency spectrum for different value of reflection coefficient are given. Possibilities of significant increasing of output spectrum are demonstrated experimentally. The results demonstrate significant influence of reflections on operation stability and composition of the output radiation of the gyrotron.
SUSCEPTIBILITY MAGNETIC AND HIGH MAGNETIC FIELD ESR MEASUREMENT OF SrCu2 (PO4 )2 Aripin, Aripin; Mitsudo, Mitsudo; Idehara, T.; Mekata, M
Makara Journal of Science Vol. 11, No. 2
Publisher : UI Scholars Hub

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The magnetic susceptibility and high magnetic ESR measurement of SrCu2 (PO4 )2 has been performed at temperatures ranging from 4.2 K to 300 K and 4.2 K to 77 K, respectively. The magnetic susceptibility shows a broad maximum around T = 40 K. The magnetic susceptibility has been interpreted in terms of one-dimensional magnetic systems. The temperature dependence of the magnetic susceptibility indicated a good agreement with 4-spin alternating configuration model. In the ESR measurement, clear electron spin resonance (ESR) was observed. The integrated intensity for 120 and 301 GHz has a broad maximum at around 40 K, which is consistent with the susceptibility result. A quantitative description gives resonance is the first and second triplet excited states of the excitation spectrum of 4-spin alternating chain configuration. The g1 , g2 and g3 values are approximately 2.21 at temperature above 40 K. The g2 dan g3 values have the dependence of temperature under 40 K.
REFLECTION INFLUENCE ON OUTPUT FREQUENCY SPECTRUM AT SUBMILLIMETER FREQUENCY TUNABLE GYROTRONS Aripin, Aripin; Kurniawan, B.
Makara Journal of Science Vol. 6, No. 3
Publisher : UI Scholars Hub

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

Abstract

Influence of output window reflections on oscillatory processes in gyrotrons has been studied. The processes in a gyrotron have been modeled numerically, and enhancement of the spectrum signal in the presence of reflections has been studied. Dependencies of output power versus time and frequency spectrum for different value of reflection coefficient are given. Possibilities of significant increasing of output spectrum are demonstrated experimentally. The results demonstrate significant influence of reflections on operation stability and composition of the output radiation of the gyrotron.
Co-Authors Agustini, Dini ahmad yani Alfa Mitri Suhara, Alfa Mitri Amrullah, Muhammad Rifqi Hanif Amza, Andi Andhy Romdani, Andhy ANDI NAHRUL HAYAT, MOHAMMAD EXCEL Andryani, Dinda Syaqila Anjani, Ratna Dewi Anshary , Muhammad Adi Khairul Apriana, Erfan Ardiansyah, Ivan Nur Asep Andang, Asep Asmah, Asmah Aswari, Muslim Awaludin, Robi Azzahra, Elsa B. Kurniawan Badriah, Liah Cinantya Paramita Clara Maria Livia Suitela Dany, Rahmad Dedi Nurcipto, Dedi Dita Ayu Mayasari, Dita Ayu Erika Dina Permata Ernita Susanti Fenita Purnama Sari Indah firmansyah maualana sugiartana nursuwars Hanny Haryanto Hariyanto, Stefhant Hayani, Surma Hendrico, Hendrico Herlinda, Mega Hernawati, Diana Hidayati Hidayati I Nyoman Adi Putra Ihtifazhuddin Hawari iin gusmana iin Ilema, Resty Iliyani, Shopiya Imam Taufiqurrahman Indra Pahala Irawan, Henky Jayadi Jayadi Joko Sampurno Juhary Ali Kardiman, Kardiman Karlina Muzianti, Intan Lutfi Amin, Shella Makiyah, Yanti Sofi Marno Marno Mekata, M Menik Dwi Kurniatie Mitsudo, Mitsudo Monitasari, Anna Mubarokiyah, Tasya Azizah Muhammad Miftah Muhammad Miftah, Muhammad Muljono, - Mulyana Mulyana Mustofa, Romy Faisal Muzahar Muzalfa Nakiatun Niza Nadlirah, Tasnim Ahya Naeli Laelal Khiaroh Nasution, Kartini Ningrum, Afifah Rindhika Setya Nuraeni, Nisa Nurfadilah Siregar Nurlaili, Fitroh Nurwulan Adi Ismaya Okto Ivansyah Rachmasari, Sri Ratnasari, Yanti Rita Dwi Pratiwi Riyandi, Albert Saifullah, Firman Sari Ayu Wulandari Sasmita, Yopi Wiliyana Sawitri, Anak Agung Sagung Sayful Arif Shofa, Rahmi Nur Sofi Makiyah, Yanti Steven Adi Santoso Suhada, Karya Sumarjo, Jojo Sumarjo, Jojo Sumarjo Sutisna Sutisna T. Idehara Toto Haryadi, Toto Tulus Suryanto Usrah, Ifkar Vincent Suhartono Wahono, Puji Wilanno, Marga Rizqi Wisnu Agastya Wistama, Sri Tirto Mada Yudiana, Yudiana Yusrizal Yusrizal