Radiation processing of natural latex using a wide-aperture electron accelerator with a plasma emitter

Vorob’ev, M. S.; Денисов, В. В.; Koval, N. N.; Шугуров, В. В.; Yakovlev, V. V.; Uemura, Kentaro; Raharjo, Purwadi

doi:10.1134/s0018143915030169

Cited by 14 publications

(2 citation statements)

References 2 publications

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“…Sistem iradiator elektron berbasis SEKP ini diharapkan dapat memberikan arus pulsa berkas elektron 50 -100 A dan dalam luasan keluaran 15  60 cm 2 . Iradiator elektron yang dapat menghasilkan keluaran berkas elektron dengan tampang-lintang luas dan arus berkas yang tinggi dapat diaplikasikan dalam teknologi radiasi, dalam modifikasi permukaan untuk struktur materi, dalam pemompaan media aktif gas laser dan dalam bidang-bidang lainnya (3)(4)(5)(6)(7) .…”

Section: Pendahuluanunclassified

Analisis Uji Fungsi Sistem Elektrode Ignitor Untuk Sumber Elektron Katode Plasma

Susita¹,

Sudjatmoko²,

Siswanto³

et al. 2016

gmin

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ABSTRAK ANALISIS UJI FUNGSI SISTEM ELEKTRODE IGNITOR UNTUK SUMBER ELEKTRON KATODE PLASMA. Sistem elektrode sumber elektron katode plasma adalah suatu sistem yang berfungsi untuk menghasilkan plasma pulsa di dalam bejana generator plasma secara terkendali. Sistem elektrode terdiri dari sistem elektrode ignitor yang menginisiasi lucutan plasma dan sistem elektrode pembentuk plasma. Sistem elektrode ignitor yang dirancang tersusun dari bahan kuningan dan di depannya diberi penyambung dari bahan magnesium, bahan isolator terbuat dari teflon karena mempunyai nilai resitivitas elektrik yang tinggi (>1018 Ω cm), dan anode dibuat dari bahan SS 304 non magnetik. Bahan magnesium digunakan sebagai katode, karena magnesium mempunyai sifat fisis laju erosi paling rendah (11,7 μg/C) dan energi kohesif yang rendah sekitar 1,51 eV/atom. Dengan demikian semakin besar arus menuju katode akan semakin besar pula lucutan spot plasma yang dihasilkan. Hasil uji fungsi sistem elektrode ignitor diperoleh arus spot plasma 10,58 A dengan lebar pulsa 39 μs. Spesifikasi katode yang digunakan pada sistem elektrode ignitor berbentuk silinder dengan diameter 6 mm dan panjang 20 mm. Untuk frekuensi pengulangan spot plasma 10 Hz, katode akan tererosi dan berkurang sepanjang 17,64 μm, sedangkan untuk katode tererosi membentuk kerucut, maka katode akan berkurang sepanjang 26,46 μm untuk waktu pengujian sumber elektron katode plasma selama 5 jam. Bentuk erosi dari katode dipengaruhi oleh arus spot plasma, lebar pulsa serta kevakuman bejana plasma.

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Section: Pendahuluanunclassified

Analisis Uji Fungsi Sistem Elektrode Ignitor Untuk Sumber Elektron Katode Plasma

Susita¹,

Sudjatmoko²,

Siswanto³

et al. 2016

gmin

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“…Electron beams of the large cross-section (10 2 -10 4 cm 2 ) extracted through foil windows into the air or high-pressure gas are used for excitation of high-power lasers, polymerization of monomers, switching of high currents, sterilization of foodstuffs and medical tools, air and water purification, plasma chemistry, radiation chemistry, and so on. (James, 1979;Bugaev et al, 1984;Sokovnin, 2007;Vorob'ev et al 2015]. Often, one of the major problems in sources of such beams is to minimize the energy loss of a beam during its formation, transport, and extraction.…”

Section: Introductionmentioning

confidence: 99%

Generation, transport, and efficient extraction of a large cross-section electron beam into an air in an accelerator with a mesh plasma cathode

Vorobyov

Koval

et al. 2018

Laser Part. Beams

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The paper presents experimental and theoretical research data on the generation, transport, and extraction of a large cross-section (750 × 150 mm2) electron beam into the air through a thin metal foil in an accelerator with a mesh plasma cathode on the bases of a low-pressure arc and with a multi-aperture two-electrode electron-optical system. When the burning conditions of the arc discharge, responsible for the generation of the emission plasma, is changed, the characteristics of this plasma were investigated, including under the conditions of the selection of electrons from it. Our experiments show that at an accelerating voltage of 200 kV, current in the accelerating gap of up to 30 A, and full width at half maximum of up to 100 µm, the average extracted power is ≈4 kW and the extracted beam current is ≈85% from the common current into the accelerating gap. Our numerical estimates give a good correlation between the arc and emission plasma parameters depending on the electrode configuration in the discharge system and on the mechanism of electron beam generation. Analysis of the emission plasma parameters under different arc conditions and of the mechanisms responsible for the beam energy loss suggests that most of the energy in the accelerator is lost at the support grid and at the output foil due to defocusing of the beam and partial electron reflection from the foil. Other mechanisms that decrease the extracted beam energy are discussed.

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Parameters and characteristics of a pulsed constricted arc discharge operating in a forevacuum-pressure plasma-cathode electron beam source

Казаков

Medovnik

Окс

et al. 2021

Vacuum

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Radiation processing of natural latex using a wide-aperture electron accelerator with a plasma emitter

Cited by 14 publications

References 2 publications

Analisis Uji Fungsi Sistem Elektrode Ignitor Untuk Sumber Elektron Katode Plasma

Analisis Uji Fungsi Sistem Elektrode Ignitor Untuk Sumber Elektron Katode Plasma

Generation, transport, and efficient extraction of a large cross-section electron beam into an air in an accelerator with a mesh plasma cathode

Parameters and characteristics of a pulsed constricted arc discharge operating in a forevacuum-pressure plasma-cathode electron beam source

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