Plasma Characteristics in Square Pulse Arc Discharge of Plasma Cathode Electron Source Device

Purwadi, Agus; Siswanto, Bambang; Wirjoadi,; Susita, R M Lely; Sudjatmoko,

doi:10.17146/gnd.2013.16.2.606

Cited by 4 publications

(2 citation statements)

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“…Bejana anoda berongga yang digunakan adalah berbentuk silinder dengan volume V, jejari r dan panjang l (V = πr 2 l), maka kerapatan partikel elektron n e dalam BE adalah jumlah partikel total dibagi dengan volume V. Muatan 1 (satu) coulomb untuk partikel elektron adalah sebanyak 6,256 × 10 18 partikel, sedang muatan total Q yang merupakan hasil kali besar arus lucut I(t) dengan lebar pulsa τ (dapat diperoleh dari hasil eksperimen) atau Q = I(t) × τ, maka kerapatan partikel/elektron n e dalam BE dapat dihitung dengan [10] . (5) Untuk penentuan parameter suhu elektron plasma T e dapat dihitung dari persamaan (2) yang merupakan persamaan untuk rapat arus lucut elektron jenuh/maksimal j e pada suatu nilai tegangan ekstraksi U a tertentu (Gambar 4) yaitu dapat dinyatakan dalam bentuk , (6) dengan T e suhu elektron plasma, m e massa elektron = 9,109 × 10 -31 kg, e muatan elektron = 1,602 × 10 -19 C, n e kerapatan plasma, dan k tetapan Boltzmann = 1,381 × 10 23 J/K.…”

Section: Gambar 3 Emisi Elektron Dari Plasma Dengan Teganganunclassified

Penentuan Parameter Elektron Plasma Bejana Emiter Berbasis Besar Arus Lucut Busur Gas Udara

Purwadi

Suprapto²,

Aziz³

et al. 2020

risal.fis.

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Abstrak – Telah dilakukan penentuan parameter elektron plasma dalam Bejana Emiter (BE) berbasis besar arus lucut busur gas udara pada tegangan 10 kV untuk Ignitor Discharge Power Supply (IDPS) dan tegangan anoda 1 kV untuk Arc Discharge Power Supply (ADPS). Tekanan gas udara divariasi mulai dari 5,70 × 10-3 Torr hingga 7,90 × 10-3 Torr. BE terbuat dari Stainless Steel-304 (SS-304) silinder berdiameter ф = 4,00 cm dan panjang l = 66 cm, dipasangi grid berukuran 60 cm × 2,6 cm dan ditutup dengan frame yang terdiri dari 15 grup lubang (masing-masing berisi 10 lubang kecil berdiameter ф = 0,4 cm). Dari hasil eksperimen pada tekanan gas udara sekitar 6,8 × 10-3 Torr diperoleh arus berkas elektron pulsa terekstraksi sebesar 4,17 A pada tegangan tinggi ekstraksi 5 kV. Berdasarkan arus elekton terekstraksi tersebut, diperoleh kerapatan elektron plasma ne sebesar 3,15 × 1012 partikel/cm3 dan suhu elektron plasma Te sebesar 1,77 × 104 K ≈ 1,50 eV.Kata kunci: emitter, plasma, bejana emiter (BE), lucutan, kerapatan, suhu Abstract – The determination of plasma electron parameters in the Emitter Vessel (EV) based on arc dischage value of air gas has been conducted at 10 kV of Ignitor Discharge Power Supply (IDPS) and 1 kV of anode voltage for Arc Discharge Power Supply (ADPS). The air gas pressure was varied from 5.70 × 10-3 Torr to 7, 90 × 10-3 Torr. The EV was made from Stainless Steel-304 (SS-304) cylindrical shape with diameter ф of 4.00 cm and length l of 66 cm, fitted with 60.00 cm × 2.60 cm grid and covered with a frame consisting of 15 groups of holes (each containing 10 holes small diameter ф of 0.4 cm). From the experiment result at the average air gas pressure of about 6.80 × 10-3 Torr, it was obtained 4.17 A of extracted pulse electron beam current at 5 kV of extracted high voltage. Based on that extracted electron beam current, it was obtained 3.15 × 1012 particles/cm3 of plasma electron density ne and 1.77 × 104 K ≈ 1.50 eV of plasma electron temperature Te. Key words: emitter, plasma, emmiter vessel (EV), discharge, density, temperature

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Section: Gambar 3 Emisi Elektron Dari Plasma Dengan Teganganunclassified

Penentuan Parameter Elektron Plasma Bejana Emiter Berbasis Besar Arus Lucut Busur Gas Udara

Purwadi

Suprapto²,

Aziz³

et al. 2020

risal.fis.

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“…The determination of the type of discharge will depend on the value of the trigger power supply, the plasma generator power supply and the PGC geometry size and shape. The PCES system which need high discharge current until hundreds of ampere (A) and a relatively small discharge voltage of tens volts, then the arc discharge should use the specific G values [4]. The occurrence of voltage distribution/plasma potential φ p in the extraction window area, the existence of the barrier potential or without the potential barrier can be shown from the simulation results using the Opera program with the PEI and PGC geometry and size, extraction hole diameter/grid and electron accelerated or extracted voltage as the data input.…”

Section: Introductionmentioning

confidence: 99%

Electron beam extraction on plasma cathode electron sources system

Purwadi

Taufik²,

Susita³

et al. 2017

AIP Conference Proceedings

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ELECTRON BEAM EXTRACTION ON PLASMA CATHODE ELECTRON SOURCES SYSTEM. The electron beam extraction through window of Plasma Generator Chamber (PGC) for Pulsed Electron Irradiator (PEI) device and simulation of plasma potential has been studied. Plasma electron beam is extracted to acceleration region for enlarging their power by the external accelerating high voltage (Vext) and then it is passed foil window of the PEI for being irradiated to any target (atmospheric pressure). Electron beam extraction from plasma surface must be able to overcome potential barrier at the extraction window region which is shown by estimate simulation (Opera program) based on data of plasma surface potential of 150 V with Ueks values are varied by 150 kV, 175 kV and 200 kV respectively. PGC is made of 304 stainless steel with cylindrical shape in 30 cm of diameter, 90 cm length, electrons extraction window as many as 975 holes on the area of (15 65) cm 2 with extraction hole cell in 0.3 mm of radius each other, an cylindrical shape IEP chamber is made of 304 stainless steel in 70 cm diameter and 30 cm length. The research result shown that the acquisition of electron beam extraction current depends on plasma parameters (electron density ne, temperature Te), accelerating high voltage Vext, the value of discharge parameter G, anode area Sa, electron extraction window area Se and extraction efficiency value .

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Requirements for obtaining the maximum electrons extraction current in the pulse electron irradiator

Purwadi

Suprapto

Aziz

et al. 2020

International Conference on Science and Applied Science (Icsas2020)

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Plasma Characteristics in Square Pulse Arc Discharge of Plasma Cathode Electron Source Device

Cited by 4 publications

References 0 publications

Penentuan Parameter Elektron Plasma Bejana Emiter Berbasis Besar Arus Lucut Busur Gas Udara

Penentuan Parameter Elektron Plasma Bejana Emiter Berbasis Besar Arus Lucut Busur Gas Udara

Electron beam extraction on plasma cathode electron sources system

Requirements for obtaining the maximum electrons extraction current in the pulse electron irradiator

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