Proton beam intensity and proton fraction measurement of the 2.45 GHz ECR ion source

Wei, Xianglun; Li, G.P.; Pan, Xiaodong; Wu, Quantan; Liu, Y.G.

doi:10.1088/1748-0221/15/04/t04005

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…According to the research of ECR ion source workers, using an appropriate axial magnetic field distribution can help improve the extraction beam intensity of the ion source. The effects of three traditional axial magnetic field distributions often utilized in ECR ion sources on the ionization properties inside the discharge chamber are confirmed by modeling the plasma inside the discharge chamber [10,17,[25][26][27]. In Figure 8a, the three types of field distribution are displayed.…”

Section: Effects Of Three Classical Axial Magnetic Field Distribution...mentioning

confidence: 70%

Design of a Miniaturized Electron Cyclotron Resonance Ion Source for High-Voltage Proton Accelerator

Yu,

He,

Zhao

et al. 2023

Applied Sciences

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The Electron Cyclotron Resonance (ECR) ion source fulfills high-current, high-efficiency, and compactness requirements for high-voltage proton accelerators. It is a cathode-free source that uses microwaves to heat a magnetically confined plasma, so there is no cathode loss resulting in a short service life. We finished the design for a miniaturization ECR ion source system, including a microwave system and source body. The traditional microwave system’s scale, which is approximately 1 m, has been reduced to 0.234 m, and the transmission efficiency is greater than 90%. The influence of cavity size and magnetic field distribution on gas ionization is analyzed under the condition that the outer size of the permanent magnet ring is limited, and the optimal scheme of cavity size and saddle-shaped magnetic field distribution is obtained. This design meets the requirement of fitting the ion source system into the restricted space in the high-voltage accelerator’s head.

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Section: Effects Of Three Classical Axial Magnetic Field Distribution...mentioning

confidence: 70%

Design of a Miniaturized Electron Cyclotron Resonance Ion Source for High-Voltage Proton Accelerator

Yu,

He,

Zhao

et al. 2023

Applied Sciences

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“…As per literature [13][14][15][16][17][18][19] the use of Boron Nitride (BN), Aluminum (Al) and Alumina (Al 2 O 3 ) as plasma chamber wall materials increases the number of secondary electrons in the plasma. The secondary electron emission coefficient of BN, Al and Al 2 O 3 are 2.9, 1.6 and 6.3 respectively.…”

Section: Aluminum and Boron Nitride Plates In The Plasma Chambermentioning

confidence: 98%

An experimental investigation of the proton fraction in a three electrode 2.45 GHz ECR ion source

Kewlani,

Gharat,

Roychowdhury

et al. 2024

J. Inst.

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The ion beam extracted from a proton ion source contains H+ ion along with H2 + and H3 + molecular ions. In this work, the ionic fractions in the extracted beam of ECR ion source were measured using an analyzing magnet. A computerized proton fraction measurement setup is described in detail with instrumentation and control for pulsed operation of the ECR ion source. A timing diagram has been incorporated for trigger synchronization illustrating the process of pulsing the plasma, controlling the analyzing magnet parameters and acquiring data about the magnetic field and beam current. The proton fraction was measured in two cases, in the first case using SS304 plasma chamber and in the second case incorporating aluminium (Al) cylinder and boron nitride (BN) plates inside the plasma chamber. In the first case, the proton fraction was found to be in the range of ∼60% and in the second case because of the presence of secondary electron donors it increased to 93%. In order to understand the enhancement of H+ fraction in the hydrogen plasma, plasma parameters (ne , Te and EEDF) and its dependence on microwave power and neutral gas pressure were investigated.

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“…neutron generator works in DC mode, the microwave power is continuously adjustable between 300 and 1500 W, the magnetic field is provided by permanent magnets, and the extraction system has three electrodes. When the extraction voltage is 50 kV, the ECR ion source can provide a hydrogen ion beam above 70 mA with a proton fraction great than 0.7 [13].…”

Section: Jinst 16 T07011mentioning

confidence: 99%

Designing and commissioning pre-analysis system for intense D-D/D-T neutron generator

Wei

Pan

et al. 2021

J. Inst.

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An intense accelerator-based D-D/D-T neutron generator, with neutron yields of 6 × 10 10 n/s due to the D-D reaction and 6 × 10 12 n/s due to the D-T reaction, is being developed at Lanzhou University in China. The 2.45 GHz electron cyclotron resonance (ECR) ion source and the pre-analysis system, as the front injector for the accelerator tube of the neutron generator, are designed to provide a 35 mA deuterium beam for neutron production and a 50 mA proton beam for commissioning. The pre-analysis system consists of a solenoid, a steering magnet, a vacuum chamber, a dipole magnet, three quadrupole magnets, a beam dump, and a Faraday cup. The ion source and pre-analysis system were completed a trial operation, and the intensity of the proton beam measured at the end of the pre-analysis system was higher than 50 mA when the hydrogen ion beam current extracted from the ECR ion source was greater than 70 mA.

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Proton beam intensity and proton fraction measurement of the 2.45 GHz ECR ion source

Cited by 5 publications

References 17 publications

Design of a Miniaturized Electron Cyclotron Resonance Ion Source for High-Voltage Proton Accelerator

Design of a Miniaturized Electron Cyclotron Resonance Ion Source for High-Voltage Proton Accelerator

An experimental investigation of the proton fraction in a three electrode 2.45 GHz ECR ion source

Designing and commissioning pre-analysis system for intense D-D/D-T neutron generator

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