Development of bipolar-pulse accelerator for intense pulsed ion beam acceleration

Masugata, Katsumi; Shimizu, Yukio; Fujioka, Y.; Kitamura, I.; Tanoue, H.; Arai, Kenta

doi:10.1016/s0168-9002(04)01662-6

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…In this approach, ion implantation is accompanied with selective high-temperature annealing of the ion-implanted layer. Test devices were constructed with BPA as the acceleration power source (voltage: ±200 kV, pulse width: 70 ns [full width half maximum, FWHM]) and gas puff plasma gun used as the ion source, and preliminary experiments were conducted to verify the effectiveness of BPA [20,21]. Although hydrogen, aluminum, and other ion beams with purity about 90% were generated successfully, the beam purity is still insufficient for ion implantation, which requires ion beams with purity of 99% or higher.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, bipolar pulse accelerator (BPA) [19] was proposed as a novel accelerator to further improve beam purity. Test devices were constructed with BPA as the acceleration power source (voltage: ±200 kV, pulse width: 70 ns [full width half maximum, FWHM]) and gas puff plasma gun used as the ion source, and preliminary experiments were conducted to verify the effectiveness of BPA [20,21]. In this study, we report the characteristics of pulsed ion beams using first pulse (negative pulse) of bipolar pulse voltage as the progress of BPA development.…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of Pulsed Heavy Ion Beam Generated in Bipolar Pulse Accelerator

Ito

Kitajima

2016

Elect Comm in Japan

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We have developed a new type of a pulsed ion beam accelerator named "bipolar pulse accelerator" for improvement of the purity of the intense pulsed ion beam. The system utilizes a magnetically insulated accelerate on gap and was operated with the bipolar pulse. A coaxial gas puff plasma gun was used as an ion source, which was placed inside of the grounded anode. Source plasma (nitrogen) of current density of 30 A/cm 2 and pulse duration of 1.0 μs was injected into the acceleration gap. When the bipolar pulse of −114 kV, 70 ns (first pulse) and 85 kV, 62 ns (second pulse) was applied to the drift tube, the ions were successfully accelerated from the grounded anode to the drift tube in the first gap by the negative pulse of the bipolar pulse. The pulsed ion beam with current density of 60 A/cm 2 and pulse duration of 50 ns was obtained at 48 mm downstream from the anode surface. The energy spectrum of the ion beam was evaluated by a magnetic energy spectrometer. The ion energy was in reasonable good agreement with the acceleration voltage, that is, first pulse (negative pulse) voltage of the bipolar pulse. C⃝ 2016 Wiley Periodicals, Inc. Electron Comm Jpn, 99(9): 11-17, 2016; Published online in Wiley Online Library (wileyonlinelibrary.com).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characteristics of Pulsed Heavy Ion Beam Generated in Bipolar Pulse Accelerator

Ito

Kitajima

2016

Elect Comm in Japan

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Bipolar pulse generator for intense pulsed ion beam accelerator

Ito

Igawa

Kitamura

et al. 2007

Review of Scientific Instruments

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A new type of pulsed ion beam accelerator named "bipolar pulse accelerator" (BPA) has been proposed in order to improve the purity of intense pulsed ion beams. To confirm the principle of the BPA, we developed a bipolar pulse generator for the bipolar pulse experiment, which consists of a Marx generator and a pulse forming line (PFL) with a rail gap switch on its end. In this article, we report the first experimental result of the bipolar pulse and evaluate the electrical characteristics of the bipolar pulse generator. When the bipolar pulse generator was operated at 70% of the full charge condition of the PFL, the bipolar pulse with the first (-138 kV, 72 ns) and the second pulse (+130 kV, 70 ns) was successfully obtained. The evaluation of the electrical characteristics indicates that the developed generator can produce the bipolar pulse with fast rise time and sharp reversing time.

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