J-PARC主リングのビームパワー増強
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- 五十嵐 進
- 高エネルギー加速器研究機構
書誌事項
- タイトル別名
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- Beam Power Upgrade of the J-PARC Main Ring
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説明
<p>The main ring (MR) is the final stage accelerator of J-PARC to provide high-intensity proton beams to experiments for the elementary particle and nuclear physics. We have been increasing the beam power since the start of the beam commissioning in 2008, because the success of the experiments depends largely on the beam power. MR has two operation modes: the fast extraction (FX) mode for the neutrino experimental facility and the slow extraction (SX) mode for the hadron experimental facility. For the FX mode, the beam power of 500 kW was achieved in 2019 and operated until the summer of 2021 with the cycle time of 2.48 s. For the SX mode, the beam power of 65 kW was achieved in 2021 with the cycle time of 5.2 s and the extraction efficiency of 99.5%. The accelerator components have been upgraded to achieve higher beam power with the faster cycling scheme in 2021 and 2022. The FX operation resumed in Apr. 2023 with the cycle time of 1.36 s. We have achieved the beam power of 760 kW in Dec. 2023 and 800 kW in June 2024, exceeding the original design of 750 kW. The faster-cycle SX operation was started in Apr. 2024 and the beam power of 81 kW was achieved with the cycle time of 4.24 s. We plan to upgrade for the beam power of 1.3 MW for the FX mode and more than 100 kW for the SX mode.</p>
収録刊行物
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- 加速器
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加速器 21 (4), 305-313, 2025-01-31
一般社団法人 日本加速器学会
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詳細情報 詳細情報について
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- CRID
- 1390584565601067904
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- ISSN
- 24361488
- 13493833
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
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- 抄録ライセンスフラグ
- 使用可