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J-PARC construction and its linac commissioning

J-PARC建設とそのリニアック・コミッショニング

山崎 良成

Yamazaki, Yoshishige

J-PARCは原研東海に建設中である。2006年末までにビーム試運転が始まる予定であるが、その前にKEKで2003年からリニアック最上流部のビーム試運転が始まっている。3MeVのRFQリニアックに続く3個のDTLタンクのうちの第1タンクで30mAのピーク電流の負水素イオンを20MeVまで加速した。J-PARC加速器の現況を報告する。

The J-PARC (Japan Proton Accelerator Research Complex) is under construction in JAERI Tokai site. The beam commissioning will start there by the end of 2006. Prior to this, the front end of the linac was beam-commissioned in 2003 at KEK. The negative hydrogen beam with a peak current of 30 mA was accelerated up to 20 MeV by the first tank of the three DTL's following the 3-MeV RFQ linac. The 324-MHz DTL contains the electro quadrupole magnets with water-cooling channels specially fabricated by means of electroforming and wire-cutting technologies. The construction status of the J-PARC accelerator is also presented.

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