Progress of RIBF accelerators
Progress of RIBF accelerators
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RIBF加速器的进展
DOI：
10.1093/ptep/pts046
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发表时间：
2012
影响因子：
3.5
通讯作者：
O. Kamigaito
中科院分区：
文献类型：
--
作者：
H. Okuno;N. Fukunishi;O. Kamigaito
为了极大地扩大放射性同位素(RI)束流的科学机会，理研建造了一个新的重离子加速器设施，名为“RI束流工厂(RIBF)”。K值分别为570 MeV、980 MeV和2600 MeV的三个新的环形回旋加速器将现有K540-MeV环形回旋加速器的输出束能提高到440 MeV/u(轻离子)和345 MeV/u(重离子)。这些高能重离子束由超导碎片分离器BigRIPS通过稳定同位素的射束碎裂或铀同位素的飞行裂变转化为强放射性同位素(RI)束。三个环形回旋加速器于2006年投入使用，铀的RI束流于2007年首次获得。由于自第一束以来所作的持续努力，RIBF的束流强度和有效离子种类正在增加。到目前为止，我们已经用超导环回旋加速器(SRC)加速了氘、氦、氮、氧、铝、钙、锌、氪、氙气和铀束。对于氦束和氧束，提取的束流强度达到1000pNA；对于钙束，最近提取的束流强度超过400 pNA。氙束和铀束的强度也在增加；它们分别达到24和3.6pNA 。本文介绍了RIBF加速器的建造、调试和各种改进措施，以及目前的加速器性能。
In order to greatly expand scientific opportunities with radioactive isotope (RI) beams, RIKEN has constructed a new heavy-ion accelerator facility, called “RI Beam Factory (RIBF).” Three new ring cyclotrons with K-values of 570 MeV, 980 MeV, and 2600 MeV, respectively, boost the energies of the output beams from the existing K540-MeV ring cyclotron up to 440 MeV/u for light ions and 345 MeV/u for very heavy ions. These energetic heavy-ion beams are converted into intense radioactive isotope (RI) beams via projectile fragmentation of stable isotopes or in-flight fission of uranium isotopes by a superconducting fragment separator, BigRIPS. The three ring cyclotrons were commissioned in 2006, and RI beams from uranium were first obtained in 2007. The beam intensities and available ion species are increasing at RIBF, owing to the continuous efforts that have been made since the first beam. So far, we have accelerated deuteron, helium, nitrogen, oxygen, aluminum, calcium, zinc, krypton, xenon, and uranium beams with the superconducting ring cyclotron (SRC). The extracted beam intensities reached 1000 pnA for the helium and oxygen beams, and the calcium beam intensity exceeded 400 pnA recently. The intensities of the xenon and uranium beams are also increasing; they reached 24 and 3.6 pnA, respectively. This paper illustrates the construction, commissioning, and various improvements carried out for the RIBF accelerators, as well as the present accelerator performance.