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Collaboration on Realization of Crystalline Beams

实现晶体光束的合作

基本信息

批准号：
08044076
负责人：
NODA Akira
金额：
$ 2.62万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

With this collaboration for three years, computer simulation on realization of crystalline beam with use of molecular dynamics has been largely proceeded. It is expected that beam crystallization will be realized if the following maintenance conditions are satisfied.That is to say,(1) superperiodicity is high enough and is larger than 2ROO^3<2> times maximum value of betatron tune,(2) the operating energy is lower than the transition energy.Further in order to keep such crystalline beam stably, so-called tapered cooling is needed, which satisfies the matching between beam potential and crystalline structure.About the possibility to experimentally verify such beam crystallization, various efforts have been continued. We have pursued the possibility to make experiments on three dimensional laser cooling by the method to couple the transverse motion with longitudinal motion by using synchro-betatron coupling resonance at TSR of Max-Planck-Institut fur Keruphysik in Heidelberg. For this purpose, low energy ion should be utilized for three dimensional laser cooling and beam accumulation test at such a low energy and efforts to obtain the laser system suited for that condition has been pursued.As for the collaboration on development of injector heavy ion linac, we have joined the construction of superconducting RFQ proceeding at Regnaro National Laboratory and up to now Prototype design has almost been completed. Contribution from our side has been largely appreciated from Italian side and we would like to continue such collaboration after the term of this international collaboration has been expired.

通过三年的合作，利用分子动力学对晶体光束实现的计算机模拟取得了很大进展。如果满足以下维护条件，可望实现束流结晶。也就是说，(1)超周期性足够高，大于2ROO^3<2>倍的betatron调谐最大值，(2)工作能量低于跃迁能量。此外，为了保持这种晶体束的稳定，需要所谓的锥形冷却，以满足束势和晶体结构之间的匹配。关于实验验证这种光束结晶的可能性，各种努力一直在继续。我们利用海德堡马克斯-普朗克-克鲁physik研究所TSR的同步-电子加速器耦合共振，探索了用横向运动与纵向运动耦合的方法进行三维激光冷却实验的可能性。为此，应利用低能量离子进行低能量下的三维激光冷却和光束积累试验，并努力获得适合该条件的激光系统。在喷射器重离子直线加速器的合作开发方面，我们加入了Regnaro国家实验室超导RFQ的建设进程，到目前为止，原型设计已经基本完成。意大利方面非常感谢我方的贡献，我们希望在国际合作期满后继续这种合作。