Polarized hydrogen and deuterium target and Spin-Parity of Penta-quark particle

由于2005年春八光强子产生实验所需的偏振HD靶的生产预算被批准为为期五年的项目，我们开始了执行实验所需的所有仪器的具体设计。我们在现有建筑上建造了一个深5.5m、直径约2m的混凝土深洞，用于RCNP的低温研究。我们列出了本项目中要做的课题。我们确定了制作偏振HD靶所需的所有理论参数。特别是，我们开发了使用单晶HD靶和使用超高纯铝丝将HD靶冷却到17Mk.2的新方法。我们引进了3He-4He幻觉制冷机，实现了6.5MK。在理论三维磁场计算的基础上，为冰箱安装了17特斯拉超导磁体。我们引入了HD气体净化系统，这要归功于与法国奥赛科学家的合作。我们安装了冰箱的控制系统。从Orsay向RCNP引进了两个转移低温恒温器系统。经过微小的改进后，这两个转换式低温恒温器将用于我们的实验。在束低温恒温仪(IBC)的设计和研制过程中，我们成功地完成了这台仪器的研制工作，并发表了一批与SPRING-8伽马束物理实验相关的论文。

Thanks to the approve of the budget for producing the polarized HD target for the photo-hadron production experiment at SPring-8 as the 5-years project in 2005, we started the concrete designs for all the instruments needed to perform the experiment. We constructed a deep concrete hole with the depth of 5.5 m and the diameter of about 2 m at the existing building for the cryogenic researches at RCNP. We list up the subjects to be done in the present project.1. We decided all the necessary theoretical parameters for making the polarized HD target. Especially, we developed the new method to use the mono-crystal HD target and to use ultra-high purity Al wire for cooling down the HD target down to 17 mK.2. We introduce the 3He-4He delusion refrigerator to realize 6.5 mK. On the basis of the theoretical three dimensional magnetic filed calculation, we installed the 17 Tesla superconducting magnet for the refrigerator.3. We introduced the HD gas purification system thanks to the collaboration work with the ORSAY scientists in France.4. We installed the control system for the refrigerator.5. Two transfer cryostat systems are imported from ORSAY to RCNP. After the minor improvements, these two transfer cryostats will be used for our experiments.6. The new instrument called IBC (In-Beam-Cryostat) has been designed and successfully completed.In addition, some of the papers relating to the work on the physics experiments with the gamma beam at SPring-8 have been published.