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

由于2005年批准了为SPring-8光强子产生实验制作偏振HD靶的五年计划预算，我们开始了实验所需的所有仪器的具体设计。我们在RCNP现有建筑物上建造了一个深5.5 m，直径约2 m的混凝土深孔，用于低温研究。我们列出了本项目要做的课题。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靶和使用超高纯度Al线将HD靶冷却到17 mK的新方法。介绍了实现6.5mK的3 He-4 He制冷机。在理论三维磁场计算的基础上，为制冷机安装了17特斯拉的超导磁体.由于与法国奥赛科学家的合作，我们推出了HD气体净化系统。4.我们安装了冰箱的控制系统.从奥赛引进了两套低温恒温器系统。经过微小的改进后，这两个转移式恒温器将用于我们的实验。新的IBC（In-Beam-Cryostat）装置已经设计完成，并发表了有关SPring-8 γ束物理实验的论文。

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.