Investigation of polarized proton target for high intensity hadron

高强度强子偏振质子靶的研究

• 批准号: 21740156
• 负责人: 堂下 典弘
• 金额: $ 2.5万
• 依托单位: Yamagata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740156/
• 关键词: 核子スピン構造; 偏極標的; COMPASS実験; ドレル・ヤン過程

The COMPASS collaboration at CERN has a future program of polarized Drell-Yan experiment with a high intensity of hadron beam to study the nucleon spin structure. I investigated a solid polarized proton target, which can be used under the high intensity hadron beam. After some of tests, the NH3 target material reached the maximum polarization as much as in the SMC experiment and had a 10 times longer relaxation time of the polarization by the new pump system, by optimizing the microwave power and by adjusting the value of paramagnetic centers, which needs for dynamic nuclear polarization.

欧洲核子研究中心（CERN）的COMPASS合作计划在未来进行高强度强子束极化Drell-Yan实验，以研究核子自旋结构。研究了一种可在强子束流下使用的固体极化质子靶。经过一些实验，通过优化微波功率和调整顺磁中心值，新泵浦系统使NH3靶材料达到了与SMC实验相同的最大极化，极化弛豫时间延长了10倍，这需要动态核极化。