Collaboration on development of very high intensity pulsed neutron sources

合作开发甚高强度脉冲中子源

• 批准号: 11694111
• 负责人: KIYANAGI Yoshiaki
• 金额: $ 4.42万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11694111/
• 关键词: spallation; neutron moderator; neutron target; neutron reflector; spactra; pulse; shield; 中性子減速材; スポレーション中性子源; 液体水素; プレモデレータ; 複合型減速材; 中性子輸送コード; MCNPX; 高分解能用冷中性子源; 液体水素減速材; 鉛反射体

High power spallation neutron sources with a power of MW class are now under construction in Japan and the USA, and in the Europe a higher power spallation neutron source with a power of 5 MW is now under planning. The neutron production part (target/moderator/reflector system : TMRS) of the facility is most important since it determines the performance of the facility. In this project, we studied the TMRS and got the results described below.We could introduce a new simulation code by collaborating with Los Alamos, and it has been a very powerful tool for optimization. We succeeded to increase effectively the intensity from a hydrogen moderator by introducing the heavy water pre-moderator. As a new type moderator we examined HD and CH3D moderators and got information about the neutron characteristics on the partially deuterated material.We measured the neutronic performance of LANSCE at Los Alamos, the second highest power spallation source in the world. We could check the validity of the simulation and get information on ortho-para transition at high radiation field.We have obtained very useful information on the design of the new spallation neutron sources in Japan, which is also useful for other future spallation sources.

日本和美国正在建设MW级的高功率散裂中子源，欧洲正在规划5MW级的高功率散裂中子源。设施的中子产生部分（靶/慢化剂/反射器系统：TMRS）最为重要，因为它决定了设施的性能。在这个项目中，我们研究了TMRS并得到了如下结果。我们可以通过与Los Alamos合作引入新的模拟代码，它是一个非常强大的优化工具。通过引入重水预慢化剂，我们成功地有效提高了氢慢化剂的强度。作为一种新型慢化剂，我们检查了 HD 和 CH3D 慢化剂，并获得了有关部分氘化材料的中子特性的信息。我们在洛斯阿拉莫斯（世界第二高功率散裂源）测量了 LANSCE 的中子性能。我们可以检查模拟的有效性并获得高辐射场下的邻位-对位跃迁信息。我们获得了有关日本新型散裂中子源设计的非常有用的信息，这对于未来其他散裂源也很有用。

项目成果

Y.Ogawa: "Intensity enhancement of cold neutrons from a coupled liquid-hydrogen moderator for pulsed cold neutron sources"Nuclear Instrument and Methods in Physics Research. A432. 415-421 (1999)

Y.Okawa：“用于脉冲冷中子源的耦合液氢慢化剂的冷中子强度增强”物理研究中的核仪器和方法。

Gary J.Russell: "The Lujan Center : A Pulsed Spallation Neutron Source at Los Alamos"the Proceedings of ICONE-8. ICONNE-8611. 1-12 (2000)

Gary J.Russell：“卢扬中心：洛斯阿拉莫斯的脉冲散裂中子源”ICONE-8 会议记录。

Y. Kiyanagi: "How to Optimize Pulse Shape"Proceedings of the 15^<th> Meeting of the International Collaboration on Advanced Neutron Sources. Vol. II. 701-712 (2001)

Y. Kiyanagi：“如何优化脉冲形状”先进中子源国际合作第 15 次会议记录。

M. Kawai, T. Ino, N. Torikai, T. Kamiyama, M. Furusaka, Y. Kiyanagi, M. Ooi, K. Fukunaga: "Renewal of KENS TMRA and Its Performance"Physica-B. (To be published).

M. Kawai、T. Ino、N. Torikai、T. Kamiyama、M. Furusaka、Y. Kiyanagi、M. Ooi、K. Fukunaga：“KENS TMRA 的更新及其性能”Physica-B。

P.D.Ferguson: "Re-analysis of the Belyakov-Bodin Energy Deposition Experiment Using MCNPX"the proceedings of AccApp 2000. (to be published) .

P.D.Ferguson：“使用 MCNPX 重新分析 Belyakov-Bodin 能量沉积实验”AccApp 2000 的会议记录。（待出版）。