An innovative monochromator shielding is designed and implemented for the cold neutron spectrometers XINGZHI and BOYA operated by Renmin University of China at China Advanced Research Reactor.Via Monte Carlo simulatio...An innovative monochromator shielding is designed and implemented for the cold neutron spectrometers XINGZHI and BOYA operated by Renmin University of China at China Advanced Research Reactor.Via Monte Carlo simulations and careful mechanical designs,a shielding configuration has been successfully developed to satisfy safety requirements of below 3μSv/h dose rate at its exterior,meanwhile fulfilling space,floor load and nonmagnetic requirements.Composite materials are utilized to form the sandwich-type shielding walls:the inner layer of boron carbide rubber,the middle layer of steel-encased lead and the outer layer of borated polyethylene.Special-shaped liftable shielding blocks are incorporated to facilitate a continuous adjustment of the neutron energy while preventing radiation leakage.Our work has demonstrated that by utilizing composite shielding materials,along with the sandwich structure and liftable shielding blocks,a compact and lightweight shielding solution can be achieved.This enables the realization of advanced neutron scattering instruments that provide expanded space of measurement,larger energy and momentum coverage,and higher flux on the sample.This shielding represents the first of its kind in neutron scattering instruments in China.Following its successful operation,it has been subsequently employed by other neutron instruments across the country.展开更多
针对本课题组自主研制的抽注水多层同心球中子谱仪缺乏手机端控制软件的问题,基于Android Studio 4.2平台设计开发了抽注水多层同心球中子谱仪控制助手APP。该APP通过WiFi通信实现与下位机之间的数据传输,采用多线程技术实现了用户管理...针对本课题组自主研制的抽注水多层同心球中子谱仪缺乏手机端控制软件的问题,基于Android Studio 4.2平台设计开发了抽注水多层同心球中子谱仪控制助手APP。该APP通过WiFi通信实现与下位机之间的数据传输,采用多线程技术实现了用户管理、水层管理、设备监控、系统设置、数据管理等功能,可自由实现控制一个或多个水层组合状态。经测试,所设计的APP运行流畅、界面简洁、人机交互友好,提升了操作的便捷性,具有较好的实用性,能够满足手机控制抽注水多层同心球中子谱仪中球层抽水和注水的控制需求,进一步完善了抽注水多层同心球中子谱仪系统。展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.12004426,U2030106,and 12304185)the National Key Scientific Instrument and Equipment Development Project of NSFC(Grant No.11227906)the National Key R&D Program of China(Grant No.2023YFA1406500)。
文摘An innovative monochromator shielding is designed and implemented for the cold neutron spectrometers XINGZHI and BOYA operated by Renmin University of China at China Advanced Research Reactor.Via Monte Carlo simulations and careful mechanical designs,a shielding configuration has been successfully developed to satisfy safety requirements of below 3μSv/h dose rate at its exterior,meanwhile fulfilling space,floor load and nonmagnetic requirements.Composite materials are utilized to form the sandwich-type shielding walls:the inner layer of boron carbide rubber,the middle layer of steel-encased lead and the outer layer of borated polyethylene.Special-shaped liftable shielding blocks are incorporated to facilitate a continuous adjustment of the neutron energy while preventing radiation leakage.Our work has demonstrated that by utilizing composite shielding materials,along with the sandwich structure and liftable shielding blocks,a compact and lightweight shielding solution can be achieved.This enables the realization of advanced neutron scattering instruments that provide expanded space of measurement,larger energy and momentum coverage,and higher flux on the sample.This shielding represents the first of its kind in neutron scattering instruments in China.Following its successful operation,it has been subsequently employed by other neutron instruments across the country.
文摘针对本课题组自主研制的抽注水多层同心球中子谱仪缺乏手机端控制软件的问题,基于Android Studio 4.2平台设计开发了抽注水多层同心球中子谱仪控制助手APP。该APP通过WiFi通信实现与下位机之间的数据传输,采用多线程技术实现了用户管理、水层管理、设备监控、系统设置、数据管理等功能,可自由实现控制一个或多个水层组合状态。经测试,所设计的APP运行流畅、界面简洁、人机交互友好,提升了操作的便捷性,具有较好的实用性,能够满足手机控制抽注水多层同心球中子谱仪中球层抽水和注水的控制需求,进一步完善了抽注水多层同心球中子谱仪系统。
