Fundamental SRF Research into Niobium and New Materials

铌及新材料的基础 SRF 研究

• 批准号: SAPEQ-2015-00005
• 负责人: Laxdal, Robert
• 金额: $ 6.19万
• 依托单位: TRIUMF
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Research Tools and Instruments
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=614378
• 关键词: Fundamental; SRF; Research; into; Niobium

This grant request is for equipment which will put the proponents at the forefront of the development of new materials and new processing techniques for superconducting radio-frequency (SRF) cavities for use in particle accelerators. Developments will include the production and testing of Nb3Sn samples and cavities as well as developing and optimizing the performance of bulk Nb. The proposal goal is to secure a critical mass of equipment to enable breakthroughs that attack the major questions facing the SRF community today. The present proposal is calling for funds to add equipment to leverage existing SRF and material science infrastructure. For sample characterization unique in the world a new spectrometer would be added to the beta-NMR facility ($147k). The facility would allow measurements of the magnetic field penetration in the sample near the limits of the Meissner state as a function of depth through the London layer. Further diagnosis of samples would be done with the addition of a sample testing resonant cavity ($88k) that would be used to test the samples with rf fields to compare fundamental characterizations in beta-NMR with rf measurements. Particular heat treatments developed through beta NMR and the rf sample cavity would then be applied to single cell 1.3GHz cavities using an rf induction oven (existing) for testing in the TRIUMF multi-purpose cryostat. Funds would be used to complete the data acquisition system ($65K) to allow complete cavity characterization of single cell cavities of each of the new treatments. The T-map would ensure that the cavity test, a global measurement, is indicative of the treatment and not a local hot spot due to systematic loss. An upgrade to the multi-purpose cryostat ($15k) would be done to utilize the T-map system. In addition to cavity rf tests at 1.3GHz we propose to fabricate two coaxial resonators ($149k) that would also fit into the rf induction oven and would allow unique tests on the performance of cavity treatments at frequencies from 200MHz to 1.2GHz. The rf induction oven would also be used to develop Nb3Sn coating methods by the addition of a new insert ($36k). Initially samples would be produced and tested in beta-NMR and the rf sample cavity. Later single cell 1.3GHz cavities and the coaxial resonator would be coated to look at the effectiveness of Nb3Sn as a function of frequency and geometry. The total funds request is $499k over three years. The proposed research equipment would produce a truly unique center for fundamental SRF research where precise probes of magnetism at the London layer are coupled with rf sample testing cavities and the results extended to whole cavities to give a complete picture of the mechanisms behind rf losses over a broad rf frequency range. At the core of the equipment request is the quest to make a breakthrough. Through this quest students and young professionals will be trained while pursuing solutions to compelling questions.

这项拨款申请是为了设备，这将使支持者在开发新材料和新的处理技术的最前沿超导射频（SRF）腔用于粒子加速器。开发工作将包括Nb 3Sn样品和腔体的生产和测试，以及开发和优化块体Nb的性能。该提案的目标是确保设备的临界质量，以实现突破，解决SRF社区今天面临的主要问题。 目前的提案要求提供资金，以增加设备，利用现有的SRF和材料科学基础设施。为了进行世界上独一无二的样品表征，将在β-NMR设施中增加一台新的分光计（14.7万美元）。该设备将允许测量磁场渗透在样品附近的迈斯纳状态的极限作为深度的函数通过伦敦层。样品的进一步诊断将通过添加样品测试谐振腔（88 k美元）来完成，该谐振腔将用于使用射频场测试样品，以比较β-NMR中的基本表征与射频测量。通过β NMR和射频样品腔开发的特定热处理将应用于使用射频感应炉（现有）的单电池1.3GHz腔，用于在TRIUMF多用途低温恒温器中进行测试。资金将用于完成数据采集系统（6.5万美元），以便对每种新治疗方法的单细胞腔进行完整的腔表征。T-map将确保腔测试（全局测量）指示治疗，而不是由于系统性损失导致的局部热点。将对多用途低温恒温器（1.5万美元）进行升级，以利用T-map系统。除了在1.3GHz的腔体射频测试外，我们还建议制造两个同轴谐振器（14.9万美元），这两个谐振器也可以安装在射频感应炉中，并可以在200 MHz至1.2GHz的频率下对腔体处理的性能进行独特的测试。射频感应炉还将用于开发Nb 3Sn涂层方法，增加了一个新的插件（3.6万美元）。最初，样品将在β-NMR和RF样品腔中生产和测试。后来的单电池1.3GHz腔和同轴谐振器将被涂覆，以观察Nb 3Sn作为频率和几何形状的函数的有效性。三年内的总资金要求为49.9万美元。 拟议中的研究设备将产生一个真正独特的中心的基础SRF的研究，在伦敦层的磁性的精确探针耦合与RF样品测试腔和结果扩展到整个腔，以给出一个完整的图片背后的机制，在一个广泛的RF频率范围内的RF损耗。装备要求的核心是寻求突破。通过这一探索，学生和年轻的专业人员将得到培训，同时寻求解决引人注目的问题。