MRI: Acquisition of a Cryogen-free dilution refrigerator with a 12 T magnet

MRI：购买带有 12 T 磁铁的无冷冻剂稀释冰箱

• 批准号: 1126061
• 负责人: Mansour Shayegan
• 金额: $ 43.6万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-10-01 至 2015-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1126061&HistoricalAwards=false
• 关键词: MRI; Acquisition; Cryogen; free; dilution

AbstractIntellectual Merit -- The goal of this project is to acquire and set up a cryogen-free dilution refrigerator with a base temperature of about 0.010 Kelvin and a superconducting magnet with a maximum field of 12 Tesla. This equipment will be shared by eight Principal Investigators and collaborators, and will be used by their graduate and undergraduate students, post-docs and research staff. It will be initially devoted to measurements of electronic properties of low-dimensional semiconductor structures, topological insulators, and graphene. All these material systems are at the forefront of current, fundamental solid state physics and device research. They also have potential transformative applications, e.g., in quantum computing and information processing. The cryogen-free system will enhance the research on these materials in several crucial ways: (1) It will allow measurements at low temperatures and in tilted magnetic fields to learn exciting new physics. (2) Because the operation of the proposed equipment is much simpler than the conventional dilution refrigerators, it will tremendously enhance the efficiency of the measurements and research progress. (3) It will allow the inclusion of undergraduate students in research projects more easily. (4) It will replace our existing equipment which is instrumental to our research but is over 20 years old, has frequent problems, and does not reach below about 0.03 Kelvin. (5) Each year it will save over $100,000 worth of materials (liquid Helium) cost. This will have a huge impact on the ability to make measurements and produce new results more efficiently. (6) It will save Helium, a precious noble gas.Broader Impacts -- The impact of the proposed project will be seen in the scientific community and beyond. Results of the research will be communicated through publications and conference presentations to the specialized as well as general science and engineering communities. While the subject of this project is fundamental, progress in this area will benefit society in the long term as it may lead to novel, transformative concepts for electronic materials and devices and information processing systems whose operation relies on quantum and/or interaction phenomena. The project incorporates a high quality and comprehensive educational component. The PIs are dedicated to the education of both graduate and undergraduate students. They all have typically small groups (4 to 6) of students, and their belief is that doing good quality research, with close supervision, is the best way to teach beyond textbooks and problem sets. The project will therefore result in the education of students in critical, state-of-the art areas of science and technology, including the fabrication, characterization, and physics of high quality layered semiconductor structures and other novel materials such as topological insulators and graphene. Well-trained students in these fields will be invaluable resources for the US as well as for the rest of the world. The PIs will also make every effort to attract to this project students from underrepresented groups.The PIs are committed to a broader education of the public in science and engineering. Some of the topics and results of this project will be incorporated into undergraduate and graduate courses that they teach at Princeton University. The PIs will also participate in various K-12 demonstrations and teacher training programs in electricity and magnetism and in cryogenic temperatures, general areas that are closely linked to the topic of this proposal. These activities include training sessions, kit development, and demonstrations at regional schools and at Princeton University.

AbstractIntellectual功绩 - 该项目的目的是获取和建立一个无低温稀释冰箱，其基本温度约为0.010 Kelvin和一个最大磁场为12 Tesla的超导磁铁。该设备将由八名主要研究人员和合作者共享，并将由他们的研究生和本科生，毕业后和研究人员使用。它最初将致力于测量低维半导体结构，拓扑绝缘子和石墨烯的电子性质。所有这些材料系统都处于当前，基本固态物理和设备研究的最前沿。它们还具有潜在的变革性应用程序，例如在量子计算和信息处理中。 无冰冻系统将以几种关键的方式增强对这些材料的研究：（1）它将允许在低温和倾斜磁场中进行测量，以学习令人兴奋的新物理学。 （2）由于提出的设备的运行要比常规稀释冰箱要简单得多，因此它将极大地提高测量和研究进度的效率。 （3）这将使本科生在研究项目中纳入本科生。 （4）它将取代我们现有的设备，该设备对我们的研究起到了重要作用，但已有20多年的历史，经常出现问题，并且不到约0.03 Kelvin。 （5）每年将节省价值超过100,000美元的材料（液态氦）成本。这将对进行测量并更有效地产生新结果的能力产生巨大影响。 （6）它将节省氦气，这是一种珍贵的贵族煤气。公开的影响 - 拟议项目的影响将在科学界及其他地区看到。 该研究的结果将通过出版物和会议演讲传达给专业的科学和工程社区。尽管该项目的主题是基本的，但该领域的进步将在长期内使社会受益，因为它可能导致电子材料和设备的新颖，变革性的概念以及信息处理系统的运作依赖于量子和/或交互现象。该项目结合了高质量和全面的教育组成部分。 PI致力于研究生和本科生的教育。 他们通常都有小组（4至6个）的学生，他们的信念是，在密切的监督下进行高质量的研究是教授教科书和问题集的最佳方法。 因此，该项目将导致学生在重要，最先进的科学技术领域的教育，包括高质量分层半导体结构的制造，表征和物理学以及其他新型材料，例如拓扑绝缘子和石墨烯。这些领域训练有素的学生对于美国以及世界其他地区都是宝贵的资源。 PI还将尽一切努力吸引来自代表性不足的群体的该项目。PIS致力于对公众进行科学和工程的更广泛的教育。该项目的一些主题和结果将纳入他们在普林斯顿大学任教的本科和研究生课程中。 PI还将参加各种K-12演示和磁性和磁性的教师培训计划以及低温温度，这与该提案的主题紧密相关的一般领域。这些活动包括培训课程，套件开发和地区学校和普林斯顿大学的示威活动。