A High Power, Broadband 395 GHz Gyrotron Amplifier for DNP-NMR and EPR Spectroscopy

用于 DNP-NMR 和 EPR 光谱分析的高功率宽带 395 GHz 回旋放大器

基本信息

批准号：
10010144
负责人：
Thorsten Maly
金额：
$ 36.59万
依托单位：
BRIDGE 12 TECHNOLOGIES, INC.
依托单位国家：
美国
项目类别：
财政年份：
2020
资助国家：
美国
起止时间：
2020-06-10 至 2021-05-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10010144
关键词：
Academia Amplifiers Analytical Chemistry Area Benchmarking Biological Cell Nucleus Code Communities Complex Crystallization Development Devices Dimensions Electron Spin Resonance Spectroscopy Electrons Elements Foundations Frequencies Funding Generations Guns Hour Industry Laboratories Magic Magnetism Measurement Mechanics Membrane Methods NMR Spectroscopy Noise Nuclear Nuclear Magnetic Resonance Output Performance Pharmaceutical Chemistry Phase Physics Physiologic pulse Production Property Proteins Research Research Personnel Resolution Running Sales Sampling Signal Transduction Source Structural Models Structure System Technology Testing Time Travel Tube United States National Institutes of Health Vacuum X-Ray Crystallography data acquisition design electrical property enhancing factor experimental study instrumentation interest irradiation microwave electromagnetic radiation models and simulation next generation novel operation programs protein structure prototype simulation software development software systems solid state solid state nuclear magnetic resonance transmission process vector

项目摘要

Project Summary / Abstract We propose to develop a novel gyro traveling wave tube amplifier (gyro-TWT) at 395 GHz with an output power of 500 W and an operating bandwidth exceeding 3 GHz and a small signal gain > 45 dB. The amplifier will be used in Dynamic Nuclear Polarization (DNP) enhanced Nuclear Magnetic Resonance (DNP-NMR) experiments and Electron Paramagnetic Resonance (EPR) experiments. The output power of the proposed amplifier is three orders greater than those available from solid-state sources at similar frequencies and the operating bandwidth combined with the ability to coherently amplify complex input signals for use in DNP-NMR and EPR will enable new generation of pulsed DNP-NMR and EPR experiments that are currently impossible to perform with free running fixed frequency oscillators. This amplifier can upgrade the currently deployed dozens of gyrotron oscillators for use in DNP-NMR and provide researchers with the ability of conducting experiments with a broad range of polarizing agents without the need for a superconducting sweep coils in the NMR magnet. Also, the amplifier will enable researchers to explore the promise of pulsed DNP-NMR experiments. The proposed amplifier can be operated with a peak power 500 W with a duty factor of 10 % or in continuous wave mode with an output power of 50 W. In Phase I, we will design the amplifier system and perform detailed modeling and simulation of its performance using benchmarked state-of-the-art design codes used in microwave tube research. We will present a complete mechanical design of the system and verify the thermal and electrical properties using commercial finite element codes. We will also build and test the cold performance of the most important element of the system, namely, the interaction circuit and demonstrate its suitability for integration with the tube. These tests will be performed on a Vector Network Analyzer to verify the microwave propagation properties of the device. In Phase II, we will fabricate the electron gun, the internal mode converter and other auxiliary components such as microwave windows etc. The entire system will be integrated and tested in our laboratory to demonstrate the proposed output power and bandwidth.

项目概要/摘要我们建议开发一种新型陀螺行波管放大器（陀螺行波管放大器），频率为 395 GHz，输出为功率为 500 W，工作带宽超过 3 GHz，小信号增益 > 45 dB。放大器将用于动态核极化（DNP）增强核磁共振（DNP-NMR）实验和电子顺磁共振（EPR）实验。建议的输出功率放大器比相似频率下固态源的放大器大三个数量级，并且工作带宽与相干放大复杂输入信号的能力相结合，用于 DNP-NMR EPR 将使目前不可能的新一代脉冲 DNP-NMR 和 EPR 实验成为可能与自由运行的固定频率振荡器一起执行。该放大器可以升级当前部署的数十个用于 DNP-NMR 的回旋管振荡器，为研究人员提供了进行使用多种偏振剂进行实验，无需超导扫描线圈核磁共振磁铁。此外，该放大器将使研究人员能够探索脉冲 DNP-NMR 的前景实验。所提出的放大器可在 500 W 峰值功率、10 % 占空比下运行连续波模式，输出功率为50 W。在第一阶段，我们将设计放大器系统并对其进行详细的建模和仿真使用微波管研究中使用的最先进的基准设计代码来评估性能。我们将提出系统的完整机械设计并使用以下方法验证热性能和电性能商业有限元代码。我们还将构建并测试最重要的冷性能系统的元件，即交互电路，并证明其与集成的适用性管子。这些测试将在矢量网络分析仪上执行，以验证微波传播设备的属性。第二阶段，我们将制作电子枪、内模转换器等辅助部件，如微波窗口等。整个系统将在我们的集成和测试实验室演示建议的输出功率和带宽。