Avdievich N I, Gerfen G J
Department of Physiology and Biophysics, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, New York 10461, USA.
J Magn Reson. 2001 Dec;153(2):178-85. doi: 10.1006/jmre.2001.2450.
The design, construction, and performance of a multifrequency pulsed EPR and ENDOR probe for use at cryogenic temperatures are described. Interchangeable resonators based on a folded strip line design allow variation of the resonance frequency over a range of 5-11 GHz. Variable coupling to the resonator is achieved capacitively via a simple mechanical adjustment which is thermally and mechanically stable. The entire assembly is robust and easily fabricated. Common methods of analyzing the resonator parameters such as the Q-factor and coupling coefficient are discussed quantitatively. Probe performance data and multifrequency pulsed ENDOR spectra are presented.
本文描述了一种用于低温环境的多频脉冲电子顺磁共振（EPR）和电子核双共振（ENDOR）探头的设计、构造及性能。基于折叠带状线设计的可互换谐振器能使共振频率在5 - 11 GHz范围内变化。通过简单的机械调节实现与谐振器的可变电容耦合，该调节在热学和力学上都很稳定。整个组件坚固耐用且易于制造。文中定量讨论了分析谐振器参数（如品质因数和耦合系数）的常用方法。还给出了探头性能数据和多频脉冲ENDOR谱。
