26.5-40 GHz Ka-band pulsed EPR spectrometer
26.5-40 GHz Ka-band pulsed EPR spectrometer
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DOI：
10.1002/cmr.b.20064
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发表时间：
2006-08-01
影响因子：
0.9
通讯作者：
Raitsimring, A.
中科院分区：
文献类型：
--
作者：
Astashkin, A. V.;Enemark, J. H.;Raitsimring, A.
介绍了一种新型国产k -a波段脉冲电子顺磁共振谱仪的设计和性能。该光谱仪的独特之处在于它是宽带的，允许在26.5至40 GHz范围内的任何工作频率下进行实验。该光谱仪采用的高功率微波放大器使我们能够使用低质量因数的谐振器，并实现最小反转微波脉冲持续时间为11 ns。因此，该光谱仪可用于各种类型的脉冲EPR实验，包括电子自旋回波包络调制（ESEEM）、电子-核双共振（ENDOR）和电子-电子双共振（ELDOR），泵送频率和观测频率之间的差异可达数百兆赫兹。时序由任意波形发生器控制，具有12个数字输出和1ns时间分辨率。光谱仪控制/数据采集软件是家庭编写的，允许使用扫描定义表轻松实现任何一维或二维实验。(C) 2006 Wiley期刊有限公司
The design and performance of a new homebuilt K-a-band pulsed electron paramagnetic resonance (EPR) spectrometer is described. The spectrometer is unique in that it is broadband and allows experiments to be performed at any operational frequency within the range from 26.5 to 40 GHz. The high-power microwave amplifier employed in this spectrometer allowed us to use resonators with low quality factor and to achieve a minimum inversion microwave pulse duration of 11 ns. As a result, this spectrometer can be used for all types of pulsed EPR experiments, including electron spin echo envelope modulation (ESEEM), electron - nuclear double resonance (ENDOR), and electron-electron double resonance (ELDOR) with a difference between the pumping and observation frequencies of up to several hundred megahertz. The timing is controlled by an arbitrary waveform generator with 12 digital outputs and 1 ns time resolution. The spectrometer control/data acquisition software is home-written and allows an easy implementation of any one- or two-dimensional experiment using sweep definition tables. (C) 2006 Wiley Periodicals, Inc.