Improving B1 field homogeneity in dielectric tube resonators for EPR spectroscopy via controlled shaping of the dielectric insert

Victoria N. Syryamina, Anna G. Matveeva, Yan V. Vasiliev, Anton Savitsky, Yuri A. Grishin

Результат исследования: Научные публикации в периодических изданияхстатья

Аннотация

We propose an approach for improving the homogeneity of microwave magnetic field amplitude in a dielectric tube resonator for electron paramagnetic resonance spectroscopy at X-band. The improvement is achieved by “shaping” (controllable variation of the outer diameter of a dielectric insert along its axial direction). Various shaping scenarios based on the principle of discrete solenoids and electromagnetic calculations have been considered. The dielectric insert having the most promising shape was manufactured from a bismuth germanate single crystal. The shaped insert increases the area at B1 > 0.9 B1max from 5.06 to 7.36 mm. Higher sensitivity and lower likelihood of quantitative errors have been achieved in pulse EPR experiments for “long” samples (whose length was comparable to that of the dielectric insert) in a shaped dielectric insert.

Язык оригиналаанглийский
Номер статьи106685
Число страниц11
ЖурналJournal of Magnetic Resonance
Том311
DOI
СостояниеОпубликовано - фев 2020

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