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

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Improving B₁ field homogeneity in dielectric tube resonators for EPR spectroscopy via controlled shaping of the dielectric insert. / Syryamina, Victoria N.; Matveeva, Anna G.; Vasiliev, Yan V. et al.

In: Journal of Magnetic Resonance, Vol. 311, 106685, 02.2020.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{d55e22fcf28d4425b31488705ff371a4,

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

abstract = "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.",

keywords = "Dielectric resonator, EPR, Homogeneity of microwave magnetic field amplitude, SIGNAL, BGO CRYSTALS, MODEL, ENVELOPE MODULATION, ELECTRON-SPIN ECHO, FREE-RADICALS, ELDOR, RESONANCE, HYPERFINE, PULSED ELECTRON",

author = "Syryamina, {Victoria N.} and Matveeva, {Anna G.} and Vasiliev, {Yan V.} and Anton Savitsky and Grishin, {Yuri A.}",

year = "2020",

month = feb,

doi = "10.1016/j.jmr.2020.106685",

language = "English",

volume = "311",

journal = "Journal of Magnetic Resonance",

issn = "1090-7807",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Improving B1 field homogeneity in dielectric tube resonators for EPR spectroscopy via controlled shaping of the dielectric insert

AU - Syryamina, Victoria N.

AU - Matveeva, Anna G.

AU - Vasiliev, Yan V.

AU - Savitsky, Anton

AU - Grishin, Yuri A.

PY - 2020/2

Y1 - 2020/2

N2 - 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.

AB - 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.

KW - Dielectric resonator

KW - EPR

KW - Homogeneity of microwave magnetic field amplitude

KW - SIGNAL

KW - BGO CRYSTALS

KW - MODEL

KW - ENVELOPE MODULATION

KW - ELECTRON-SPIN ECHO

KW - FREE-RADICALS

KW - ELDOR

KW - RESONANCE

KW - HYPERFINE

KW - PULSED ELECTRON

UR - http://www.scopus.com/inward/record.url?scp=85078130925&partnerID=8YFLogxK

U2 - 10.1016/j.jmr.2020.106685

DO - 10.1016/j.jmr.2020.106685

M3 - Article

C2 - 31981782

AN - SCOPUS:85078130925

VL - 311

JO - Journal of Magnetic Resonance

JF - Journal of Magnetic Resonance

SN - 1090-7807

M1 - 106685

ER -

ID: 23259683