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SUMMARY:EPR spectroscopy station at the Novosibirsk Free Electron Laser: a
 pplication of high-power THz radiation in the field of molecular magnetism
DTSTART;VALUE=DATE-TIME:20200714T100000Z
DTEND;VALUE=DATE-TIME:20200714T102000Z
DTSTAMP;VALUE=DATE-TIME:20260419T150319Z
UID:indico-contribution-1007@indico.inp.nsk.su
DESCRIPTION:Speakers: Sergey Veber (International Tomography Center SB RAS
 )\nIn this work we present the current status of CW and TR EPR station at 
 NovoFEL [1]. The detailed layout of the experimental user station is shown
  and discussed. While the CW and TR EPR X-band (9 GHz) spectrometer used i
 s almost the same as in many EPR laboratories\, it was built in the NovoFE
 L beamline and allows performing the unique EPR experiments with simultane
 ous irradiation of the sample by common UV-vis and exceptional NovoFEL lig
 ht. For this purpose\, multimodal THz waveguide allowing to fed NovoFEL ra
 diation directly into the EPR resonator is used. Laser radiation of NovoFE
 L is passed through the collimator based on two off-axis parabolic mirrors
  which compress the beam diameter by a factor of 15 adjusting it to the ap
 erture of THz waveguide used in EPR spectrometer. Electronic modulation sy
 stem for NovoFEL radiation is used to decrease the average power by a fact
 or of 100 or even higher while keeping the maximum accessible peak power[2
 ]. Passed through the collimator and optical chopper\, the NovoFEL radiati
 on can be readily directed to the sample into EPR resonator. Different det
 ection schemes of experiments conditioned by the initial time profile of N
 ovoFEL radiation\, its electronic modulation and the capability (CW and TR
 ) of EPR spectrometer used are discussed. Special attention is drawn to th
 e heat effect and its practical use for the temperature-modulated detectio
 n of very broad EPR spectra [3].   \n  \nReferences   \n  \n[1] G.N. Kulip
 anov\, E.G. Bagryanskaya\, et al.\, IEEE T THz Sci Techn\, 2018\, 5\, 798.
    \n  \n[2] S.L. Veber\, S.V. Tumanov\, et al.\, J Magn Reson\, 2018\, 28
 8\, 11.   \n  \n[3] O.A. Shevchenko\, A.R. Melnikov\, et al.\, Materials 2
 019\, 12\, 3063.   \n  \nAcknowledgements   \n  \nThis work has been suppo
 rted by the Russian Science Foundation (no. 17-13-01412).\n\nhttps://indic
 o.inp.nsk.su/event/24/contributions/1007/
LOCATION:Zoom Zoom 860 5034 1820
URL:https://indico.inp.nsk.su/event/24/contributions/1007/
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