The X-Band resonators have been designed for FT-EPR and transient EPR experiments. Additional modulation coils allow CW operation and easy change between FT- and CW-EPR. The L-Band Flexline resonator is recommended if the available sample volume is limited or large B1 is required for saturation experiments.
The modular Flexline resonators are a unique solution for the demands in CW- and FT-EPR. They are the backbone of all pulse-EPR applications with the multi-frequency & multi-resonance ELEXSYS platform. A common feature of the Flexline probes is their high filling factor with correspondingly high sensitivity.
All Flexline resonators share the same cryogenics systems.
All Flexline probes are also available for CW-EPR with the EMX spectrometer series
Dielectric Ring Resonator ER 4118X-MD5
The ER 4118X-MD5 is the universal probe of the ELEXSYS E 580 CW/FT-EPR X-Band spectrometer. It accepts sample tubes up to 5 mm O.D. and generates π/2-pulses of 10 ns at a bandwidth of 500 MHz. Due to its high filling factor it provides a high sensitivity even at the large bandwidth (low Q) required for FT-EPR spectroscopy.
Quick and easy sample changing is a standard feature at all temperatures even in high power operation. Ease of use is thereby greatly enhanced.
The resonator Q-factor can be changed continuously from very high to very low by varying the degree of coupling. This feature allows to match the resonator bandwidth to the specific experimental task, i.e. the lowest Q for the shortest dead-time and largest bandwidth, or a Q matched to the spin relaxation time for maximum signal-to-noise or critically coupled for CW-EPR.
The versatility is further enhanced by the (optional) optical window which allows irradiation of the total active resonator volume. The optical transparency is better than 90% in the range from 200 nm to 5 µm.
Pulse-ENDOR Resonator EN 4118X-MD4
This resonator is an integral part of the E 560D-P DICE pulsed ENDOR accessory. It provides a constant nuclear spin flip angle over a very large frequency range, greatly simplifying optimisation of the ENDOR signal and facilitating automated multiple dimension experiments. The EPR performance is as superior as with the ER 4118X-MD5 dielectric ring resonator. more
Split Ring Resonators ER 4118X-MS5/3/2
The split ring resonators have been designed for special experimental requirements. They generate the highest B1, provide the largest bandwidth, have the highest sensitivity for the tiniest samples, feature the highest time resolution and the lowest dead-time. The ideal choice for:
Three X-band Split Ring resonators ER 4118X-MS5/3/2 are available with maximum sample access of 5 mm, 3 mm and 2 mm respectively.
Q-Band Pulse EPR & ENDOR Resonator EN 5107D2
Together with the ELEXSYS SuperQ-FT system, this resonator provides ideal tool for pulsed multiresonance EPR experiments at 34 GHz. more
L- and S-Band Split Ring Resonators
The concept of the high filling factor is even more important for low frequency EPR. Therefore the Flexline design has been extended to L- and S-Band.
ER 4118L-MS5 L-Band module with 5 mm sample access
ER 4118S-MS5 S-Band module with 5 mm sample access
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