#BRUKER EPR STANDARDS FULL#

This spectrometer is equipped with a choice of X-band and Q-band bridges and microwave resonators. Automatic digital tuning of the modulation coils (at frequencies greater than 50 kHz) eliminates the need for the classical 'tuning box' for each cavity.ДЄccessories for (i) variable temperature EPR (1.5в€’1200 K) (ii) optically excited EPR (200в€’1100 nm) (iii) electron nuclear double resonance (ENDOR) and (iv) precise sample orientation automated using one and two circle goniometers are available. The calibration routine automatically calibrates these quantities and stores them on hard disk for future use. Measurement reproducibility and precision, essential for any quantitative EPR study, are ensured even for the novice user through precise calibration of the modulation amplitude and phase. The modulation frequency can be set with a resolution of 0.01 kHz. This EMX has a single signal channel, operating between 6 and 100 kHz with excellent phase resolution and stability. Any errors or drift from temperature effects at the hall probe are avoided by active temperature control of the Hall probe.

#BRUKER EPR STANDARDS FULL#

The EMX 032 provides full sweep capability in the range of 0 to maximum field in 50 mG steps with a resolution of 12 bits. The calibration is loaded into the memory of the controller to guarantee a highly linear field sweep. The field controller is calibrated against an NMR gaussmeter. The accuracy of this unit is unparalleled for Hall effect based field controllers, providing you with precise and reproducible measurement of line widths, splittings and g-values. The E 032 field controller provides accurate field control with excellent long term stability, allowing you to signal average extensively to pull your weak signals out of the noise. The pole gap is 62 mm and the maximum attainable field is approximately 0.64 Tesla. The spectrometer is equipped with an ER070 Bruker magnet and ER080 magnet power supply. Its autotune capabilities make it as easy to use as a standard cavity. The cavity provides outstanding performance with powder, single crystal and even aqueous samples. Combined with a specially tuned low noise Gunn source bridge, and the SignalMaster, the SHQE provides the ultimate in sensitivity. The new Bruker Super High QE (SHQE) cavity combines a super high Q (Q u>25000) with a large filling factor and large modulation coils. Classical high Q cavities such as the cylindrical TE 011 have relatively poor filling factors, thus reducing the effect of their high Q. The filling factor is the ratio of the integral of the microwave field over the sample volume relative to the integral of the total microwave field in the cavity. However, you also need to consider the cavity's filling factor and the quality of the microwave source.

Generally, a higher Q means higher sensitivity. The quality factor (Q) of the resonator acts like an amplifier for both the incident power and the signal. The spectrometer in standard configuration is equipped with a Bruker Super High QE (SHQE) cavity resonator (ER 4123SHQE). Readout to 3 digits (or to a resolution of 1 kHz with external frequency counter), protection against damage through user error, output power (max 200 mw levelled) can be stepped in 1dB increments (with an accuracy of typically /- 0.2 dB from 0 dB to 60 dB), direct digital power readout in mW, ВµW, or nW and incorporates a high dynamic range AFC frequency lock, with frequency response and gain matched to the source oscillator characteristics. This microwave bridge is fully remotely controlled and provides coarse frequency This EMX spectrometer operates at 9.2 - 9.8 GHz with a microwave bridge incorporating the latest state-of-the-art technology to provide the highest sensitivity measurements. For high power DNP experiments the system performance is enhanced with a 100 W EIK microwave amplifier. Experiments can be performed at temperatures between 3.7 and 300 K. Our ELEXSYS E680 is equipped for High-Frequency/High-Field CW/pulsed EPR and ENDOR at 94 GHz. Pulse-ENDOR to measure hyperfine interactions and nuclear spin relaxation.Pulse-ELDOR and DEER to measure long range distances by electron-electron spin dipolar coupling.SECSY and EXSY to measure correlations and exchange rates.ESEEM and 2D-HYSCORE to measure spin density distribution and distances through the hyperfine interaction between electron and nuclear spins.FT-EPR and Electron Spin Echo techniques as the basic detectors for the EPR spectrum and electron spin relaxation times.

Bruker epr standards