Facilities

EPR Spectrometers



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X-band CW EPR spectrometer (Bruker EMX)

• microwave frequency ~10 GHz

• temperature 3-300 K

• field range 0.005-0.5 T

• resonators 1 and 2, (rectangular resonators)



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X/W-band pulse/cw spectrometer (Bruker ElexSys E680)

At X-band

• microwave frequency ~ 10 GHz

• temperature 2–300 K

• magnetic field 0-1.55 T

• resonator 1-5 (rectangular cavity, dielectric ring, dielectric ring ENDOR, split-ring)

At W-band

• microwave frequency ~ 94 GHz

• temperature 3.8-300 K

• magnetic field 0-6 T

• resonator 6



Resonators

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Some useful information about the resonators available and the tubes and filling heights is given below.



X-Band CW Resonators



1. X-band Super High Sensitivity Probehead (~10 GHz, 4 – 375 K)



• Max. Sample Access 10 mm



2. X-band EMX High Sensitivity Probehead (~10 GHz, 4 – 375 K)



• Max. Sample Access 10 mm



X-band CW/Pulse Resonators



3. X-band Pulse-ENDOR Dielectric Resonator (EN 4118X-MD4, ~9.7 GHz, 2-300K)



• Max. Sample Access 4 mm (use <3.8 mm tubes ONLY)

• Sample centre 55 mm (tube longer that this)

• Resonator length 13 mm (filling height)

• CW or pulse mode

• Optically transparent 200 nm – 5 μm



4. X-band Split-Ring Resonator (EN 4118X-MS3, ~9.6 GHz, 2–323 K)



• Max. sample access 3 mm (use < 2.8 mm tubes)

• Sample centre 39 mm (tube longer that this)

• Resonator length 6 mm (filling height)

• CW or pulse mode (tπ/2 = 16 ns, Pmw=18 dB)



5. X-band Dielectric Resonator (EN 4118X-MD5, ~9.7 GHz, 2–323 K)



• Max. sample access 5 mm (use < 4.8 mm tubes)

• Sample centre 38 mm (tube longer that this)

• Resonator length 13 mm (filling height)

• CW or pulse mode

• Optically transparent 200 nm – 5 μm



W-band Resonator



6. W-band Pulsed ENDOR Resonator (EN600-1021H TeraFlex, ~94 GHz, 4-300 K)



• Max. sample access 0.9 mm

• Resonator filling length c.a. 3 mm

• CW or pulse mode



Sample Preparation Laboratory



1. Vacuum line

• operating at <10-5 mbar

• EPR tubes connectors for tubes with OD of 0.9 mm, 3.0 mm, 3.8 mm or 4 mm (allows you to take your EPR tube from i.e. a glovebox, to the vacuum line without contact to air)

2. Fumehood

3. Liquid nitrogen storage dewar for EPR samples

4. Storage Fridge/freezer

4. Work benches

5. Analytical balance



Lasers



For information regarding Laser facilities within CAESR please contact Dr. Kevin Henbest