CAESR

ESR Facility - Department of Chemistry

• microwave frequency 9.1-9.9 GHz (0.32cm-1, wavelength 32.6mm)
• temperature 3-300 K
• field range 0-0.6 T
• resonators 1 and 2, (rectangular resonators)

Arbitrary Waveform Generator pulse formation, 1.6 GHz, 0.625 ns time step

At X-band, 1kW 
• microwave frequency 9.1-9.9 GHz (0.32cm-1, wavelength 32.6mm)
• temperature 2–300 K 
• magnetic field 0-1.55 T
• resonator 1-5 (rectangular cavity, dielectric ring, dielectric ring ENDOR, split-ring) 

At Q-band, 140W 
• microwave frequency 33-35 GHz (1.13cm-1, wavelength 8.8mm)
• temperature 3.8-300 K 
• magnetic field 0-1.55 T 
• resonators

At X-band, 1kW 
• microwave frequency 9.1-9.9GHz (0.32cm-1, wavelength 32.6mm)
• 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, 200mW 
• microwave frequency ~ 94 GHz (3.14cm-1, wavelength 3.2mm)
• temperature 3.8-300 K 
• magnetic field 0-6 T 
• resonator 6

ITC503 temperature status

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 

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