Features

• Variable temperature EPR (X and Q-band) measurement(5K-300K)
• Single crystal measurement
• Finger dewarn A
• Working Principles
• An EPR experiment the field of the spectrometer magnet is swept linearly to excite some of the electrons in the lower energy level to the upper energy level while the sample is exposed to fixed microwave irradiation. The free or the upaired electrons have a small magnetic field and orient themselves parallel to the larger field produced by the spectrometer's magnet. At a particular magnetic field strength the microwave irradiation will cause some of the free electrons to "flip" and orient against the spectrometer's magnetic field. This separation between the lower and the higher energy level is exactly matched by our microwave frequency. The condition where the magnetic field and the microwave frequency are "just right" to produce an EPR resonance (or absorption) is known as the resonance condition is detected by the spectrometer.
• Digital Ultra High Resolution Hall Field Controller
  Microwave Bridge: Type EMX-m40X(X-band)
  Source: solid state microwave source;
  Frequency range: 9,3 to 9,9 GHz
  low noise: -130dBc/ 100 kHz from carrier
  maximum source output : 200mW
  phase sensitive detection
  integrated frequency counter with 1 kHz resolution
  
  Frequency Tuning:
  tune bandwidth: 8 MHz,
  suitable for standard resonator types
  Automatic Frequency Control(AFC):
  AFC lock range: 4 MHz
  digital adjustment for modulation amplitude and gain
  AFC stability: 10-8
  
  Microwave Power Setting:
  Attenuation : 60dB max
  automatic phase correction over attenuation range,
  
  Microwave Reference Arm:
  Reference Arm with microwave attenuation and phase shifter,
  
  Signal Amplifier: low noise preamplifier,
  20 Hz to 600 kHz,
  two 50 Ohm signal outputs
  
  Resonator Tuning and Matching:
  the system features "auto tuning" and "auto matching"
  for most probeheads via iris
  
  Q-factor Display:
  the system evaluates the probehead (resonator) and
  displays the loaded Q-Factor.
  All parameters of the bridge are software controlled
  
  High Sensitivity Probe (Type 2)
  with optical window for CW-EPR in X-Band:
• 10 mm sample access
• 20 G maximum modulation amplitude
• automatic cavity matching
• forlossy and non-lossy samples
• compatible with ER 4131VT and ER 4112HV
• unloaded Q > 15.000
• Sensitivity: Weak Pitch 1200 : 1 Absolute 2.5 x 109 spins / G
• 
  Q-Band Microwave Bridge with frequency counter
  microwave source: Gunn
  Operating frequency: 34 GHz
  max. Power: 100 mW
  operating range: 100 MHz
  attenautaion precision: +/- 0.2dB
  attenuation resolution: 1 dB
  attenuation max.: 60 dB
  Signal bandwidth: 30 Hz to 400 kHz
  Integrated frequency counter with 1 kHz resolution
  
  ER 5106QT
  Cavity for room-, nitrogen, helium temperatures (X-band)
  
  Helium Cryostat, 3.8 K to 300 K (Q-band)
  with 5 mm optical window,compatible with ER 4112HV-1020 control system(including cryostat holder), used for Flexline,K- and Q-Band resonators.
  
  ER 5106QT
  Electrolytic cell assembly (X-band)
  Single crystal EPR measurement One axis Goniometer