ESR/NMR Basic Set (115 V, 50/60 Hz)
Experimental topics:
• Resonance absorption of a high-frequency oscillating circuit
• Dependence of resonance frequency on magnetic fields
• Line width
• Electron spin
• Magnetic moment of an electron
• Determination of the electron g factor
• Proton spin
• Magnetic moment of a proton and nucleus
• Determination of the nucleus g factor
• Nuclear-spin tomography

This basic equipment set is intended for investigating the electron spin resonance (ESR) of an unpaired electron of a DPPH sample as well as the nuclear magnetic resonance (NMR) of glycerine, teflon and polystyrene. Resonances are observed via transitions induced through high frequencies resulting from changes in the external magnetic field. Resonance absorption curves can be represented with a simple dual-channel oscilloscope or with the 3B NETlog™ unit.


Contents:
1 Basic unit
1 Pair of coils
1 Control panel
1 Plug-in power supply, 12 V AC (230 V, 50/60 Hz)
or
1 Plug-in power supply, 12 V AC (115 V, 50/60 Hz)

The basic unit is a mechanical base for test samples as well as ESR (from U188501) or NMR probes (from U189021), a coil pair and a permanent magnet (from U189021).
Dimensions: 165x105x135 mm3 approx.
Weight: 1.25 kg approx.

The coil pair is used to generate the variable magnetic field for electron spin resonance and – in conjunction with the permanent magnet (from U189021) – nuclear spin resonance.
Magnetic flux density: 0 − 3.7 mT
Connection: Barrel connector
Dimensions: 20 mm x 74 mm dia. approx. each
Weight: 0.2 kg approx. each

The control console provides the voltage for control and supply of power to probes and the coil pair. It also processes the signal for display on an oscilloscope and indicates the frequency of the high-frequency signal.

Probe connection: Four-pin lemo socket
Coil pair connection: Saw-tooth current source, 0 − 250 mA, 50 ms, pair of barrel sockets
Field output: Proportional to coil current, 0 to 1 V, BNC socket
Signal output: Resonance signal, 0 to 1 V, BNC socket
Frequency range: 45 to 75 MHz approx. (ESR)
10 to 15 MHz approx. (NMR)
Dimensions: 170x105x45 mm³ approx.
Weight: 0.5 kg approx.