Create a technical diagram of a Bruker 800 MHz NMR spectrometer: superconducting magnet with persistent mode switch, liquid helium dewar (4.2K) surrounded by liquid nitrogen dewar (77K), room-temperature bore with Z1/Z2 shim coils, cryogenically cooled triple-resonance (¹H/¹³C/¹⁵N) TCI probe with preamplifiers, gradient coil (Z-gradient 50 G/cm), sample spinner and air bearing, pneumatic sample changer, and console (transmitter, receiver, ADC, pulse programmer). Label B₀ field direction.
