At the beginning of the dissolution sequence, the ZULF spectrometer received a trigger from the d DNP system, which immediately switched on the guiding solenoid and the Helmholtz-coil pair, both providing a 100 µT field. After the transfer, the hyperpolarized sample reached the NMR tube waiting in the detection region which has a PEEK assembly containing input and output capillaries for injection and exhaust. 4 s after receiving the trigger, the guiding solenoid was switched off. After an additional delay of 100 ms allowing the solenoid field to decay, the Helmholtz coil was switched off within 10 µs, bringing the spins non-adiabatically to zero field to generate an observable signal. As mentioned above, a flow of He gas pushed the solution from the polarizer during t trans = 2 s. The detection was performed 4.1 s after the ZULF spectrometer received the trigger from the d DNP system, meaning that the solution was left at 100 µT during a settling time t settle = 2.1 s. This delay allowed the pressure of the He propeller gas to equilibrate with at-mospheric pressure for the sample to settle.