A magnetic resonance examination system comprising: - a main magnet with superconducting coils configured to generate a main magnetic field; - a gradient system configured to apply a gradient magnetic field superposed on the main magnetic field; - a cooling system comprising a cooling medium and configured to cool the superconducting coils to below their critical superconductivity temperature; said magnetic resonance examination system characterized in that it further comprises: - a transfer monitor configured to assess transfer of energy from the gradient system to the cooling system, whereby the transfer monitor is configured to - control the gradient system to generate a test gradient magnetic field, the test gradient field being a waveform with active time intervals in which a gradient magnetic field is switched on, the active time intervals being separated by time intervals during which the gradient magnetic fields are switched off, and the test gradient magnetic field having a gradually increasing excitation frequency during successive active time intervals; - measure pressure in the cooling system in active time intervals and time intervals during with the gradient magnetic field are switched off; - compute differences between the measured pressure in the cooling system in active time intervals and the measured pressure in the cooling system in time intervals during with the gradient magnetic field are switched off; and - compute a transfer characteristic from the measured pressure differences and the waveform of the test gradient magnetic field, wherein the transfer characteristic represents the energy transfer from the gradient system to the cooling system as a function of excitation frequency, and the energy transfer is derived from the boil-off of the cooling medium, such that the measured pressure differences are representative of the transfer of energy from the gradient system to the cooling system. - a main magnet with superconducting coils configured to generate a main magnetic field; - a gradient system configured to apply a gradient magnetic field superposed on the main magnetic field; - a cooling system comprising a cooling medium and configured to cool the superconducting coils to below their critical superconductivity temperature; - a transfer monitor configured to assess transfer of energy from the gradient system to the cooling system, whereby the transfer monitor is configured to - control the gradient system to generate a test gradient magnetic field, the test gradient field being a waveform with active time intervals in which a gradient magnetic field is switched on, the active time intervals being separated by time intervals during which the gradient magnetic fields are switched off, and the test gradient magnetic field having a gradually increasing excitation frequency during successive active time intervals; - measure pressure in the cooling system in active time intervals and time intervals during with the gradient magnetic field are switched off; - compute differences between the measured pressure in the cooling system in active time intervals and the measured pressure in the cooling system in time intervals during with the gradient magnetic field are switched off; and - compute a transfer characteristic from the measured pressure differences and the waveform of the test gradient magnetic field, wherein the transfer characteristic represents the energy transfer from the gradient system to the cooling system as a function of excitation frequency, and the energy transfer is derived from the boil-off of the cooling medium, such that the measured pressure differences are representative of the transfer of energy from the gradient system to the cooling system. - control the gradient system to generate a test gradient magnetic field, the test gradient field being a waveform with active time intervals in which a gradient magnetic field is switched on, the active time intervals being separated by time intervals during which the gradient magnetic fields are switched off, and the test gradient magnetic field having a gradually increasing excitation frequency during successive active time intervals; - measure pressure in the cooling system in active time intervals and time intervals during with the gradient magnetic field are switched off; - compute differences between the measured pressure in the cooling system in active time intervals and the measured pressure in the cooling system in time intervals during with the gradient magnetic field are switched off; and - compute a transfer characteristic from the measured pressure differences and the waveform of the test gradient magnetic field, wherein the transfer characteristic represents the energy transfer from the gradient system to the cooling system as a function of excitation frequency, and the energy transfer is derived from the boil-off of the cooling medium, such that the measured pressure differences are representative of the transfer of energy from the gradient system to the cooling system.