The magnetic proton recoil technology is a new diagnostic instrument for fusion neutron spectrometry studies.It has good energy resolution and high signal-to-noise ratio

and is suitable for measurements in mixed fields and large dynamic neutron flux environments.In this paper

we give a review on the magnetic proton recoil spectrometers developed at the world’s large fusion facilities

where good results in different fusion experiments have been obtained.They include the magnetic proton recoil spectrometer(MPR) at Joint European Torus(JET)

using the magnetic analysis system of two-pole electromagnet and achieving an energy resolution of 2.5%;and the magnetic recoil spectrometer(MRS) at OMEGA

University of Rochester

USA

where the magnetic analysis system is capable of analyzing 6–32 MeV protons and an energy resolution of 3.0% has been achieved.A magnetic proton recoil spectrometer developed at China Academy of Engineering Physics using a 0.79 T permanent magnet

with an efficiency of up to 6.2 ? 10–6 cm2 and an energy resolution of 1.6%–2.1%.