Also according to the recent Directive by the European Parliament and the Council of the European Union, there is a need for a simple but reliable device to measure exposure to the magnetic field ...(MF) of magnetic resonance (MR) workers, especially given the continuing development of scanner using a higher static MF. Here the authors describe a novel device for assessing personal exposure to the MF. The time recording system can measure the static MF value at which the operator is exposed to and the field gradients due to his/her movements in the MR environment. The device does not require any cable for data management and transmission and it is able to record the instantaneous and cumulative exposition dose. The device can be used in all MR environments, for clinical or industrial applications.
The CYlindrical neutron SPectrometer (CYSP) is a polyethylene cylinder with diameter 50 cm and height 65 cm equipped with a collimated aperture and an internal capsule embedding multiple thermal ...neutron detectors. Analogously to Bonner Spheres, CYSP responds from thermal up to GeV neutrons and the spectrum is obtained via few-channel unfolding methods. Due to the specific design and the use of borated materials, the internal detectors only respond to neutrons coming from the desired direction. By changing the type and sensitivity of the internal detectors, the CYSP was adapted to respond over a variety of fluence rates. This work describes HELIOCYSP, an updated design of CYSP, including Helium-3 proportional counters as internal detectors and a more convenient design of the internal capsule. Due to the increased sensitivity, HELIOCYSP is suited for time-effective measurements in very low fluence rate scenarios, as those encountered in cosmic-ray-induced neutron studies at ground level.
