出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Fusion is preparing for and moving towards reactor scale plasma experiments. The ITER project
requires stepping up the capabilities of neutron measurement systems because in a fusion reactor,
measurements of neutron yield and of fusion power and power density are essential. Fast neutron
measurement systems for fusion applications include neutron ux measurement systems, neutron
imaging systems and neutron spectrometers. The JET tokamak is the most suitable test bed for
the development of these systems due to its plasma parameters and unique tritium operation capability.
Existing systems include 2 neutron cameras composed of multi-collimator arrays and
which allow the development of more advanced applications such as 2-D neutron imaging for the
study of critical physical phenomena. The spectral width of the neutron emission should be a
reliable indicator of ion temperature in a reactor grade plasma. Therefore, three types of neutron
spectrometers are currently being developed. The different approaches, methods and calibration
techniques are summarised. Finally, since the needs for development of robust and proved neutron
measurement systems for ITER are increasingly recognised, JET has now started a series of
interesting technological developments in various elds including new radiation hard detectors,
new electronics and data acquisition.
