Various superconducting detector solenoids for particle
physics have been developed in the world. The key technology is the
aluminum-stabilized superconductor for almost all the detector
magnets in particle physics experiments. The coil fabrication
technology is also important and it has advanced along with the
conductor technology, such as the inner coil winding technique,
indirect cooling, transparent vacuum vessel, quench protection
scheme using pure aluminum strips and so on. The detector solenoids
design study is in progress for future big projects in Japan and
Europe, that is, ILC (International Linear Collider), FCC (Future
Circular Collider) and CLIC (Compact LInear Collider), based on the
technologies established over many years. The combination of good
mechanical properties and keeping a high RRR is a key point for the
development of Al-stabilized conductor. The present concern for the
detector solenoid development is to have been nearly losing the key
technologies and experiences. Nowadays, there are no industrial
companies having the capacity to manufacture such aluminum
stabilized superconductor. Complementary efforts are seriously
required to re-realize and validate the performance required in the
future projects in collaboration with worldwide institutes and
industries. Some mid-scale physics experiments required detector
solenoids wound with not aluminum stabilized conductor but
conventional copper stabilized conductor. The specific requirement
is to control the magnetic field distribution precisely, and the
efforts to realize the requirement are on going with regard to the
magnetic field design technology with high precision simulation,
coil fabrication technology and so on.