  The superconducting solenoid magnet prototype for ADS injection-I had been
fabricated in Beijing Qihuan Mechanical and Electric Engineer Company and
tested in Haerbin Institute of Technology (HIT) in Nov, 2012. Batch magnet
production was processed after some major revision from the magnet prototype,
they include: removing off the perm-alloy shield, extending the iron yoke,
using thin superconducting cable, etc. The first one of the batch magnets was
tested in the vertical Dewar in HIT in Sept. 2013. Field measurement was
carried out at the same time by the measurement platform that seated on the top
of the vertical Dewar. This paper will present the field measurement system
design, measurement results and discussion on the residual field from the
persistent current effect.
