The invention discloses a through hole cold wall vector
magnet structure and a strong
magnetic field terahertz near field measurement
system, the through hole cold wall vector
magnet structure comprises a vector
magnet, the vector magnet is provided with a magnet through hole penetrating through the top and the bottom of the vector magnet, the vector magnet comprises multiple
layers of shells which are sequentially spaced from outside to inside and coaxially sleeved, and the multiple
layers of shells are all coaxial with the axis of the magnet through hole; an outer vacuum interlayer, a
liquid nitrogen interlayer, a first vacuum interlayer and a second vacuum interlayer are sequentially formed among the multiple
layers of shells. According to the invention, the through hole is formed in the vector magnet, enough space is provided for the internal unit of the sample cavity, the outer vacuum interlayer, the
liquid nitrogen interlayer, the first vacuum interlayer, the second vacuum interlayer and the
liquid helium cavity are arranged, and a multi-layer
cold shield is formed by vacuumizing and
liquid nitrogen injection, so that a cold wall is formed on the inner wall of the through hole of the magnet; therefore, a low-temperature basis is provided for an
optical coupling scanning probe test
system under multi-field regulation and control.