In order to achieve good beam quality, the amplitude of 1st harmonic field will be limited to less than 2 Gauss in CYCIAE-100. Many factors will give impact on the magnetic conductance of the magnet, In order to achieve good beam quality, the amplitude of 1st harmonic field will be limited to less than 2 Gauss in CYCIAE-100. Many factors will give impact on the magnetic conductance of the magnet,