CAJ | 학술논문

上海光源EPU100是一台APPLE-Ⅱ型可变椭圆极化波荡器,其磁结构由四排磁排列组成,其中两排对角线上的磁排列可沿纵向移动,从而产生不同的磁场分布以满足各种极化模式的要求.随着磁排列在纵向上的相对移动,磁排列间的磁力大小和方向会发生变化,从而引起横梁不仅在垂直方向而且在水平方向产生不同的变形.本文通过对不同相位下不同磁力所引起滑动梁的变形进行分析研究,得到与实测变形一致的等效横梁力学模型.
상해광원EPU100시일태APPLE-Ⅱ형가변타원겁화파탕기,기자결구유사배자배렬조성,기중량배대각선상적자배렬가연종향이동,종이산생불동적자장분포이만족각충겁화모식적요구.수착자배렬재종향상적상대이동,자배렬간적자력대소화방향회발생변화,종이인기횡량불부재수직방향이차재수평방향산생불동적변형.본문통과대불동상위하불동자력소인기활동량적변형진행분석연구,득도여실측변형일치적등효횡량역학모형.
EPU100 at SSRF is an APPLE-Ⅱ type variable elliptically polarized undulator.The magnet structure consists of four magnet arrays with standard Halbach-type.Two arrays at one diagonal can move longitudinally on the rafts so that different magnetic field distributions are shaped to meet the requirements of varieties of polarization modes.With the longitudinal moving of the magnet arrays,the magnitude and the direction of the magnetic forces changed and the distortions of the backing beams both in vertical and horizontal directions will be different.In this paper we analyze and calculate the horizontal displacement of the beams in different gaps and phase shifts to create an equivalent beam mechanical model which is consistent with the measured deformations.