Effect of wavelength shifter on Indus-1

The Indus-1 is a 450 MeV synchrotron radiation source for the production of VUV radiation (λc=61 Å). In order to produce the radiation of shorter wavelength (λc=31 Å), a superconducting wavelength shifter (WLS) with a peak field of 3 T is being considered for Indus-1. In the Indus-1 beam lifetime is short; therefore, WLS will be kept on during beam injection. To predict WLS effect, Smithʹs Hamiltonian for Halbachʹs magnetic field model has been re-derived to estimate linear and nonlinear component under the compensated electron beam trajectory transformation. To minimize the linear effects of WLS, various linear compensation schemes and its effects on Indus-1 operation are presented.