The efficiency of a free-electron laser can be enhanced by the phase jump method. The method utilizes the phase-shifting chicanes in the drift sections between the undulator segments. By applying appropriate phase jumps. the microbunched electron beam can decelerate and radiate coherently beyond the initial saturation. https://safeersappliancers.shop/product-category/aeg-fss53907z-fully-integrated-standard-dishwasher-black/