Injection scheme with deflecting cavity for a fourth-generation storage ring

Abstract

We suggest a new on-axis injection scheme that uses two deflecting cavities to remove the tilt of the stored beam, and to kick the injected beam into the ring. In this new injection scheme, an injected beam with a certain angle is overlaid on the stored beam's position in transverse phase space through the second deflecting cavity. (Note that the injected beam has separated phase with the stored beam in longitudinal phase space). We present theoretical analysis and numerical simulations of the stored beam and injected beam with the new injection scheme.

Demonstration of a ring-FEL as an EUV lithography tool

“…The PAL-4GSR (Kim et al, 2019) storage ring (Table 1) is a hybrid seven-bend achromat (H7BA) lattice with a horizontal emittance of 90 pm. The ring is 570 m in circumference and is composed of 20 symmetrical cells.…”

“…A free-electron laser (FEL) (Kim, 1986) that uses a storage ring (ring-FEL) (Murphy & Pellegrini, 1985) is a candidate high-brightness radiation source for EUVL. A ring-FEL has the advantage of high average power, but electron bunches in the storage ring have a low peak current and a high energy spread.…”