Status of RF deflecting cavity design for the generation of short x-ray pulses in the Advanced Photon Source storage ring.

Conference · Sun Jan 01 04:00:00 EST 2006

OSTI ID:974013

Waldschmidt, G; Borland, M; Chae, Y C; Harkay, K; Horan, D; Nassiri, A

The Advanced Photon Source (APS) at Argonne National Laboratory is exploring the possibility of using radio frequency deflection to generate x-ray radiation pulses on the order of 1 pico-second (Delta t - 70%) or less. This scheme is based on a proposal by A. Zholents et al. that relies on manipulating the transverse momentum of the electrons in a bunch by using an rf deflecting cavity to induce a longitudinally dependent vertical deflection of the beam. The beam will then travel through a number of undulators before arriving at a second set of deflecting cavities where the deflection is reversed such that the remainder of the storage ring is largely unperturbed. Considerable effort has been expended on the design of a superconducting rf deflecting cavity operating in the S-band at 2.8 GHz to address fundamental design issues including cavity geometry, deflecting voltage, rf power coupling, tuning, and damping of higher-order and lower-order modes. In this paper we present simulation results and analysis of an optimized superconducting rf deflecting cavity design for the APS storage ring.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 974013
• Report Number(s): ANL/ASD/CP-118960
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ADVANCED PHOTON SOURCE
ANL
CAVITIES
DAMPING
DESIGN
ELECTRONS
GEOMETRY
RADIATIONS
SIMULATION
STORAGE RINGS
TRANSVERSE MOMENTUM
TUNING
WIGGLER MAGNETS