23 research outputs found
High Gradient Superconducting Cavity with Low Surface EM Fields and Well-Suppressed HOMS for the ILC
We present an optimized geometry for a 1.3 GHz superconducting cavity in
which the surface electromagnetic fields have been minimized and the bandwidth
of the fundamental mode has been maximized. We refer to this design as the New
Low Surface Field (NLSF) cavity. Earlier work focused on properties of the
fundamental mode. Here we additionally study higher order modes (HOMs), means
of damping them, and short range wake fields. A two-band circuit model is
employed in order to facilitate rapid characterization of cavity HOMs.Comment: Presented at First International Particle Accelerator Conference,
IPAC'10, Kyoto, Japan, from 23 to 28 May 201
SRF cavity geometry optimization for the ILC with minimized surface e.m. fields and superior bandwidth
The main linacs of the ILC consist of nine-cell cavities based on the TESLA
design. In order to facilitate reaching higher gradients we have re-designed
the cavity shape. This leads to a reduction, comparable to several current
designs, in both the ratio of the surface electric field to the accelerating
field (Es/Ea) and the magnetic field to the accelerating field (Bs/Ea). The
bandwidth of the accelerating mode is also optimized. This new shape, which we
refer to as the New Low Surface Field (NLSF) design, bears comparison with the
Ichiro, Re-entrant and LSF designs.Comment: Presented at the 23rd Particle Accelerator Conference (PAC09)
Vancouver, Canad
High-gradient SRF Cavity with Minimized Surface E.M. Fields and Superior Bandwidth for the ILC
Results are presented on an alternative cavity to the ILC baseline design of
TESLA-style SRF main accelerating linacs. This re-optimised shape enhances the
bandwidth of the accelerating mode and has reduced surface electric and
magnetic fields, compared to the baseline design and some current high gradient
designs. Detailed simulations on the e.m. fields for the New Low Surface Field
(NLSF) cavity, including end-cell and coupler designs, are reported. The
re-distributed dipole modes are also discussed.Comment: Proceedings of 14th International Conference on RF Superconductivity
(SRF 2009), 2009, Berlin, German