Conceptual design of an L-band recirculating superconducting traveling wave accelerating structure for ILC

Conference · Fri Jun 01 04:00:00 EDT 2007 · Conf.Proc.C070625:2538,2007

DOI:https://doi.org/10.1109/PAC.2007.4441309· OSTI ID:922026

Avrakhov, P; Kanareykin, A; Liu, Z; Kazakov, S; Solyak, N; Yakovlev, V; Gai, W

With this paper, we propose the conceptual design of a traveling wave accelerating structure for a superconducting accelerator. The overall goal is to study a traveling wave (TW) superconducting (SC) accelerating structure for ILC that allows an increased accelerating gradient and, therefore reduction of the length of the collider. The conceptual studies were performed in order to optimize the acceleration structure design by minimizing the surface fields inside the cavity of the structure, to make the design compatible with existing technology, and to determine the maximum achievable gain in the accelerating gradient. The proposed solution considers RF feedback system redirecting the accelerating wave that passed through the superconducting traveling wave acceleration (STWA) section back to the input of the accelerating structure. The STWA structure has more cells per unit length than a TESLA structure but provides an accelerating gradient higher than a TESLA structure, consequently reducing the cost. In this paper, the STWA cell shape optimization, coupler cell design and feedback waveguide solution are considered. We also discuss the field flatness in the superconducting TW structure, the HOM modes and multipactor performance have been studied as well. The proposed TW structure design gives an overall 46% gain over the SW ILC structure if the 10 m long TW structure is employed.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 922026
• Report Number(s): FERMILAB-CONF-07-254-TD
• Conference Information: Journal Name: Conf.Proc.C070625:2538,2007
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATION
ACCELERATORS
Accelerators
DESIGN
FEEDBACK
OPTIMIZATION
PERFORMANCE
SHAPE
WAVEGUIDES