The dipole wakefield for a rounded damped detuned linear accelerator with optimized cell-to-manifold coupling

Conference · Tue Sep 01 04:00:00 EDT 1998

OSTI ID:666106

Jones, R M; Miller, R H; Li, Z; Ruth, R D; Srinivas, V; Wang, J W ^[1]; Kroll, N M ^[1]; Higo, T ^[2]

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1. Stanford Univ., CA (US). Stanford Linear Accelerator Center
2. National Lab. for High Energy Physics, Tsukuba, Ibaraki (Japan)

A redesign of the basic cell configuration of the Damped Detuned Structure has been briefly reported where the cells are referred to as ellipsoidal cavities, and accelerator structures incorporating them are designated DDS5 and DDS6. This new structure type has been renamed RDDS 1, and the first of this series, RDDS 1, is presently under design and fabrication. The carefully sculpted cell profile (fabricated on computer controlled lathes at KEK incorporating diamond point machining) provides a 20% increase in shunt impedance which, when combined with other parameters, allows for a dramatic reduction in the RF power required for the NLC (Next Linear Collider). The detuning profile, damping manifold taper, and the cell to manifold coupling constant profile have all been carefully optimized so as to permit decoupling the cells at the ends of the structure from the manifolds while still adequately minimizing the transverse wake. The decoupling is required in order to fit adequately matched terminations into the structure. The single structure analysis has been supplemented with studies of wake degradation arising from systematic fabrication errors and wake improvement obtained by combining manifold damping with structure interleaving.

• Research Organization: Stanford Univ., Stanford Linear Accelerator Center, CA (US); Univ. of California, San Diego, La Jolla, CA (US)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (US)
• DOE Contract Number: AC03-76SF00515; FG03-93ER40759
• OSTI ID: 666106
• Report Number(s): SLAC-PUB--7934; CONF-980827--; ON: DE98059276
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
BYPASSES
CAVITIES
COMPUTERS
CONFIGURATION
COUPLING CONSTANTS
DAMPING
DECOUPLING
DIPOLES
FABRICATION
IMPEDANCE
LATHES
LINEAR ACCELERATORS
MACHINING