Meeting Tight Frequency Requirement of Rounded Damped Detuned Structure

Technical Report · Mon Jan 22 04:00:00 EST 2001

DOI:https://doi.org/10.2172/784840· OSTI ID:784840

Li, Zenghai ^[1]

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1. SLAC

Following successful design and fabrication of damped detuned structures, the R and D for the accelerating structures of the NLC/JLC linear collider project proceeded to studies of Rounded Damped Detuned Structure with curved cross section of the cavity shape for increased shunt impedance. The important features of the structure are the accurately tuned accelerating mode frequency and the distribution of the first dipole modes smooth and close to the design distribution. These requirements were met based on the high-accuracy diamond turning with its capability to realize the periphery tolerance of two microns. The lowest dipole mode frequencies scattered by 0.6 MHz RMS. The error in the accelerating mode frequency averaged over a structure was 0.1 MHz by applying a feed-forward method.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 784840
• Report Number(s): SLAC-PUB-8719
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCURACY
CROSS SECTIONS
DAMPING
DESIGN
DIPOLES
FREQUENCY CONTROL
IMPEDANCE
LINEAR COLLIDERS
MODE CONTROL
TUNING