RF cavity R&amp;D at LBNL for the NLC damping rings, FY1999

Rimmer, Robert; Corlett, J.; Koehler, G.; Li, D.; Hartman, N.; Rasson, Jean‐Paul; Saleh, Tanveer

doi:10.2172/877315

Cited by 7 publications

(13 citation statements)

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“…We have therefore designed the lattice to accommodate five cavities. Each cavity requires approximately 1 meter of free space [22]. To avoid transients arising from variations in beam loading during injection/extraction, the cavities must be placed downstream of the injection kicker and upstream of the extraction kicker (in the present design they are positioned just before 66 CHAPTER 3.…”

Section: Technical Componentsmentioning

confidence: 99%

“…Adjacent cavities are separated by 3.75 wavelengths allowing pairs of cavities to be fed from a single klystron via a "magic T". It is assumed at present that the cavities are the same design as used in the main damping rings [21,22], being HOM-damped structures based on the PEP-II design. Studies of instabilities driven by modes in the cavities have yet to be carried out for the pre-damping ring, though we note that in the case of the main damping rings, only a few modes transverse and longitudinally are above the damping threshold [23], and growth rates for these modes can readily be dealt with by feedback systems.…”

Section: Rf Cellmentioning

confidence: 99%

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U.S. Linear Collider Technology Options Study

Bagger¹

2006

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Section: Technical Componentsmentioning

confidence: 99%

Section: Rf Cellmentioning

confidence: 99%

U.S. Linear Collider Technology Options Study

Bagger¹

2006

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“…The solid model may be "cut" in order to create a symmetry section before or after importing into ANSYS, though it is usually faster to perform the cut in the solid modeler, as it reduces the size of the transfer file. Figure 1 shows the original solid model and the portion of the model that is imported into ANSYS for the Next Linear Collider (NLC) damping ring RF cavity design [3,4].…”

Section: Importing Geometrymentioning

confidence: 99%

Electromagnetic, thermal, and structural analysis of RF cavities using ANSYS

Hartman

Rimmer²

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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We report on techniques developed for producing electromagnetic, thermal, and structural solutions to RF cavity design problems in ANSYS, using one model [1]. Methods for preparing imported geometry from solid modeling programs are discussed, and meshing techniques are suggested. A study of mesh density is presented, comparing mesh size with heat flux and Q factor convergence. The general analysis protocol is presented in a stepwise fashion, describing the macros that are used for conducting RF calculations. Finally, these techniques are applied to a proposed RF cavity for the NLC damping rings, which is shown as an example.

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“…Simplifications of the mechanical design and fabrication have also been developed. [1,2] The availability of better analysis tools also now allows more detailed study of some aspects of the design.…”

Section: Introductionmentioning

confidence: 99%

An RF cavity for the NLC damping rings

Rimmer

Atkinson²,

Corlett³

et al.

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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We report on the design and development of a strongly HOM damped copper RF cavity for the NLC damping rings. The cavity is based on the successful PEP-II RF cavity but incorporates many simplifications and improvements. The cavity is designed for a frequency of 714 MHz, gap voltage of 500 kV and beam current of 800 mA. We present the RF design and HOM impedance calculations done in MAFIA, the RF, thermal and stress analyses performed in ANSYS and the simplified mechanical design and assembly process. Designs for the RF window, HOM loads and tuners are described. Options for increasing the stored energy or further lowering the HOM impedance are discussed. This design could easily be scaled up or down in frequency and could be useful for other projects such as new light sources.

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RF cavity R&D at LBNL for the NLC damping rings, FY1999

Cited by 7 publications

References 0 publications

U.S. Linear Collider Technology Options Study

U.S. Linear Collider Technology Options Study

Electromagnetic, thermal, and structural analysis of RF cavities using ANSYS

An RF cavity for the NLC damping rings

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