Multipactor in 4 rod crab cavities:46th European Microwave Conference, EuMC 2016

Burt, G. and Constable, D. and Hall, B. (2017) Multipactor in 4 rod crab cavities:46th European Microwave Conference, EuMC 2016. In: 46th European Microwave Conference (EuMC), 2016, 2016-10-042016-10-06, ExCel Conference Centre.

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Multipactor is a limiting factor in many SRF cavities due to the additional heat load and power absorption. In this paper we study multipactor in 4 rod crab cavities, which have deflecting rather than accelerating fields. The particles are tracked in CST Particle Studio for three different secondary emission yields (SEY) to differentiate between hard and soft multipacting barriers. It is shown that multipacting barriers exist at a transverse voltage of 2 MV for high SEY materials but that these trajectories do not appear with lower SEY materials suggesting that they will process away. © 2016 EuMA.

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Contribution to Conference (Other)
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46th European Microwave Conference (EuMC), 2016
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Conference code: 126027 Export Date: 28 July 2017 References: Palmer, R.B., (1988) Report no SLAC-PUB-4707; Hall, B., (2012) Designing the Four Rod Crab Cavity for the High-Luminosity LHC Upgrade, , PhD Thesis, Lancaster University, Sept; Yla-Oijala, P., (1999) Part. Accel., 63, p. 105;; Burt, G., Dexter, A.C., (2012) Prediction of Multipactor in the Iris Region of Deflecting Mode Cavities, , PRST-AB, Jan
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31 Jul 2017 08:28
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22 Nov 2022 14:22