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Status of Fast Luminosity Monitoring Using Diamond Sensors For SuperKEKB

Abstract : The SuperKEKB e+e- collider aims to reach a very high luminosity of 8 1035 cm-2s-1, using strongly focused ultra- low emittance bunches colliding every 4ns. A fast luminosity monitoring system is required for luminosity feedback and control in the presence of dynamic imperfections, as well as for luminosity optimisation. A relative precision of about 10−3 in 1ms is specified, which can be achieved thanks to the very large cross-section of the radiative Bhabha process at zero degree scattering angle. The technology used is based on diamond sensors, to be placed just outside the beam pipe, downstream of the interaction point, at locations with event rates consistent with the aimed precision and small enough contamination from single-beam particle losses. We will present estimates of the precisions which can be effectively reached considering several beam-pipe geometries and materials at the selected location, along with a preliminary study of single beam losses expected at the detector location. The status of on-going testing and preparation of the first diamond sensor and fast readout electronics to be used in the single beam commissioning phase will also be reported.
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Submitted on : Tuesday, May 12, 2015 - 4:05:31 PM
Last modification on : Wednesday, September 16, 2020 - 5:45:22 PM


  • HAL Id : in2p3-01151247, version 1




D. El Khechen, P. Bambade, D. Jehanno, V. Kubytskyi, C. Rimbault. Status of Fast Luminosity Monitoring Using Diamond Sensors For SuperKEKB. 6th International Particle Accelerator Conference - IPAC'15, May 2015, Richmond, United States. ⟨in2p3-01151247⟩



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