Orateur
Chengguo PANG
(0633782655)
Description
The SuperKEKB e + -e − collider aims to reach a very high
luminosity of 8×10 35 cm −2 s −1 , using highly focused ultra-
low emittance bunches colliding every 4ns. To meet the re-
quirement of the dithering feedback system used to stabilise
the horizontal orbit of the IP(Interaction Point), a relative
precision of 10 −3 in 1ms is specified for the fast luminosity
monitoring, which can be in principle achieved thanks to
the large cross section of the radiative Bhabha process. This
paper firstly presents the fraction of detected Bhabha scatter-
ing positrons with a new beam pipe coupled with a Tungsten
radiator installed in LER; Then the characteristics of signals
from sCVD diamond detector with thickness of 140μm cou-
pled with a broadband current amplifier were studied based
on tests with a Sr-90 source; Finally, simulated results for
the reconstructed luminosity and the relative precision with
different initial luminosities are also reported.
Auteur principal
Chengguo PANG
(0633782655)
Co-auteurs
Dr
Cecile Rimbault
(LAL Orsay)
Mlle
Dima El Khechen
(Laboratoire de l'Accélérateur Linéaire LAL)
Dr
Philip Bambade
(LAL)
Dr
Viacheslav Kubytskyi
(LAL)
Yann Peinaud
(CNRS/IN2P3/LAL)
M.
didier JEHANNO
(LAL)
