deletions | additions       diff --git a/Luminosity measurement.tex b/Luminosity measurement.tex  index bb39c49..05aa6ca 100644  --- a/Luminosity measurement.tex  +++ b/Luminosity measurement.tex 
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\begin{itemize}  \item The smaller value of $\beta^*_y$ increases the beam divergence at the interaction point to the extent that it may have a sizeable effect on the acceptance of low angle detectors used for the luminosity measurement. The better stability of the TLEP beams will help to keep the uncertainty on the beam divergence to a level similar to that evaluated at LEP.   \item The strong final-focus quadrupoles will generate large amounts of synchrotron radiation, which need to be simulated and against which appropriate shielding must be provided.   \item An increased amount of beamstrahlung may lead to a somewhat larger background of electromagnetic radiation produced in the interaction region. As mentioned earlier, in Section~\ref{sec:beamstrahlung},  it is however several orders of magnitude smaller than the level expected in a linear collider environment. \item The repetition rate in multi-bunch operations will reach 20 MHz at the Z pole. This specificity has to be taken into account in the design of the detectors.   \end{itemize}