deletions | additions       diff --git a/HigherEnergyUpgrades.tex b/HigherEnergyUpgrades.tex  index 11ad38f..660d98a 100644  --- a/HigherEnergyUpgrades.tex  +++ b/HigherEnergyUpgrades.tex 
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The possibility of further increasing the centre-of-mass energy of the ILC by another factor of two to $\sqrt{s}=$ 1 TeV has also been considered. The other linear collider project, CLIC~\cite{cite:CLICDR}, could provide a higher-energy physics programme all the way to $\sqrt{s}=$ 3 TeV. It would require, however, considerably more electrical power, estimated at $\sim 600$~MW.   The ultimate energy-frontier option for TLEP is of a very different and more ambitious nature. It would consist of using the 80-to-100 km tunnel to house a very-high-energy large hadron collider, the VHE-LHC. If equipped with magnets of 15~T, pp collisions could be produced at a centre-of-mass energy of 80 to 100 TeV, giving access to the direct production of new particles weighing with masses of  10~TeV or more. For completeness, we also note that pp collisions with a centre-of-mass energy of 33 TeV could be obtained by re-using the LHC tunnel for a pp collider using 20~T magnets, the high-energy hadron collider, HE-LHC. \subsubsection{The Htt coupling}