An electron-proton collider in the TeV range

In ep colliding beam measurements, approximate equality of electron and quark energies is desirable for good detection efficiency. In the TeV CM energy regime, synchrotron radiation makes this requirement very expensive to meet using a storage ring for the electrons. A scheme is outlined that ameliorates this problem by using a superconducting linac for electron acceleration. Parameter lists show that such an approach may be practical for next-generation ep colliders beyond HERA (Hadron Electron Ring Accelerator). An example of a 300-GeV electron beam colliding with the HERA p ring is shown. Examples up to square root s=12 TeV are given.<>