Speaker
Description
The Ghost Collider is a proposal for a 550 GeV center-of-mass (275 GeV per beam) linear collider with four interaction regions, each with the design luminosity. The primary innovation is the use of “ghost bunches” containing equal numbers of electrons and positrons, therefore being electrically neutral. In the linacs, energy is transferred between electrons and positrons in the same bunch, decelerating one type of particle and using the energy to accelerate the other; a new class of Energy Recovery Linac. At the interaction points (IPs), collisions between two neutral ghost bunches occur. Historically this approach has been referred to as "charge compensation of beam-beam". To avoid instabilities, round beams with small disruption parameter are arranged at the IPs, ensuring particles and their energy can be recycled with minimal loss. Four “serial IPs” are incorporated, where chromatic errors produced in one IP are canceled in the following IP. All interaction points have the nominal luminosity per IP of $2.8 \times 10^{34}$ cm$^{-2}$ s$^{-1}$ for a facility luminosity of $11 \times 10^{34}$ cm$^{-2}$ s$^{-1}$ @ 100 MW total electrical power for SR replacement, linac RF, cryogenic and damping ring systems. The result is a totally original concept for an electron-positron collider.
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