Speaker
Description
The Ghost Collider (GC) is an innovative proposal for a 550 GeV centre-of-mass (275 GeV per beam) linear collider with four interaction regions arranged in series, each with the design luminosity. The primary innovation is the use of “ghost bunches” containing equal numbers of electrons and positrons, thereby net electrically neutral. In the linacs, energy is transferred between electrons and positrons within the same bunch, decelerating one type of particle and using its energy to accelerate the other: GC thus comprises a new class of Energy Recovery Linac. At the interaction points, collisions occur between two neutral ghost bunches thereby mitigating beam-beam disruption, ensuring all particles and their energy can be recycled with minimal loss.
GC however requires large turn-around arcs at either end, therefore we also introduce an alternative topology, a fully Linear Ghost Collider (LGC). This enables a large reduction in power lost to synchrotron radiation, and in bunch degradation, in comparison to GC. Two variants of LGC are presented: a pulsed version realisable with proven superconducting radio-frequency (SRF) technology with instantaneous luminosity 35 × 10^34 cm−2 s−1 @ 100 MW electrical power; and a continuous-wave (CW) version based on expected parameters for thin-film Nb3Sn-on-copper SRF technology, capable of 348 × 10^34 cm−2 s−1 @ 160 MW electrical power.
These are, respectively, one and two orders of magnitude higher luminosity than the established Linear Collider Facility @ CERN proposal (LCF), with significantly reduced power consumption. We therefore discuss LGC as a luminosity upgrade of LCF, and compare to alternative proposed Higgs Factories.
| Presenting Author | Peter Williams |
|---|---|
| Is the Presenting Author a PhD Student or Early Career Scientist ? | No |
| Area of research | Lepton accelerators (electron / muon / neutrino) |