Speaker
Description
(Presented by Andrew Hutton for Peter Williams, Robert Apsimon, William Clampitt, Todd Satogata and Balša Terzić)
Present and future high-energy electron-positron colliders are limited by two effects: the energy required to accelerate the beams and the electromagnetic beam-beam disruption. The Ghost Collider is an innovative concept that circumvents both problems, based on Energy Recovery Linac (ERL) technology.
The first key innovation is the placement of electron and positron bunches within the same RF bucket – one being accelerated, the other decelerated. The buckets are therefore electrically neutral, beam position monitors will register no current (hence “ghost”) and crucially when the beams are decelerated, the energy is recovered, a vital part of making the collider more sustainable.
The second key innovation is at the interaction point (IP); an electron bunch and a positron bunch collide with an electron bunch and a positron bunch from the opposite direction. These collisions are electrically neutral so there is no beam-beam disruption at the IP to first order, eliminating the primary limit on luminosity in all other collider concepts. time as accelerated positrons from one bucket behind.
Recent advances will be presented.
