Speaker
Description
A 550 GeV centre-of-mass Higgs factory is presented, the
Linear Ghost Collider (LGC). Acceleration and deceleration
are performed within SRF linacs where the bunches trans-
ported are net neutral, comprising equal charges of electrons
and positrons, termed ghost bunches. Within these, one
charge partner accelerates, and the other decelerates. En-
ergy is recovered after a collision, and all particles recycled.
An accompanying paper - Ghost Collider (GC) - introduces
this concept. LGC comprises an alternative configuration to
GC that eliminates turn-around arcs. This enables a large re-
duction in energy lost to synchrotron radiation, and in bunch
degradation, in comparison to GC. Two variants of LGC
are presented: a pulsed version realisable with proven SRF
technology with instantaneous luminosity $35 \times 10^{34}$ cm$^{−2}$
s$^{−1}$ @ 100 MW electrical power; and a continuous-wave
(CW) version based on expected parameters for thin-film
Nb$_3$Sn-on-copper SRF technology, capable of $348 × 10^{34}$
cm$^{−2}$ s$^{−1}$ @ 160 MW electrical power.
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