The Light Dark Matter eXperiment (LDMX) is a planned electron-beam fixed-target missing-momentum experiment that has unique potential to conclusively test models of such light Dark Matter in the MeV to GeV range. The experiment requires a primary 4-15 GeV electron beam capable of delivering 1e14 – 1e16 electrons on target with a low current.
The CERN SPS which once accelerated electrons up to 22 GeV for injection into LEP, together with the R\&D invested into a possible future CLIC, offer CERN an opportunity to create an optimal primary electron beam facility for LDMX. In addition such a facility could serve a beam dump experiment searching dark sector mediators decaying to Standard Model particles, Nuclear Physics, and R\&D on acceleration technology.
The conceptual design report is here
Lyn Evans, Steinar Stapnes
- Orsay (T. Akesson): https://indico.lal.in2p3.fr/event/4884/
- Muon workshop Padua (D. Schulte): DS_muon_WS.pptx
- ICHEP 2018 (S. Stapnes): eSPS-stapnes.pptx