High gradient twin $e^+e^-$, $e^-e^-$ linear colliders with energy recovery
Abstract
Recently, a high energy superconducting (SC) \epem linear collider (LC) with energy recovery (ERLC) have been proposed where twin RF structures are used to avoid parasitic collisions within linacs. Such a collider can operate in a duty cycle (DC) or in a continuous (CW) modes (if sufficient power) with a luminosity of ${\cal O}(10^{36})$ \cms at $2E_0=250-500$ GeV. In this paper, I note that the luminosity at the ERLC operating in duty cycle mode does not depend on the accelerating gradient (at the same total power), but only slightly changes as $L \propto \sqrt{Q}$. So, the ERLC can work at maximum available acceleration gradients. The article also considers $e^-e^-$ twin collider with energy recovery and estimates the achievable luminosity. Such an $e^-e^-$ collider is much simpler than $e^+e^-$ one, because beam recirculation is not required, can have $L$ well above $10^{36}$ cm$^{-2}$s$^{-1}$. It also has a fairly rich physics program.
- Publication:
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arXiv e-prints
- Pub Date:
- February 2023
- DOI:
- 10.48550/arXiv.2302.09758
- arXiv:
- arXiv:2302.09758
- Bibcode:
- 2023arXiv230209758T
- Keywords:
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- Physics - Accelerator Physics;
- High Energy Physics - Experiment;
- High Energy Physics - Phenomenology
- E-Print:
- 6 pages, 2 figures