Photon Collider for energies 1-2 TeV

TL;DR

This paper explores the feasibility of constructing a photon collider with energies of 1-2 TeV based on existing linear collider technology, proposing modifications to laser systems to achieve high-energy photon collisions.

Contribution

It introduces a practical design for a TeV-scale photon collider using modern lasers and minimal modifications to existing systems, extending the energy range previously considered unfeasible.

Findings

High-energy photon spectrum is narrow and well separated from low-energy spectrum.

High-energy gamma-gamma luminosity is about 20% of the electron-positron collider luminosity.

Maximum differential luminosity is approximately 25% of the lower-energy collider's values.

Abstract

We discuss a photon collider based on the $e^+e^-$ \ linear collider with energies of $2E = 1\div 2$ TeV in cms (ILC, CLIC, ...). Previously, this energy range was considered hopeless for the experiment in the foreseeable future. We discuss the realization of the TeV PLC based on modern lasers. A small modification of the laser-optical system prepared for the photon collider with energy of $E \approx 250$ GeV will be sufficient if the parameters are chosen optimally. The high-energy part of the photon spectrum does not depend on design details and is well separated from the low-energy part. That is a narrow band near the upper boundary, about 5\% wide. The high-energy integrated \ggam luminosity is about 1/5 and the maximum differential luminosity is about 1/4 of the corresponding values for the photon collider with $E \approx 250$ GeV.