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Collimation system baseline design for the electron storage ring at the Electron-Ion Collider

Andrii Natochii*, Elke-Caroline Aschenauer, Karim Hamdi, Charles Hetzel, Eric Link, Daniel Marx, Christoph Montag, and Steven Tepikian

Yunhai Cai and Yuri Nosochkov

  • *Contact author: natochii@bnl.gov
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Phys. Rev. Accel. Beams 29, 074202 – Published 29 July, 2026

DOI: https://doi.org/10.1103/2v68-np87

Abstract

We present the baseline design of the electron ring collimation system for the Electron-Ion Collider (EIC) at Brookhaven National Laboratory (BNL). The system addresses beam losses in a high-current electron storage ring with superconducting (SC) final-focus magnets and sensitive detectors, where uncontrolled losses can generate heat loads, radiation, and detector backgrounds and damage. The proposed collimation insertion localizes halo particle losses through reducing interaction region beam losses from beam-gas and Touschek scattering by several orders of magnitude while keeping detector backgrounds and cryostat heat loads within acceptable limits. Multiturn particle-tracking simulations show that the collimators do not significantly impact machine acceptance or beam lifetime, and their positions and apertures can be reoptimized for future lattice configurations. Ongoing work includes incorporating crab cavities and solenoid fields into simulations, refining vacuum conditions, and optimizing collimator geometry and materials. This design establishes a robust baseline for the EIC electron ring collimation system and supports continued lattice optimization for machine operations.

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Phys. Rev. Accel. Beams 29, 074202– Published 29 July, 2026
  • Received 24 December 2025
  • Accepted 3 June 2026
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