22-26 July 2019
Ecole Nationale Supérieure de Chimie
Europe/Paris timezone

The IR magnets for EIC

23 Jul 2019, 11:18
Amphi Friedel (Ecole Nationale Supérieure de Chimie)

Amphi Friedel

Ecole Nationale Supérieure de Chimie

11 Rue Pierre et Marie Curie, 75005 Paris
Oral presentation Accelerator R&D Parallel session A


Gianluca Sabbi (LBNL)


The EIC physics goals require high luminosity and a full-acceptance detector. In order to meet these goals, the interaction region design needs to address large asymmetries between the ion and electron beams, and the presence of collision products traveling near the ion beam downstream from the IP. Since it is still not possible to separate all the collision products of interest prior to the ion beam focusing elements, large aperture quadrupoles are required allowing detection and momentum analysis further downstream. The resulting IR layout needs to integrate accelerator and detector elements over a much longer distance from the IP than is typical of other colliders. In addition, two separate beamlines are required to independently adjust the electron and ion energies. Since the crossing angle is limited by the complexity of the associated crab cavity system, the ion beam quadrupoles need to be radially compact and contain or correct the fringe field on the path of the electron beam to minimize the synchrotron radiation background in the detector. Finally, large functions make the beam very sensitive to magnet misalignments and multipole components. This should also be addressed by the quadrupole design to minimize the space allocated to correction elements in a tightly packed IR. This presentation will discuss the current status of the IR magnet technologies and designs under consideration for eRHIC and JLEIC to address the physics requirements while meeting space and background radiation constraints.

Primary author

Gianluca Sabbi (LBNL)

Presentation Materials