BNL, Upton, New York, USA
FRIB, East Lansing, Michigan, USA
ORNL RAD, Oak Ridge, Tennessee, USA
LBNL, Berkeley, California, USA
JLab, Newport News, Virginia, USA
The Electron Ion Collider (EIC) presently under construction at Brookhaven National Laboratory will collide polarized high energy electron beams with hadron beams with luminosity up to 1034 cm-2 s-1 in the center mass energy range of 20 to 140 GeV. Due to the detector solenoid in the interaction region, the design horizontal crabbing angle will be coupled to the vertical plane if uncompensated. In this article, we estimate the tolerance of crab dispersion at the interaction point in the EIC Hadron Storage Ring (HSR). Both strong-strong and weak-strong simulations are used. We found that there is a tight tolerance of vertical crabbing angle at the interaction point in the HSR.
JLab, Newport News, Virginia, USA
LBNL, Berkeley, California, USA
BNL, Upton, New York, USA
ORNL RAD, Oak Ridge, Tennessee, USA
CERN, Meyrin, Switzerland
CEA-DRF-IRFU, France
Fermilab, Batavia, Illinois, USA
Efficient realization of the scientific potential of the Electron Ion Collider (EIC) calls for addition of a future second Interaction Region (2nd IR) and a detector in the RHIC IR8 region after the EIC project completion. The second IR and detector are needed to independently cross-check the results of the first detector, and to provide measurements with complementary acceptance. The available space in the existing RHIC IR8 and maximum fields achievable with NbTi superconducting magnet technology impose constraints on the 2nd IR performance. Since commissioning of the 2nd IR is envisioned in a few years after the first IR, such a long time frame allows for more R&D on the Nb3Sn magnet technology. Thus, it could provide a potential alternative technology choice for the 2nd IR magnets. Presently, we are exploring its potential benefits for the 2nd IR performance, such as improvement of the luminosity and acceptance, and are also assessing the technical risks associated with use of Nb3Sn magnets. In this paper, we present the current progress of this work.
ODU, Norfolk, Virginia, USA
ORNL RAD, Oak Ridge, Tennessee, USA
Brookhaven National Laboratory (BNL), Electron-Ion Collider, Upton, New York, USA
JLab, Newport News, Virginia, USA
BNL, Upton, New York, USA
BNL, Upton, New York, USA
FRIB, East Lansing, Michigan, USA
ODU, Norfolk, Virginia, USA
ORNL RAD, Oak Ridge, Tennessee, USA
LBNL, Berkeley, California, USA
JLab, Newport News, Virginia, USA
The Electron Ion Collider (EIC) presently under construction at Brookhaven National Laboratory will collide polarized high energy electron beams with hadron beams with luminosity up to 1034 cm-2 s-1 in the center mass energy range of 20 to 140 GeV. Crab cavities are used to compensate the geometric luminosity due to a large crossing angle in the EIC. However, it was found that the phase noise in crab cavities will generate a significant emittance growth for hadron beams and its tolerance from analytical calculation is very small for the Hadron Storage Ring (HSR) of the EIC. In this paper, we report on 6-D symplectic particle tracking to estimate the proton emittance growth rate, especially in the vertical plane, for the HSR with weak-strong beam-beam and other machine or lattice errors.