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Title: Parameters for eRHIC

Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
Report Number(s):
R&D Project: KBCH139; KB0202011
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: 8th International Particle Accelerator Conference (IPAC17); Bella Center, Copenhagen, Denmark; 20170514 through 20170519
Country of Publication:
United States

Citation Formats

Palmer R. B., and Montag, C. Parameters for eRHIC. United States: N. p., 2017. Web.
Palmer R. B., & Montag, C. Parameters for eRHIC. United States.
Palmer R. B., and Montag, C. Sun . "Parameters for eRHIC". United States. doi:.
title = {Parameters for eRHIC},
author = {Palmer R. B. and Montag, C.},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun May 14 00:00:00 EDT 2017},
month = {Sun May 14 00:00:00 EDT 2017}

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  • No abstract prepared.
  • CLAS12 is a full acceptance, general purpose detector for high luminosity electron scattering experiments, it is essential for high precision measurements of GPDs and TMDs in the valence region. It provides new insight into: (1) quark orbital angular momentum contributions to the nucleon spin; (2) 3D structure of the nucleon's interior and correlations; and (3) quark flavor polarization. EIC will extend studies of 3D nucleon structure, to low x and high Q{sup 2}, important for all processes of interest: (1) deeply virtual exclusive processes (DVCS, DVMP); and (2) semi-inclusive meson production with polarized beam and polarized targets.
  • Beam-beam effects present one of major factors limiting the luminosity of colliders. In the linac-ring option of eRHIC design, an electron beam accelerated in a superconducting energy recovery linac collides with a proton beam circulating in the RHIC ring. There are some features of beam-beam effects, which require careful examination in linac-ring configuration. First, the beam-beam interaction can induce specific head-tail type instability of the proton beam referred to as a ''kink'' instability. Thus, beam stability conditions should be established to avoid proton beam loss. Also, the electron beam transverse disruption by collisions has to be evaluated to ensure beammore » quality is good enough for the energy recovery pass. In addition, fluctuations of electron beam current and/or electron beam size, as well as transverse offset, can cause proton beam emittance growth. The tolerances for those factors should be determined and possible countermeasures should be developed to mitigate the emittance growth. In this paper, a soft Gaussian strong-strong simulation is used to study all of mentioned beam-beam interaction features and possible techniques to reduce the emittance growth.« less
  • The development of future facilities relevant to the study of deep inelastic scattering at BNL is described.
  • eRHIC[1][2][3], a future high luminosity electron-ion collider at Brookhaven National Laboratory (BNL), will add polarized electrons to the list of colliding species in RHIC. A 10-30 GeV electron energy recovery linac (ERL) will require up to six passes around the RHIC 3.8 km circumference. We are developing and testing small (5 mm) gap dipole and quadrupole magnets and vacuum chambers for cost-effective eRHIC passes [4]. We are also studying the sensitivity of eRHIC pass optics to magnet and alignment errors in such a small magnet structure. We present the magnetic and mechanical designs of the small gap eRHIC components andmore » prototyping test progress.« less