JLab, Newport News, Virginia, USA
RadiaSoft LLC, Boulder, Colorado, USA
BNL, Upton, New York, USA
DESY, Hamburg, Germany
Cornell University, Ithaca, New York, USA
Tech-X, Boulder, Colorado, USA
SLAC, Menlo Park, California, USA
ANL, Lemont, Illinois, USA
ODU, Norfolk, Virginia, USA
Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
Douglas Consulting, York, Virginia, USA
Muons, Inc, Illinois, USA
Northern Illinois University, DeKalb, Illinois, USA
Stanford University, Stanford, California, USA
Texas A&M University, College Station, USA
Fermilab, Batavia, Illinois, USA
FRIB, East Lansing, Michigan, USA
CalPoly, San Luis Obispo, California, USA
MIT, Cambridge, Massachusetts, USA
LBNL, Berkeley, California, USA
Dimtel, Redwood City, California, USA
NSCL, East Lansing, Michigan, USA
ANL, Lemont, Illinois, USA
JLab, Newport News, Virginia, USA
A recent assessment of the scientific merit for a future Electron Ion Collider (EIC) in the US, by the National Academy of Sciences, found that such a facility would be unique in the world and would answer science questions that are compelling, fundamental, and timely. This assessment confirmed the recommendations of the 2015 Nuclear Science Advisory Committee for an EIC with highly polarized beams of electrons and ions, sufficiently high luminosity and variable center-of-mass (CM) energy. The baseline design of Jefferson Lab Electron-Ion Collider (JLEIC) has been updated to 100 GeV CM energy, corresponding to 200 GeV proton energy. We here present a high-energy design for the JLEIC ion complex. It consists of a 135 MeV injector linac, a 6-GeV non figure-8 pre-booster ring and a 40-GeV large ion booster, which could also serve as electron storage ring (e-ring). The energy choice in the accelerator chain is beneficial for a future upgrade to 140 GeV CM energy. The large booster is designed with the same shape and size of the original e-ring allowing for the option of building separate electron and ion rings by stacking them in the same tunnel along with the ion collider ring.
JLab, Newport News, Virginia, USA
ODU, Norfolk, Virginia, USA
JLab, Newport News, Virginia, USA
JLab, Newport News, Virginia, USA
SLAC, Menlo Park, California, USA
LBNL, Berkeley, California, USA
In a collider, stronger focusing at the interaction point (IP) for low beta-star and high luminosity produces large beams at final focusing quadrupoles (FFQs). To achieve the high luminosity requirement in the Jefferson Lab Electron-Ion Collider (JLEIC), the interaction region (IR) beta functions peak at 4.2 km in downstream FFQs. These large beta functions and FFQ multipoles reduce the dynamic aperture (DA) of the ring. A study of the multipole effects on the DA was performed to determine limits on multipoles, and to include a multipole compensation scheme to increase the DA and beam lifetime.
JLab, Newport News, Virginia, USA
BNL, Upton, New York, USA
MIPT, Dolgoprudniy, Moscow Region, Russia
Science and Technique Laboratory Zaryad, Novosibirsk, Russia
The transparent spin mode has been proposed as a new technique for preservation and control of the spin polari-zation of ion beams in a synchrotron. The ion rings of the proposed Jefferson Lab Electron-Ion Collider (JLEIC) adopted this technique in their figure-8 design. The transparent spin mode can also be setup in a racetrack with two identical Siberian snakes. There is a proposal to test the predicted features of the spin transparent mode in Relativistic Heavy Ion Collider (RHIC), which already has all of the necessary hardware capabilities. We have earlier analytically estimated the setup parameters and developed a preliminary experimental plan. In this paper we describe simulation setup and benchmarking for the proposed experiment using a Zgoubi model of RHIC.