• J.G. Alessi, D.S. Barton, E.N. Beebe, S. Bellavia, O. Gould, A. Kponou, R.F. Lambiase, E.T. Lessard, V. LoDestro, R. Lockey, M. Mapes, D.R. McCafferty, A. McNerney, M. Okamura, A. Pendzick, D. Phillips, A.I. Pikin, D. Raparia, J. Ritter, J. Scaduto, L. Snydstrup, M. Wilinski, A. Zaltsman
  BNL, Upton, Long Island, New York
• T. Kanesue
  Kyushu University, Hakozaki
• U. Ratzinger, A. Schempp, J.S. Schmidt, M. Vossberg
  IAP, Frankfurt am Main

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.

A new heavy ion preinjector, consisting of an Electron Beam Ion Source (EBIS), an RFQ, and IH Linac, is under construction at Brookhaven National Laboratory. This preinjector will provide ions of any species at an energy of 2 MeV/u, resulting in increased capabilities for the Relativistic Heavy Ion Collider, and the NASA Space Radiation Laboratory programs. Initial operation of the EBIS and RFQ will be reported on, along with the status of the construction and installation of the remainder of the preinjector.

• V. Ptitsyn, J. Beebe-Wang, I. Ben-Zvi, A. Burrill, R. Calaga, X. Chang, A.V. Fedotov, H. Hahn, L.R. Hammons, Y. Hao, A. Kayran, V. Litvinenko, G.J. Mahler, C. Montag, B. Parker, A. Pendzick, S.R. Plate, E. Pozdeyev, T. Roser, S. Tepikian, D. Trbojevic, N. Tsoupas, J.E. Tuozzolo, G. Wang
  BNL, Upton, Long Island, New York
• E. Tsentalovich
  MIT, Middleton, Massachusetts

Funding: Work performed under US DOE contract DE-AC02-98CH1-886

Design of a medium energy electron-ion collider (MEeIC) is under development at Collider-Accelerator Department, BNL. The design envisions a construction of 4 GeV electron accelerator in a local area inside the RHIC tunnel. The electrons will be produced by a polarized electron source and accelerated in the energy recovery linac. Collisions of the electron beam with 100 GeV/u heavy ions or with 250 GeV polarized protons will be arranged in the existing IP2 interaction region of RHIC. The luminosity of electron-proton collisions at 10³² cm^-2 s^-1 level will be achieved with 40 mA CW electron current with presently available parameters of the proton beam. Efficient cooling of proton beam at the collision energy may bring the luminosity to 10³³ cm^-2 s^-1 level. The important feature of the MEeIC is that it would serve as first stage of eRHIC, a future electron-ion collider at BNL with both higher luminosity and energy reach. The majority of the MEeIC accelerator components will be used for eRHIC.