• S. Boucher, P. Frigola, A.Y. Murokh
  RadiaBeam, Marina del Rey
• I. Jovanovic
  Purdue University, West Lafayette, Indiana
• J.B. Rosenzweig, G. Travish
  UCLA, Los Angeles, California

Funding: This work is supported by the US Defense Threat Reduction Agency SBIR contract HDTRA1-08-P-0035.

Conventional X-ray sources used for medical and industrial imaging suffer from low spectral brightness, a factor which severely limits the image quality that can be obtained. X-ray sources based on Inverse Compton Scattering (ICS) hold promise to greatly improve the brightness of X-ray sources. While ICS sources have previously been demonstrated, and have produced high-peak brightness X-rays, so far experiments have produced low average flux, which limits their use for certain important commercial applications (e.g. medical imaging). RadiaBeam Technologies is currently developing a high peak- and average-brightness ICS source, which implements a number of improvements to increase the interaction repetition rate, as well as the efficiency and stability of the ICS interaction itself. In this paper, we will describe these improvements, as well as plans for future experiments.

• 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.