TY - CPAPER
AU - Thieberger, P.
AU - Altinbas, Z.
AU - Carlson, C.
AU - Chasman, C.
AU - Costanzo, M.R.
AU - Degen, C.
AU - Drees, K.A.
AU - Fischer, W.
AU - Gassner, D.M.
AU - Gu, X.
AU - Hamdi, K.
AU - Hock, J.
AU - Luo, Y.
AU - Marusic, A.
AU - Miller, T.A.
AU - Minty, M.G.
AU - Montag, C.
AU - Pikin, A.I.
AU - White, S.M.
TI - The Electron Backscattering Detector (eBSD), a New Tool for the Precise Mutual Alignment of the Electron and Ion Beams in Electron Lenses
J2 - Proc. of IBIC2014
AB - The Relativistic Heavy Ion Collider (RHIC) electron lenses, being commissioned to attain higher polarized proton-proton luminosities by partially compensating the beam-beam effect, require good alignment of the electron and proton beams. These beams propagating in opposite directions in a 5T solenoid have a typical rms width of 300 microns and need to overlap each other over an interaction length of about 2 m with deviations of less than ~50 microns. A new beam diagnostic tool to achieve and maintain this alignment is based on detecting electrons that are backscattered in close encounters with protons. Maximizing the intensity of these electrons ensures optimum beam overlap. The successful commissioning of these devices using 100 GeV/amu gold beams is described. Future developments are discussed that will further improve the sensitivity to small angular deviations.
PB - JACoW
CY - Geneva, Switzerland
SP - 129
EP - 133
KW - electron
KW - ion
KW - proton
KW - detector
KW - scattering
DA - 2014/10
PY - 2014
SN - 978-3-95450-141-0
UR - http://jacow.org/IBIC2014/papers/mopd02.pdf
ER -