TY - CPAPER
AU - Hofmann, T.
AU - Boorman, G.E.
AU - Bosco, A.
AU - Bravin, E.
AU - Gibson, S.M.
AU - Griesmayer, E.
AU - Kruchinin, K.O.
AU - Raich, U.
AU - Roncarolo, F.
AU - Zocca, F.
TI - Status of and Future Plans for the CERN LINAC4 Emittance Meter based on Laser Electron-Detachment and a Diamond Strip-Detector
J2 - Proc. of IBIC2014
AB - LINAC4 has started its staged commissioning at CERN. After completion it will accelerate high brightness H^{−} beams to 160 MeV. To measure the transverse profile and emittance of the beam, a non-destructive method based on electron photo-detachment is proposed, using a pulsed, fibre-coupled laser to strip electrons from the H^{−} ions. The laser can be focused and scanned through the H^{−} beam, acting like a conventional slit. A downstream dipole separates the neutral H⁰ beamlet, created by the laser interaction, from the main H^{−} beam, so that it can be measured by a diamond strip-detector. Combining the H⁰ beamlet profiles with the laser position allows the transverse emittance to be reconstructed. A prototype of this instrument was tested while commissioning the LINAC4 at 3 and 12 MeV. In this paper we shall describe the experimental setup, challenges and results of the measurements, and also address the characteristics and performance of the diamond strip-detector subsystem. In addition, the proposal for a permanent system at 160 MeV, including an electron detector for a direct profile measurement, will be presented.
PB - JACoW
CY - Geneva, Switzerland
SP - 83
EP - 87
KW - detector
KW - laser
KW - linac
KW - emittance
KW - electron
DA - 2014/10
PY - 2014
SN - 978-3-95450-141-0
UR - http://jacow.org/IBIC2014/papers/mopf15.pdf
ER -