Year: 2014
Type: article
Abstract: A laserwire transverse electron beam size measurement system has been developed and operated at the Accelerator Test Facility 2 at the High Energy Accelerator Research Organization, Japan (KEK). Special electron beam optics were developed to create an approximately $1\ifmmode\times\else\texttimes\fi{}100\text{ }\text{ }\ensuremath{\mu}\mathrm{m}$ ($\text{vertical}\ifmmode\times\else\texttimes\fi{}\text{horizontal}$) electron beam at the laserwire location, which was profiled using 150 mJ, 71 ps laser pulses with a wavelength of 532 nm. The precise characterization of the laser propagation allows the non-Gaussian laserwire scan profiles caused by the laser divergence to be deconvolved. A minimum vertical electron beam size of $1.07\ifmmode\pm\else\textpm\fi{}0.06(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.05(\text{sys})\text{ }\text{ }\ensuremath{\mu}\mathrm{m}$ was measured. A vertically focusing quadrupole just before the laserwire was varied while making laserwire measurements and the projected vertical emittance was measured to be $82.56\ifmmode\pm\else\textpm\fi{}3.04\text{ }\mathrm{pm}\text{ }\mathrm{rad}$.
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: The John Adams Institute for Accelerator Science, John Adams Institute Project Coordination, European Coordination for Accelerator Research and Development, The John Adams Institute for Accelerator Science, The John Adams Institute for Accelerator Science, John Adams Institute supplement 2011/12, G8152501232
OpenAlex ID: W2042425356