Speaker
Massimiliano Putignano
(University of Liverpool)
Description
The operation of a least-interceptive transverse beam profile monitor based on a planar supersonic gas-jet target is reported. This monitoring design features least-interceptive operation under excellent vacuum conditions and provides fast acquisition of a fully bi-dimensional transverse profile. It bears application for ultra-low energy particle beams at future storage rings, but also e.g. for linacs at high currents and light source injectors. For instance, the Ultra-low energy Storage Ring (USR), part of the Facility for Antiproton and Ion Research (FAIR) in Germany will store antiprotons at energies of 20-300 keV. Such low energy particles are easily lost in any interceptive device, and will require vacuum levels better than 10-10 mbar. This contribution describes the operation principle of the monitor and analyses the factors affecting resolution and sensitivity. It also presents a set of numerical simulations analyzing the critical process of shaping the expanding jet by a nozzle-skimmer system and leading to geometry optimization for minimum curtain thickness and maximum homogeneity. Finally, experimental results and measured density profile maps are shown.
Author
Massimiliano Putignano
(University of Liverpool)
Co-authors
Dr
Carsten Welsch
(University of Liverpool and Cockcroft Institute)
Dominic Borrows
(University of Liverpool)
