Author: Lomberg, B.B.D.
Paper Title Page
TUPF22 Beam Halo Monitor Based on an HD Digital Micro Mirror Array 557
 
  • B.B.D. Lomberg, C.P. Welsch
    The University of Liverpool, Liverpool, United Kingdom
  • B.B.D. Lomberg, C.P. Welsch
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  
  Funding: This work is supported by the European Union under contract PITN-GA-2011-289485 and by STFC under the Cockcroft Institute Core Grant No. ST/G008248/1.
A beam halo mon­i­tor is an es­sen­tial de­vice to pur­sue stud­ies of halo par­ti­cles pro­duced in any par­ti­cle ac­cel­er­a­tor as to in­ves­ti­gate the ef­fects of dis­tur­bances, such as field kicks, gra­di­ent er­rors, etc. A fast, least in­tru­sive, high dy­namic range mon­i­tor will allow the de­tec­tion and po­ten­tially con­trol of par­ti­cles at the tail of a trans­verse beam dis­tri­b­u­tion. Light gen­er­ated by a beam of charged par­ti­cles is rou­tinely used for beam di­ag­nos­tic pur­poses. A halo mon­i­tor based on a dig­i­tal mi­cro-mir­ror de­vice (DMD) used to gen­er­ate an adap­tive op­ti­cal mask to block light in the core of the emit­ted light pro­file and hence limit ob­ser­va­tion to halo par­ti­cles has been de­vel­oped in close col­lab­o­ra­tion with CERN and Uni­ver­sity of Mary­land. In this con­tri­bu­tion an evo­lu­tion of this mon­i­tor is pre­sented. A high de­f­i­n­i­tion mi­cro-mir­ror array with 1920x1080 pix­els has been em­bed­ded into a MAT­LAB-based con­trol sys­tem, giv­ing ac­cess to even higher mon­i­tor res­o­lu­tion. A mask­ing al­go­rithm has also been de­vel­oped that au­to­mates mask gen­er­a­tion based on user-de­fin­able thresh­olds, con­verts be­tween CCD and DMD geome­tries, processes and analy­ses the beam halo sig­nal and is pre­sented in de­tail. 		 
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