Author: Holma, J.
Paper Title Page
THPO032 Preliminary Design of an Inductive Adder for CLIC Damping Rings 3409
 
  • J. Holma, M.J. Barnes
    CERN, Geneva, Switzerland
  
  The Com­pact Lin­ear Col­lid­er (CLIC) study is ex­plor­ing the scheme for an elec­tron-positron col­lid­er with high lu­mi­nos­i­ty and a nom­i­nal cen­tre-of-mass en­er­gy of 3 TeV. The CLIC damp­ing rings will pro­duce ul­tra-low emit­tance, with high bunch charge, nec­es­sary for the lu­mi­nos­i­ty per­for­mance of the col­lid­er. To limit the beam emit­tance blow-up due to os­cil­la­tions, the pulse power mod­u­la­tors for the damp­ing rings kick­ers must pro­vide ex­treme­ly flat, high-volt­age puls­es: spec­i­fi­ca­tions call for a 160 ns du­ra­tion flat­top of 12.5 kV, 250 A, with a com­bined rip­ple and droop of not more than ±0.02 %. A sol­id-state mod­u­la­tor, the in­duc­tive adder, is a very promis­ing ap­proach to meet­ing the de­mand­ing spec­i­fi­ca­tions; this topol­o­gy al­lows the use of both dig­i­tal and ana­logue mod­u­la­tion. To ef­fec­tive­ly use mod­u­la­tion tech­niques to achieve such low rip­ple and droop re­quires an in-depth knowl­edge of the be­haviour of the sol­id-state switch­ing com­po­nents and their gate drivers, as well as a good un­der­stand­ing of the over­all cir­cuit be­haviour. This paper de­scribes the ini­tial de­sign of the in­duc­tive adder.