Author: McCrady, R.C.
Paper Title Page
MOPLR072 The Effect of DTL Cavity Field Errors on Beam Spill at LANSCE 301
 
  • L. Rybarcyk, R.C. McCrady
    LANL, Los Alamos, New Mexico, USA
 
  The Los Alamos Neutron Science Center (LANSCE) accelerator comprises two (H+ and H) 750-keV Cockcroft-Walton style injectors, a 201.25-MHz, 100-MeV drift-tube linac (DTL) and an 805-MHz, 800-MeV coupled-cavity linac (CCL). As part of the LANSCE Risk Mitigation project a new digital low-level radio frequency (LLRF) control system is being deployed across the linac, starting with the DTL. Related to this upgrade, a study was performed where specific cavity field errors were simultaneously introduced in all DTL tanks about the nominal stable, low-spill, production set points to mimic LLRF control errors. The impact of these errors on the resultant beam spill was quantified for the nominal 100 μA, 800-MeV Lujan beam. We present the details of the measurement approach and results that show a rapid increase in total linac beam spill as DTL cavity field phase and amplitude errors are increased.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR072  
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