Optimization and analysis of code-division multiplexed TES   microcalorimeters
  We are developing code-division multiplexing (CDM) systems for transition-edge sensor arrays with the goal of reaching multiplexing factors in the hundreds. We report on x-ray measurements made with a four-channel prototype CDM system that employs a flux-summing architecture, emphasizing data-analysis issues. We describe an empirical method to determine the demodulation matrix that minimizes cross-talk. This CDM system achieves energy resolutions of between 2.3 eV and 3.0 eV FWHM at 5.9 keV. 
J. W. Fowler, W. B. Doriese, G. C. Hilton, K. D. Irwin, D. R. Schmidt,   G. M. Stiehl, D. S. Swetz, J. N. Ullom, and L. R. V...
physics.ins-det astro-ph.IM