Chrystian M. Posada Arbeláez

  • Postdoctoral Appointee
  • Bldg. 241, B168A
  • Phone: 630-252-5886
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    Chrystian Posada received a Ph.D. in Nuclear Engineering from Missouri University of Science and Technology. Currently, he is a postdoctoral appointee in Argonne’s Magnetic Films Group in the Materials Science Division.

    He is working on the fabrication of the third generation camera (SPT-3G) for CMB measurements in the South Pole Telescope. The purpose of this project is to develop a receiver with increased sensitivity to be deployed in the South Pole Telescope in December 2015 for CMB measurements. The SPT-3G camera is composed of ten hexagonal modules; each of them populated with 271 multi-chroic pixels. Each pixel has six low temperature detectors, denominated Transition Edge Sensors. In consequence, each pixel is sensitive to three observing bands (90 GHz, 150 GHz, and 220 GHz) and two polarizations, for a total of ~16000 detectors in the full array. The improvement in sensitivity provided by the SPT-3G receiver will exploit the full power of ground-based CMB observations. It will look at the sky for four years (2016 – 2019) with the objective of extracting the wealth of cosmological information available from CMB polarization, in particular with regards to cosmic inflation and neutrinos.

Professional Education

  • Ph.D. Nuclear Engineering, Missouri University of Science and Technology, Missouri, USA, 2014. Thesis: “Development of a Nitrogen Incorporated Ultrananocrystalline Diamond Film Based Field Emitter Array for a Flat Panel X-Ray Source”
  • M.Sc. Nuclear Engineering, Missouri University of Science & Technology, 2011.
  • B.S. Chemical Engineering, National University of Colombia, Medellín, Colombia, 2008.

Awards

  • 2nd and 3rd Prize Graduate Research Showcase, 2012, Council of Graduate Students, Missouri University of Science and Technology

Experimental Techniques

  • UV and laser photolithography
  • Thin film deposition
  • Microfabrication
  • Dry and Wet Etching
  • SEM
  • Electron Beam Characterization

Publications

  • C. L. Chang, et. al. “Low Loss Superconducting Microstrip Development at Argonne National Lab,” IEEE Transactions on Applied Superconductivity 25 250105 (2015).
  • C. M. Posada, E. Grant, R. Divan,A. V. Sumant, D. Rosenmann, L. Stan, H. K. Lee, and C. H. Castano, “Nitrogen Incorporated Ultrananocrystalline Diamond (N-UNCD) Based Field Emitter Array for a Flat-Panel X- ray Source,” J. of Appl. Physics 115 134506 (2014).
  • C. M. Posada, E. Grant, C. Castaño, H. Lee, “Simulation of the Electron Field Emission Characteristics of a Flat Panel X-Ray Source,” J. of Vacuum Sci. and Tech. B 30 022201 (2012).
  • E. Grant, C. M. Posada, C. Castaño, H. Lee, “Monte Carlo Simulations of a Distributed Flat-Panel Micro X-ray Source,” Appl. Radiat. Isot. 70 1658 (2012).
  • C. M. Posada, E. J. Grant, H. K. Lee and C. H. Castaño, “Electron Field Emission PIC Coupled with MCNPX Simulation of a CNT-based Flat-Panel X-Ray Source,” SPIE Proc. 7961 796108 (2011).
  • E. J. Grant, C. M. Posada, A. Avachat, H. K. Lee, C. H. Castano, R. Divan,A. Summant, D. Lopez, “Construction of a Flat-Panel Cold Cathode X-ray Source” SPIE defense, security and sensing, 8709, (2013).
  • E. Álvarez, O. Jímenez, C. M. Posada, C. Rojano, J. Gil, C. García, D. Durango. “Antioxidant activity and phenolic content of extracts from berries of two species of vismia genus (guttiferae)” Revista De La Facultad De Química Farmacéutica, 15 155 (2008).