Professional Education


  • Doctor of Philosophy, Stanford University, ME-PHD (2015)
  • Master of Science, Stanford University, EE-MS (2014)
  • Bachelor of Engineering, Jadavpur University, Mechanical Engineering (2007)
  • Master of Science, University of Connecticut, Mechanical Engineering (2009)

All Publications


  • Scanned-wavelength-modulation-spectroscopy sensor for CO, CO2, CH4 and H2O in a high-pressure engineering-scale transport-reactor coal gasifier FUEL Sur, R., Sun, K., Jeffries, J. B., Socha, J. G., Hanson, R. K. 2015; 150: 102-111
  • High-sensitivity interference-free diagnostic for measurement of methane in shock tubes JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER Sur, R., Wang, S., Sun, K., Davidson, D. F., Jeffries, J. B., Hanson, R. K. 2015; 156: 80-87
  • Time-resolved in situ detection of CO in a shock tube using cavity-enhanced absorption spectroscopy with a quantum-cascade laser near 4.6 mu m OPTICS EXPRESS Sun, K., Wang, S., Sur, R., Chao, X., Jeffries, J. B., Hanson, R. K. 2014; 22 (20): 24559-24565
  • Application of wavelength-scanned wavelength-modulation spectroscopy H2O absorption measurements in an engineering-scale high-pressure coal gasifier APPLIED PHYSICS B-LASERS AND OPTICS Sun, K., Sur, R., Jeffries, J. B., Hanson, R. K., Clark, T., Anthony, J., Machovec, S., Northington, J. 2014; 117 (1): 411-421
  • TDLAS-based sensors for in situ measurement of syngas composition in a pressurized, oxygen-blown, entrained flow coal gasifier APPLIED PHYSICS B-LASERS AND OPTICS Sur, R., Sun, K., Jeffries, J. B., Hanson, R. K., Pummill, R. J., Waind, T., Wagner, D. R., Whitty, K. J. 2014; 116 (1): 33-42
  • Sensitive and rapid laser diagnostic for shock tube kinetics studies using cavity-enhanced absorption spectroscopy OPTICS EXPRESS Sun, K., Wang, S., Sur, R., Chao, X., Jeffries, J. B., Hanson, R. K. 2014; 22 (8): 9291-9300

    Abstract

    We report the first application of cavity-enhanced absorption spectroscopy (CEAS) using a coherent light source for sensitive and rapid gaseous species time-history measurements in a shock tube. Off-axis alignment and fast scanning of the laser wavelength were used to minimize coupling noise in a low-finesse cavity. An absorption gain factor of 83 with a measurement time resolution of 20 ┬Ás was demonstrated for C2H2 detection using a near-infrared transition near 1537 nm, corresponding to a noise-equivalent detection limit of 20 ppm at 296 K and 76 ppm at 906 K at 50 kHz. This substantial gain in signal, relative to conventional single-pass absorption, will enable ultra-sensitive species detection in shock tube kinetics studies, particularly useful for measurements of minor species and for studies of dilute reactive systems.

    View details for DOI 10.1364/OE.22.009291

    View details for Web of Science ID 000335902200046

    View details for PubMedID 24787817

  • Multi-species laser absorption sensors for in situ monitoring of syngas composition APPLIED PHYSICS B-LASERS AND OPTICS Sur, R., Sun, K., Jeffries, J. B., Hanson, R. K. 2014; 115 (1): 9-24
  • Laser-absorption sensing of gas composition of products from coal gasification Conference on Micro- and Nanotechnology Sensors, Systems, and Applications VI Jeffries, J. B., Sur, R., Sun, K., Hanson, R. K. SPIE-INT SOC OPTICAL ENGINEERING. 2014

    View details for DOI 10.1117/12.2049788

    View details for Web of Science ID 000342426300017

  • TDL absorption sensors for gas temperature and concentrations in a high-pressure entrained-flow coal gasifier PROCEEDINGS OF THE COMBUSTION INSTITUTE Sun, K., Sur, R., Chao, X., Jeffries, J. B., Hanson, R. K., Pummill, R. J., Whitty, K. J. 2013; 34: 3593-3601
  • On the rate constants of OH + HO2 and HO2 + HO2: A comprehensive study of H2O2 thermal decomposition using multi-species laser absorption PROCEEDINGS OF THE COMBUSTION INSTITUTE Hong, Z., Lam, K., Sur, R., Wang, S., Davidson, D. F., Hanson, R. K. 2013; 34: 565-571