Argonne Accelerator Institute Members

Vinit Kumar Kumar Picture
Phone: +91-731-2488020
E-mail address: vinit@aps.anl.gov
Division and group: BP&FEL Laboratory, RRCAT, Indore, India.

Areas of Research Interest

Free-electron laser (FEL) theory and design, Undulator development, Beam dynamics in Photocathode gun, Smith-Purcell FELs.

My current interest is in developing self-consistent three-dimensional theory of Smith-Purcell FELs. In a Smith-Purcell FEL, the electron beam interacts with the co-propagating surface electromagnetic mode supported by the reflection grating. In collaboration with Kwang-Je Kim, I have developed a one-dimensional theory of interaction of surface mode with the electron beam and included the effects due to attenuation of surface mode (due to finite conductivity of grating material) and the effect of end reflection etc. I am currently developing a three-dimensional theory, which will include diffraction effects. In addition to work on Smith-Purcell FELs, I also work on high gain FEL theory and simulation, low gain FEL oscillator simulation, undulator development and beam dynamics in photocathode gun.

Selected List of Publications

  • V. Kumar, S. Krishnagopal, W.M. Fawley, Start-up of FEL oscillator from shot noise, Presented at APAC 2007.
  • Vinit Kumar and Kwang-Je Kim, Analysis of Smith-Purcell Free-Electron Lasers, Physical Review E 73 026501 (2006).
  • Y. Ding, P. Emma, Z. Huang and V. Kumar, Optical Klystron enhancement to SASE x-ray FELs, Phys. Rev. ST Accel. Beams, 9, 070702 (2006).
  • Vinit Kumar and Kwang-Je Kim, Optimization of parameters of Smith-Purcell BWO, Proceedings of FEL Conference, 67 (2006).
  • Vinit Kumar and Kwang-Je Kim, Analysis of Smith-Purcell BWO with end reflections, Proceedings of FEL conference, 71 (2006).
  • Vinit Kumar and Kwang-Je Kim, Calculation of Reflection Matrix Elements of a Grating for Growing Evanescent Waves, Proceedings of PAC, 1616 (2005).
  • S. Krishnagopal, V. Kumar, S. Maiti, S. S. Prabhu, S. K. Sarkar, Free Electron Laser and Applications, Current Science 87 1066 (2004).
  • Vinit Kumar and Srinivas Krishnagopal, Start-up and saturation in SASE FELs using a time-independent analysis, Physical Review E 65 016503 (2001).
  • Vinit Kumar and Srinivas Krishnagopal, Growth of transverse coherence in SASE FELs, Nuclear Instruments and Methods A 445 77 (2000).