Dhananjay (DJ) Ravikumar

Cryogenic Research Engineer





PhD, Cryogenics – Stony Brook University, Stony Brook, NY (2014-2018)
MSc, Theoretical Physics – University of Glasgow, Glasgow, Scotland (2011-2012)
B.Tech, Mechanical Engineering – SASTRA University, Thanjavur, India


Thermal physics, cryogenic heat transfer, thermal radiation, cryogenic system design, large scale cryogenic systems.


Primary interests include science and engineering at ultra-cold temperatures – cryogenics.

Experience in the past has included:

  • Solving heat transfer problems on cryogenic components such as superconducting radio frequency (SRF) cavities
  • optimizing heat removal at different temperatures to maximize efficiency of the large-scale cryogenic systems
  • designing cryogenic systems that can mitigate microphonics for SRF cavities
  • designing the large-scale cryogenic systems to cool accelerating cavities for the electron-ion collider at Brookhaven National Laboratory
  • designing cryogenic systems for a compact nuclear fusion device – SPARC.

Current research is focused on millikelvin cryogenics. In particular, the design and analysis of advanced dilution refrigerators for quantum computers.


DJ Ravikumar, Y. Than and J.P. Longtin Eliminating flow induced microphonics in a superfluid helium cryogenic system Cryogenics 014, 102984, 2019

DJ Ravikumar, Y Than and J.P. Longtin Heat Transfer Study on the Beamline for an electron – ion Collider at BNL Nuclear Instruments and Methods in Physics Research A 903 (C), 114-118

Y Than and DJ Ravikumar Preliminary load requirements for the electron – ion collider at Brookhaven National Laboratory. IOP conference series: Materials Science and Engineering278 (1), 012110

DJ Ravikumar, Y Than and J.P. Longtin Thermal considerations in the cryogenic regime for the BNL double ridge higher order mode waveguide Physical Review Accelerators and Beams 20 (9), 093201.

An up-to-date listing can be found on my google scholar page