CLASSE NEWS | 14 Nov 2012
A cavity with record high quality factor Q0 was recently measured at Cornell by graduate student Daniel Gonnella. The cavity received a Buffered Chemical Polish followed by a 5-day heat treatment at 1000C. The cavity's intrinsic quality factor was 2.8*1011 at 1.4 K at low fields, corresponding to a very low residual surface resistance of (0.35 ± 0.1) nΩ, a value among some of the lowest recorded.
This cutting-edge result illustrates the ongoing effort at CLASSE to be at the forefront of superconducting RF physics, where the development of very high Q cavities is crucial for the efficient operation of next generation CW SRF particle accelerators such as Cornell's Energy Recovery Linac or Fermilab's Project X.
Dan is in his second year of PhD studies in the SRF group. His advisor is Matthias Liepe.
Cornell Grad Dan Gonnella Measures Record High Q Factor
Left: Quality factor of the cavity as a function of accelerating electric field. Right: Cornell Grad Dan Gonnella.