Liepe Group: About us

Current Graduate Students

Dan Gonnella

Office: 327 Newman Lab, Cornell University
Tel: + 1 (607) 255-4397
email: dg433@cornell.edu

B.A., Clarkson University (2011)

Research topics:
Causes of quench in superconducting RF cavities; sources of residual resistance.

Sam Posen

Office: 327 Newman Lab, Cornell University
Tel: + 1 (607) 255-4397
email: sep93@cornell.edu
personal website

NSERC PGS D fellowship (2011 - current)
Best Student Poster Prize, IPAC (2011)
Most Outstanding Student Poster Award, SRF Conference (2011)
Cornell University Graduate Fellowship (2010 - 2011)
NSERC PGS M fellowship (2009 - 2010)
B.Sc. Engineering Physics, Queen's University, Engineering Physics Medal (2009)

Research topics:
Fabrication, physics and performance of higher temperature superconductors like niobium-3-tin in microwave fields; design and optimization of the next generation cryomodules for CW operation; higher-order mode excitation in superconducting RF cavities.

Nick Valles

Office: 327 Newman Lab, Cornell University
Tel: + 1 (607) 255-4397
email: nrv5@cornell.edu
personal website

M.Sc., Cornell University (2011)
SAGE fellowship, Cornell University (2009)
B.S. in Physic and Mathematics, Summa Cum Laude, Andrews University (2008)

Research topics:
Critical magnetic RF field and metastability of the superconductor niobium at low temperatures; design and optimization of superconducting RF cavities for particle accelerators like the Cornell ERL.

Yi Xie

Office: 327 Newman Lab, Cornell University
Tel: + 1 (607) 255-4397
email: yx39@cornell.edu
personal website

M.Sc., Cornell University (2007)
M.Sc., Peking University (2005)

Research topics:
Development of sample test system for measuring high field RF properties of higher temperature superconductors like niobium-3-tin and MgB2; thermal quench by geometrical surface defects.