Hi! I'm a physics postdoc at the University of Washington/CENPA, where we build precision experimental tests of gravity.
Together with graduate student Erik Shaw and the Eöt-Wash Group, we're building a new test of the Equivalence Principle, the empirical fact that gravity pulls on all things equally, independent of composition.
My thesis experiment was a new test of Newton's gravitational inverse square law at distances shorter than 100 microns. You can find my thesis here, and all of the code to generate that analysis and document from raw data here.
When I am not in the lab, I am often in the mountains.
Course link:
Physics 585, Autumn 2016
PhD. Thesis: A Sub-Millimeter Parallel-Plate Test of Gravity (2015)
A high-precision mechanical absolute-rotation sensor
Krishna Venkateswara, Charles A. Hagedorn, Matthew D. Turner, Trevor Arp, Jens H. Gundlach. Review of Scientific Instruments, 85, 015005 (2014).
A reference-beam autocollimator with nanoradian sensitivity from mHz to kHz and dynamic range of 10^7
T. B. Arp, C. A. Hagedorn, S. Schlamminger, and J. H. Gundlach. Review of Scientific Instruments, 84, 095007 (2013).
Brownian force noise from molecular collisions and the sensitivity of advanced gravitational wave observatories
R. Dolesi, M. Hueller, D. Nicolodi, D. Tombolato, S. Vitale, P. J. Wass, W. J. Weber, M. Evans, P. Fritschel, R. Weiss, J. H. Gundlach, C. A. Hagedorn, S. Schlamminger, G. Ciani, and A. Cavalleri, Physical Review D 84, 063007 (2011).
Picoradian deflection measurement with an interferometric quasi-autocollimator using weak value amplification
M. D. Turner, C. A. Hagedorn, S. Schlamminger, and J. H. Gundlach, Optics Lett. 36, 1479-1481 (2011).
Indirect Evidence for Lévy Walks in Squeeze Film Damping
S. Schlamminger, C.A. Hagedorn and J.H. Gundlach, Physical Review D 81, 123008 (2010).
Charge Management for Gravitational Wave Observatories using UV LEDs
S.E. Pollack, M.D. Turner, S. Schlamminger, C.A. Hagedorn, and J.H. Gundlach, Physical Review D 81, 021101(R) (2010).
High Sensitivity Torsion Balance Tests for LISA Proof Mass Modeling
S. Schlamminger, C. A. Hagedorn, M. G. Famulare, S. E. Pollack, J. H. Gundlach. Laser Interferometer Space Antenna: 6th International LISA Symposium. AIP Conference Proceedings, Vol. 873 (2006).
Quality Factors of Bare and Metal-Coated Quartz and Fused Silica Torsion Fibers
C.A. Hagedorn, S. Schlamminger, J.H. Gundlach, in Laser Interferometer Space Antenna: 6th International LISA Symposium, AIP Conference Proceedings, Vol. 873 (2006).
Interferometric quasi-autocollimator,
M.D. Turner, J.H. Gundlach, C.A. Hagedorn, S. Schlamminger, US Patent Application 20120242999
(published September 27, 2012).
Work Links:
Our research group / Résumé / Nanoradian Instruments
Side Projects:
Photography / AvySticker.com / MeasuredMass.com / Trip Reports
Email: charlie7hagedorn.xyz; converting the 7 to an @.
