ACME Electron EDM

Papers

ACME I

Proposal for the experiment: Search for the electric dipole moment of the electron with thorium monoxide. A.C. Vutha, W.C. Campbell, Y.V. Gurevich, N.R. Hutzler, M. Parsons, D. Patterson, E. Petrik, B. Spaun, J.M. Doyle, G. Gabrielse and D. DeMille. Journal of Physics B 43 074007 (2010).
A study of our molecular beam: A cryogenic beam of refractory, chemically reactive molecules with expansion cooling. N. R. Hutzler, M. Parsons, Y. V. Gurevich, P. W. Hess, E. Petrik, B. Spaun, A. C. Vutha, D. DeMille, G. Gabrielse, J. M. Doyle. Phys. Chem. Chem. Phys. (2011)
Measurement of magnetic and electric dipole moments in the EDM state of ThO: Magnetic and electric dipole moments of the ^3\Delta_1 state in ThO. A. C. Vutha, B. Spaun, Y. V. Gurevich, N. R. Hutzler, E. Kirilov, J. M. Doyle, G. Gabrielse, D. DeMille. Phys. Rev. A 84, 034502 (2011)
ICAP 2012 Proceedings: Overview and Update: Advanced Cold Molecule Electron EDM. W. C. Campbell, C. Chan, D. DeMille, J. M. Doyle, G. Gabrielse, Y. V. Gurevich, P. W. Hess, N. R. Hutzler, E. Kirilov, B. O'Leary, E. S. Petrik, B. Spaun, and A. C. Vutha. EPJ Web of Conferences 57, 02004 (2013)
Spin precession measurement scheme: Shot-noise-limited spin measurements in a pulsed molecular beam. E. Kirilov, W.C. Campbell, J.M. Doyle, G. Gabrielse, Y.V. Gurevich, P.W. Hess, N.R. Hutzler, B.R. O'Leary, E. Petrik, B. Spaun, A.C. Vutha, D. DeMille. Phys. Rev. A 88, 013844 (2013)
ACME I Result: Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron. The ACME Collaboration: J. Baron, W. C. Campbell, D. DeMille, J. M. Doyle, G. Gabrielse, Y. V. Gurevich, P. W. Hess, N. R. Hutzler, E. Kirilov, I. Kozyryev, B. R. O'Leary, C. D. Panda, M. F. Parsons, E. S. Petrik, B. Spaun, A. C. Vutha, A. D. West. Science 343, p. 269-272 (2014)
Study of higher-order Zeeman effects in our molecule: Zeeman interaction in ThO H^3\Delta_1 for the electron EDM search. A.N. Petrov, L.V. Skripnikov, A.V. Titov, N.R. Hutzler, P.W. Hess, B.R. O'Leary, B. Spaun, D. DeMille, G. Gabrielse, and J.M. Doyle. Phys. Rev. A 89, 062505 (2014)
Full technical report on ACME I result: Methods, Analysis, and the Treatment of Systematic Errors for the Electron Electric Dipole Moment Search in Thorium Monoxide. The ACME Collaboration: J. Baron, W. C. Campbell, D. DeMille, J. M. Doyle, G. Gabrielse, Y. V. Gurevich, P. W. Hess, N. R. Hutzler, E. Kirilov, I. Kozyryev, B. R. O'Leary, C. D. Panda, M. F. Parsons, E. P. West, B. Spaun, A. C. Vutha, A. D. West. New Journal of Physics 19 073029 (2017)

ACME II

Demonstration of efficient STIRAP to the H-state of ThO: Stimulated Raman adiabatic passage preparation of a coherent superposition of ThO H^3\Delta_1 states for an improved electron electric-dipole-moment measurement. C. D. Panda, B. R. O'Leary, A. D. West, J. Baron, P. W. Hess, C. Hoffman, E. Kirilov, C. B. Overstreet, E. P. West, D. DeMille, J. M. Doyle, and G. Gabrielse Phys. Rev. A 93, 052110 (2016)
ACME II result: Improved limit on the electric dipole moment of the electron. The ACME Collaboration: V. Andreev, D. G. Ang, D. DeMille, J. M. Doyle, G. Gabrielse, J. Haefner, N. R. Hutzler, Z. Lasner, C. Meisenhelder, B. R. O'Leary, C. D. Panda, A. D. West, E. P. West & X. Wu. Nature 562, 355-360 (2018).

Advanced ACME (ACME III)

Attaining the shot noise limit: Attaining the shot-noise-limit in the ACME measurement of the electron electric dipole moment. C.D. Panda, C. Meisenhelder, M. Verma, D.G. Ang, J. Chow, Z. Lasner, X. Wu, D. DeMille, J.M. Doyle, G. Gabrielse. Journal of Physics B 52, 235003 (2019)
Investigations of the Q-state of ThO for molecular lensing and co-magnetometry: The metastable Q ³&Delta₂ state of ThO: a new resource for the ACME electron EDM search X. Wu, Z. Han, J. Chow, D. G. Ang, C. Meisenhelder, C. D. Panda, E. P. West, G. Gabrielse, J. M. Doyle, D. DeMille New J. Phys 22, 023013 (2020)
Measuring and suppressing the OCT of SiPM designed for ACME III: Suppression of the optical crosstalk in a multi-channel silicon photomultiplier array T. Masuda, D. Ang, N. Hutzler, C. Meisenhelder, N. Sasao, S. Uetake, X. Wu, D. DeMille, G. Gabrielse, J. Doyle, and K. Yoshimura Opt. Express 29, 16914-16926 (2021).
SiPM module for ACME III: SiPM module for the ACME III electron EDM search A. Hiramoto, T. Masuda, Daniel Ang, C. Meisenhelder, C. Panda, N. Sasao, S. Uetake, X. Wu, D. DeMille, J.M. Doyle, G. Gabrielse, K. Yoshimura Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 1045, 2023, 167513(2022)
Measurement of the EDM state radiative lifetime in ThO: Measurement of the H³&Delta₁ radiative lifetime in ThO D.G. Ang, C. Meisenhelder, C. D. Panda, X. Wu, D. DeMille, J.M. Doyle, G. Gabrielse Phys. Rev. A 106, 022808(2022)
Demonstration of electrostatic lensing flux enhancement: Electrostatic focusing of cold and heavy molecules for the ACME electron EDM search X. Wu,, P. Hu, Z. Han, D.G. Ang, C. Meisenhelder, G. Gabrielse, J.M. Doyle, D. DeMille New J. Phys. 24 073043(2022)

Theses

Amar Vutha: A search for the electric dipole moment of the electron using thorium monoxide. Yale University, 2011.
Yulia Gurevich: Preliminary Measurements for an Electron EDM Experiment in ThO. Harvard University, 2014.
Nick Hutzler: A New Limit on the Electron Electric Dipole Moment: Beam Production, Data Interpretation, and Systematics. Harvard University, 2014.
Paul Hess: Improving the Limit on the Electron EDM: Data Acquisition and Systematics Studies in the ACME Experiment. Harvard University, 2014.
Ben Spaun: A Ten-Fold Improvement to the Limit of the Electron Electric Dipole Moment. Harvard University, 2014.
Brendon O'Leary: In search of the electron's electric dipole moment in thorium monoxide: an improved upper limit, systematic error models, and apparatus upgrades. Yale University, 2016.
Vitaly Andreev: Polarimetry on the Advanced Cold Molecule Electron Electric Dipole Moment Experiment. Master Thesis, Technische Universitaet Muenchen, 2016.
Elizabeth P. West: A Thermochemical Cryogenic Buffer Gas Beam Source of ThO for Measuring the Electric Dipole Moment of the Electron. Harvard University, 2017.
Cristian D. Panda An order of magnitude improved limit on the electric dipole moment of the electron. Harvard University, 2018.
Zack D. Lasner Order-of-magnitude-tighter bound on the electron electric dipole moment. Yale University, 2019.
Daniel Ang Progress towards an improved measurement of the electric dipole moment of the electron. Harvard University, 2023.
Cole Meisenhelder Advances in the Measurement of the Electron Electric Dipole Moment. Harvard University, 2023.