## Summary

Accelerator physics, experimental elementary particle spin physics, spin-gravity interaction, foundations of quantum mechanics.

## Research Focus

My research in the Soviet Union was mostly in accelerator beam and spin physics. At ITEP I worked on their 7 GeV proton synchrotron project and developed a theory of non-linear betatron oscillations, betatron resonances and synchro-betatron resonances. At the Yerevan Physics Institute I did most of the conceptual design of their 5 GeV electron synchrotron; made the first theoretical design of direct muon (g-2) measurement; and published papers on radiation damping decrements (with E.K. Tarasov of ITEP) and on spin resonances; and I also proposed a 100x100 GeV electron-positron collider, an idea not accepted at the time. During a year of parallel work at the Budker Institute I made the theoretical discovery of quantum depolarization with V.N. Baier.

After arriving in the West I helped develop at CERN the idea of ion “shaking,” with consequent doubling of the number of accumulated anti-protons, and in the United States worked on an alternative design for the proposed B-factory at Cornell; participated in measuring the magnetic dipole moment of the muon at BNL; did theoretical work on systematic errors for proposals to measure the electric dipole moment of the proton, electron and deuteron; and published on quantum and classical indeterminism.

In retirement, I began theoretical work in cosmology, while continuing to pursue my interests in systematic errors, spin coherence time, spin-gravity effects and other theoretical issues related to the next generation measurement of the muon (g-2) and the proposed measurement of the proton, electron and deuteron EDMs.

## Publications

2020. with O. Kim et al., Reduction of coherent betatron oscillations in a muon g-2 storage ring experiment using RF fields. New J. Phys. **22**, 063002 (2020).

2016. with V. Anastassopoulos et al. A Storage Ring Experiment to Detect a Proton Electric Dipole Moment. Rev. Sci. Instrum. **87**, 115116 (2016).

2012. Yuri Orlov, Eanna Flanagan and Yannis Semertzidis, Spin rotation by Earth's gravitational field in a "frozen-spin" ring. Phys. Lett. A**376**, No. 45, 2822-2829 (2012).

2006. Yuri F. Orlov, William M. Morse and Yannis K. Semertzidis, Resonance method of electric-dipole-moment measurements in storage rings. Phys. Rev. Lett. **96**, 214802 (2006).

2006. with G.W. Bennett et al. (Muon g-2 Collaboration), Final report of the muon E821 anomalous magnetic moment measurement at BNL. Phys. Rev. D**73**, 072003 (2006).

2002. Yuri F. Orlov, Quantumlike bits and logic gates based on classical oscillators. Phys. Rev. A**66**, 052324 (2002).

2002. Yuri Orlov, Cenap S. Ozben and Yannis K. Semertzidis, Muon revolution frequency distribution from a partial-time Fourier transform of the g-2 signal in the muon g-2 experiment. Nucl. Instr. Meth. A**482**, 767-775 (2002).

1999. Yuri F. Orlov, Origin of quantum indeterminism and irreversibility of measurements. Phys. Rev. Lett. **82**, 243-246 (1999).

1999. Yuri F. Orlov, Complementary histories and collapse into the past in standard quantum mechanics. Int. J. Mod. Phys. B**13**, No. 20, 2629-2636 (1999).

1990. J. Marriner, D. Möhl, Y. Orlov, A. Poncet, and S. van der Meer, Experiments and practice in beam shaking. Particle Accelerators **30**, 13-20 (1990).

1965. V.N. Baier and Yu. F. Orlov, Quantum depolarization of electrons in a magnetic field. Soviet Physics—Doklady **10**, 1145-1147 (1966).

В. Н. Байер и Ю.Ф Орлов, Kвантовая деполяризация электронов в магнитном поле. ДАН **165**, вып. 4, стр. 783-785, 1965.

1963. Kh. A. Simonyan and Yu. F. Orlov, Anomalous resonance spin flip of a particle in a magnetic field. JETP **18**, 123-125 (1964).

Х. А. Симонян и Ю.Ф Орлов, Аномальный резонансый переворот спина в магнитном поле. ЖЭТФ **45**, вып. 2, cтр. 173-176, 1963.

1958. Yu. F. Orlov and E.K. Tarasov, Damping of oscillations in a cyclic electron accelerator. JETP **34**(7), 449-453 (September, 1958).

Ю.Ф Орлов и E. К. Тарасов, Затухание колебаний в электронном циклическом ускорителе. ЖЭТФ **34**, вып. 1, стр. 651-657, март,1958.

1956. Yu. F. Orlov, The non-linear theory of betatron oscillations in the strong-focusing synchrotron, 1. Nuovo Cimento **3**, 252-259 (1956).