Youri Alexandrovich Koubychine Merkulov

Associate professor
Campus Besós (UPC), Edifici C, Despatx C3.4
Av. Eduard Maristany, 16
08019 Barcelona

Telèfon: +34 934012543
E-Mail: iouri.koubychine

upc.edu
Web del grup de recerca: https://futur.upc.edu/NEMEN
Web personal: https://futur.upc.edu/180473

My current field of research is accelerator science with focus on beam dynamics (beam stability, resonant extraction, magnetic systems). In parallel I am working on a project of a compact accelerator of electrons of the race-track microtron (RTM) type with the maximal beam energy 12 MeV. This activity is carried out at the Laboratory of Particle Accelerators (https://inte.upc.edu/ca/serveis/laboratoris/microtro ) of the Institute of Energy Technologies (https://inte.upc.edu) at the Campus Diagonal-Besòs. The current tasks include development of the RTM control system, interlocks and safety system of the accelerating hall (bunker). The envisaged application of this accelerator is material irradiation.
I am teaching a few courses on the physics and applications of particle accelerators. I am a member of the Advisory Board of the Joint Universities Accelerator School.
Also I would like to add that till 2007 I was working on problems of the theory of fundamental interactions in the framework of the quantum field theory (perturbation methods, renormalization group, theories with extra dimensions of the space-time, applications of differential geometry methods), cosmology and astrophysics (multidimensional Universe, time evolution of the fundamental constants).

Short CV

2004 – present Associate professor, ENCORE group (from 2022), Department of Physics and Institute of Energy Technologies (INTE), Universitat Politècnica de Catalunya (UPC).
2001-2004 Visiting professor at the Department of Applied Mathematics IV, Universitat Politècnica de Catalunya.
2000-2001 Visiting professor at the Department of Physics of the University of Southampton (England).
2000 Degree of Doctor of Science (Habilitation), specialty: Theoretical and Mathematical Physics. Lomonosov Moscow State University (Russia).
1998-1999 Visiting professor at the Department of Physics of the University of Algarve (Portugal).
1992-1993 Visiting professor at the Department of the Matter Structure and Constituents, University of Barcelona.
1989 Postdoc fellowship at the Department of Theoretical Physics, Imperial College of Science and Technology (England)
1981-2001 Junior and Senior Researcher at the Department of High Energy Physics of the Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University (URSS and Russia).
1979-1983 Degree in Physics (specialty: Theoretical and Mathematical Physics), Lomonosov Moscow State University (URSS).

1- Racetrack Microtron—Pushing the Limits
Koubychine, Y.A.; Borisov, M.; Ermakov, A.; Khankin, V.; Shvedunov, V.
Symmetry-Basel 13, 2244:1-2244: 17 (2021)

2- CO oxidation on ceria studied by electrochemical impedance spectroscopy
Vendrell, X.; Koubychine, Y.A.; Mestres, L.; Llorca, J.
ChemCatChem 12, 5926-5931 (2020)

3- Stability of the phase motion in race-track microtrons
Koubychine, Y.A.; Barreto, O.; Ramirez, R.; Martinez-seara, M.
Physica. D, Nonlinear phenomena 349, 12-26 (2017)

4- End magnets with rare earth permanent magnet material for a compact race-track microtron
Vladimirov, I.; Pakhomov, N.; Shvedunov, V.; Koubychine, Y.A.; Rigla, J.; Zakharov, V.
European physical journal plus 129, 12 (2014)

5- Failure mode and effect analysis oriented to risk-reduction interventions in intraoperative electron radiation therapy: The specific impact of patient transportation, automation, and treatment planning availability
López-Tarjuelo, J.; Bouché-Babiloni, Ana; Santos-Serra, Agustín; Morillo-Macías, Virginia; Calvo, Felipe A.; Koubychine, Y.A.; Ferrer-Albiach, Carlos
Radiotherapy and oncology 113, 283-289 (2014)

6- Quadrupole lens and extraction magnets of a compact race-track microtron
Vladimirov, I.; Pakhomov, N.; Shvedunov, V.; Koubychine, Y.A.; Rigla, J.; Zakharov, V.
Moscow University Physics bulletin 69, 507-511 (2014)

7- Research opportunities in intraoperative radiation therapy: the next decade 2013–2023
Calvo, F.; Sole, C.; Gonzalez, M.; Tangco, E.; López-Tarjuelo, J.; Koubychine, Y.A.; Santos, J.; Pascau González-garzón, Javier; Herranz, R.; Ferrer-Albiach, Carlos
Clinical and translational oncology 15, 683-690 (2013)

8- "Electron gun with off-axis beam injection for a rece-track microtron"
Aloev, A.; Carrillo, D.; Koubychine, Y.A.; Pakhomov, N.; Shvedunov, V.
Nuclear instruments and methods A, 39-46 (2010)

9- "The accuracy of EGSnrc, Geant4 and PENELOPE Monte Carlo systems for the simulation of electron scatter in external beam radiotherapy"
Koubychine, Y.A.; Sempau, J.
Physics in medicine and biology 54, 6155-6163 (2009)

10- The accuracy of EGSnrc, Geant4 and PENELOPE Monte Carlo systems for the simulation of electron scatter in external beam radiotherapy
Faddegon, B.; Kawrakow, I.; Koubychine, Y.A.; Perl, J.; Sempau, J.; Urban, L.
Physics in medicine and biology 54, 20 (2009)

11- "Particle accelerators, a great endeavor of the last 80 years"
Koubychine, Y.A.
INTE news , 4-4 (2009)

12- Longitudinal beam dynamics with phase slip in race-track microtron
Koubychine, Y.A.; Poseryaev, A.; Shvedunov, V.
Nuclear instruments and methods 596, 147-156 (2008)

13- "An IORT-dedicated mobile racetrack microtron en "Abstracts of the International Society of Intraoperative Radiation Therapy""
Escude, L.; Calvo, F.; Eraso, A.; Gutierrez, C.; Guedea, F.; Koubychine, Y.A.; Shvedunov, V.
Revisiones en cáncer 22, 5-6 (2008)

14- Astronomical measurements and constraints on the variability of fundamental constants
Garcia-berro, E.; Isern, J.; Koubychine, Y.A.
Astronomy and astrophysics review 14, 113-170 (2007)

15- Equipo para radioterapia intraoperatoria basado en un microtrón de pista de 12 MeV
Ferrer, M.; Koubychine, Y.A.; Poseryaev, A.; Rigla, J.; Roure, F.; Shvedunov, V.
Revista de física médica 8, 86-87 (2007)

16- "The variation of the gravitational constant inferred from the Hubble diagram of Type Ia supernovae"
Garcia-berro, E.; Koubychine, Y.A.; Loren, P.; Isern, J.
International journal of modern physics D 15, 1163-1174 (2006)

17- "Time variation of G and alpha within models of extra dimensions"
Loren, P.; Garcia-berro, E.; Isern, J.; Koubychine, Y.A.
Classical and quantum gravity 20, 3563-3574 (2003)

18- El sincrotró del Vallès, un present i un futur esperançador per a la UPC
Koubychine, Y.A.
Informacions , 10-10 (2003)

19- "ERG as a tool for non-perturbatives studies"
Koubychine, Y.A.
Acta physica slovaca 52, 603-614 (2002)

20- "Solutions to the Polchinski ERG equation in the O(N) scalar model"
Koubychine, Y.A.; Neves, R.; Potting, R.
International journal of modern physics A 17, 4871-4902 (2002)

21- "Effective Lagrangians for physical degrees of freedom in the Randall-Sundrum model"
Boos, E.; Koubychine, Y.A.; Smolyakov, M.; Volobuev, I.P.
Classical and quantum gravity 19, 4591-4606 (2002)

22- "Gauge invariant regularization via SU(N|N)"
Arnone, S.; Koubychine, Y.A.; Morris, T. R.; Tighe, J. F.
International journal of modern physics A 17, 2283-2329 (2002)

23- "Effective Potential and KK-renormalization scheme in a 5D supersymmetric theory"
Di Clemente, V.; Koubychine, Y.A.
Nuclear physics B B636, 115-131 (2002)

24- "Instanton propagator and instanton induced processes in scalar model -5007"
Koubychine, Y.A.; Tinyakov, P. G.
Physical review. D, Particles, fields, gravitation, and cosmology 65, 08 (2002)

25- "Effective Lagrangians of the Randall-Sundrum Model"
Boos, E. E.; Volobuev, I.; Koubychine, Y.A.; Smolyakov, M. N.
Theoretical and mathematical physics 131, 629-640 (2002)

26- "A gauge invariant regulator for the ERG"
Arnone, S.; Koubychine, Y.A.; Morris, T.; Tighe, J.
International journal of modern physics A A16, 1989-2001 (2001)

27- "Polchinski ERG equation in O(N) scalar field theory"
Koubychine, Y.A.; Neves, R.; Potting, R.
International journal of modern physics A 16, 2065-2070 (2001)

28- "Calculation of Wilson loops in 2-dimensional Yang-Mills theories"
Aroca, J.; Koubychine, Y.A.
Annals of physics 283, 11-56 (2000)

29- "Exact renormalization group approach in scalar and fermionic theories"
Koubychine, Y.A.
International journal of modern physics B , 1321-1341 (1998)

30- Amplification of the scattering cross section due to non-trivial topology of the spacetime
Kirsten, K.; Koubychine, Y.A.
Zeitschrift für Physik C. Particles and fields 76, 363-374 (1997)

31- On the instability of the vacuum in multidimensional scalar theories
Elizalde, E.; Kirsten, K.; Koubychine, Y.A.
Zeitschrift für Physik C. Particles and fields 70, 159-172 (1996)

32- Possible evidence of Kaluza-Klein particles in a scalar model with spherical compactification
Elizalde, E.; Koubychine, Y.A.
Journal of physics A. Mathematical and general 27, 7533-7553 (1994)

33- Manifestations of space-time multidimensionality in scattering of scalar particles
Demichev, A.; Koubychine, Y.A.; Pérez , J.
Physics letters B 323, 139-146 (1994)

34- Gradient flows from an approximation to the exact renormalization group
Haagensen, P.; Koubychine, Y.A.; Latorre, J.; Moreno-Ostos, E.
Physics letters B 323, 330-338 (1994)

35- Invariant connections with torsion on group manifolds and their application in Kaluza–Klein theories
Koubychine, Y.A.; Malyshev, O.B.; Marín , D.
Journal of mathematical physics 35, 310-320 (1994)

36- Invariant connections on homogeneous spaces
Koubychine, Y.A.; Richter, O.; Rudolph, G.
Journal of mathematical physics 34, 5268-5282 (1993)

37- Stability of compactification in Einstein-Yang-Mills theories after inflation
Bertolami, O.; Koubychine, Y.A.; Mouräo, J.
Physical review D. Particles and fields 45, 3405-3414 (1992)

38- AN OPERATOR REGULARIZATION FOR CHIRAL GAUGE THEORIES
Koubychine, Y.A.; Soto, J.
International journal of modern physics A 06, 3807-3822 (1991)

39- Higgs potentials from multidimensional Yang-Mills theories
Koubychine, Y.A.
Journal of mathematical physics 32, 2200-2209 (1991)

40- Quantum norm theory and the quantisation of metric topology
Isham, C.; Koubychine, Y.A.; Renteln, P.
Classical and quantum gravity 7, 1053-1074 (1990)

41- Multidimensional Einstein-Yang-Mills theories: Dimensional reduction, spontaneous compactification, and all that
Koubychine, Y.A.; Mouräo, J.; Volobuev, I.P.
Nuclear physics B 322, 531-554 (1989)

42- Dynamics of compactification in Einstein-yang-mills theories
Koubychine, Y.A.; Rubakov, V.; Tkachev, I.
International journal of modern physics A 04, 1409-1425 (1989)

43- "Symmetric spaces and Higgs models in the method of dimensional reduction. II. Theories with one multiplet of scalar fields"
Volobuev, I.P.; Koubychine, Y.A.; Mouräo, J.
Theoretical and mathematical physics 78, 191-200 (1989)

44- "Symmetric spaces and Higgs models in the method of dimensional reduction. I. Potentials of the scalar fields of the reduced theory"
Volobuev, I.P.; Koubychine, Y.A.; Mouräo, J.
Theoretical and mathematical physics 78, 41-49 (1989)

45- "Scalar fields in the dimensional reduction scheme for symmetric spaces"
Koubychine, Y.A.; Mouräo, J.; Volobuev, I.P.
International journal of modern physics A 04, 151-171 (1989)

46- "Spontaneous compactification from the point of view of dimensional reduction of gauge fields"
Volobuev, I.P.; Koubychine, Y.A.
Theoretical and mathematical physics 75, 509-517 (1988)

47- "Spontaneous compactification and dimensional reduction"
Koubychine, Y.A.; Mouräo, J.; Volobuev, I.P.
Physics letters B 203, 349-352 (1988)

48- "Higgs potentials as inheritance from higher space-time dimensions. II. Construction of Higgs models"
Volobuev, I.P.; Koubychine, Y.A.
Theoretical and mathematical physics 68, 885-893 (1986)

49- "Higgs potentials as inheritance from higher space-time dimensions I. Dimensional reduction and scalar fields"
Volobuev, I.P.; Koubychine, Y.A.
Theoretical and mathematical physics 68, 788-796 (1986)

50- "Sommerfeld-Watson summation of perturbation series"
Koubychine, Y.A.
Theoretical and mathematical physics 58, 91-97 (1984)

51- "Corrections to the asymptotic expressions for the higher orders of perturbation theory"
Koubychine, Y.A.
Theoretical and mathematical physics 57, 1196-1202 (1983)

52- Four-loop approximation in the phi-4 model
Koubychine, Y.A.; Tarasov, O.; Dittes, F.
Theoretical and mathematical physics 37, 879-884 (1978)