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Union of the Physicists in Bulgaria
Memoirs

Created 10.12.2015
Updated 7.7.2022

Biography
Vesselin Tassev Kovachev
(16.07.1940 – 23.11.2015)

Documents

Born in Kunino Vilage, Vratsa District

Education

He gradueted from the Technological Institute of Saint Petersburg (1952)

Became Ph.D. (1970) and Sc.D. (01.04.1986)

Research

Low temperature physics is the area of his research. He investigated superconductivity properties and materials in the Institute of Solid State Physics – BAS

He was a guest researcher in Japan and USA–Brookhaven National Laboratory (1984–1990), and Texas Superconducting Super Collider (1990–1996)

In Japan, Veselin Kovachev was a guest professor in the National Laboratory for High Energy Physics and the National Institute for Fusion Science

Professional experience

Elected fo Associate Professor (1977)

He was deputy director of the Institute of Solid State Physics (1978–1988)

Veselin Kovachev was creator and head of the Laboratory for supperconductivity and super conducting materials in the Institute of Solid State Physics - BAS (1988–2003)

V. Kovachev was member of the Scientific Councel of the International Laboratory of High Magnetic Fields and Low Temperature in Wroclaw, Poland and headed Scientific Councel of the Institute of Solid State Physics

Publications

V. Kovachev was co-autor of 5 books, 150 scientific paper and 9 patents

  1. T. Nakamoto, T. Shintomi, A. Yamamoto, Y. Doi, T. Haruyama, N. Higashi, M. Iida, H. Kawamata, N. Kimura, V. Kovachev, Y. Makida, H. Ohhata, N. Ohuchi, T. Ogitsu, S. Sugawara, K. Tanaka, A. Terashima, K. Tsuchiya, Development of a 56 mm Aperture Superconducting Dipole Model Magnet for LHC, IEEE Trans on Appl. Super, 9(2) p. 1106 (2005)

  2. V. Kovachev, Application problems of high-current superconducting materials, Journal of materials science, Materials in electronics, 14, 665-669 (2003) - 3 бр.

  3. V. Kovachev, Application problems of high-current superconducting materials, Proceedings of 12 ISCMP (2002) p. 665-670

  4. V. Kovachev, E. Nazarova, V. Lovchinov, E. Vlakhov, B. Terzijska, D. Dimitrov, N. Balchev, Superconductivity and Superconducting Materials Laboratory, Jubilee Collection 30-th Anniversary of the Institute of Solid State Physics 1972-2002, ed. A. G. Petrov, p. 125 (2002)

  5. A. Yamamoto, V. Kovachev, Development of a superconducting quadrupole model magnet for the Large Hadron Collider, Proceedings of Fifteenth International Conference on Magnet Technology, Part One, MT-15 Proceedings, Editors Lin Liangzhen, Shen Guoliao, Yan Luguang, Science Press, Beijing, China, 20-24 October 1997, p. 55-58

  6. T. Nakamoto, V. Kovachev, Development of 56 mm apperture superconducting dipole model magnet for LHC, Proceedings of Fifteenth International Conference on Magnet Technology, Part One, MT-15 Proceedings, Editors Lin Liangzhen, Shen Guoliao, Yan Luguang, Science Press, Beijing, China, 20-24 October 1997, p. 59-62

  7. N. Kimura, V. Kovachev, A. Yamamoto and all, Improved heat transfer for Rutherford-tipe insulated cables in pressurized HeII, Proceedings of Fifteenth International Conference on Magnet Technology, Part One, MT-15 Proceedings, Editors Lin Liangzhen, Shen Guoliao, Yan Luguang, Science Press, Beijing, China, 20-24 October 1997, OEI-5

  8. T. Ogitsu, A. Devred, V. Kovachev, Influence of inter-strand coupling current on field quality of superconducting accelerator magnets. Particle Accelerator (57) 215-235 (1997)

  9. W. Car, V. Kovachev, Interstrand Eddy Current Losses in SSC Magnets, Cryogenics, v. 35(8) p. 529 (1995)

  10. G. Snitchler, D. Capone, V. Kovachev, R. Schermer, Heat generation and cooling of SSC magnets at high ramp rates, Proceedings of ICFA workshop on AC superconductivity, 23-25 June 1992, Tsukuba, Japan, 15-18

  11. R. Jaykumar, V. Kovachev, D. Orrell, G. Snitchler, AC Losses in the SSC High Energy Booster Dipole Magnets, IEEE Trans on Mag., v. 28(1) p. 148 (1992)

  12. V. Kovatchev, Dissipation in Superconducting Materials, Oxford Science Publications, Clarendon Press (1991)

  13. E. Vlakhov, K. Nenkov, Y. Dimitriev, V. Kovachev: Influence of Ag Additions on Superconducting Transition of R Ba2 Cu3 O7-x (R = Y, Eu) Ceramics in Magnetic Field, Physica C, v. 162-64, pt.2, 975 (1989)

  14. A. Gurevich, V. Kovachev, Physics Stat. Solidi (b) 145(4-5) 601-613 (1988)

  15. M. Borissov, O. Ivanov, V. Kovachev, V. Lovchinov, Transverse acoustoelectric effect in piezoelectric configuration - metal conductive sample, Acoustics Letters, v. 11(12) 229-232 (1988)

  16. V. Kovachev, E. Vlakhov, K. Nenkov, V. Lovchinov, M. Gospodinov, A. Stojanova, D. Dimitrov, T. Mydlarz: Antiferromagnetic Ordering in Y-Ba-Cu-Pt-O, Inter. J. Modern Phys. B, 1, 2, 479 (1987)

  17. V. Kovachev, E. Vlakhov, K. Nenkov, V. Lovchinov, M. Gospodinov, A. Stojanov, D. Dimitrov, Superconducting Properties of Y-Ba-Cu-Pt-O, International Journal of Modern Physics B, v. 1(2) 223-229 (1987)

  18. V. Kovachev, V. Lovchinov, K. Nenkov, E. Nazarova, M. Bichkova, A. Korjov: AC Losses of NbN, Phys. Stat. Sol. (a), 91, K151 (1985)

  19. V. Kovachev, D. Dew-Hughes, AC Losses of V2Hf, Proceed. ICEC 10, July 31- August 3 1984, Helsinki, “Butterworths”, Surrey, 708 (1984)

  20. V. Kovachev, K. Nenkov: Power Losses of Nb3Ge-clad Tapes in Superposed AC and DC Magnetic Fields, Materials Lett., 2, 2, 111 (1983)

  21. V. Kovachev, E. Nazarova: Minimum in AC Losses of Low Bulk Pinning Nb3Sn, Phys. Stat. Sol. (a), 71, 357 (1982)

  22. V. Kovachev, E. Nazarova, Minima of Power Losses of Nb3Sn in superposed AC and DC Magnetic Fields, Proceed. ICMC 9, Kobe, Japan, 1982, “Butterworths”, Surrey, 162 (1982)

  23. V. Kovachev, Temperature Dependence of the Minimum in AC Power Losses of (NB0,99Zr0,01)3Sn in Parallel AC and DC Magnetic Fields, Journal of Applied Physics, v. 51, Nr. 7, p. 3812-3815 (1980)

  24. J. Bussiere, V. Kovachev, AC Losses of Bronze-Processed (NB1-xZrx)3Sn between 5 and 16 K, Journal of Applied Physics, v. 50, Nr. 5, p. 3510-3513 (1979)

  25. V. Kovachev, E. Vlahov, K. Nenkov, Heat Transfer in Bolling Neon in Vertical Capillaries, Cryogenics, v. 16, Nr. 4, p. 431-436 (1976)

  26. E. Leyarovski, V. Kovachev, E. Vlahov, K. Trojnar, Studies on the heat transfer in bitter tipe solenoids cooled by cryogenic liquids, Preprint 32, MLSMFLT, Wroclaw (1976)

  27. E. Leyarovski, V. Kovachev, E. Vlahov, K. Nenkov, Critical Heat flow at Forced convection of liquid nitrogen in narrow channels, Preprint 27, MLSMFL, Wroclaw (1976)

  28. E. Leyarovski, V. Kovachev, V. Lovchinov, E. Vlahov, Magnetoresistance of pure polycrystal Al under strong magnetic field, Доклади на БАН, т. 29, с. 803 (1976)

  29. C. Roumenin, V. Kovachev, Magnetism alloyed in n-InSb, Доклади на БАН, т. 29, с. 779 (1976)

  30. C. Roumenin, V. Kovachev, Peculiarities of Magnetoresistance in n-InSb, Доклади на БАН, т. 29, с. 331 (1976)

  31. J. Georgiev, V. Kovachev, Thermodinamical irreversibility of two-stage stirling type cryogenerators, Доклади на БАН, т. 29, с. 41 (1976)

  32. I. Danilov, V. Kovachev, A two-stage Helium expander, Review of modern cryogenics, Moscow, p. 274 (1975)

  33. V. Kovachev, Thermodinamical irreversibility of stirling type cryogenerators, Доклади на БАН, т. 28, с. 1335 (1975)

  34. J. Georgiev, V. Kovachev, Multichannel low temperature heat exchanger, Cryogenics, 1, p. 25 (1974)

  35. I. Danilov, V. Kovachev, Influence of the Non-workings space on the efficiency of Helium piston expander, Бюлетин на Физическия институт, БАН, т. 23, с. 55 (1973)

  36. E. Leyarovski, B. Nicolov, V. Kovachev, K. Nenkov, Cooling efficiency of solenoids with free boiling liquid Nitrogen, Preprint 14 of the International Laboratory for Strong Magnetic Field and Low Temperature, (ILSMFLT), Wroclaw, 1973

  37. I. Danilov, V. Kovachev, Optimization of Helium refrigerating cycles with cascade series of expanders, Булетин на Физическия институт, БАН, т. 23, с. 135 (1973)

  38. V. Kovachev. Efficiency of a Cryogenic Cascade Series of Heat Pumps Cryogenics, 13, p. 487 (1973)

  39. I. Danilov, V. Kovachev, A two-stage expandion engine with differential piston, Proceedings of the 4th ICEC, Eindhoven, p. 87 (1972)

  40. I. Danilov, V. Kovachev, Optimization of two-stage expansion in Helium Refrigerators, Доклади на БАН, т. 24, с. 179 (1971)

  41. V. Kovachev, Closed Helium Refrigerator with two-stage expansion engine, Ph.D. Tehesis, Institute for Physical Problems, Moscow (1970)

  42. E. Leyarovski, V. Kovachev, Three flow low temperature heat exchanger, Cryogenics, 10, p. 337 (1969)

  43. V. Kovachev, Closed Helium Refrigerator cycles, Buletin of Refrigerating Technique, Sofia, 3-4, 23 (1969)

  44. B. Bonev, V. Kovachev, M. Goland, A new technique for determination of heat capacity and heat conductivity of insulation materials, Reports of the Institute of Refrigeration Technology, Leningrad, v. 12, p. 19 (1963)

  45. V. Kovachev, E. Vlakhov, High magnetic field studies of high temperature superconductors in Studies of high temperature superconductors, ed. By A. Narlikar, v.4, p.59

References

  1. Проф. дфн Веселин Тасев Ковачев, Светът на физиката, бр. 2, с. 202 (2015)

  2. Некролог от Института по физика на твърдото тяло - БАН

  3. Трети национален конгрес по физически науки – в бр. 5 (2016) на сп. „Наука“ на Съюза на учението в България

  4. Веселин Тасев Ковачев – Вестник Международной академии холода, 2015, №4(57), стр. 31

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