RNDr. Pavol UŠÁK, CSs.


Ušák, P. and Mozola, P.: How to speed up Y–Ba–Cu–O tape recovery. IEEE Trans. Applied Supercond. 23 (2013) 4701011.


UšákP.: Errors in measurement of current distribution in a superconducting tape, Supercond. Sci Technol. 24 (2011) 045007.


UšákP., Polák, M., and Mozola, P.: Measurement of the lateral transport current distribution in YBCO tape, IEEE Trans. Applied Supercond. 19 (2009) 2839-2842.


UšákP., Polák, M., Kvitkovič, J., Mozola, P., Barnes, P.N., and Levin, G.A.: Current distribution in the winding of a superconducting coil, IEEE Trans. Applied Supercond. 18 (2008) 1597-1600.

Polák, M., Barnes, P.N., Kvitkovič, J., Levin, G.A., Mozola, P., and UšákP.: Properties of an experimental coil wound with YBCO coated conductor carrying an AC current with frequencies up to 864 Hz, IEEE Trans. Applied Supercond. 18 (2008) 1240-1244.


UšákP., Polák, M., Demenčík, E., Kvitkovič, J., Levin, G.A., and Barnes, P.N.: The current distribution in a striated YBCO tape subjected to both a magnetization and a transport current, Supercond. Sci Technol. 20 (2007) 994-1001.

UšákP., Polák, M., and Demenčík, E.: Current distribution in thermally degraded superconductor of 2nd generation, Physica C 455 (2007) 67-70.

Demenčík, E., UšákP., Takács, S., Vávra, I., Polák, M., Levin, G.A., and Barnes, P.N.: Visualization of coupling current paths in striated YBCO-coated conductors at frequencies up to 400 Hz, Supercond. Sci Technol. 20 (2007) 87-91.

Demenčík, E., UšákP., and Polák, M.: Hall probe based system for study of AC transport current distribution in YBCO coated conductors at frequencies up to 700Hz, IEEE Trans. Applied Supercond. 17 (2007) 3175-3178.


UšákP., Sastry, P.V.P.S.S., and Schwartz, J.: Model inverse calculation of current distributions in the cross-section of a superconducting cable, Physica C 434 (2006) 1-5.

UšákP.: Dependence of the recovery current of multifilamentary NbTi superconductors on matrix purity, Supercond. Sci Technol. 19 (2006) 22-26.

UšákP.: The change in tape current distribution during gradual current ramping up over Ic and down to zero, J. Phys.: Conf. Ser. 43 (2006) 55-58.

Polák, M., UšákP., and Demenčík, E.: The distribution of magnetization and transport currents in DyBCO tape, Physica C 440 (2006) 40-44.

Demenčík, E., UšákP., Polák, M., Piel, H., and Dhalle, M.: Lateral critical current distribution and self-field profile of Bi-2223/Ag conductors: measurements and calculations, Supercond. Sci Technol. 19 (2006) 848-853.

Mozola, P., UšákP., Ryzá, J., and Polák, M.: Thermal conductivity in a sample simulating the winding structure of Bi-2223/Ag epoxy impregnated coils, J. Phys.: Conf. Ser. 43 (2006) 75-78.


Chovanec, F. and UšákP.: Temperature oscillations in thin metallic tapes with transport current at liquid nitrogen temperature, Cryogenics 45 (2005) 129-133.


Sastry, P.V.P.S., Nguyen, D.N., UšákP., and Schwartz, J.: Verification of thermal interpretation of BSCCO-2223/Ag current-volatge hysteresis, Supercond. Sci Techn. 17(2004) 314-319.


UšákP.: The measurements of current distribution in superconducting tape. Comparison of destructive and non-descructive methods, Physica C 384 (2003) 93-101.

UšákP.: Random instabilities of current-voltage curves of BSCCO-2223/Ag multifilamentary tapes in LN2 at 77K, Supercond. Sci & Technology 16 (2003) 459-463.

Jelinek, Z., Timoransky, Z., Zizek, F., Piel, H., Polak, M., Chovanec, F., Mozola, P., Janšák, L., Kvitkovič, J. and Ušák, P.: Test results of 14 kVA superconducting transformer with Bi-2223/Ag windings, IEEE Trans. on Applied Supercond. 13 (2003) 2310.

Hense, K., Kirchmayr, H., Kováč, P., Lackner, R., Müller, M., Pachla, W., Pitel, J., Polák, M., and UšákP.: Preparation and characterization of Bi-2223 tapes, Physica C 392-396 (2003) 1007-1010.


Chovanec, F. and UšákP.: Instabilities above critical current region in Bi-2223/Ag superconducting coils cooled by liquid nitrogen, Cryogenics 42 (2002) 543-546.

Polák, M., UšákP., Janšák, L., Kvitkovič, J., Timoranský, Z., and Žižek, F.: Effect of ferromagnetic rings on critical current and AC losses of a coil made from Bi-2223/Ag tape, IEEE Trans. on Applied Supercond. 12 (2002) 1632-1634.

Chovanec, F., Jahn, P., Janšák, L., Jelinek, J., Kvitkovič, J., Mozola, P., Piel, H., Polák, M., Timoranský, Z., UšákP., and Žižek, F.: 15kVA superconducting transformer. In: 7th Int. Conf. Cryogenics 2002. Praha 2002. P. 46-48.


UšákP., Janšák, L., and Polák, M.: Hysteresis of V-I curve of BSCCO-2223 tape, Physica C 350 (2001) 139-146.

Polák, M., UšákP., Pitel, J., Janšák, L., Timoranský, Z., Žižek, F., and Piel, H.: Comparison of solenoidal and pancake model windings for a superconducting transformer, IEEE Trans. on Applied Supercond. 11 (2001) 1478-1481.


Polak, M., Jansak, L., Kvitkovic, J., UsakP., Paasi, J., Lehtonen, J., Daumling, M., Kasztler, A., Kirchmayr, and H.: Effect of interturn spacing on ACloss of single layer Bi-2223/Ag coils, IEEE Trans. on Applied Supercond. 10 (2000) 673-676.

UšákP., Janšák, L., and Polák, M.: BSCCO(2223)/Ag multifilamentary tape in inclined external magnetic field. In: Cryogenics 2000. Ed.: V.Chrz. Prague, ICARIS 2000. P. 60-63.


UšákP.: Measurement of the transport current distribution in a superconducting tape, Physica C 316 (1999) 229-233.


UšákP., Janšák, L., and Chovanec, F.: Local nature of transport properties of Ag-sheathed BSCCO (Bi-2223) superconducting tapes. In: Proc. 5th Int. Conf. Cryogenics 98. Prague 1998. P. 108.


UšákP., Chovanec, F.: Measurement of current density distribution in high TcAg-sheathed superconducting tapes, IEEE Trans. on Applied Supercond. (1997) 1343.


UšákP., and Chovanec, F.: The dynamics of current density distribution in Ag-sheathed TBCCO tape in changing gradient field, IEEE Trans. on Magnetics 32 (1996) 2818-2821.

UšákP., Janšák, L., and Chovanec, F.: Anisotropy of E(j) characteristics of Ag-sheathed BSCCO tapes with respect to external magnetic field, Applied Superconductivity (1996) 577. (Printed in 1997).

UšákP. and Chovanec, F.: Influence of gradient magnetic field on current redistribution in Ag-sheathed TBCCO tape. In: Cryogenics 96. Proc. of the 4th Inter. Conf. Praha 1996. P. 97-100.

Chovanec, F., UšákP., and Kokavec, J.: Electromagnetic properties of Tl-Ba-Ca-Cu-O (Tl-2212) superconducting tapes and films. In: Cryogenics 96. Proc. of the 4th Inter. Conf. Praha, 1996. P. 24-27.


Chovanec, F., Janšák, L., Kottman, P., Majoroš, M., UšákP., Suchoň, D., and Jergel, M.: Critical current anisotropy of Ag-sheathed 2212 TlBaCaCuO superconducting tapes, IOP 148 (1995) 475.

UšákP.: Computer controlled sequential measurement of the Nb/Ti superconductor recovery behaviour. In: The 3rd Japanese-Czech-Slovak Joint Seminar on Applied Electromagnetics. Praha, CTU 1995. P. 190-193.


Chovanec, F., UšákP., Kokavec, J., and Sidorov, M.: Quench behaviour of adiabatic NbTi superconducting winding under controlled stress, Cryogenics 34 (1994) S521.

Kokavec, J., UšákP., Krempaský, L., and Chovanec, F.: Precise determination of superconducting magnet axis, Cryogenics 34 (1994) S681.

UšákP.: Indirect measurement of NbTi wire temperature field response to local heat input, Cryogenics 34 (1994) S531.

UšákP.: Superconductings tape cross section j fied dynamics as an inverse problem for self field mapping, J. of the Japan Society of Appl. Electromagnetics Suppl. (1994) 25.

UšákP., Chovanec, F., and Kokavec, J.: Measurement by resistive strain gauges in strong magnetic fields at liquid helium temperature, J. of the Japan Society of Appl. Electromagnetics Suppl. (1994) 265.

UšákP.: Indirect measurement of T(x) profile of locally heated NbTi wire. In: Kryogenika 94. Ústí n. Labem 1994. P. 143.

UšákP.: Simple way to measurr Ic(B,T) critical surface of NbTi superconducting wire. In: Kryogenika 94. Ústí n. Labem 1994. P. 140.

Chovanec, F. and UšákP.: Improvement of the superconducting magnetic system stability. In: Kryogenika 94. Ústí n. Labem 1994. P. 118.

UšákP. and Chovanec, F.: Application limits for low and high Tc superconductors from stand point of mechanical stability. In: Proc. of the Japan-Central Europe Joint Workshop on Advanced Computing in Engn. Ed. M. Akiyama. Varšava 1994. P. 317-323.


UšákP., Kokavec, J., Chovanec, F., Krempaský, L., and Gregor, B.: B.: Safety and protection of 8T NbTi gyrotron magnet in persistent mode, IEEE Trans. on Magnetics 29 (1993) 2238.


Chovanec, F., UšákP., Kokavec, J., and Krempaský, L.: Influence of construction concepts on training behaviour of gyrotron magnets, Cryogenics 32 (1992) 394.

UšákP., Chovanec, F., Hanečka, B., Kokavec, J., and Krempaský, L.: The designe of stable race track superconducting switch, Cryogenics 32 (1992) 466.

UšákP., Kokavec, J., Chovanec, F., Krempaský, L., and Gregor, B.: Experience with operational and quench behaviour of large 8T gyrotron magnet. In: Cryogenics 92. Brno, ČS VTS 1992. P. 141.

UšákP. and Kokavec, J.: Low temperature behaviour of commercially availlable high current silicon diodes. In: Cryogenics 92. Brno, ČS VTS 1992. P. 138.


UšákP. and Kokavec, J.: Application of tensometers in measurements of ponderomotive deformation of superconducting magnet. In: Proc. 4th Symposium on „Sensors and sensor systems“ at Technical University Košice. Sensor Prešov 1991. P. 51.

Chovanec, F., Kokavec, J., Krempaský, L., UšákP., Gregor, B., and Pitel, J.: Gyrotron superconducting magnet systems for ITER program. In: Proc. 2nd Czechoslovak-Italian Symp. on Superconductivity. Bratislava, Veda 1991. P. 160.

UšákP., Kokavec, J., Chovanec, F., Krempaský, L., and Gregor, B.: The gyrotron magnets overheating and dynamics of heat input helium base after the quench. In: Proc. 2nd Czechoslovak-Italian Symp. on Supercond. Bratislava, Veda 1991. P. 167.

UšákP.: Instabilities of superconductor winding in the race track superconducting switch. In: Proc. of the Int. Symposium on AC Superconductors. Bratislava, IEE SAS 1991. P. 143.


Karasik, V.R., Vysotsky, V.S., Kleshnina, O.A., Deryagin, S.G., Levin, S.M., Malgynov, V.A., Svietsky, A.P., Chovanec, F., Kokavec, J., Krempaský, L., UšákP., and Gregor, B.: High current density superconducting magnet for gyrotron. In: 11th Int. Conf. on Magnet Technology. Eds. T. Sekugichi, S. Shimamoto. London, Elsevier Appl. Sci 1990. P. 1286-1290.

UšákP., Kokavec, J., Krempaský, L., Chovanec, F., and Gregor, B.: Mechanical instabilities and training behaviour of superconducting magnets for gyrotrons. In: Kryogenika 90. Košice, DT ČSVTS 1990. P. 135.


UšákP. a Kleshnina, O.A.: Povyšenije mechaničeskoj ustojčivosti sverchprovodaščich NbTi obmotok solenoidalnovo tipa na osnove optimizacionnovo rasčota konstrukcionnych parametrov. In: Naučno-techničeskij seminar o kriogennej technike. Plzeň 1989. P. 104-112.


Chovanec, F., Kokavec, J., Krempaský, L., UšákP., Polák, M. a Janšák, L.: Kryomagnetické systémy pre ohrev plazmy v zariadeniach typu TOKAMAK. In: Kryogenika ’88. Ústí n. Labem, Dům techniky ČSVTS 1988. S.63.

Kollár, L., UšákP., Kokavec, J., Hasenöhrl, S. a Morvic, M.: Meranie parametrov Hallových sond na báze GaAs, Elektrotechn. časopis 39 (1988) 912.

Polák, M., Hlásnik, I., Chovanec, F., Kedrová, M., Kottman, P., Krempaský, L., Majoroš, M., Talapa, J., UšákP. a Vencel, L.: K meraniu kritickej teploty a kritického prúdu vysokoteplotných supravodičov YBaCuO, Elektrotechn. časopis 39 (1988) 231.


UšákP.: Degradácia supravodivého vinutia z hľadiska stability, Transformátory 67 (1987).


Chovanec, F., Kokavec, J., Krempaský, L., Janák, L., a UšákP.: Sverchprovodjaščije magnitnyje sistemy dlja SVC kompelksa nagreva plazmy v ustanovke Tokamak T-15. In: Trudy 1. meždunar. symposiuma po fiziko-techničeskim problemam ispoľzovanija sverchprovodimosti v energetike. Bratislava, EÚ CEFV SAV 1986. P. 75.

UšákP.: Výpočet závislosti rekuperačného prúdu mnohovláknitých NbTi supravodičov od čistoty matrice a od kritickej teploty, Elektrotechn. časopis 37 (1986) 489.


UšákP.: Meranie teplotnej inercie odporov Allen-Bradley pomocou VA charakteristík. In: Kryogenika 84. Bratislava, EÚ CEFV SAV 1984. S.98.


UšákP. a Jastrebská, T.: Meranie vlastného poľa supravodivej pásky z Nb3Sn, Elektrotechn. časopis 32 (1981) 676.


Polák, M., UšákP. a Štofanik, F.: Zvýšenie linearity nízkoteplotných Hallových sond, Elektrotechn. časopis 31 (1980) 325.


UšákP.: Referát o vlastnostiach Hallových sond vyrábaných na EÚ SAV. In: Doklady sovmestnoj roboty. Wroclaw, Inst. Niz. Temperatur i badan strukturalnych PAN 1979. P. 89.