Lubomír KOPERA

  • 2019

Kopera, L., Kováč, P., Kováč, J., Melišek, T., Hušek, I., and Berek, D.: Small diameter wind and react coil made of anodised Al-sheathed MgB2 wire, Supercond. Sci Technol. 32 (2019) 105003.

Santra, S., Grovenor, C.R.M., Speller, S.C., Kováč, P., Kopera, L., and Hušek, I.: Comparison of interfacial and critical current behaviour of Al+Al2O3 sheathed MgB2 wires with Ta and Tidiffusion barriers, J. Alloys Comp. 807 (2019) 151665.

Búran, M., Vojenčiak, M., Mošať, M., Ghabeli, A., Solovyov, M., Pekarčíková, M., Kopera, Ľ., and Gömöry, F.: Impact of a REBCO coated conductor stabilization layer on the fault current limiting functionality, Supercond. Sci Technol. 32 (2019) 095008.

Kováč, P., Kopera, L., Kováč, J., Melišek, T., Haessler, W., Wang, D., and Ma, Y.: Current densities and strain tolerances of filamentary MgB2 wires made by an internal Mg diffusion process, Supercond. Sci Technol. 32 (2019) 095006.

Kováč, P., Hušek, I., Rosová, A., Melišek, T., Kováč, J., Kopera, L., Scheiter, J., and Haessler, W.: Strong no-barrier SS sheathed MgB2 composite wire, Physica C 560 (2019) 40-44.

  • 2018

Kováč, J., Kulich, M., Kopera, L., and Kováč, P.: AC losses of Rutherford MgB2 cables made by powder-in-tube and internal magnesium diffusion processes, Supercond. Sci Technol. 31 (2018) 125014.

Kováč, P., Hušek, I., Kulich, M., Kováč, J., Melišek, T., Kopera, L., and Pachla, W.: Multi-core MgB2 wire with a Ti barrier and a reinforced Al+Al2O3 sheath, Supercond. Sci Technol. 31 (2018) 095006.

Kováč, P., Hušek, I., Rosová, A., Kulich, M., Kováč, J., Melišek, T., Kopera, L., Balog, M., and Krížik, P.: Ultra-lightweight superconducting wire based on Mg, B, Ti and Al, Sci Reports 8 (2018) 11229.

Balog, M., Rosová, A., Szundiová, B., Orovčík, Ľ., Krížik, P., Švec, P.Jr., Kulich, M., Kopera, L., Kováč, P., Hušek, I., and Ibrahim, A.M.H.: HITEMAL-an outer sheath material for MgB2 superconductor wires: The effect of annealing at 595–655 °C on the microstructure and properties, Mater. Design 157 (2018) 12–23.

Kováč, P., Hušek, I., Kulich, M., Kováč, J., Melišek, T., Kopera, L., Perez, N., Haessler, W., Balog, M., Krížik, P., and Berek, D.: Lightweight MgB2 wires with a high temperature aluminum sheath made of variable purity Al powder and Al2O3 content, Supercond. Sci Technol. 31 (2018) 085003. (APVV 14-0522, VEGA 2/0025/14)

Rosová, A., Hušek, I., Kulich, M., Melišek, T., Kováč, P., Dobročka, E., Kopera, L., Scheiter, J., and Haessler, W.: Microstructure of undoped and C-doped MgB2 wires prepared by an internal magnesium diffusion technique using different B powders, J. Alloys Comp. 764 (2018) 437e445.

Kováč, P., Kopera, L., Kováč, J., Hain, M., Melišek, T., Kulich, M., and Hušek, I.: Rutherford cable made of internal magnesium diffusion MgB2 wires sheathed with Al-Al2O3 particulate metal matrix composite, Supercond. Sci Technol. 31 (2018) 015015.

Cubero, A., Navarro, R., Kováč, P., Kopera, L., Rindfleisch, M., and Martínez, E.: Quench dynamics in MgB2 Rutherford cables, Supercond. Sci Technol. 31 (2018) 045009.

  • 2017
Kopera, Ľ., Kováč, P., Kulich, M., Melišek, T., Rindfleisch, M., Yue, J., Hušek, I., : Critical currents of Rutheford MgB2 cables compacted by two-axial rolling. Supercond. Sci Technol. 30 (2017) 015002. (APVV 14-0522). (VEGA 2/0129/16).

 

Kováč, P., Kulich, M., Kopera, Ľ., Melišek, T., Kováč, J., Hušek, I., : Filamentary MgB2 wires manufactured by different processes subjected to tensile loading and unloading. Supercond. Sci Technol. 30 (2017) 065006. (APVV 14-0522). (VEGA 2/0129/16).

 

Kováč, P., Hušek, I., Melišek, T., Kulich, M., Rosová, A., Kováč, J., Kopera, Ľ., Balog, M., Krížik, P., Orovčík, Ľ., : Lightweight Al-stabilized MgB2 conductor made by the IMD process. Supercond. Sci Technol. 30 (2017) 115001. (APVV 14-0522).

 

Kováč, P., Balog, M., Hušek, I., Kopera, Ľ., Krížik, P., Rosová, A., Kováč, J., Kulich, M., Čaplovičová, M., :Properties of near- and sub-micrometre Al matrix composites strengthened with nano-scale in-situ Al2O3 aimed for low temperature applications. Cryogenics 87 (2017) 58–65. (APVV 14-0522).

 

Hušek, I., Kováč, P., Melišek, T., Kulich, M., Rosová, A., Kopera, Ľ., Szundiová, B., : Superconducting MgB2 wires with vanadium diffusion barrier. Supercond. Sci Technol. 30 (2017) 105008. (APVV 14-0522).

 

  • 2016
Kováč, P., Hušek, I., Melišek, T., Kulich, M., Kopera, Ľ., : Bending strain tolerance of a MgB2 superconducting wires. Supercond. Sci Technol. 29 (2016) 045002. (APVV 14-0522). (CENTE). (SUPRAPOWER).

 

Kováč, P., Hušek, I., Pachla, W., Melišek, T., Kulich, M., Rosová, A., Kopera, Ľ., : Effect of cold isostatic pressing on the transport current of filamentary of MgB2 wire made by the IMD process. Supercond. Sci Technol. 26 (2016) 075004. (APVV 14-0522). (VEGA 2/0129/16).

 

Kováč, P., Hušek, I., Melišek, T., Kopera, Ľ., Kulich, M., : Fast creation of dense MgB2 phase in wires made by IMD process,. Supercond. Sci Technol. 26 (2016) 10LT01.. (APVV 14-0522). (VEGA 2/0129/16).

 

Kováč, P., Hušek, I., Kováč, J., Melišek, T., Kulich, M., Kopera, Ľ., : Filamentary MgB2 wires with low magnetization AC losses. IEEE Trans. Applied Supercond. 26 (2016) 6200705. (VEGA 2-0121-12)(APVV 14-0522)(CENTE). (SUPRAPOWER).

 

Kováč, P., Hušek, I., Kulich, M., Melišek, T., Kováč, J., Kopera, Ľ., : MgB2 wires with Ti and NbTi barrier made by IMD process. Cryogenics 79 (2016) 74-78. (APVV 14-0522). (VEGA 2/0129/16). (CENTE).

 

  • 2015
Kováč, P., Kopera, Ľ., Melišek, T., Kulich, M., Hušek, I., Lin, H., Yao, C., Zhang, X., Ma, Y., :Electromechanical properties of iron and silver sheathed Sr0.6K0.4Fe2As2 tapes. Supercond. Sci Technol. 28 (2015) 035007. (APVV 0495-10). (VEGA 2-0121-12).

 

Kováč, P., Hušek, I., Rosová, A., Kulich, M., Melišek, T., Kopera, Ľ., Dobročka, E., : Interface MgB2 layers made by magnesium diffusion into boron. In: Progress in Applied Surface, Interface and Thin Film Sci. 2015 – SURFINT-SREN IV. Extend. Abstract Book. Ed. R. Brunner. Bratislava: CU 2015. ISBN: 978-80-223-3975-9. P. 84.

 

Kováč, P., Hušek, I., Rosová, A., Kulich, M., Melišek, T., Kopera, Ľ., Brunner, B., : Properties of MgB2 wires made by internal magnesium diffusion into different boron powders. Supercond. Sci Technol. 28 (2015) 095014. (APVV 0495-10). (VEGA 2-0121-12). (SUPRAPOWER).

 

Kováč, P., Kopera, Ľ., Melišek, T., Sarmiento, G., Sanz Castillo, S., Brisigotti, S., Nardelli, D., Tropeano, M., :Tensile and bending strain tolerance of ex-situ MgB2/Ni/Cu superconductor tape. IEEE Trans. Applied Supercond. 25 (2015) 6200607. (SUPRAPOWER). (APVV 0495-10).

 

  • 2014
Kováč, P., Hušek, I., Melišek, T., Kopera, Ľ., Kováč, J., : Critical currents, Ic-anisotropy and stress tolerance of MgB2 wires made by internal magnesium diffusion. Supercond. Sci Technol. 27 (2014) 065003. (APVV 0495-10). (VEGA 2-0121-12).

 

Kováč, P., Kopera, Ľ., Melišek, T., Hušek, I., : Electro-mechanical behaviour of in situ W added MgB2 wire. Cryogenics 60 (2014) 5-8. (APVV 0495-10). (VEGA 2-0121-12).

 

Skákalová, V., Vretenár, V., Kopera, Ľ., Kotrusz, P., Mangler, C., Meško, M., Meyer, J., Hulman, M., :Electronic transport in composites of graphite oxide with carbon nanotubes. Carbon 72 (2014) 224-232.

 

Hossain, M., Motaman, A., Barua, S., Patel, D., Mustapic, M., Kim, J., Maeda, M., Rindfleisch, M., Tomsic, M., Çiçek, O., Melišek, T., Kopera, Ľ., Kario, A., Ringsdorf, B., Runtsch, B., Jung, A., Dou, S., Goldacker, W., Kováč, P., : The rolel of CHPD: superior critical current density and n-value obtained in binary in situ MgB2 cables. Supercond. Sci Technol. 27 (2014) 095016.

 

  • 2013
Kováč, P., Kopera, Ľ., Melišek, T., Rindfleisch, M., Haessler, W., Hušek, I., : Behaviour of filamentary MgB2 wires subjected to tensile stress at 4.2 K. Supercond. Sci Technol. 26 (2013) 105028. (APVV 0495-10). (VEGA 2-0121-12).

 

Rosová, A., Kováč, P., Hušek, I., Kopera, Ľ., : Composition changes in thin-filament MgB2/Ti/GlidCop® wires heat treated at variable periods,. J. Alloys Compounds 572 (2013) 25-30. (CENTE). (APVV 0495-10). (VEGA 2-0121-12).

 

Kováč, P., Hušek, I., Melišek, T., Kopera, Ľ., Polák, M., : Filamentary MgB2 superconductors with titanium barriers. J. Supercond. Novel Magnet. 26 (2013) 2109-2114. (APVV 0495-10). (VEGA 2-0121-12).

 

Kováč, P., Hušek, I., Kopera, Ľ., Melišek, T., Rosová, A., Dobročka, E., : Properties of in situ made MgB2 in Nb or Ti sheath. Supercond. Sci Technol. 26 (2013) 025007. (APVV 0495-10). (VEGA 2-0121-12). (CENTE II).

 

Kopera, Ľ., Kováč, P., Hušek, I., Melišek, T., : Rutherford cable made of single-core MgB2 wires. Supercond. Sci Technol. 26 (2013) 125007. (APVV 0495-10). (VEGA 2-0121-12). (EURATOM FU-CT-2007-00051).

 

  • 2012
Kopera, Ľ., Kováč, P., Hušek, I., : Calculated and measured normal state resistivity of 19-filament MgB2/Ti/Cu/stainless steel wire. Supercond. Sci Technol. 25 (2012) 025021.

 

Kováč, P., Kopera, Ľ., : Electromechanical properties of filamentary MgB2 wires. IEEE Trans. Applied Supercond. 22 (2012) 8400106.

 

Kováč, P., Melišek, T., Kopera, Ľ., Kováč, J., Hušek, I., : Selected properties of GlidCop® sheathed MgB2 wires. Supercond. Sci Technol. 25 (2012) 095008.

 

  • 2011
Polák, M., Demenčík, E., Hušek, I., Kopera, Ľ., Kováč, P., Mozola, P., Takács, S., : AC losses and transverse resistivity in filamentary MgB2 tape with Ti barriers. Physica C 471 (2011) 389-394. (VEGA 2/0037/09). (APVV 0398-07).

 

Kováč, P., Hušek, I., Melišek, T., Kopera, Ľ., : Current densities of thin filament MgB2/Ti/GlidCop® wire. Supercond. Sci Technol. 24 (2011) 105006. (VEGA 2/0037/09).

 

Rosová, A., Kováč, P., Hušek, I., Kopera, Ľ., : EDX and ion beam treatment studies of filamentary in situ MgB2 wires with Ti barrier. J. Alloys Compounds 509 (2011) 7961-7967. (VEGA 2/0037/09).

 

Kováč, P., Hušek, I., Melišek, T., Kopera, Ľ., : Filamentary MgB2 wire twisted before and after heat treatment. Supercond. Sci Technol. 24 (2011) 115006.

 

Rostila, L., Demenčík, E., Šouc, J., Brisigotti, S., Kováč, P., Polák, M., Grasso, G., Lyly, M., Stenvall, A., Tumino, A., Kopera, Ľ., : Magnesium diboride wires with nonmagnetic matrices – AC loss measurements and numerical calculations. IEEE Trans. Applied Supercond. 21 (2011) 3338-3341.

 

Kováč, P., Martinez, E., Melišek, T., Kopera, Ľ., Hušek, I., : Stability of multi-core MgB2/Ti/Cu/SS wires. Cryogenics 51 (2011) 16-20.

 

Hušek, I., Kováč, P., Melišek, T., Kopera, Ľ., : Thermally stabilized MgB2 composite wires with different barriers. Cryogenics 51 (2011) 550-554. (APVV 0495-10). (VEGA 2/0037/09).

 

  • 2010
Kováč, P., Hušek, I., Melišek, T., Kopera, Ľ., Reissner, M., : Cu stabilized MgB2 composite wire with an NbTi barrier Supercond. Sci Technol. 23 (2010) 025014. (VEGA 2/0037/09).

 

Rosová, A., Kováč, P., Hušek, I., Melišek, T., Kopera, Ľ., Šmatko, V., Vávra, I., : Difúzia materiálu v supravodivých kábloch analyzovaná pomocou zariadenia Quanta 3D, Technika 8 (2010) 48-49.

 

Kováč, P., Hušek, I., Rosová, A., Melišek, T., Kopera, Ľ., : Fine-filamentary in situ MgB2 wires. Supercond. Sci Technol. 23 (2010) 105006. (VEGA 2/0037/09).

 

Kováč, P., Hušek, I., Melišek, T., Kopera, Ľ., Reissner, M., : Stainless steel reinforced multi-core MgB2 wire subjected to variable deformations, heat treatments and mechanical stressing. Supercond. Sci Technol. 23 (2010) 065010. (VEGA 2/0037/09).

 

  • 2009
Kováč, P., Melišek, T., Kopera, Ľ., Hušek, I., Polák, M., Kulich, M., : Progress in electrical and mechanical properties of rectangular MgB2 wires. Supercond. Sci Technol. 22 (2009) 075026. (APVV 0398-07). (VEGA 2/0037/09).

 

Hušek, I., Kováč, P., Melišek, T., Kopera, Ľ., : Transport current densities of MgB2 wires, cable and continually transposed conductor. Cryogenics 49 (2009) 366-370. (APVV 0398-07). (VEGA 2/0037/09).

 

  • 2008
Kopera, Ľ., Kováč, P., Melišek, T., : Electromechanical characterization of selected superconductors. Supercond. Sci Technol. 21 (2008) art. no. 115001. (APVV 0398-07).

 

Kopera, Ľ., Šmatko, V., Prusseit, W., Polák, M., Semerad, R., Štrbik, V., Šouc, J., : In situ patterning of filamentary YBCO coated conductors. Physica C 468 (2008) 2351-2355. (APVV 51-040605).

 

  • 2006
Kopera, Ľ., Kováč, P., Melišek, T., : Compact design of cryogen-free HTS magnet for laboratory use. IEEE Trans. Applied Supercond. 16 (2006) 1415-1418.

 

  • 2005
Kováč, P., Masti, M., Lehtonen, J., Kopera, Ľ., Kawano, K., Abell, S., Metz, B., Dhalle, M., : Comparison and analysis of Hall probe scanning, magneto-optical imaging and magnetic knife measurements of Bi-2223/Ag tape. Supercond. Sci Technol. 18 (2005) 805-812.

 

Kopera, Ľ., Melišek, T., Kováč, P., Pitel, J., : The design and performance of a Bi-2223/Ag magnet cooled by a single-stage cryocooler. Supercond. Sci Technol. 18 (2005) 977-984.

 

Oemry, F., Diantoro, M., Sutjahja, I., Tjia, M., Kopera, Ľ., Bonfait, G., Kováč, P., : Variation of vortex structure characteristics of Bi-2223/Ag superconducting tapes with respect to applied magnetic field direction. Physica C 426-431 (2005) 396-401.

 

  • 2002
Kováč, P., Hušek, I., Kopera, Ľ., Melišek, T., van Eck, H., Metz, B., ten Haken, B., : Electrical and mechanical properties of Bi-2223/Ag tapes made by TIRT technique. Physica C 372-376 (2002) 891-894.

 

Kováč, P., Hušek, I., Kopera, Ľ., van der Meer, O., Metz, B., ten Haken, B., Kvitkovič, J., Polák, M., :Transversal and longitudinal current distribution in Bi-2223/Ag tapes with high filament aspect ratio. Physica C 372-376 (2002) 916-918.

 

  • 2001
Vávra, I., Bydžovský, J., Flachbart, K., Tejada, J., Kopera, Ľ., Kováčová, E., Temst, K., Bruynseraede, Y., :Fe/Cr sensor for the milliKelvin temperature range. Sensors & Actuators A 91 (2001) 177-179.

 

Kováč, P., Hušek, I., Pachla, W., Diantoro, M., Bonfait, G., Maria, J., Fröhlich, K., Kopera, Ľ., Diduszko, R., Presz, A., : Material for resistive barriers in Bi-2223/Ag tapes. Supercond. Sci Technol. 14 (2001) 966-972.

 

  • 2000
Gömöry, F., Hušek, I., Kováč, P., Kopera, Ľ., : AC susceptibility, critical densities and AC losses of Bi-2223/Ag tapes in perpendicular AC magnetic field. In: Studies in High-Temperature Phys. Vol. 32. Ed. A.Narlikar. New York: Nova Sci. Publ. 2000. P. 63.

 

Kováč, P., Hušek, I., Kopera, Ľ., : Advanced rolling techniques for Bi(2223)/Ag wires and tapes IoP Conf. Ser. No. 167 (2000) 455-458.

 

Kováč, P., Cambel, V., Kopera, Ľ., Melišek, T., Pitel, J., Bukva, P., : Quality measurement of Bi(2223)/Ag tapes by Hall probe array IoP Conf. Ser. No. 167 (2000) 531-534.

 

  • 1999
Kováč, P., Cesnak, L., Melišek, T., Hušek, I., Bukva, P., Pitel, J., Kopera, Ľ., Pachla, W., Bucholtz, W., : Currents in series and parallel connections of small inner bore coils wound from Bi(2223)/Ag tapes and treated by the wind and react technique Supercond. Sci Technol. 12 (1999) 507-513.

 

  • 1998
Kopera, Ľ., Kováč, P., Hušek, I., : New rolling technique for texturing of Bi(2223)/Ag tapes Supercond. Sci Technol. 11 (1998) 433.

 

  • 1997
Kováč, P., Hušek, I., Kopera, Ľ., : Application oftwo-axial rolling for multicore Bi(2223)/Ag tapes Supercond. Sci Technol. 10 (1997) 982.

 

Kováč, P., Hušek, I., Kopera, Ľ., Pachla, W., : Optimalization of rolling process for multicore Bi(2223)/Ag tapes made by OPIT technique IoP Conf. Series No. 158 (1997) 1343.

 

Kopera, Ľ., Kováč, P., Cesnak, L., : Sample holder for measuring of Ic-anisotropy in high magnetic fields Supercond. Sci Technol. 10 (1997) 995.

 

  • 1996
Kováč, P., Kopera, Ľ., Hušek, I., Cesnak, L., : Bending of Bi(2223)/Ag tapes at 77K and 300K Supercond. Sci Technol. 9 (1996) 792.

 

Hušek, I., Kováč, P., Kopera, Ľ., : Study of BSCCO-core density in multicore Ag sheathed tapes by microhardnees profiles Supercond. Sci Technol. 9 (1996) 1066.

 

  • 1995
Kováč, P., Cesnak, L., Kopera, Ľ., Fikis, H., Hilscher, G., : Ic-anisotropy in flettened Nb3Sn superconductors and possible ways for overcoming it Cryogenics 35 (1995) 83.

 

  • 1986
Huťka, P., Kováč, P., Šetina, P., Chlebáková, K., Kopera, Ľ., Jergel, M., : Výskum stabilizovaných Nb3Sn mnohožilových supravodičov na EÚ CEFV SAV, Transformátory 64 (1986) 8.

 

  • 1985
Kopera, Ľ., Kováč, P., Jergel, M., Huťka, P., : Multifilamentary Nb3Sn superconductor with graphite diffusion barrier. In: Conf. Magnet Technol. Zürich: 1985. P. 497.

 

Huťka, P., Kováč, P., Šetina, P., Chlebáková, K., Kopera, Ľ., Jergel, M., : Vývoj stabilizovaných Nb3Sn supravodičov na ElÚ SAV, Elektrotechn. časopis 36 (1985) 870.