Ing. Lubomil JANŠÁK, CSc.

2006

Janšák, L., Polák, M., and Kvitkovič, J.: Current-voltage characteristics and AC transport current losses of Bi-2223/Ag tapes with various tape width, J. Phys.: Conf. Ser. 43(2006) 91-94.

Polák, M., Demenčík, E., Janšák, L., Mozola, P., Aized, D., Thieme, C.L.H., Levin, G.A., and Barnes, P.N.: ac losses in a YBa₂Cu₃O_7-x coil, Applied Phys. Lett. 88 (2006) 23501-1-3.

Polák, M., Ušák, E., Janšák, L., Demenčík, E., Levin, G.A., Barnes, P.N., Wehler, D., and Moenter, B.: Coupling losses and transverse resistivity of multifilament YBCO coated superconductors, J. Phys.: Conf. Ser. 43 (2006) 591-594.

Polák, M., Demenčík, E., Janšák, L., Ušák, E., Mozola, P., Thieme, C.L.H., Aized, D., Levin, G.A., and Barnes, P.N.: Properties of a YBCO pancake coil operating with AC current at frequencies up to 1000 Hz, IEEE Trans. Applied Supercond. 16 (2006) 1423-1426.

Polak, M., Kvitkovič, J., Janšák, L., and Mozola, P.: The effect of epoxy impregnation on the behaviour of a Bi-2223/Ag coil carrying DC or AC current, Supercond. Sci Technol. 19 (2006) 256-262.

2004

Polak, M., Kvitkovič, J., Demenčík, E., Janšák, L., and Mozola, P.: Temperature of Bi-2223/Ag samples in the resistive section of I-V curves, Physica C 401 (2004) 160-164.

Lackner, R., Hense, K., Kirchmayr, H., Leoni, J., Müller, M., Janšák, L., and Polak, M.: Effect of filament arrangement on the transversal resistivity of Bi-2223 tapes. In: Applied Superconductivity 2003. Proc. of the 6^th EUCAS, Sorrento 2003. IoP Conf. Ser. No 181. Eds. A. Andreone et al. Bristol: IoP 2004. P. 2379-2385.

2003

Janšák, L., Zizek, F., Jelinek, J., Timoransky, Z., Piel, H., and Polak, M.: Loss analysis of a model transformer winding, IEEE Trans. on Applied Supercond. 13 (2003) 2352.

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.

2002

Polák, M., Ušák, P., 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., Ušák, P., and Žižek, F.: 15kVA superconducting transformer. In: 7^th Int. Conf. Cryogenics 2002. Praha 2002. P. 46-48.

2001

Janšák, L.: A capacitance temperature sensor for the liquid nitrogen region, Cryogenics 41 (2001) 607-608.

Zannella, S., Montelatici, L., Grenci, G., Pojer, M., Janšák, L., Majoroš, M., Colleta, G., Mele, R., Tebano, R., and Zanovello, F.: AC losses in transport current regime in applied ac magnetic field: experimental analysis and modeling, IEEE Trans. on Applied Supercond. 11 (2001) 2441-2444.

Polák, M., Ušák, P., 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.

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

2000

Polák, M. and Janšák, L.: Self-field losses and I-V curves of Bi-2223 tape without silver sheath. In: EUCAS ’99, Inst. of Physics Conf. Ser. 167 (2000) 911-914.

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

Polak, M. and Jansak, L.: Transport current ac losses and current-voltage curves of multifilamentary Bi-2233/Ag tape with artificial defects, Supercond. Sci & Technology 13 (2000) 1074-1078.

Foitl, M., Jansak, L., Kasztler, A., Kirchmayr, H., Kral, I., Krempasky, L., Kvitkovic, J., and Polak, M.: Magnetisation of Nb₃Sn wires using a Hall probe and an inductive measurement technique. In: Advanced in Cryogenic Engn. Ed. U.B.Balachandran. Vol. 46, Part B – ICMC-99 Montreal. New York, Kluwer Acad. 2000. P. 1019-1026.

Ušák, P., 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.

1999

Janšák, L.: AC self-field loss measurement system, Review of Sci Instruments 70 (1999) 3087-3091.

1998

Majoroš, M., Janšák, L., Zannella, S., Curcio, F., La Cascia, P., Ottoboni, V., Friend, C.M., LeLay, L., Glowacki, B.A., and Campbell, A.M.: Temperature dependence of transport ac losses in Bi-2223/Ag multifilamentary tapes, Physica C 310 (1998) 6.

Hlásnik, I., Majoroš, M., and Janšák, L.: AC losses in superconducting wires and cables. In: Handbook of Applied Superconductivity. Vol. 1. Ed. B.Seeber. Bristol, Inst. of Phys. Publ. 1998. P. 344.

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

1997

Majoroš, M., Janšák, L., Sello, S., Zanella, S.: Transient analysis of HTS inductive fault current limiter. In: Applied Supercond. Con. Pittsburgh (USA), 1996, IEEE Trans. Applied Supercond. 7 (1997) 989.

Zannella, S., Janšák, L., and Donadio, P.: Inductive high-T_c superconducting fault current limiter based on Bi-2212 tube, Cryogenics 37 (1997) 667-670.

Zannella, S., Arienti, A., Giunchi, G., Janšák, L., Majoroš, M., and Ottoboni, V.: Development of an inductive high-T_c superconducting fault current limiter. In: Applied Superconductivity 1997, Inst. Phys. Conf. Series No. 158 (1997) 1239.

Majoroš, M., Janšák, L., Sello, S., Zannella, S.: Transition properties of HTS inductive fault current limiter. In: Applied Superconductivity 1997, Inst. Phys. Conf. Series No. 158 (1997) 1231.

Janšák, L ., Kokavec, J., Kvitkovič, J., Galbraith, P., and Henrichsen, K.N.: Low field NMR magnetometry using flowing water. In: Proc. Int. Conf. „Measurement 97“. Eds. I.Frollo, A.Plačková. Bratislava, UMMT 1997. P. 328.

1996

Janšák, L., Chovanec, F., Kokavec, J., and Jergel, M.: Critical current anisotropy and AC losses in Bi(Pb)SrCaCuO-2223 and TlBaCaCuO-2212 Ag sheathed superconducting tapes. In: Magnet Technology 14. Tampere, IEEE Trans. on Magnet. 32 (1996) 2788.

Hlásnik, I., Janšák, L., Majoroš, M., Kokavec, J., Chovanec, F., Martini, L., and Zanella, S.: Self-field effect on Ag/HTS tapes – skin effect at resistivity strongly increasing with J versus critical state model. In: MT14 Tampere 1995, IEEE Trans. on Magnet. 32 (1996) 2806.

Ušák, P., Janšák, L., and Chovanec, F.: Anisotropy of E(j) characteristics of Ag-sheathed BSCCO tapes with respect to external magnetic field, Applied Superconductivity 4 (1996) 577. (Printed in 1997).

1995

Janšák, L., Majoroš, M., Frangi, F., and Zannella, S.: Anomalous behavior of inductive fault current limiter models based on high-T_c superconductors, Physica C 247 (1995) 231.

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

1994

Frangi, F., Janšák, L., Majoroš, M., Zannella, S.: Trapped magnetic fields in melt-textured YBCO, Physica C 224 (1994) 20.

Hughes, T., Yang, T., Beduz, C., Yi, Z., Janšák, L., Mahdi, A.E., Stoll, R.L., Sykulski, J.K., and Harris, M.R.: Measurements of self-field AC losses in PbBi-2223 Ag sheathed tapes, Physica C 235-240 (1994) 3423.

Yang, Y., Hughes, T., Beduz, C., Scurlock, R.G., and Janšák, L.: Studies of self-field AC losses in PbBi-2223 Ag sheathed tapes, Cryogenics 34 (1994) S789.

1993

Zannella, S., Janšák, L., Salama, K., and Selvamanickam, V.: 50Hz self-field losses in melt-textured YBa₂Cu₃O_7-x bars, Cryogenics 33 (1993) 31.

Zannella, S., Janšák, L., Majoroš, M., Selvamanickam, V., and Salama, K.: AC energy dissipation in high-T_c superconductors, Physica C 205 (1993) 14.

Janšák, L., Ottoboni, V., and Zannella, S.: Studies on the feasibility of a superconducting fault current limiter. In: CISE SpA Final Report No. 7475, 1993.

Majoroš, M., Zannella, S., Ottoboni, V., and Janšák, L.: AC losses in fine filamentary NbTi superconductors with Cu and CuNi matrix. In: Applied Superconductivity 1. Ed. H.C.Freyhardt. Oberursel, DGM 1993. P. 27.

1992

Janšák, L., Ricca, A., and Zannella, S.: Preliminary study of the feasibility of a superconducting fault current limiter. In: CISE SpA Final Report No. 6593, 1992.

1991

Hlásnik, I., Kokavec, J., Fröhlich, K., and Janšák, L.: Static and dynamic characteristics of Nb₃Ge layers for rapid superconducting power switches, Cryogenics 31 (1991) 590.

Zannella, S., Janšák, L., Lee, D., and Salama, K.: AC losses of YBa₂Cu₃O_7-x high temperature superconductors, Physica C 180 (1991) 373.

Vasiljev, A.A., Kozlov, S.M., Majoroš, M., Polák, M., Chernov, N.N., and Janšák, L.: Automated apparatus for current-voltage characteristics measurements of superconducting materials. Leningrad, Academy of Sci. USSR, Inst. of Nuclear Physics 1991, preprint No. 1675 (in Russian).

Majoroš, M., Polák, M., and Janšák, L.:Influence of Cu-CuNi matrix composition on AC losses in NbTi fine-filamentary superconductors. In: Proc. of the Int. Symposium on AC Superconductors. Ed. I.Hlásnik. Bratislava, IEE SAS 1991. P. 62.

Hlásnik, I., Kokavec, J., and Janšák, L.: Static and transient resistive characteristics of NbTi composites for superconducting transformers and switches used in sc power supply for sc magnets. In: Proc. of the Int. Symposium on AC Superconductors. Ed. I.Hlásnik. Bratislava, IEE SAS 1991. P. 121.

Martini, L., Ottoboni, V., Ricca, A., Ripamonti, G., Zannella, S., and Janšák, L.: Preliminary study of fault current limiter using high T_c superconducting (HTS) materials. In: Proc. of the Int. Symposium on AC Superconductors. Ed. I.Hlásnik. Bratislava, IEE SAS 1991. P. 137.

1990

Polák, M., Janšák, L., and Majoroš, M.: Method for determining transverse resistivity of multifilamentary superconducting composites with high resistivity matrix, Cryogenics 30 (1990) 697.

1986

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

Brucese, K., Janšák, L., Ottoboni, V., Ricca, A.M., Ripamonti, N., Sachetti, N., Spadoni, M., and Zannella, S.: AC losses in Nb₃Al multifilamentary wires measured by magnetization. In: ICEC 11. Berlin, 1986. P. 735.

Chovanec, F., Kokavec, J., Krempaskýý, L., Janšák, L., Alikaev, V.V., Dochenkov, A.S., Volobaiev, A.N., Monozon, N.A., Churakov, G.F. a Jakubovski, V.G.: Investigation of series of superconducting magnet systems for gyrotron s plasma heating in TOKAMAK T15. In: ICEC 11. Berlin, 1986. P. 735.

1981

Chovanec, F., Drobin, V.M., Dyachkov, E.I., Janšák, L., Khutchareva, I.S., Kulikov, J.V., Lupov, V.G., Malynk, V.A., and Smirnov, A.A.: Losses in superconducting cables in pulsed magnetic field, Cryogenics 21 (1981) 359.

Janšák, L.: Double integration method for AC loss measurement in superconducting magnets, IEEE Trans. on Magnetics 17 (1981) 2039.

Choang Kao Zung, a Janšák, L .: Upravľajemyj ot EVM programmator dľa istočnika toka. Preprint SUJV P13-81-101. Dubna, 1981.

1980

Janšák, L. and Chovanec, F.: An analogue digital double intefration joulmeter for ac measurements in superconducting magnets, Cryogenics 20 (1980) 125.

Janšák, L .: Primenenije diodnych datčikov v nizkotemperaturnoj termometrii (Obzor). Preprint SUJV 13 -80-113. Dubna, 1980.

Janšák, L .: Metod dvojnoj integracii dľa izmerenija poter energii v sverchprovoďaščich magnitach. Preprint SUJV P13-80-698. Dubna, 1980.

Janšák, L .: Analiz iomkostnovo metoda opredelenija parosoderžanija v potoke dvuchfaznovo gelija. Preprint SUJV 8-80699. Dubna, 1980.

Drobin, V.M., Djačkov, E.I., Kulikov, J.V., Kurjatnikov, E.K., Luppov, V.G., Maľuk, V.A., Smirnov, A.A., Chovanec, F., Chuchareva, I.S. a Janšák, L .: Poteri v sverchprovoďaščch kkabeľach v impuľsnych magnitnych poľach. Preprint SUJV P8-80-575. Dubna, 1980.

1979

Janšák, L . a Maľuk, V.A.: Indikator urovňa židkovo gelija. Preprint SUJV 8-12104. Dubna, 1 979.

Choang Kao Zung, Chovanec, F. a Janšák, L .: Sistema na linii s EVM TRA-70 v standarde KAMAK dľa izmerenija dinamičeskich poter v sverchprovoďaščich magnitach i kabeľjach. Preprint SUJV 10-12316. Dubna, 1979.

Choang Kao Zung, Chovanec, F. a Janšák, L .: Mikroprocessornaja avtonomnaja sistema v standarde KAMAK dľa izmerenija poter energii v sverchoprovoďaščich kabeľjach i impuľsnych magnitach. Preprint SUJV 10-12317. Dubna, 1979.

Janšák, L . a Chovanec, F.: Analogovo-cifrovoj džouľmetr s dvojnoj integracijej dľa izmerenija poter na peremennom toke v sverchprovoďaščich magnitach. Preprint SUJV P13-12501. Dubna, 1979.

1978

Janšák, L ., Štofanik, F. a Chovanec, F.: Programmator dľa upravlenija istočnikami toka. Preprint SUJV 13-11676. Dubna, 1978.

Chovanec, F., Djačkov, E.I., Nikitajev, P.I., Chodžibagijan, G.G. a Janšák, L.: Vl ijanije orientacii transponirovannovo sverchprovoďaščevo kabeľa v obmotke na poteri energii v impuľsnych solenoidach. Preprint SUJV P8-11145. Dubna, 1978.

1977

Jergel, M., Janšák, L., and Blahová, M.: Application of a silicon linear thermometer for superconducting transition temperatures measurements, Acta Physica Slovaca 27 (1977) 73.

1975

Janšák, L., Kordoš, P., and Blahová, M.: Silicon and gallium arsenide diodes for low-temperature thermometry. In: Inst. Phys. Conf. Ser. No.26 (1975) 65.

Kordoš, P., Janšák, L ., and Benč, V.: Preparation and properties of doped epitaxial GaAs, Solid State Electronics 18 (1975) 223.

Janšák, L. and Kordoš, P.: Preparation and properties of GaAs p-n junction in the wide temperature range, Elektrotechn. časopis 26 (1975) 312.

1974

Janšák, L. and Kordoš, P.: Thermometric diode made from epitaxial GaAs, Czechoslovak J. of Phys. A 24 (1974) 364.

Janšák, L. and Kordoš, P.: Wide-range resistence thermometer made from Mn-doped epitaxial GaAs, Cryogenics 14 (1974) 467.

Janšák, L .: Application of type GaAs in low temperature thermometry, Elektrotechn. časopis 25 (1974) 449.

Janšák, L. a Polák, M.: The temperature dependence of the Hall constant quantum oscilations in the heavily doped InSb, Elektrotechn. časopis 25 (1974) 456.

1973

Kordoš, P., Janšák, L ., and Benč, V.: Magnetic field and low temperature sensor made from epitaxial GaAs, Cryogenics 13 (1973) 312.

1972

Janšák, L. and Lagunova, T.S.: Effect of magnetic field on the impurity conduction in p-GaAs, Physica Status Solidi (1972) K151.

1970

Janšák, L.: Cryostat and superconducting solenoids, Czechosl. J. Phys. A 20 (1970) 100.

Janšák, L.: Low temperature semiconductuctors thermometers with small magnetoresistance, Czechosl. J. Phys. A 20 (1970) 241.

1969

Janšák, L.: A semiconductor liquid helium level inducator, Czechosl. J. Phys. A 19 (1969) 412.