Mike D. Sumption
Assistant Director, LASM
B.S., Physics, The Ohio State University
M.S., Physics, Ohio University
Ph.D., Physics, Ohio University
Interests:
Dr. Sumption interests lie in Materials Science and Solid State Physics. His area of concentration has been in superconductive and magnetic materials. Experimental work has focussed on the electrical (resistance, critical currents) and magnetic (cAC, cDC, vibrating sample magnetometry, SQUID, magnetically measured contact resistance) response of materials. Additional experimental work has involved calorimetric measurements and, separately, mechanical alloying.
Theoretical work has been in the areas of anisotropic continuum modelling, including; bridging loss and magnetic creep in HTSC and LTSC, proximity and eddy currents in LTSC. Additional work has been in the area of diffusion of Cr in metallic stabilizers.
Materials investigated include low Tc superconductors; NbTi, Nb3Sn, Nb3Al, NbTiTa, as well as high Tc superconductors; YBC, Bi-, and Tl- compounds. Experience includes work with thin films, bulk, single crystals, OPIT wires, and melt grown samples. Dr. Sumption's experience in magnetic materials includes work with magnetic tape as well as spin glass alloys.
PUBLICATIONS REFERENCE LIST
1. HYSTERETIC SURFACE EFFECTS IN MULTIFILAMENTARY NbTi WIRES EXPOSED TO TRANSVERSE APPLIED FIELDS, M.D. SUMPTION, K.R. MARKEN, Jr., AND E.W. COLLINGS, IEEE Trans. Magn. 27, 2166-2169 (1991).
2. POSITION AND AMPLITUDE OF PROXIMITY EFFECT PEAKS IN THE MAGNETIZATION CURVES OF NbTi/Cu AND NbTi/CuMn MULTIFILAMENTARY STRANDS, M.D. SUMPTION, K.R. MARKEN, Jr., AND E.W. COLLINGS, IEEE Trans. Magn. 27, 1129-1132 (1991).
3. EDDY-CURRENT EFFECTS IN TWISTED AND WOUND SSC STRANDS, K.R. MARKEN, A.J. MARKWORTH, M.D. SUMPTION, E.W. COLLINGS, AND R.M. SCANLAN, IEEE Trans. Magn. 27, 1791-1795 (1991).
4. ADVANCED STRAND DESIGN FOR PRECISION DC-FIELD AND RAMP-FIELD MAGNETS, E.W. COLLINGS AND M.D. SUMPTION, IEEE Trans. Magn. 28, 156-159 (1992).
5. DESIGN, FABRICATION, AND PROPERTIES OF MAGNETICALLY COMPENSATED SSC STRANDS, E.W COLLINGS, K.R. MARKEN, Jr., M.D. SUMPTION, G. IWAKI, AND S. SAKAI, IEEE Trans. Magn. 27,1787-1790 (1991).
6. DESIGN OF MULTIFILAMENTARY STRANDS FOR SSC DIPOLE MAGNETS, E.W. COLLINGS, K.R. MARKEN,Jr., AND M.D. SUMPTION, in Supercollider 2, ed. by M. McAshan, Plenum Press, 1990, pp. 581-592.
7. DESIGN OF COUPLED OR UNCOUPLED MULTIFILAMENTARY SSC-TYPE STRANDS WITH ALSO ZERO RETAINED MAGNETIZATION AT FIELDS NEAR 0.3T, E.W. COLLINGS, K.R. MARKEN, Jr., AND M.D. SUMPTION, Adv. in Cryo. Eng. (Materials) 36, 247-254 (1990).
8. MAGNETIC STUDIES OF PROXIMITY-EFFECT COUPLING IN VERY CLOSELY SPACED FINE-FILAMENT NbTi/CuMn COMPOSITES, E.W. COLLINGS, K.R. MARKEN, Jr., M.D. SUMPTION, E. GREGORY AND T.S. KREILICK, Adv. in Cryo. Eng. (Materials) 36, 231-238 (1990).
9. INTERFILAMENT AND INTRAFILAMENT MAGNETIZATIONS IN FINE-FILAMENT COMPOSITE STRANDS FOR PRECISION-DIPOLE MAGNET APPLICATIONS, E.W. COLLINGS, K.R. MARKEN, Jr., AND M.D. SUMPTION, Cryogenics 30, 48-55, (1990).
10. AC LOSS MEASUREMENTS OF TWO MULTIFILAMENTARY NbTi COMPOSITE STRANDS, E.W. COLLINGS, K.R. MARKEN Jr., M.D. SUMPTION, R.J. LOUGHLAN AND R.B. GOLDFARB, Adv. in Cryo. Eng. (Materials) 36, 169-176 (1990).
11. CRITICAL FIELD ENHANCEMENT DUE TO FIELD PENETRATION IN FINE-FILAMENT SUPERCONDUCTORS, E.W. COLLINGS, K.R. MARKEN, Jr., A.J. MARKWORTH, J.K. McKOY, M.D. SUMPTION, E. GREGORY AND T.S. KREILICK, Adv. in Cryo. Eng. (Materials) 36, 255-261 (1990).
12. AC LOSS AND TRANSVERSE RESISTIVITY IN MULTIFILAMENTARY STRANDS WITH MATRICES OF Cu AND CuMn E.W. COLLINGS and M.D. SUMPTION, Cryogenics 32 585-588 (1992).
13. LOWER CRITICAL FIELD DETERMINATION IN THICK RODS OF HIGH-Jc MELT-PROCESSED YBCO, M.D. SUMPTION, E.WE. COLLINGS, M.V. PARISH, WANG JINGRONG, AND W.J. CARR, Jr., AIP Conference Proc. on Superconductivity and its Applications 251, 547-556 1991, ed. by Y.H. Kao, A.E. Kaloyeros, and H.S. Kwok.
14. AC LOSS AND DYNAMIC RESISTANCE OF A HIGH Tc STRAND CARRYING A DIRECT CURRENT IN A TRANSVERSE AC MAGNETIC FIELD,
E.W. COLLINGS, K.R. MARKEN, M.D. SUMPTION, JOHN R. CLEM, S.A. BOGGS, AND M.V. PARISH, Adv. Cryo. Eng. (Materials) 38 883-891 (1992).
15. STATIC AND DYNAMIC MAGNETIZATIONS OF 3-D TEXTURED AND MONOCRYSTALLINE BI:2212 M.D. SUMPTION, Y. HIGASHIDA, K. MICHISIHITA, N. KOSHIZUKA, GU GENDA, AND E.W. COLLINGS, in Advances in Superconductivity -- VI, ed. by T. Fujita and Y. Shiohara (Springer-Verlag, Tokyo, 1994) pp. 593-596.
16. HYSTERETIC METHOD OF LOWER CRITICAL FIELD DETERMINATION IN HIGH Tc SUPERCONDUCTORS, E.W. COLLINGS, M.D. SUMPTION, AND W.J. CARR, Jr., Supercond. Sci. Technol. 5, s248-255 (1992).
17. LOW FIELD AC LOSS AND LOWER CRITICAL FIELD IN PMP HIGH-Tc SUPERCONDUCTORS, E.W. COLLINGS, K.R. MARKEN, Jr., M.D. SUMPTION, ZHOU LIAN, WANG JINGRONG, ZHANG PINXIANG, AND W.J. CARR, Jr., Adv. Cryo. Eng. (Materials) 38 957-964 (1992).
18. LOWER CRITICAL FIELD STUDIES OF MELT-TEXTURED AND MELT-GROWN YBa2Cu307-x, M.D. SUMPTION, K. SALAMA, T.S. LUHMAN, M. STRASIK, AND E.W. COLLINGS, in Advances in Superconductivity -- VI, ed. by Fujita and Y. Shiohara (Springer-Verlag, Tokyo, 1994) pp. 597-600.
19. INFLUENCE OF CABLE AND TWIST PITCH INTERACTION ON EDDY CURRENTS IN MULTIFILAMENTARY STRANDS CALCULATED USING AN ANISOTROPIC CONTINUUM MODEL, M.D. SUMPTION AND E.W. COLLINGS, Adv. Cryo. Eng. (Materials) 40 579-587 (1994).
20. TRANSVERSE RESISTIVITIES OF Cu-MATRIX AND Cu-Mn MATRIX MULTIFILAMENTARY STRANDS AS FUNCTIONS OF MAGNETIC FIELD AND TEMPERATURE,M.D. SUMPTION AND E.W. COLLINGS, Adv. Cryo. Eng. (Materials) 40 807-814 (1994).
21. TEMPERATURE AND FIELD DEPENDENCE OF SHORT TERM DECAY AND LOSS IN MULTIFILAMENTARY SUPERCONDUCTORS, M.D. SUMPTION AND E.W. COLLINGS, Adv. Cryo. Eng. (Materials) 38 751-758 (1992).
22. FIELD AND LENGTH DEPENDENCE OF THE CREEP RATE IN PROXIMITY EFFECTED MULTIFILAMENTARY STRANDS, M.D. SUMPTION AND E.W. COLLINGS, Adv. Cryo. Eng. (Materials) 40 799-806 (1994).
23. LOWER CRITICAL FIELD DETERMINATION FOR A ROD OF FLOAT-ZONE PROCESSED BiSrCaCuO: 2212/Ag COMPOSITE D.S. PYUN, M.D. SUMPTION, E.W. COLLINGS, Y. HIGASHIDA, AND K. MICHISHITA, in Advances in Superconductivity -- V, (Springer-Verlag, Tokyo, 1993), pp. 192-202.
24. FERROMAGNETIC MATERIAL IN THE SUPERCONDUCTOR AND ITS EFFECT ON THE MAGNETIZATION SEXTUPOLE AND DECAPOLE IN THE SSC DIPOLES AT INJECTION, M.A. GREEN, E.W. COLLINGS, K.R. MARKEN, AND M.D. SUMPTION, in Supercollider 3, Plenum Press, 1991, pp. 365-373.
25. CURRENT DENSITY AND MAGNETIZATION OF FINE FILAMENTARY NbTi SUPERCONDUCTORS H. KANITHI, P. VALARIS, W. WEIGERT, E.W. COLLINGS, AND M.D. SUMPTION, Fifth Annual Industrial Symposium on the Supercollider (IISS-1993), May 6-8, San Francisco, 1993 -- to be published.
26. TRANSVERSE AND LONGITUDINAL RESISTIVITIES IN NbTi MULTIFILAMENTARY STRANDS WITH Cu AND CuMn MATRICES M.D. SUMPTION, D.S. PYUN, and E.W. COLLINGS, IEEE Trans. Appl. Supercond. 3 859-862 (1993).
27. ENHANCED STATIC MAGNETIZATION AND CREEP IN SSC-TYPE STRANDS VIA CABLE AND TWIST PITCH ASSISTED PROXIMITY EFFECTS M.D. SUMPTION, K.R. MARKEN, Jr., AND E.W. COLLINGS, IEEE Trans. Applied Supercond. 3 751-756 (1993).
28. EXPERIMENTS TO IMPROVE MATERIALS FOR SSC MAGNETS E. GREGORY, H. LIU, G.M. OZERYANSKY, M.D. SUMPTION, K.R. MARKEN, Jr., AND E.W. COLLINGS, IISSC, 1992 -- to be published.
29. EFFECT OF TWIST PITCH, SAMPLE LENGTH, AND FIELD ORIENTATION ON THE PROXIMITY ENHANCED MAGNETIZATION IN FINE FILAMENTARY MULTIFILAMENTARY STRANDS, M.D. SUMPTION AND E.W. COLLINGS, Adv. in Cryo. Eng. (Materials) 38 783-758 (1992).
30. INFLUENCE OF TWIST-PITCH AND SAMPLE LENGTH ON PROXIMITY EFFECT COUPLING IN MULTIFILAMENTARY COMPOSITES DESCRIBED IN TERMS OF A FIELD-INDEPENDENT, TWO-CURRENT-REGION MODEL, M.D. SUMPTION AND E.W. COLLINGS, Cryogenics 34, 491-505 (1994).
31. INFLUENCE OF NI ADDITIONS ON THE LOW TEMPERATURE MAGNETIC PROPERTIES OF A Cu-1%Ni ALLOY M.D. SUMPTION AND E.W. COLLINGS, J. Appl. Phys. 76 7461 (1994).
32. CREEP IN SUPERCONDUCTIVE COMPOSITES WITH ANISOTROPIC PINNING POTENTIALS, M.D. SUMPTION AND E.W. COLLINGS, J. Appl. Phys., 76 4766, 1994.
33. STABILITY, MECHANICAL CONSIDERATIONS, AND AC LOSS IN HTSC MONOLITHS, COILS, AND WIRES M.D. SUMPTION AND E.W. COLLINGS, Presented at the 4th World Congress on Superconductivity, Orlando, FL, July 27-July 1, 1994.
34. CHROMIUM DIFFUSION INTO PLATED NbSn STRANDS DEDUCED FROM ELECTRICAL RESISTIVITY MEASUREMENT M.D. SUMPTION AND E.W. COLLINGS, IEEE Trans. Appl. Superconductivity, Submitted for Publication.
35. CONTACT RESISTANCE AND CABLE LOSS MEASUREMENT OF COATED STRANDS AND THE CABLES WOUND FROM THEM M.D. SUMPTION, H.H.J. TENKATE, R.M. SCANLAN, AND E.W. COLLINGS, IEEE Trans. Appl. Superconductivity, to be published.
36. CALCULATION OF THE MAGNETIZATION OF ANISOTROPIC SUPERCONDUCTORS WITH CYLINDRICAL GEOMETRY IN TRANSVERSE FIELDS,M.D. SUMPTION, Applied Superconductivity, 2 41-46, 1994.
37. BRIDGING IN SUPERCONDUCTORS M.D. SUMPTION AND E.W. COLLINGS, Proc. Symposium Critical State in Superconductors, Honolulu, HI, Oct. 24-26 (1994) -- Submitted for publication.
38. CALORIMETRIC MEASUREMENTS OF THE EFFECT OF NICKEL AND STABRITE COATINGS AND RESISTIVE CORES ON AC LOSS IN ACCELERATOR CABLES UNDER FIXED PRESSURE M.D. SUMPTION, R.M. SCANLAN, A. NIJHUIS, H.H.J. TEN KATE AND E.W. COLLINGS, Adv. in Cryo. Eng. (Materials), to be published.
39. MATERIALS SELECTION FOR FERROMAGNETIC COMPENSATION IN ACCELERATOR MAGNETS E.W. COLLINGS AND M.D. SUMPTION, IEEE Trans. Appl. Superconductivity, submitted for publication.
40. A MODEL FOR BRIDGING AND COUPLING IN SUPERCONDUCTORS, M.D. SUMPTION AND E.W. COLLINGS, Physica C, to be published.
41. MAGNETIZATION STUDIES OF MULTIFILAMENTARY STRANDS FOR SUPERCONDUCTING SUPERCOLLIDER (SSC) APPLICATIONS -- METHODS OF CONTROLLING PROXIMITY-EFFECT COUPLING AND RESIDUAL MAGNETIZATION, E.W. COLLINGS, K.R. MARKEN, Jr., AND M.D. SUMPTION, International Atomic Energy (IAEA) Symposium on materials for Fusion and High Energy Physics, Tokyo, Japan, September 1989 -- IAEA-TECDOC-594, April 1991.
42. MAGNETIC STUDIES OF AC LOSS IN PRESSURIZED RUTHERFORD CABLES WITH COATED STRANDS AND RESISTIVE CORES E.W. COLLINGS, M.D. SUMPTION, R.M. SCANLAN, S.W. KIM, M. WAKE, AND T. SHINTOMI, Adv. Cryo. Eng. 42, to be published.
43. A COMPARISON OF AC LOSS, MAGNETIZATION, Hr, AND U0 FOR Bi:2212 WIRES, CRYSTALS, AND MELT GROWN SAMPLESM.D. SUMPTION AND E.W. COLLINGS, Invited paper, to be published in Applied Superconductivity, 3, No. 6, 1995.
44. ANOMALOUS MAGNETIC PROPERTIES AND PROXIMITY EFFECT COUPLING IN VAMAS STRANDS, M.D. SUMPTION AND E.W. COLLINGS, Submitted to Cryogenics.
45. MAGNETIC AND MICROSTRUCTURAL PROPERTIES OF MELT GROWN Yba2Cu3O7-x M.D. SUMPTION, T.S. LUHMAN, M. STRASIK, AND E.W. COLLINGS, Proceeding of the Sixth US-Japan Workshop on Superconductivity, Houston, Dec 6-7, 1993.
46. A STUDY OF AC LOSSES IN HTSC/Ag MULTIFILAMENTARY STRANDS, E.W. COLLINGS AND M.D. SUMPTION, Prepared for the 7th US-Japan Workshop on High-Tc Superconductors, Tsukuba, Japan, Oct 24-25, 1995.
47. REPORT ON THE SECOND VAMAS AC LOSS ROUND ROBIN -- MAGNETIZATION MEASUREMENT OF LOW-FREQUENCY HYSTERETIC LOSS, E.W. COLLINGS, M.D. SUMPTION, K. ITOH, H. WADA, AND K. TACHIKAWA, IEEE Trans. Applied Superconductivity, to be published.
48. CRITICAL CURRENT, FLUX PINNING, AND HYSTERETIC LOSS IN ROUND MULTIFILAMENTARY Bi:2212/Ag STRANDS M.D. SUMPTION, L.R. MOTOWIDLO, G. OZERYANSKY, G. GALINSKY, AND E.W. COLLINGS, To be published in Adv. Cryo. Eng. 42.
49. DUAL BARRIER FOR THE SUPPRESSION OF RESIDUAL RESISTANCE DEGRADATION IN CHROME-PLATED NIOBIUM-TIN STRANDS E. GREGORY, E.A. GULKO, T. PYUN, M.D. SUMPTION, AND E.W. COLLINGS,IEEE Trans. Appl. Superconductivity, submitted for publication.
50. ENHANCED PROXIMITY EFFECT COUPLING DUE TO THE PRESENCE OF A Nb BARRIER IN FINE NbTi MULTIFILAMENTARY COMPOSITES M.D. SUMPTION, H. LIU, E. GREGORY, AND E.W. COLLINGS, Adv. Cryo. Eng. 42, to be published.
51. STABILITY AND AC LOSSES IN HTSC/Ag MULTIFILAMENTARY STRANDS, E.W. COLLINGS AND M.D. SUMPTION, Applied Superconductivity, to be published.
52. SECOND VAMAS AC LOSS MEASUREMENT INTERCOMPARISON: MAGNETIZATION MEASUREMENT OF LOW-FREQUENCY (HYSTERETIC) AC LOSS IN NbTi MULTIFILAMENTARY STRANDS, E.W. COLLINGS, M.D. SUMPTION, K. ITOH, H. WADA, K. TACHIKAWA, Submitted to Cryogenics.
53. MAGNETIZATION DECAY OF SSC-TYPE STRANDS IN VARIOUS SHORT TEST SAMPLE CONFIGURATIONS, K.R. MARKEN, M.D. SUMPTION, E.W. COLLINGS, AND R.M. SCANLAN, Adv. in Cryo. Eng. (Materials) 38 715-722 (1992).
54. THE INFLUENCE OF FILAMENT SIZE AND ATMOSPHERE ON THE MICROSTRUCTURE AND Jc OF ROUND FILAMENT Bi2Sr2Ca1Cu2Ox WIRES L.R. MOTOWIDLO, G. GALINSKy, G. OZERYANSKY, W. ZHANG, E.E. HELLSTROM, M.D. SUMPTION, AND E.W. COLLINGS, IEEE Trans. Applied Supercond. 5 1162 (1995).
55. MAGNETIC AND PINNING FORCE STUDIES OF POWDER-MELT-PROCESSED YBCO SUPERCONDUCTOR, ZHOU LIAN, WANG JINGRONG, ZHANG PINXIANG, M.D. SUMPTION, K.R. MARKEN, AND E.W. COLLINGS, Adv. Cryo. Eng. (Materials) 38 935-942 (1992).
56. AC HYSTERESIS LOSS, LOWER CRITICAL FIELD, AND CRITICAL CURRENT DENSITY AT 77 k IN MELT PROCESSED Yba2Cu3O7-d WIRES AND RODS, E.W. COLLINGS, M.D. SUMPTION, K.R. MARKEN, Jr., ZHOU LIAN, M.V. PARISH, AND W.J. CARR, Jr., in Advances in Superconductivity -- IV, ed. by Hayakawa and N. Koshizuka, Springer-Verlag, 1992, pp. 153-157.
57. MAGNETIC PROPERTIES AND IRREVERSIBILITY BEHAVIOR IN Ag-SHEATHED Bi-BASED SUPERCONDUCTING WIRES FABRICATED USING A CONTROLLED MELT PROCEDURE S.X. DOU, H.K. LIU, Y.C. GUO, D.L.SHI, M.D. SUMPTION, AND E.W. COLLINGS, in Advances in Superconductivity -- V, (Springer-Verlag, Tokyo, 1993) pp. 761-766.
58. EFFECT OF FINAL COLD ROLLING ON FLUX PINNING IN MULTIPLY-PROCESSED Bi:2223 POWDER IN TUBE TAPES E.W. COLLINGS, M.D. SUMPTION, S.X. DOU, AND H.K. LIU, Adv. Cryo. Eng. (Materials) 40 161-168 (1994).
59. EDDY CURRENT AND CREEP BASED LOSSES IN CTFF-TYPE Bi:2223/Ag MULTIFILAMENTARY TAPES, M.D. SUMPTION AND E.W. COLLINGS, N.V. VO, AND S.X. DOU, Prepared for the ICMC, Kitakyushu, Japan, 1996.
60. SUPPRESSION OF EDDY CURRENT LOSS IN BARE-COPPER RUTHERFORD CABLES USING STAINLESS STEEL CORES OF VARIOUS THICKNESSES, E.W. COLLINGS, M.D. SUMPTION, S.W. KIM, M. WAKE, T. SHINTOMI, AND R.M. SCANLAN, Prepared for the ICMC, Kitakyushu, Japan, 1996.
61. FLUX JUMP STABILITY DURING MAGNETIZATION OF BULK YBCO AND INTERNAL MECHANICAL STRESSES IN THE TRAPPED CRITICAL STATE, E.W. COLLINGS AND M.D. SUMPTION, Advances in Superconductivity VII, ed. by K. Yamafuji and T. Morishita (Springer-Verlag, Tokyo 1995) pp. 605-608.
62. BI:2212 MULTIFILAMENTARY ROUND WIRES -- INTRINSIC AND EXTRINSIC Jc LIMITATIONS, COMPARISONS TO MONOCRYSTAL PROPERTIES,M.D. SUMPTION, L.R. MOTOWIDLO, G. OZERYANSKY, G. GALINSKY, AND E.W. COLLINGS, Advances in Superconductivity VII, ed. by K. Yamafuji and T. Morishita (Springer-Verlag, Tokyo 1995) pp. 769-772.
63. INNOVATIVE STRAND DESIGN FOR ACCELERATOR MAGNETS, M.D. SUMPTION AND E.W. COLLINGS, Int. J. Mod. Phys. A (Proc. Suppl.) 2B, 662-664 (1993).
64. MAGNETIC AND PINNING FORCE STUDIES OF TEXTURED FLOAT-ZONE-PROCESSED BULK Bi-Sr-Ca-Cu-O (2212/Ag), Y. HIGASHIDA, K. MICHISHITA, M.D. SUMPTION, AND E.W. COLLINGS, Fifth International Symposium on Superconductivity, ISS'92, Kobe, Japan, 1992 -- to be published.
65. SUPRESSION AND CONTROL OF COUPLING CURRENTS IN STABRITE-COATED RUTHERFORD CABLE WITH CORES OF VARIOUS MATERIALS AND THICKNESSES, E.W. COLLINGS, M.D. SUMPTION, S.W. KIM, M. WAKE, T. SHINTOMI, A. NIJHUIS, H.H.J. TEN KATE, AND R.M. SCANLAN, Presnted at the 1996 Applied Superconductivity Conference.
66. PROXIMITY EFFECT CURRENT STRENGTHS IN NBTI MULTIFILAMENTARY SAMPLES WITH AND WITHOUT NB BARRIERS AND PROCESSED UNDER VARIOUS CONDITIONS, M.D. SUMPTION, AND E.W. COLLINGS, Presented at the 1996 Applied Superconductivity Conference
67. ANALYSIS OF OPTICALLY AND MAGNETICALLY DETERMINED BRIDGING IN INTERNAL-TIN PROCESS Nb3Sn STRANDS, M.D. SUMPTION AND E.W. COLLINGS, E. GULKO, T. PYON, AND E. GREGORYIEEE Trans. Appl. Superconductivity 7 (1997) 1368-1371.
68. FACTORS CONTROLLING THE ONSET OF PROXIMITY EFFECT COUPLING (PEC) AND THE INFLUENCE OF PINNING-ASSISTED PEC ON M-H LOOP ASSYMETRY IN MULTIFILAMENTARY COMPOSITES M.D. SUMPTION, S. TAKACS, AND E.W. COLLINGS, Presented at the ICMC 1997
69. THE DEVELOPMENT OF METALLURGICAL BRIDGING IN THE INTERAL-TIN PROCESS Nb3Sn STRANDS DURING HEAT TREATMENT RAAMP-UPM.D. SUMPTION AND E.W. COLLINGS Presented at the ICMC 97.
70. AC LOSS AND CONTACT RESISTANCE IN Nb3Sn RUTHERFORD CABLES WITH AND WITHOUT A STAINLESS STEEL CORE M.D. SUMPTION, E.W. COLLINGS, R.M. SCANLAN, A. NIJHUIS, AND H.H.J. TEN KATE Presented at the ICMC 97.
71. CRITICAL CURRENTS AND SUPERCONDUCTING BOUNDARY EFFECTS IN S-N-S MULTIFILAMENTARY COMPOSITES M.D. SUMPTION, S. TAKACS, AND E.W. COLLINGS Presented at the ICMC 97.
72. CRITICAL CURRENT DENSITIES IN HETEROGENOUS SUPERCONDUCTORS DETERMINED FROM MAGNETIZATION MEASUREMENTS
M.D. SUMPTION AND S. TAKáCS, Presented at the EUCAS 1997.
73. FLUX PINNING IN THE WEAK LAYERS OF SUPERCONDUCTING HETEROGENEOUS STRUCTURES M.D. SUMPTION AND S. TAKACS Submitted to Physica C, May 1997.
74. DETERMINATION OF THE TRUE (OR POTENTIAL) TRANSPORT-Jc OF A MULTIFILAMENTARY BiHTSC/Ag STRAND IN THE PRESENCE OF BRIDGING AND GENERALIZED SAUSAGING M.D. SUMPTION, L.R. MOTOWIDLO, AND E.W. COLLINGS Submitted to Physica C, May 1997.
75. AC LOSS AND MATRIX RESISTIVITY IN MULTIFILAMENTARY HTSC STRANDS -- ANOMALOUSLY HIGH APPARENT MATRIX RESISTIVITY AND PARTIAL FLUX FLOW MODIFIED EDDY CURRENT LOSS M.D. SUMPTION AND E.W. COLLINGS Submitted to Physica C, June 1997.
76. SURFACE CONDITIONS, CONTACT RESISTANCE, AND AC LOSS IN RUTHERFORD-TYPE CABLES WITH VARIOUS COATINGS AND CORES M.D. SUMPTION, E.W. COLLINGS, R.M. SCANLAN, A. NIJHUIS, H.H.J. TEN KATE, S.W. KIM, M. WAKE, AND T. SHINTOMI, Submitted to Cryogenics 1997.
77. COUPLING URRENT CONTROL IN RUTHERFORD CABLES WOUND WITH NbTi, Nb3Sn, and Bi:2212/Ag M.D. SUMPTION, R.M. SCANLAN, AND E.W. COLLINGS,To be published in Physica C.
78. MELT QUENCHED Nb3Al PROCESSING AND PROPERTIES E.W. COLLINGS, F. BUTA, M.D. SUMPTION, E. GREGORY, AND M. TOMSIC, Presented at the Workshop on Nb3Al Superconductor and its Applications, Tsukuba-shi, Ibaraki, Japan, April 27, 1998.