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Constraints on Dark Matter Models From a Fermi LAT Search for High-Energy Cosmic-Ray Electrons from the Sun
None
Date:
March 19, 2013
Creator:
Ajello, M.; Atwood, W. B.; Baldini, L.; Barbiellini, G.; Bastieri, D.; Bellazzini, R. et al.
System:
The UNT Digital Library
FEMCAM Analysis of SULTAN Test Results for ITER Nb3SN Cable-conduit Conductors
Performance degradation due to filament fracture of Nb3 Sn cable-in-conduit conductors (CICCs) is a critical issue in large-scale magnet designs such as ITER which is currently being constructed in the South of France. The critical current observed in most SULTAN TF CICC samples is significantly lower than expected and the voltage-current characteristic is seen to have a much broader transition from a single strand to the CICC. Moreover, most conductors exhibit the irreversible degradation due to filament fracture and strain relaxation under electromagnetic cyclic loading. With recent success in monitoring thermal strain distribution and its evolution under the electromagnetic cyclic loading from in situ measurement of critical temperature, we apply FEMCAM which includes strand filament breakage and local current sharing effects to SULTAN tested CICCs to study Nb3 Sn strain sensitivity and irreversible performance degradation. FEMCAM combines the thermal bending effect during cool down and the EM bending effect due to locally accumulating Lorentz force during magnet operation. It also includes strand filament fracture and related local current sharing for the calculation of cable n value. In this paper, we model continuous performance degradation under EM cyclic loading based on strain relaxation and the transition broadening upon cyclic loading to …
Date:
March 19, 2013
Creator:
Yuhu Zhai, Pierluigi Bruzzone, Ciro Calzolaio
System:
The UNT Digital Library
Is the Transition Redshift a New Cosmological Number?
None
Date:
March 19, 2013
Creator:
Lima, J. A. S.; Jesus, J. F.; Santos, R. C. & Gill, M. S. S.
System:
The UNT Digital Library
Confronting Tracker Field Quintessence with Data
None
Date:
March 19, 2013
Creator:
Wang, Pao-Yu; /Taiwan, Natl. Taiwan U.; Chen, Chien-Wen; /NCTS, Taipei; Chen, Pisin & /KIPAC, Menlo Park /Taiwan, Natl. Taiwan U.
System:
The UNT Digital Library