Zobrazeno 1 - 10
of 149
pro vyhledávání: '"Cooley, L D"'
Autor:
Belomestnykh, S., Posen, S., Bafia, D., Balachandran, S., Bertucci, M., Burrill, A., Cano, A., Checchin, M., Ciovati, G., Cooley, L. D., Semione, G. Dalla Lana, Delayen, J., Eremeev, G., Furuta, F., Gerigk, F., Giaccone, B., Gonnella, D., Grassellino, A., Gurevich, A., Hillert, W., Iavarone, M., Knobloch, J., Kubo, T., Kwok, W. K., Laxdal, R., Lee, P. J., Liepe, M., Martinello, M., Melnychuk, O. S., Nassiri, A., Netepenko, A., Padamsee, H., Pagani, C., Paparella, R., Pudasaini, U., Reece, C. E., Reschke, D., Romanenko, A., Ross, M., Saito, K., Sauls, J., Seidman, D. N., Solyak, N., Sung, Z., Umemori, K., Valente-Feliciano, A. -M., Delsolaro, W. Venturini, Walker, N., Weise, H., Welp, U., Wenskat, M., Wu, G., Xi, X. X., Yakovlev, V., Yamamoto, A., Zasadzinski, J.
Radio frequency superconductivity is a cornerstone technology for many future HEP particle accelerators and experiments from colliders to proton drivers for neutrino facilities to searches for dark matter. While the performance of superconducting RF
Externí odkaz:
http://arxiv.org/abs/2204.01178
Autor:
Cao, C., Tao, R., Ford, D. C., Klie, R. F., Proslier, T., Cooley, L. D., Dzyuba, A., Zapol, P., Warren, M., Lind, H., Zasadzinski, J. F.
Publikováno v:
Phys. Rev. B 91, 094302 (2015)
High purity niobium (Nb), subjected to the processing methods used in the fabrication of superconducting RF cavities, displays micron-sized surface patches containing excess carbon. High-resolution transmission electron microscopy and electron energy
Externí odkaz:
http://arxiv.org/abs/1503.02733
Autor:
Grassellino, A., Romanenko, A., Crawford, A., Melnychuk, O., Rowe, A., Wong, M., Cooper, C., Sergatskov, D., Bice, D., Trenikhina, Y., Cooley, L. D., Ginsburg, C., Kephart, R. D.
We investigate the effect of high temperature treatments followed by only high-pressure water rinse (HPR) of superconducting radio frequency (SRF) niobium cavities. The objective is to provide a cost effective alternative to the typical cavity proces
Externí odkaz:
http://arxiv.org/abs/1305.2182
Publikováno v:
Supercond. Sci. Technol. 26 (2013) 035003
Many modern and proposed future particle accelerators rely on superconducting radio frequency cavities made of bulk niobium as primary particle accelerating structures. Such cavities suffer from the anomalous field dependence of their quality factors
Externí odkaz:
http://arxiv.org/abs/1212.3384
A model for the onset of the reduction in SRF cavity quality factor, the so-called Q-drop, at high accelerating electric fields is presented. Breakdown of the surface barrier against magnetic flux penetration at the cavity equator is considered to be
Externí odkaz:
http://arxiv.org/abs/1007.2561
Nb3Sn was prepared by milling Nb and Sn powder mixtures followed by limited reactions to restrict disorder recovery. Although disorder reduced the superconducting critical temperature Tc, the concomitant electron scattering increased the upper critic
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511560
The electronic structure of electron-doped polycrystalline Mg$_{1-x}$Al$_{x}$(B$_{1-y}$C$_{y}$)$_2$ was examined by electron energy-loss spectroscopy (EELS) in a scanning transmission electron microscope (STEM) and first-principle electronic structur
Externí odkaz:
http://arxiv.org/abs/cond-mat/0510002
(Abridged abstract) Alloyed MgB2 differs from pure forms in that diffusion is needed to distribute the alloying elements homogeneously. Williamson-Hall analyses of x-ray diffraction peaks showed that Mg1-xAlxB2 samples made by a typical reaction A ha
Externí odkaz:
http://arxiv.org/abs/cond-mat/0507041
Electron energy-loss spectroscopy (EELS) was combined with heat capacity measurements to follow the change of superconductivity with systematic Al doping of MgB$_2$. By using x-ray diffraction and Vegard's law to assess the actual Al content in the s
Externí odkaz:
http://arxiv.org/abs/cond-mat/0504463
Formation of MgB2 by reactions of Mg with B6Si and Mg with B were compared, the former also producing Mg2Si as a major product. Compared to the binary system, the ternary reactions for identical time and temperature were more complete at 750 C and be
Externí odkaz:
http://arxiv.org/abs/cond-mat/0403130