Zobrazeno 1 - 10
of 1 791
pro vyhledávání: '"Barber S"'
Autor:
De Chant, J. T., Nakamura, K., Ji, Q., Obst-Huebl, L., Barber, S., Snijders, A. M., Geddes, C. G. R., van Tilborg, J., Gonsalves, A. J., Schroeder, C. B., Esarey, E.
Laser-driven (LD) ion acceleration has been explored in a newly constructed short focal length beamline at the BELLA petawatt facility (interaction point 2, iP2). For applications utilizing such LD ion beams, a beam transport system is required, whic
Externí odkaz:
http://arxiv.org/abs/2411.03543
Autor:
Röckemann, J. -H., Schaper, L., Barber, S. K., Bobrova, N. A., Boyle, G., Bulanov, S., Delbos, N., Floettmann, K., Kube, G., Lauth, W., Leemans, W. P., Libov, V., Maier, A., Meisel, M., Messner, P., Sasorov, P. V., Schroeder, C. B., van Tilborg, J., Wesch, S., Osterhoff, J.
Publikováno v:
Phys. Rev. Accel. Beams 21, 122801 (2018)
Active plasma lenses have the potential to enable broad-ranging applications of plasma-based accelerators owing to their compact design and radially symmetric kT/m-level focusing fields, facilitating beam-quality preservation and compact beam transpo
Externí odkaz:
http://arxiv.org/abs/1803.06663
Autor:
Bagdasarov, G. A., Bobrova, N. A., Boldarev, A. S., Olkhovskaya, O. G., Sasorov, P. V., Gasilov, V. A., Barber, S. K., Bulanov, S. S., Gonsalves, A. J., Schroeder, C. B., van Tilborg, J., Esarey, E., Leemans, W. P., Levato, T., Margarone, D., Korn, G., Kando, M., Bulanov, S. V.
A method for the asymmetric focusing of electron bunches, based on the active plasma lensing technique is proposed. This method takes advantage of the strong inhomogeneous magnetic field generated inside the capillary discharge plasma to focus the ul
Externí odkaz:
http://arxiv.org/abs/1710.07701
Autor:
Brugger, B., Mousis, O., Morse, A., Marboeuf, U., Jorda, L., Guilbert-Lepoutre, A., Andrews, D., Barber, S., Lamy, P., Luspay-Kuti, A., Mandt, K., Morgan, G., Sheridan, S., Vernazza, P., Wright, I. P.
On November 12, 2014, the ESA/Rosetta descent module Philae landed on the Abydos site of comet 67P/Churyumov-Gerasimenko. Aboard this module, the Ptolemy mass spectrometer measured a CO/CO2 ratio of 0.07 +/- 0.04 which differs substantially from the
Externí odkaz:
http://arxiv.org/abs/1603.05893
Publikováno v:
Journal of Vacuum Science and Technology B 29, 041804 (2011)
The integration of a scanning tunneling microscope chamber with a sample growth facility using non-custom, commercially available parts is described. The facility also features a newly-designed magnetic wobble stick to increase the reliability of sam
Externí odkaz:
http://arxiv.org/abs/1502.03460
Publikováno v:
Journal of Crystal Growth 327, 42-45 (2011)
Mn-doped GaAs thin films were grown at a high substrate temperature of 580 C. During the growth process, the Mn cell temperature was ramped at different rates, resulting in a variety of different Mn concentration depth profile slopes, as measured usi
Externí odkaz:
http://arxiv.org/abs/1502.02967
Autor:
Xu, P., Yang, Y., Barber, S. D., Ackerman, M. L., Schoelz, J. K., Kornev, I. A., Barraza-Lopez, S., Bellaiche, L., Thibado, P. M.
Publikováno v:
Physical Review B 84, 161409(R) (2011)
In this work, systematic constant-bias, variable-current scanning tunneling microscopy (STM) measurements and STM simulations from density-functional theory are made, yielding critical insights into the spatial structure of electrons in graphene. A f
Externí odkaz:
http://arxiv.org/abs/1502.02568
Autor:
Xu, P., Yang, Y., Barber, S. D., Ackerman, M. L., Schoelz, J. K., Qi, D., Kornev, I. A., Dong, L., Bellaiche, L., Barraza-Lopez, S., Thibado, P. M.
Publikováno v:
Physical Review B 85, 121406(R) (2012)
In this study, we describe a new experimental approach based on constant-current scanning tunneling spectroscopy to controllably and reversibly pull freestanding graphene membranes up to 35 nm from their equilibrium height. In addition, we present sc
Externí odkaz:
http://arxiv.org/abs/1502.01931
Autor:
Schoelz, J. K., Xu, P., Barber, S. D., Qi, D., Ackerman, M. L., Basnet, G., Cook, C. T., Thibado, P. M.
Publikováno v:
Journal of Vacuum Science and Technology B 30, 033201 (2012)
A custom double-lamella method is presented for electrochemically etching tungsten wire for use as tips in scanning tunneling microscopy (STM). For comparison, tips were also manufactured in-house using numerous conventional methods and examined usin
Externí odkaz:
http://arxiv.org/abs/1502.01641
A Pathway between Bernal and Rhombohedral Stacked Graphene Layers with Scanning Tunneling Microscopy
Autor:
Xu, P., Yang, Y., Qi, D., Barber, S. D., Ackerman, M. L., Schoelz, J. K., Bothwell, T. B., Barraza-Lopez, S., Bellaiche, L., Thibado, P. M.
Publikováno v:
Applied Physics Letters 100, 201601 (2012)
Horizontal shifts in the top layer of highly oriented pyrolytic graphite, induced by a scanning tunneling microscope (STM) tip, are presented. Excellent agreement is found between STM images and those simulated using density functional theory. First-
Externí odkaz:
http://arxiv.org/abs/1502.01239