Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Winthrop Smith"'
Publikováno v:
SSRN Electronic Journal.
We characterize the long-run stable maturity distribution induced by a fixed issuance policy, defined as the maturity mix of new issues, thereby providing a method to link issuance policies with their long-run consequences. We derive closed-form expr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::586c7e9a115cd416bb7613a18d35b3e4
https://doi.org/10.2139/ssrn.3547079
https://doi.org/10.2139/ssrn.3547079
Autor:
Jonathan Kwolek, Winthrop Smith, S. A. Entner, D. S. Goodman, Francesco Narducci, James D. Wells
We present model-independent measurements of the excited-state population of atoms in a sodium (Na) magneto-optical trap (MOT) using a hybrid ion-neutral trap composed of a MOT and a linear Paul trap (LPT). We photoionize excited Na atoms trapped in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7af9e77b19503ef8fe60c2b9c59e547b
http://arxiv.org/abs/1802.05306
http://arxiv.org/abs/1802.05306
Publikováno v:
SSRN Electronic Journal.
We characterize the long-run stable maturity distribution induced by a fixed issuance policy, defined as the maturity mix of new issues, thereby providing a method to link issuance policies with their long-run consequences. We derive closed-form expr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::376ec7526bcf51b73e32840f054b2e57
https://doi.org/10.2139/ssrn.3300347
https://doi.org/10.2139/ssrn.3300347
Autor:
Reinhold Blümel, D. S. Goodman, Winthrop Smith, B. Slayton, Frank A. Narducci, James D. Wells, Jonathan Kwolek
We present measurements of the charge-exchange reaction rate between neutral sodium (Na) and ionized calcium (\ce{Ca+}) in a hybrid atom-ion trap, which is comprised of a Na magneto-optical trap concentric with a linear Paul trap. Once the Na and \ce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d4864c9ff1d5f191377acda357ceffa
We present experimental measurements of the steady-state ion number in a linear Paul trap (LPT) as a function of the ion-loading rate. These measurements, taken with (a) constant Paul trap stability parameter $q$, (b) constant radio-frequency (rf) am
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41bd5d4a4fc48b478700ae5d400c528e
Autor:
Sandipan Banerjee, Robin Côté, Winthrop Smith, H. Harvey Michels, D. S. Goodman, J. A. Mongtomery, James D. Wells, Frank A. Narducci, I. Sivarajah
Publikováno v:
Applied Physics B. 114:75-80
Due to their large trap depths (∼1 eV or 10,000 K), versatility, and ease of construction, Paul traps have important uses in high-resolution spectroscopy, plasma physics, and precision measurements of fundamental constants. An ion-neutral hybrid tr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::305a16d3d598dffaff08f21d3892d91e
https://doi.org/10.1007/s00340-013-5672-2
https://doi.org/10.1007/s00340-013-5672-2
Autor:
A. Wrigley, Q. C. Kessel, S. Hossain, Winthrop Smith, K. Miller, S. J. Smith, C.J. Verzani, Ara Chutjian
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 261:189-192
Laboratory measurements simulating the impact of certain solar wind ions on CO have been made. Preliminary analysis of the X rays in the 50–300 eV energy range produced by these collisions suggests that a dominant role is played by electron capture
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13978c1e6f8041b436e74f1aea720c4a
https://doi.org/10.1016/j.nimb.2007.04.012
https://doi.org/10.1016/j.nimb.2007.04.012
Autor:
D. S. Goodman, Reinhold Blümel, Jonathan Kwolek, F.A. Narducci, James D. Wells, Winthrop Smith
Publikováno v:
Physical Review A. 91
to be 7.4 ± 1.9 × 10 8 cm 3 /s for the type I Na MOT immersed within an � 140 K ion cloud and 1.10±0.25×10 7 cm 3 /s for the type II Na MOT within an � 1070 K ion cloud. Our measurements show excellent agreement with previously reported theor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4bd6e1327ff414089ebdb7f504f25816
https://doi.org/10.1103/physreva.91.012709
https://doi.org/10.1103/physreva.91.012709
Autor:
S. J. Smith, Q. C. Kessel, N. Djuric, Winthrop Smith, J. A. Lozano, K. Miller, P. Gee, Thomas Ehrenreich, E. Pollack, Ara Chutjian
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 241:125-128
As part of an investigation of the interactions between solar-wind ions and cometary gases, UV/X-ray and optical measurements of the photons resulting from collisions of O5+ with CO have been made. Although O5+ is not a major solar-wind ion, its inte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::304261579ef8af1fbf83178354936c9b
https://doi.org/10.1016/j.nimb.2005.07.075
https://doi.org/10.1016/j.nimb.2005.07.075
Publikováno v:
Journal of Modern Optics. 52:2253-2260
A dual hybrid ion–neutral trap has been built to study collisions between a cloud of ultracold atoms and small numbers of co-trapped atomic or molecular ions, in a common volume. Ultracold Na atoms are trapped in a vapour-cell magneto-optical trap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad6ca4b24a3b170df835b02b24a02ba3
https://doi.org/10.1080/09500340500275850
https://doi.org/10.1080/09500340500275850