Zobrazeno 1 - 10
of 22
pro vyhledávání: '"J. J. Donaghy"'
Autor:
K. E. van Ness, M.E. Thompson, D. C. Cassada, Thomas J. Nosker, J. J. Donaghy, Richard W. Renfree, D. R. Morrow
Publikováno v:
Physica Status Solidi (a). 124:67-74
Positron lifetimes and intensities are used to characterize the microstructure of products made from the blending of recycled plastics: post-industrial polystyrene and post-consumer high density polyethylene. For samples of various compositions, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8cfc15fcc7e4579dde69b160fa0dbf30
https://doi.org/10.1002/pssa.2211240104
https://doi.org/10.1002/pssa.2211240104
Autor:
J. H. Whealton, C. C. Tsai, H. H. Haselton, W. K. Dagenhart, M. A. Akerman, J. J. Donaghy, W. L. Stirling, W. R. Becraft, D. E. Schechter
Publikováno v:
Review of Scientific Instruments. 61:783-787
The emittances of hydrogen and deuterium negative ion beams produced by volume ion sources have been measured in a transverse plane normal to the beam trajectory. The extraction voltage was varied from 10 to 40 kV, and the transverse magnetic field i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88a00ae76964a84cf8a703eb25c0904d
https://doi.org/10.1063/1.1141494
https://doi.org/10.1063/1.1141494
Publikováno v:
Nature. 350:563-563
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb3d6dcc997f897cca16c33410dd56d1
https://doi.org/10.1038/350563a0
https://doi.org/10.1038/350563a0
Autor:
K. E. van Ness, J. J. Donaghy
Publikováno v:
Physica Status Solidi (a). 116:K213-K217
On applique le modele de piegeage a un ensemble de donnees du temps de vie des positons du polytetrafluoroethylene (PTFE). Ajustement a quatre exponentielles pour la determination des parametres du modele de piegeage
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cde089a4c7d43d8bb6745afd46d6f88
https://doi.org/10.1002/pssa.2211160263
https://doi.org/10.1002/pssa.2211160263
Autor:
J. J. Donaghy, A. T. Stewart
Publikováno v:
Physical Review. 164:391-395
The angular correlation of radiation from positrons annihilating in lithium single crystals has been measured. The crystals were oriented in the [100], [110], and [111] directions, and the measurements yield information closely related to the areas o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2d743469267a2f5eaf6b2439ace93fd
https://doi.org/10.1103/physrev.164.391
https://doi.org/10.1103/physrev.164.391
Autor:
A. T. Stewart, J. J. Donaghy
Publikováno v:
Physical Review. 164:396-398
Experimental data from positron annihilation in sodium single crystals show (a) that the Fermi surface is spherical and (b) that the momentum dependence of the "enhancement factor" of the polarization of the electron sea by the positron agrees with c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3ed175f624af61f0267e7eb0049604d
https://doi.org/10.1103/physrev.164.396
https://doi.org/10.1103/physrev.164.396
Autor:
P. M. Ryan, W. L. Stirling, W. K. Dagenhart, J. H. Whealton, C. C. Tsai, J. J. Donaghy, D. E. Schechter
Publikováno v:
AIP Conference Proceedings.
Beam parameters have been measured for both the Surface Ionization with Transverse Extraction (SITEX) and Volume Ionization with Transverse Extraction (VITEX) H−/D− ion sources. Both sources use a reflex discharge to generate the main plasma. Bea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4d66c0bf1c6d31c623ff12a69bafe29
https://doi.org/10.1063/1.36550
https://doi.org/10.1063/1.36550
Autor:
W. K. Dagenhart, J. H. Whealton, H. H. Haselton, P. M. Ryan, W. L. Stirling, C.C. Tsai, J. J. Donaghy, G. C. Barber, D. E. Schechter
Publikováno v:
AIP Conference Proceedings.
Surface ionization with Transverse Extraction (SITEX) and Volume Ionization with Transverse Extraction (VITEX) ion sources are being developed to produce intense beams of light negative ions for neutral particle beam applications. The salient feature
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0db2b286d8eb9d385b5004fe50ebf3c7
https://doi.org/10.1063/1.36533
https://doi.org/10.1063/1.36533
Publikováno v:
AIP Conference Proceedings.
An emittance measurement employing two techniques are being made on SITEX. To this end, a 2-D calculation was performed to design the accelerator in order to reduce electric field abberations. The calculated normalized emittance is 6 x 10/sup -4/ IIc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6baa98b58d2855df3fa1575fa69ad912
https://doi.org/10.1063/1.34371
https://doi.org/10.1063/1.34371