Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Larry D. Gardner"'
Autor:
John C. Raymond, Rajmal Jain, Leonard Strachan, Steven R. Cranmer, Anil K. Pradhan, Larry D. Gardner, John L. Kohl
Publikováno v:
Journal of Astrophysics and Astronomy. 29:321-327
Ultraviolet coronagraph observations of the extended solar corona (defined here as 1.5 to 10 solar radii from Sun-center) have become a powerful tool for obtaining detailed empirical descriptions of coronal holes, streamers, and coronal mass ejection
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a4b7f568c401b990535d871a092fa47
https://doi.org/10.1007/s12036-008-0042-x
https://doi.org/10.1007/s12036-008-0042-x
Autor:
Mari-Paz Miralles, John C. Raymond, Peter L. Smith, John L. Kohl, Bogdan Valcu, Larry D. Gardner
Publikováno v:
Solar Physics. 243:93-104
We have tracked the spectral responsivity of the ultraviolet channels of the UVCS (Ultraviolet Coronagraph Spectrometer) instrument on SOHO by repeated observations of a stable hot star. We demonstrate first that the ultraviolet spectral irradiance o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b42f29843120dd95a76af6cd058e176e
https://doi.org/10.1007/s11207-007-0377-5
https://doi.org/10.1007/s11207-007-0377-5
Publikováno v:
Physical Review A. 60:1153-1164
We have measured the absolute cross section for electron-impact excitation (EIE) of ${\mathrm{Si}}^{2+}{(3s}^{2}{}^{1}\stackrel{\ensuremath{\rightarrow}}{S}3s3p{}^{1}P)$ from energies below threshold to 11 eV above. A beams modulation technique with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba1488475231904c5d605d72290a6875
https://doi.org/10.1103/physreva.60.1153
https://doi.org/10.1103/physreva.60.1153
Autor:
D. B. Reisenfeld, P. H. Janzen, Larry D. Gardner, K. Bartschat, Daniel Wolf Savin, John L. Kohl
Publikováno v:
Physical Review A. 59:4821-4824
Experimental absolute-rate coefficients for electron-impact excitation of C (2s S1/2→2p P1/2,3/2) near threshold @D. W. Savin, L. D. Gardner, D. B. Reisenfeld, A. R. Young, and J. L. Kohl, Phys. Rev. A 51, 2162 ~1995!# have been reanalyzed to inclu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::debf9c01d989eeb332828c9ce476c598
https://doi.org/10.1103/physreva.59.4821
https://doi.org/10.1103/physreva.59.4821
Publikováno v:
Review of Scientific Instruments. 66:67-71
A technique has been developed to determine the absolute single particle counting efficiency of a channel electron multiplier (CEM) for positively charged ions at keV energies. The calibration technique is applicable to positive ion detectors in gene
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebf389d44b5537980251970ccde587d9
https://doi.org/10.1063/1.1146531
https://doi.org/10.1063/1.1146531
Publikováno v:
Applied optics. 32(19)
An analysis of stray-light suppression in the white-light channel of the Ultraviolet Coronagraph Spectrometer experiment for the Solar and Heliospheric Observatory is reported. The white-light channel consists of a reflecting telescope with external
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ac2a7755fbc2f0aaad840a9dc1e5b41
https://pubmed.ncbi.nlm.nih.gov/20829981
https://pubmed.ncbi.nlm.nih.gov/20829981
We present a detailed model of stray-light suppression in the spectrometer channels of the Ultraviolet Coronagraph Spectrometer (UVCS) on the SOHO spacecraft. The control of diffracted and scattered stray light from the bright solar disk is one of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c4ef649d0d7c09b1f129d7b748f261d
Publikováno v:
Physical Review A. 73
We have measured the absolute energy-averaged cross section for the electron impact excitation of ${\mathrm{C}}^{2+}(2s2p\phantom{\rule{0.2em}{0ex}}^{3}P^{o}\ensuremath{\rightarrow}2{p}^{2}\phantom{\rule{0.2em}{0ex}}^{3}P)$ from energies below thresh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7048e692f561a3150c62d643cc98ad3
https://doi.org/10.1103/physreva.73.032709
https://doi.org/10.1103/physreva.73.032709
Publikováno v:
Physical Review A. 67
We have measured the absolute energy-averaged cross section for electron-impact excitation of Si{sup 2+}(3s3p {sup 3}P{sup o}{yields}3s3p {sup 1}P{sup o}) from energies below threshold to the turn-on of the 3s3p {sup 3}P{sup o}{yields}3p{sup 2} {sup
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2468e8e204c43632fa544f64371d976e
https://doi.org/10.1103/physreva.67.052702
https://doi.org/10.1103/physreva.67.052702
Autor:
Joseph M. Davila, Peter Daigneau, Peter L. Smith, Silvano Fineschi, Giancarlo Noci, Marco Romoli, John L. Kohl, Dennis G. Socker, Larry D. Gardner, Russell A. Howard, Leonard Strachan
Publikováno v:
SPIE Proceedings.
The Advanced Spectroscopic and Coronagraphic Explorer (ASCE) was proposed in 2001 to NASA's Medium-Class Explorer (MIDEX) program by the Smithsonian Astrophysical Observatory in collaboration with the Naval Research Laboratory, Goddard Space Flight C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b30ea1a2411deaf7516d5d9fe57fda7f
https://doi.org/10.1117/12.466139
https://doi.org/10.1117/12.466139