Zobrazeno 1 - 10
of 52
pro vyhledávání: '"H.G. Lipson"'
Autor:
P. Zecchini, H.G. Lipson
Publikováno v:
Proceedings of the 43rd Annual Symposium on Frequency Control.
Infrared and 632.7 nm laser absorption measurements have been used to characterize changes in aluminum compensation for irradiated and air-swept cultured and natural quartz. These measurements demonstrated irradiation dose effects and the competition
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22197ffc9721f06f0a0a7e9e9d4dd832
https://doi.org/10.1109/freq.1989.68908
https://doi.org/10.1109/freq.1989.68908
Autor:
H.G. Lipson, F. Euler
Publikováno v:
Proceedings of the 42nd Annual Frequency Control Symposium, 1988..
Results are presented on the dose-rate dependence of the principal centers involved in the irradiation process. This investigation covers cultured quartz samples with a range of grown-in OH and aluminum centers. Acoustic loss measurements have been u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20cd6d6b7bf6203f442c52ef6fa6081d
https://doi.org/10.1109/freq.1988.27598
https://doi.org/10.1109/freq.1988.27598
Autor:
H.G. Lipson
Optical absorption at He-Ne and argon laser frequencies has been used to map the distribution of aluminium-hole centres, Al-H/sup +/, in irradiated and vacuum swept quartz. The absorption band associated with Al-h/sup +/ has a strong peak centered at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a44a9eefcc74159a9ccd4557f49b650
https://zenodo.org/record/1262099
https://zenodo.org/record/1262099
Publikováno v:
Journal of Non-Crystalline Solids. 17:27-43
Absorption and fluorescence spectra are presented for neodymium-doped alkali germanate and bismuth germanate glasses and crystals. Narrower spectral components and a shift in intensity distribution toward shorter wavelengths for the composite bands c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1213b334ff3b24f58e433becbf3ad898
https://doi.org/10.1016/0022-3093(75)90111-8
https://doi.org/10.1016/0022-3093(75)90111-8
Publikováno v:
Journal of Crystal Growth. 60:136-140
Single crystal quartz grown using low concentrations of sodium has been shown to contain exceedingly high concentrations of aluminum. Other properties of the quartz are also affected. It is possible that the growth mechanism has been changed. The sou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95abd33cc9f749c35f0d803f5bee9242
https://doi.org/10.1016/0022-0248(82)90182-8
https://doi.org/10.1016/0022-0248(82)90182-8
Autor:
H.G. Lipson, A.F. Armington
Publikováno v:
Journal of Crystal Growth. 80:51-59
Low temperature infrared absorption scans and irradiation coloration are used to determine OH - , Al-OH - and aluminum-hole distributions in X and Z growth regions of cultured quartz grown from + X and Z seeds. The aluminum profile across the crystal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a3faa53128c4ef1a64f2fcfe508508b
https://doi.org/10.1016/0022-0248(87)90522-7
https://doi.org/10.1016/0022-0248(87)90522-7
Publikováno v:
32nd Annual Symposium on Frequency Control.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7e57056bae4c7e50c7a244b454e14d3
https://doi.org/10.1109/freq.1978.200216
https://doi.org/10.1109/freq.1978.200216
Publikováno v:
Thirty Fifth Annual Frequency Control Symposium.
Summary We report the results of electrical resistance at series resonance as a measure of acoustic loss between 150 and 350 OC for resonators fabricated from high grade synthetic and electrolyzed (swept) quartz. An exponential increase of resonator
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::926ee7f6061d3ed4a0c481adc728ed31
https://doi.org/10.1109/freq.1981.200493
https://doi.org/10.1109/freq.1981.200493
Publikováno v:
36th Annual Symposium on Frequency Control.
We report acoustic loss measurements from room temperature to above 500 degrees of C on resonator disks fabricated from high-grade as-grown and swept synthetic quartz, containing both Li(+) and Na(+) alkali impurities. As-grown quartz disks showed an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ca01ea13c8c3fa1d42515b07c9ed7f8
https://doi.org/10.1109/freq.1982.200560
https://doi.org/10.1109/freq.1982.200560
Autor:
A. Kahan, H.G. Lipson
Publikováno v:
39th Annual Symposium on Frequency Control.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0599d34185dd219d33a915d18b5dc4ba
https://doi.org/10.1109/freq.1985.200852
https://doi.org/10.1109/freq.1985.200852