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pro vyhledávání: '"John F. Schill"'
Publikováno v:
SPIE Proceedings.
Over the past several years we have developed a photo-acoustic spectroscopic (PAS) technique for trace gas detection that is capable of parts per trillion (ppt) detection limits. The desire to reduce the size of the system has led to several efforts
Publikováno v:
SPIE Proceedings.
Photoacoustic spectroscopy (PAS) is a useful monitoring technique that is well suited for trace gas detection. This method routinely exhibits detection limits at the parts-per-million (ppm) or parts-per-billion (ppb) level for gaseous samples. PAS al
Publikováno v:
SPIE Proceedings.
Photoacoustic spectroscopy (PAS) is a useful monitoring technique that is well suited for trace detection of gaseous and condensed media. We have previously demonstrated favorable PAS gas detection characteristics when the system dimensions are scale
Publikováno v:
IEEE Sensors Journal. 15:1336-1337
A theoretical method for predicting the resonant frequencies of acoustic resonators with side branches is introduced. This method is successfully extended to microelectromechanical-scale photoacoustic cell resonators with complex side branch structur
Autor:
John F Schill
A study was done in order to understand the acoustic resonance of narrow cylindrical tubes with side branch holes that are used in photo-acoustic spectrometers. A review of the available literature on the subject lead to an adaptation of electrical t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34991710f84bc25b0b2c1cf0ddf8f2e4
https://doi.org/10.21236/ada577423
https://doi.org/10.21236/ada577423
Autor:
John F. Schill, Andrew J. W. Ogilvy
Publikováno v:
SPIE Proceedings.
The issue of heat transfer in high energy lasers has been a serious problem for years. One valid method of mitigating this problem is the use of low quantum defect solid-state materials operated at cryogenic temperatures 1 . A significant problem exi