Intensified Charge-Coupled-Device Cameras For A Spatially Resolving Extreme Ultraviolet Spectrometer

1987 ◽  
Vol 26 (8) ◽  
Author(s):  
D. Content ◽  
M. Perry ◽  
D. Wroblewski ◽  
H. W. Moos
Keyword(s):  
Extreme Ultraviolet ◽  
Charge Coupled Device ◽  
Intensified Charge Coupled Device ◽  
Ultraviolet Spectrometer

Soft X-ray continuum radiation from low-energy pinch discharges of hydrogen

2013 ◽  
Vol 79 (5) ◽  
pp. 489-507 ◽  
Author(s):  
R. MILLS ◽  
R. BOOKER ◽  
Y. LU
Keyword(s):  
Extreme Ultraviolet ◽  
Low Energy ◽  
Pure Hydrogen ◽  
Charge Coupled Device ◽  
Energetic Ions ◽  
Continuum Radiation ◽  
High Kinetic Energy ◽  
Extreme Ultraviolet Radiation ◽  
Electrode Metal ◽  
Detector Chamber

AbstractUnder a study contracted by GEN3 Partners, spectra of high current pinch discharges in pure hydrogen and helium were recorded in the extreme ultraviolet radiation region at the Harvard Smithsonian Center for Astrophysics (CfA) in an attempt to reproduce experimental results published by BlackLight Power, Inc. (BLP) showing predicted continuum radiation due to hydrogen in the 10–30 nm region (Mills, R. L. and Lu, Y. 2010 Hydrino continuum transitions with cutoffs at 22.8 nm and 10.1 nm. Int. J. Hydrog. Energy35, 8446–8456, doi:10.1016?j.ijhydene.2010.05.098). Alternative explanations were considered to the claimed interpretation of the continuum radiation as being that emitted during transitions of H to lower-energy states (hydrinos). Continuum radiation was observed at CfA in the 10–30 nm region that matched BLP's results. Considering the low energy of 5.2 J per pulse, the observed radiation in the energy range of about 120–40 eV, reference experiments and analysis of plasma gases, cryofiltration to remove contaminants, and spectra of the electrode metal, no conventional explanation was found in the prior or present work to be plausible including contaminants, electrode metal emission, and Bremsstrahlung, ion recombination, molecular or molecular ion band radiation, and instrument artifacts involving radicals and energetic ions reacting at the charge-coupled device and H2 re-radiation at the detector chamber. Moreover, predicted selective extraordinarily high-kinetic energy H was observed by the corresponding Doppler broadening of the Balmer α line.

Observation of Atom and Ion Clouds Produced from Single Droplets of Sample in Inductively Coupled Plasmas by Optical Emission and Laser-Induced Fluorescence Imaging

1997 ◽  
Vol 51 (5) ◽  
pp. 607-616 ◽  
Author(s):  
John W. Olesik ◽  
Jeffery A. Kinzer ◽  
Garrett J. McGowan
Keyword(s):  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Laser Induced Fluorescence ◽  
Inductively Coupled Plasmas ◽  
Double Exposure ◽  
Charge Coupled Device ◽  
Inductively Coupled ◽  
Intensified Charge Coupled Device ◽  
Coupled Plasmas ◽  
Single Droplets

An instrument to obtain optical emission and laser-induced fluorescence images of atom or ion clouds, each produced from isolated, monodisperse droplets of sample in an inductively coupled plasma, is described. An excimer laser pumped dye laser is used to produce a large (28-mm × 24-mm) beam for saturated fluorescence from atoms or ions throughout a large portion of the ICP. An intensified charge-coupled device (ICCD) detects optical emission or laser induced fluorescence snapshot images at the focal plane of an aberration-corrected slitless spectrograph. Images produced from a single laser pulse can be detected. Double-exposure emission images with 1-μs gate times can be acquired to monitor the movement of atom or ion clouds produced from a single droplet of sample solution. Variations in the number of atoms or ions produced as a function of time (or height) in the plasma can be monitored. Excitation in the plasma can be assessed from ratios of emission to fluorescence intensities.

scholarly journals Sensitive In Situ Monitoring of a Recombinant Bioluminescent Yersinia enterocolitica Reporter Mutant in Real Time on Camembert Cheese

2002 ◽  
Vol 68 (11) ◽  
pp. 5737-5740 ◽  
Author(s):  
Ariel Maoz ◽  
Ralf Mayr ◽  
Geraldine Bresolin ◽  
Klaus Neuhaus ◽  
Kevin P. Francis ◽  
...  
Keyword(s):  
Real Time ◽  
Yersinia Enterocolitica ◽  
Photon Emission ◽  
Photon Counting ◽  
In Situ Monitoring ◽  
Charge Coupled Device ◽  
Reading Frame ◽  
Intensified Charge Coupled Device ◽  
Camembert Cheese

ABSTRACT Bioluminescent mutants of Yersinia enterocolitica were generated by transposon mutagenesis using a promoterless, complete lux operon (luxCDABE) derived from Photorhabdus luminescens, and their production of light in the cheese environment was monitored. Mutant B94, which had the lux cassette inserted into an open reading frame of unknown function was used for direct monitoring of Y. enterocolitica cells on cheeses stored at 10°C by quantifying bioluminescence using a photon-counting, intensified charge-coupled device camera. The detection limit on cheese was 200 CFU/cm2. Bioluminescence of the reporter mutant was significantly regulated by its environment (NaCl, temperature, and cheese), as well as by growth phase, via the promoter the lux operon had acquired upon transposition. At low temperatures, mutant B94 did not exhibit the often-reported decrease of photon emission in older cells. It was not necessary to include either antibiotics or aldehyde in the food matrix in order to gain quantitative, reproducible bioluminescence data. As far as we know, this is the first time a pathogen has been monitored in situ, in real time, in a “real-product” status, and at a low temperature.

scholarly journals Absolute sensitivity calibration of an extreme ultraviolet spectrometer for tokamak measurements

2017 ◽  
Vol 12 (01) ◽  
pp. P01006-P01006 ◽  
Author(s):  
R. Guirlet ◽  
J.L. Schwob ◽  
O. Meyer ◽  
S. Vartanian
Keyword(s):  
Extreme Ultraviolet ◽  
Absolute Sensitivity ◽  
Ultraviolet Spectrometer

A HIGH EFFICIENCY IMAGING EXTREME ULTRAVIOLET SPECTROMETER

1991 ◽  
pp. 380-389
Author(s):  
JEFFREY S. MORGAN ◽  
J. GETHYN TIMOTHY ◽  
DAVID C. SLATER ◽  
MARTIN C.E. HUBER ◽  
GIUSEPPE TONDELLO ◽  
...  
Keyword(s):  
High Efficiency ◽  
Extreme Ultraviolet ◽  
Ultraviolet Spectrometer
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