Experimental studies of ion flow near the sheath edge in multiple ion species plasma including argon, xenon and neon

2017 ◽  
Vol 26 (5) ◽  
pp. 055021 ◽  
Author(s):  
Greg Severn ◽  
Chi-Shung Yip ◽  
Noah Hershkowitz ◽  
Scott D Baalrud
Keyword(s):  
Experimental Studies ◽  
Ion Flow ◽  
Sheath Edge ◽  
Ion Species

scholarly journals Laboratory Studies of Ion Chemistry in the Interstellar Medium

2013 ◽  
Vol 9 (S297) ◽  
pp. 258-264 ◽  
Author(s):  
V. M. Bierbaum
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ion Trap ◽  
Experimental Studies ◽  
Negative Ions ◽  
Carbon Chain ◽  
Ion Chemistry ◽  
Ion Flow ◽  
Polycyclic Aromatic ◽  
Selected Ion Flow Tube ◽  
Gas Phase Ion

AbstractStudies of gas phase ion-neutral reactions provide insight into many areas of astrochemistry, including the elusive characterization of the Diffuse Interstellar Bands (DIBs). This presentation gives an overview of our experimental studies of several classes of positive and negative ions, using the flowing afterglow-selected ion flow tube and a newly modified ion trap. Earlier studies of carbon chain anions and polycyclic aromatic hydrocarbon (PAH) cations, both of which have been suggested as carriers of the DIBs, are described. More recent work including isomeric PAHs, nitrogen-containing PAHs, negative ions of PAHs, and negative ions of 5-membered heterocyclic rings are discussed. Finally, the study of quantitative thermochemistry by coupling our results with data from Photoelectron Spectroscopy is described.

STUDIES OF ATOMIC PHYSICS AT RIKEN

1992 ◽  
Vol 02 (03) ◽  
pp. 233-237
Author(s):  
YOHKO AWAYA ◽  
TADASHI KAMBARA
Keyword(s):  
Atomic Physics ◽  
Experimental Studies ◽  
Heavy Ion ◽  
Ion Beams ◽  
Highly Charged Ions ◽  
Atomic Collision ◽  
Wide Range ◽  
Collision Processes ◽  
Charged Ions ◽  
Ion Species

Experimental studies of atomic physics are performed with heavy-ion beams from accelerators at RIKEN. The variety of ion species and wide range of velocities and charge states enable us to study atomic collision processes and spectroscopy of highly charged ions. An overview of the works is presented.

scholarly journals Ion flow and sheath physics studies in multiple ion species plasmas using diode laser based laser-induced fluorescence

2006 ◽  
Vol 506-507 ◽  
pp. 674-678 ◽  
Author(s):  
G.D. Severn ◽  
Xu Wang ◽  
Eunsuk Ko ◽  
N. Hershkowitz ◽  
M.M. Turner ◽  
...  
Keyword(s):  
Diode Laser ◽  
Laser Induced Fluorescence ◽  
Ion Flow ◽  
Ion Species

Experimental studies of the two-ion species flow in the plasma presheath

2006 ◽  
Vol 13 (5) ◽  
pp. 053503 ◽  
Author(s):  
X. Wang ◽  
N. Hershkowitz
Keyword(s):  
Experimental Studies ◽  
Ion Species

3-D reconstruction and analysis of mammalian mitotic spindle structure

1992 ◽  
Vol 50 (1) ◽  
pp. 578-579
Author(s):  
Kent McDonald ◽  
David Mastronarde ◽  
Rubai Ding ◽  
Eileen O'Toole ◽  
J. Richard McIntosh
Keyword(s):  
Cross Sections ◽  
Mitotic Spindle ◽  
Experimental Studies ◽  
Video Camera ◽  
Three Dimensions ◽  
Mitotic Spindles ◽  
Black And White ◽  
Reconstruction Methods ◽  
Spindle Structure ◽  
Tissue Culture Line

Mammalian spindles are generally large and may contain over a thousand microtubules (MTs). For this reason they are difficult to reconstruct in three dimensions and many researchers have chosen to study the smaller and simpler spindles of lower eukaryotes. Nevertheless, the mammalian spindle is used for many experimental studies and it would be useful to know its detailed structure.We have been using serial cross sections and computer reconstruction methods to analyze MT distributions in mitotic spindles of PtK cells, a mammalian tissue culture line. Images from EM negatives are digtized on a light box by a Dage MTI video camera containing a black and white Saticon tube. The signal is digitized by a Parallax 1280 graphics device in a MicroVax III computer. Microtubules are digitized at a magnification such that each is 10-12 pixels in diameter.

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