Field-ionization threshold and its induced ionization-window phenomenon for Rydberg atoms in a short single-cycle pulse [PDF]
, 2014 We study the field-ionization threshold behavior when a Rydberg atom is ionized by a short single-cycle pulse field. Both hydrogen and sodium atoms are considered. The required threshold field amplitude is found to scale \emph{inversely} with the binding
Robicheaux, F., Yang, B. C.
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Picosecond ionization dynamics in femtosecond filaments at high pressures [PDF]
, 2017 We investigate the plasma dynamics inside a femtosecond-pulse-induced filament generated in an argon gas for a wide range of pressures up to 60 bar. At higher pressures, we observe ionization immediately following a pulse, with up to a threefold increase
Gaeta, AL +9 more
core +1 more source
Cavity-enhanced photoionization of an ultracold rubidium beam for application in focused ion beams [PDF]
, 2017 A two-step photoionization strategy of an ultracold rubidium beam for application in a focused ion beam instrument is analyzed and implemented. In this strategy the atomic beam is partly selected with an aperture after which the transmitted atoms are ...
Haaf, G. ten +3 more
core +7 more sources
Ultrafast electro-nuclear dynamics of H2 double ionization [PDF]
, 2007 The ultrafast electronic and nuclear dynamics of H2 laser-induced double ionization is studied using a time-dependent wave packet approach that goes beyond the fixed nuclei approximation.
A. McPherson +5 more
core +4 more sources
Effect of impact ionization in the InGaAs absorber on excess noise of avalanche photodiodes [PDF]
, 2005 The effects of impact ionization in the InGaAs absorption layer on the multiplication, excess noise and breakdown voltage are modeled for avalanche photodiodes (APDs), both with InP and with InAlAs multiplication regions.
David, J.P.R. +3 more
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Intensity-Resolved Above Threshold Ionization of Xenon with Short Laser Pulses [PDF]
, 2014 We present intensity-resolved above threshold ionization (ATI) spectra of xenon using an intensity scanning and deconvolution technique. Experimental data were obtained with laser pulses of 58 fs and central wavelength of 800 nm from a chirped-pulse ...
Hart, Nathan A. +5 more
core +3 more sources
The different origins of high- and low-ionization broad emission lines revealed by gravitational microlensing in the Einstein cross [PDF]
, 2016 We investigate the kinematics and ionization structure of the broad emission line region of the gravitationally lensed quasar QSO2237+0305 (the Einstein cross) using differential microlensing in the high- and low-ionization broad emission lines.
Anguita, Timo +3 more
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Low ionization state plasma in CMEs
, 2012 The Ultraviolet Coronagraph Spectrometer on board the Solar and Heliospheric Observatory (SOHO) often observes low ionization state coronal mass ejection (CME) plasma at ultraviolet wavelengths. The CME plasmas are often detected in O VI (3x10^5K), C III
Lee, Jin-Yi, Raymond, John C.
core +1 more source
, 2002 In conditions where the interaction betweeen an atom and a short high-frequency extreme ultraviolet laser pulse is a perturbation, we show that a simple theoretical approach, based on Coulomb-Volkov-type states, can make reliable predictions for ...
A. Basile +12 more
core +1 more source
Instantaneous ionization rate as a functional derivative [PDF]
, 2018 We describe an approach defining instantaneous ionization rate (IIR) as a functional derivative of the total ionization probability. The definition is based on physical quantities which are directly measurable, such as the total ionization probability ...
Hofmann, C. +5 more
core +4 more sources