Results 211 to 220 of about 5,357 (265)

Cathode Space Charge in Bmad

2022
We present an implementation of charged particle tracking with the cathode space charge effect included which is now openly available in the Bmad toolkit for charged particle simulations. Adaptive step size control is incorporated to improve the computational efficiency.
Wang, Ningdong, Crittenden, James, Gulliford, Colwyn, Hoffstaetter, Georg, Mayes, Christopher, Sagan, David   +5 more
openaire   +1 more source

Cathodic hydrogen charging of zinc

Corrosion Science, 2014
Abstract The effect of cathodic hydrogen charging on the structural and mechanical characteristics of zinc was investigated. Hardening of the surface layers of zinc, due to hydrogen incorporation and possible formation of ZnH2, was observed. In addition, the residual stresses brought about by the incorporation of hydrogen atoms into the metallic ...
C.N. Panagopoulos, E.P. Georgiou, D. Chaliampalias   +2 more
openaire   +1 more source

Formative time of the cathodic space charge

Il Nuovo Cimento, 1954
The present paper sets forth a criterion for the evaluation of the formative time of the cathodic space charge, beginning with the moment at which the discharge becomes self-standing. Such a criterion is based on two facts to be observed in the study of intermittent discharges with a low-pressure gas: 1) it is possible to note a rise time of the ...
D. Brini, O. Rimondi, P. Veronesi
openaire   +1 more source

Space-Charge Effects Near A Cathode

Proceedings of the 2005 Particle Accelerator Conference, 2006
RF photocathode guns are excellent sources of high brightness electron bunches. To mitigate space charge effects downstream of the gun it is often desirable to produce electron bunches with a uniform density distribution. Our goal is to understand how the longitudinal bunch profile is determined by the emission dictated by the laser pulse intensity and
V.V. Gorgadze, J.S. Wurtele
openaire   +1 more source

Space Charge Distribution in the Cathode Fall Region of an Ar Hollow Cathode Discharge

Applied Spectroscopy, 1988
The electric field above the cathode surface of an Ar hollow cathode discharge has been measured by optogalvanic Stark spectroscopy. The field depends on the radial position of illumination and describes the radial distribution of the space charge density, ρ(r), as ρ(r) = –Ar + B, where r is the radial position and the parameters A and B are positive ...
Takashi Masaki, Akihide Wada, Yukio Adachi, Chiaki Hirose   +3 more
openaire   +1 more source

A Charged-Particle Detector Based on Proportional Tubes with a Segmented Cathode and Cathode Readout

Instruments and Experimental Techniques, 2001
A charged-particle detector based on proportional tubes with cathode readout is described. The cathode is sectionalized into 2.2 × 2.2-cm pads. The detector was tested on high-energy particle beams. At an anode-to-cathode distance of 1.1 cm, the spatial resolution was 1.25 mm along the anode wire.
A. M. Blick, M. Yu. Bogolyubsky, S. V. Erin, M. O. Lobanov, N. G. Minaev, S. A. Sadovsky, V. D. Samoilenko, V. I. Suzdalev, V. V. Tikhonov, Yu. V. Kharlov, A. Di Mauro, P. Martinengo, F. Piuz, J. Van Beelen, D. Williams, M. S. Ippolitov, Yu. G. Sibiryak, M. A. Volkov, A. Klovning, O. A. Maeland, O. H. Odland, R. Rongved, B. Skaali   +22 more
openaire   +1 more source

Hollow cathode effects in charge development processes in transient hollow cathode discharges

IEEE Transactions on Plasma Science, 1995
A detailed experimental study of space charge formation and ionization growth in transient hollow cathode discharges (THCD) is presented. The experiment was performed with an applied step voltage up to 30 kV, with rise time less than 50 ns. The discharge was operated in different gases, at pressures in the range 50-750 mTorr, with cathode apertures ...
M. Favre, P. Choi, H. Chuaqui, Y. Kaufman, J. Moreno, E. Wyndham, M. Zambra   +6 more
openaire   +2 more sources

Cathodic disbonding of paint films-transport of charge

Corrosion Science, 1993
Abstract Cathodic disbonding and charge transport through paint films were studied as a function of polarization potential, temperature, dry-film thickness and cation type in the electrolyte. It was found that both the disbonding rate and the charge transport were linearly related to the polarization potential.
Jan Ivar Skar, Unni Steinsmo
openaire   +1 more source

Charge Storage in Cathode-Ray Tubes

Proceedings of the IRE, 1951
The charging process in cathode-ray tubes used for static storage of information is analyzed for both a stationary spot and a linear scan, with and without redistribution of secondary electrons. Approximate equations are derived for the surface potentials and charging current as functions of time and other parameters, such as primary beam current ...
openaire   +1 more source

The hydrogen content of austenite after cathodic charging

Scripta Metallurgica, 1981
Abstract We have made direct measurements of deuterium concentration profiles and have shown that the concentration of hydrogen (deuterium) in the near-surface layers of 310 austenitic steel following room-temperature cathodic charging in poisoned electrolytes is 0.5 to 0.8 hydrogen atoms per metal atom.
K. Farrell, M.B. Lewis
openaire   +1 more source