Results 81 to 90 of about 484,111 (194)

Mechanism of Change in The Emission and Optical Properties of W and Mo After Bombardment with Low-Energy Ions

East European Journal of Physics
The paper reports the results of study of composition, emission, and optical properties of polycrystalline W and Mo samples implanted with Ba+ ions and coated with submonolayer Ba atoms by applying Auger electron spectroscopy, secondary electron emission
D.А. Tashmukhamedova, B.E. Umirzakov, Y.S. Ergashov, F.Y. Khudaykulov, Kh.E. Abdiev   +4 more
doaj   +1 more source

Simulation of the electron-cloud build up and its consequences on heat load, beam stability, and diagnostics

Physical Review Special Topics. Accelerators and Beams, 2001
Photoemission and secondary emission are known to give rise to a quasistationary electron cloud inside the beam pipe through a beam-induced multipacting process. We investigate the electron-cloud build up and related effects via computer simulation.
G. Rumolo, F. Ruggiero, F. Zimmermann
doaj   +1 more source

Structural and Secondary Electron Yield Properties of Titanium-Palladium Films with Laser-Treated Copper Substrate for Application in Neutron Generators. [PDF]

Materials (Basel), 2021
Gao Y, Wang S, Wang J, You Z, Zhang J, Hu Y, Wu Y, Fan J, Li H, Zhan Q, Yang H, Xu Z.   +11 more
europepmc   +1 more source

Benchmarking electron-cloud simulations and pressure measurements at the LHC

, 2013
During the beam commissioning of the Large Hadron Collider (LHC) with 150, 75, 50 and 25-ns bunch spacing, important electron-cloud effects, like pressure rise, cryogenic heat load, beam instabilities or emittance growth, were observed. A method has been
Dominguez, O., Zimmermann, F.
core   +1 more source

Nanopillar Arrays on Semiconductor Membranes as Electron Emission Amplifiers

, 2007
A new transmission-type electron multiplier was fabricated from silicon-on-insulator (SOI) material by integrating an array of one dimensional (1D) silicon nanopillars onto a two dimensional (2D) silicon membrane.
Bethe A, Bruining H, Egerton R F, Hua Qin, Hyun-Seok Kim, Joy D C, Porter F S, Robert H Blick   +7 more
core   +1 more source

Photoneutron yield for an electron beam on tantalum and erbium deuteride

Nuclear Engineering and Technology
An electron beam may be used to generate bremsstrahlung photons that go on to create photoneutrons within metals. This serves as a low-energy neutron source for irradiation experiments.
Andrew K. Gillespie, Cuikun Lin, R.V. Duncan   +2 more
doaj   +1 more source

Maps for electron cloud density in Large Hadron Collider dipoles

Physical Review Special Topics. Accelerators and Beams, 2007
The generation of a quasistationary electron cloud inside the beam pipe through beam-induced multipacting processes has become an area of intensive study.
T. Demma, S. Petracca, F. Ruggiero, G. Rumolo, F. Zimmermann   +4 more
doaj   +1 more source

Thermodynamic investigation of an insulator irradiated by a low-energy electron beam

, 2005
The surface of an insulating material irradiated by a beam of low energy electrons charges positively if the yield of secondary electron is greater than unity.
Garoche, P., Pesty, F.
core   +2 more sources

Analytical and experimental performance of a dual-mode traveling wave tube and multistage depressed collector [PDF]

A computational procedure for the design of traveling-wave-tube(TWT)/refocuser/multistage depressed collector (MDC) systems was used to design a short, permanent-magnet refocusing system and a highly efficient MDC for a medium-power, dual-mode, 4.8- to 9.
Force, Dale A., Kosmahl, Henry G., Ramins, Peter   +2 more
core   +1 more source

Secondary-electron-emission properties of conducting surfaces with application to multistage depressed collectors for microwave amplifiers [PDF]

To improve the efficiency of high power microwave tubes, low secondary electron yield electrode surface for use in depressed collectors are needed. The secondary emission characteristics of a number of materials were investigated.
Forman, R.
core   +1 more source