A low-cost, accurate and non-intercepting continuous method for beam current measurements in a high-current ion implanter

2007 ◽  
Vol 265 (2) ◽  
pp. 576-580 ◽  
Author(s):  
L.M. Redondo ◽  
J. Rocha ◽  
J.C. Soares
Keyword(s):  
Low Cost ◽  
Beam Current ◽  
Continuous Method ◽  
High Current

Asphalt pavement macrotexture monitoring in cracked surfaces by using an acoustical low-cost continuous method

2021 ◽  
Vol 132 ◽  
pp. 103932
Author(s):  
Mohammad Reza Ganji ◽  
Ali Ghelmani ◽  
Amir Golroo ◽  
Hamid Sheikhzadeh
Keyword(s):  
Asphalt Pavement ◽  
Low Cost ◽  
Continuous Method

scholarly journals Linear transformer accelerator for the excimer laser

2003 ◽  
Vol 21 (2) ◽  
pp. 219-222 ◽  
Author(s):  
B.M. KOVALCHUK ◽  
E.N. ABDULLIN ◽  
D.M. GRISHIN ◽  
V.P. GUBANOV ◽  
V.B. ZORIN ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Excimer Laser ◽  
Electron Energy ◽  
High Voltage ◽  
Beam Current ◽  
The Self ◽  
High Current ◽  
Stored Energy ◽  
Beam Formation ◽  
Diode Current

A high-current accelerator for pumping of the 200-L excimer laser is developed, providing electron energy of 550 keV, a diode current of 320 kA, and an e-beam current of 250 kA. The high-voltage part of the accelerator consists of two linear transformers with a stored energy of 98 kJ. To reduce the influence of the self-magnetic field on e-beam formation, the vacuum diode is divided into six separate magnetically isolated diodes.

Development of a high-current microbeam system

2014 ◽  
Vol 24 (03n04) ◽  
pp. 101-110 ◽  
Author(s):  
S. Matsuyama ◽  
K. Ishii ◽  
S. Suzuki ◽  
A. Terakawa ◽  
M. Fujiwara ◽  
...  
Keyword(s):  
Quadrupole Doublet ◽  
Spot Size ◽  
Beam Current ◽  
Chemical State ◽  
High Current ◽  
Rigid Support ◽  
Beam Spot ◽  
X Ray ◽  
Beam Spot Size

We report on the development of a high-current microbeam system for wavelength-dispersive X-ray micro particle-induced X-ray emission (WDX-[Formula: see text]-PIXE) for chemical state mapping. The microbeam system is composed of two slits and a quadrupole doublet lens mounted on a heavy rigid support. The microbeam system is installed immediately after a switching magnet. A beam brightness of [Formula: see text] is obtained at a half-divergence of 0.1 mrad. A beam current of more than 300 pA is obtained for object sizes of [Formula: see text] with a half-divergence of 0.2 mrad, which corresponds to a beam spot size of [Formula: see text]. The calculated spot size of the beam was [Formula: see text] and the measured spot size was [Formula: see text]. The WDX-[Formula: see text]-PIXE system with the microbeam system is now operational.

scholarly journals 14C AMS Measurements of <100 μG Samples with a High-Current System

Radiocarbon ◽  
1997 ◽  
Vol 40 (1) ◽  
pp. 247-253 ◽  
Author(s):  
Karl F. Von Reden ◽  
Ann P. McNichol ◽  
Ann Pearson ◽  
Robert J. Schneider
Keyword(s):  
Current System ◽  
Ion Beam ◽  
Beam Current ◽  
Small Sample ◽  
Small Samples ◽  
High Current ◽  
Beam Optics ◽  
Woods Hole Oceanographic Institution ◽  
Factors Affecting ◽  
The Past

The NOSAMS facility at Woods Hole Oceanographic Institution has started to develop and apply techniques for measuring very small samples on a standard Tandetron accelerator mass spectrometry (AMS) system with high-current hemispherical Cs sputter ion sources. Over the past year, results on samples ranging from 7 to 160 μg C showed both the feasibility of such analyses and the present limitations on reducing the size of solid carbon samples. One of the main factors affecting the AMS results is the dependence of a number of the beam optics parameters on the extracted ion beam current. The extracted currents range from 0.5 to 10 μA of 12C− for the sample sizes given above. We here discuss the setup of the AMS system and methods for reliable small-sample measurements and give the AMS-related limits to sample size and the measurement uncertainties.

Low-cost HVDC circuit breaker with high current breaking capability based on IGCTs

2020 ◽  
pp. 1-1
Author(s):  
Qiang Yi ◽  
Yifei Wu ◽  
Zhihui Zhang ◽  
Fei Yang ◽  
Yi Wu ◽  
...  
Keyword(s):  
Low Cost ◽  
Circuit Breaker ◽  
High Current

SINBAD, a brilliant IR source from the DAΦNE storage ring

1998 ◽  
Vol 5 (3) ◽  
pp. 575-577 ◽  
Author(s):  
Augusto Marcelli ◽  
Emilio Burattini ◽  
Corrado Mencuccini ◽  
Paolo Calvani ◽  
Alessandro Nucara ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Optical System ◽  
Michelson Interferometer ◽  
Black Body ◽  
Cvd Diamond ◽  
Beam Current ◽  
High Current ◽  
Cvd Diamond Film ◽  
Ray Tracing Simulation ◽  
Collimated Beam

SINBAD is the Italian IR synchrotron radiation beamline, designed to work at wavelengths greater than 10 µm. It is being installed on DAΦNE, a new collider that is designed to work at 0.51 GeV with a beam current up to 5 A. Due to such a high current, the IR extracted from a bending magnet will be more brilliant than that of a black body at 2000 K by two orders of magnitude at 100 µm. The beamline optical system, projected by ray-tracing simulation, consists of six mirrors that first focus the radiation on a wedged CVD diamond-film window and then transfer the collimated beam to the experimental area where a Michelson interferometer will be installed.

scholarly journals HIGH-CURRENT RELATIVISTIC ELECTRON BEAM FOCUSING IN PLASMA

2021 ◽  
pp. 30-34
Author(s):  
О.V. Manuilenko ◽  
A.V. Pashchenko ◽  
V.G. Svichensky ◽  
B.V. Zajtsev
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
External Magnetic Field ◽  
Relativistic Electron ◽  
Relativistic Electron Beam ◽  
Beam Current ◽  
High Current ◽  
Plasma Parameters ◽  
Beam Focusing ◽  
Envelope Equation

The analysis of the envelope equation for high-current relativistic electron beam propagation in plasma in an external uniform magnetic field is presented. The envelope equation is obtained in a Hamiltonian form with an effective potential, which depends from electron beam and plasma parameters, and external magnetic field. Hamiltonian aproach allows fully analyze the behavior of the beam envelope as a function of the beam current, beam energy, plasma density and conductivity, as well as on the external magnetic field and the initial beam angular momentum.

scholarly journals N-Doped Carbon Boosted the Formation of Few-Layered MoS2 for High-Performance Lithium and Sodium Storage

2021 ◽  
Vol 8 ◽  
Author(s):  
Junfeng Li ◽  
Xianzi Zhou ◽  
Kai Lu ◽  
Chao Ma ◽  
Liang Li ◽  
...  
Keyword(s):  
Current Density ◽  
High Performance ◽  
High Current Density ◽  
Low Cost ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Molybdenum Sulfide ◽  
High Current ◽  
High Theoretical Capacity ◽  
Sodium Storage

Molybdenum sulfide (MoS2) has become a potential anode of lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) due to its high theoretical capacity and low cost. However, the volume expansion, poor electrical conductivity and dissolution of polysulfides in the electrolyte during the cycling process severely limited its applications. Herein, few-layered MoS2@N-doped carbon (F-MoS2@NC) was synthesized through a facile solvothermal and annealing process. It was found that the addition of N-doped carbon precursor could significantly promote the formation of few-layered MoS2 and improve the performances of lithium and sodium storage. A high reversible capacity of 482.6 mA h g−1 at a high current density of 2000 mA g−1 could be obtained for LIBs. When used as anode material for SIBs, F-MoS2@NC hybrids could maintain a reversible capacity of 171 mA h g−1 at a high current density of 1,000 mA g−1 after 600 cycles. This work should provide new insights into carbon hybrid anode materials for both LIBs and SIBs.

Low Cost 210K Gain Transmission Electron Microscope Image (TEMI) Intensifier

1981 ◽  
Vol 39 ◽  
pp. 382-383
Author(s):  
R.G. Rosemeier ◽  
M.E. Taylor ◽  
A.G. Wylie
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Low Cost ◽  
Beam Current ◽  
High Gain ◽  
Electron Beam Current ◽  
Transmission Electron ◽  
Fiber Materials ◽  
Beam Currents

There are a number of factors that limit transmission electron microscope (TEM) characterization. For example, when it is necessary to statistically assess large numbers of samples quickly, conventional time consuming film recording is not a plausible solution. In the case of many electron beam sensitive biological, polymeric, and fiber materials, great care must be taken to avoid both specimen damage or structure change by using minimum electron beam current densities. On the other hand, for mineral specimens, which are in general difficult to thin, maximum electron beam currents may not be high enough to produce anything but faint TEM images. As a result, a low cost portable TEM image (TEMI) intensifier was developed that allows both direct viewing of faint electron diffraction phenomenon as well as conventional TEM viewing. Figure 1 shows the portable high gain TEMI intensifier.

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