نتایج جستجو برای: plasma accelerator
تعداد نتایج: 370240 فیلتر نتایج به سال:
OBJECTIVE To study the effect of atmospheric pressure plasma (APP) jet as a potential accelerator of the degradation of hydrogen peroxide in bleaching gels which could lead to better and faster bleaching. MATERIAL AND METHODS 25 pastilles of hydroxylapatite were colored in green tea for 8 hours and were randomly divided into five groups (n = 5). The bleaching process was performed with 30% an...
A photo-ionized lithium source is developed for plasma acceleration applications. A homogeneous column of lithium neutral vapor with a density of 2 10 cm 3 is confined by helium gas in a heat-pipe oven. A UV laser pulse ionizes the vapor. In this device, the length of the neutral vapor and plasma column is 25 cm. The plasma density was measured by laser interferometry in the visible on the lith...
Article history: Received 1 January 2010 Received in revised form 15 June 2010 Accepted 6 September 2010 Available online 15 September 2010
A plasma based wakefield acceleration (PWFA) experiment, scheduled to run this summer, will accelerate parts of a 28.5 GeV bunch from the SLAC linac by up to 1 GeV over a length of 1 meter. A single 28.5 GeV bunch will both induce the wakefields in the one meter long plasma and witness the resulting acceleration fields. The experiment will explore and further develop the techniques that are nee...
We present an analytical study on the effects of transverse plasma gradient in blowout regime a wakefield accelerator. The analysis departs from simple ballistic model electrons and allows us to derive complete analytic solution for pseudopotential and, consequently, wakefield. demonstrate that modifies bubble shape affects wakefield; namely, dipole results component Analysis suggests that, des...
The design and performance optimization of particle accelerators are essential for the success of the DOE scientific program in the next decade. Particle accelerators are very complex systems whose accurate description involves a large number of degrees of freedom and requires the inclusion of many physics processes. Building on the success of the SciDAC-1 Accelerator Science and Technology pro...
FACET is a proposed facility at SLAC National Accelerator Laboratory. It will provide high energy, tightly focused and compressed electron and positron bunches for beam driven plasma wakefield acceleration research and other experiments. FACET will be built in the SLAC linac sector 20, where it will be separated from the LCLS located immediately downstream and will take advantage of the upstrea...
We present a progress report on a program to develop a high–power second harmonic magnicon amplifier at 11.4 GHz for linear accelerator applications. The experiments are being carried out on the NRL Long–Pulse Accelerator Facility using a plasma cathode to create the electron beam. Typical beam parameters are 500–700 kV, 170–250 A, 5.5 mm diameter, with a ~300 nsec voltage flattop. The accelera...
Laser plasma accelerators are currently able to produce ultra-short, quasi-monoenergetic and collimated electron beam of major interest for the study of ultra-fast phenomena, material science and medicine. A laser based accelerator designed to produce GeV electrons with 2% bandwidth and low emittance (0.02mmmrad) is presented. This compact approach (cm scale for the plasma) and tens of meters l...
The possibility of using high density plasmas as a medium for a high gradient accelerator is being studied experimentally at UCLA. This proof-ofprinciple experiment uses a large C@ laser to excite plasma waves with large accelerating fields and a 1.5 MeV linac to probe the fields. Preliminary results from optical scattering diagnostics indicate that the length L of the wave times the accelerati...
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