Linear accelerator in which large alternating voltages are used to accelerate charged particles in a straight line; the concept dates back to the 1920s.
The plasma jet is generated by the disk magnetohydrodynamic plasma accelerator in which methane is used as the plasma-forming gas.
He had a lot going for him: a computer science degree, nearly five years of experience at Google, and a plum spot in the three-month program run by Y Combinator, a "business accelerator" in which experienced entrepreneurs mentor young entrepreneurs.
Zuckerberg then dropped in at Andela, a software developer accelerator, in which he and his wife's foundation invested $24million earlier this year.
Laser-driven accelerators, in which particles are accelerated by the electric field of a plasma wave (the wakefield) driven by an intense laser, have demonstrated accelerating electric fields of hundreds of GV m-1 (refs 1 3).
This is in contrast to interactions produced in fixed-target particle accelerators, in which a beam of accelerated particles strikes particles in a stationary target and only a fraction of the beam energy is transformed into the particle interaction energy.
Accelerators, in which entrepreneurs can shape their ideas and meet advisers and investors, are springing up: this week, for example, UpWest Labs, which intends to bring five to ten Israeli start-ups to Silicon Valley for ten-week stints, began its first programme.
Station parameter optimized radiation therapy (SPORT) was recently proposed to fully utilize the technical capability of emerging digital linear accelerators, in which the station parameters of a delivery system, such as aperture shape and weight, couch position/angle, gantry/collimator angle, can be optimized simultaneously.
We find that for a class of accelerators in which the physical data rate of an IO channel is the limiting bottleneck to accelerator throughput, our solution offers drastically reduced logic development time spent on data management without any associated performance losses in doing so.
Toyota said today it had received no reports of accidents with the fault in the UK, and urged owners of the affected models to continue to drive their cars unless there was any noticeable problem with the accelerator pedal – in which case they should contact their dealer immediately.
Both make use of the cyclotron principle (see particle accelerator: Cyclotrons), in which positive ions produced by a beam of electrons flowing along the axis of a uniform magnetic field follow circular trajectories with a radius proportional to momentum, r = mv/zB, and a frequency of rotation inversely proportional to mass, ω = v/r = zB/m.
