Hydraulic-assist driver for compact insertion devices

Ventricular assist devices for all?

In the past 5 years, the numbers of ventricular assist device (VAD) systems implanted worldwide have increased exponentially. Thus, since the introduction of the HeartMate II LVAD by Thoratec (Thoratec Inc., Pleasanton, CA, USA) over 10 000 of these pumps have been implanted. The HVAD manufactured by HeartWare (HeartWare Inc., Framingham, MA, USA) has also found widespread application in Europe...

The Energy Recovery Linac (erl) as a Driver for X-ray Producing Insertion Devices*#

Storage rings have served well as x-ray sources, achieving continued increases in flux and brilliance. While further improvements in performance may still be expected, the performance of these machines is constrained by radiation fluctuations and by the Touschek effect. The practical effect of the radiation fluctuations is to limit the minimum 6D emittance of the rings in general, and particula...

Insertion Devices

The characteristics of the synchrotron radiation generated by an electron beam in bending magnets, planar undulators and wiggler magnets are derived, with emphasis on the spectral flux, brilliance, and power densities. The interaction of the electron beam with the insertion device field is discussed in terms of closed orbit distortion, tune shift and non-linear effect. The technology of permane...

Magnetic counterforce for insertion devices.

In a standard insertion device, such as a wiggler or undulator, the force between two rows of magnets increases exponentially as the gap between the rows decreases. This force is usually managed by a powerful mechanical gap adjustor, sometimes with the aid of springs at small values of gap. This paper is a description of how the magnetic forces can be nulled using auxiliary counterforce magnets.

Left Ventricular Assist Devices.