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In the continuing efforts to reduce the beam emittance of an electron storage ring composed of theoretical minimum emittance (TME) lattice, down to a level of several tens of picometers, nonlinear dynamics grows to be a great challenge to the performance of the storage ring because of the strong...
Coherent electron cooling is an ultrahigh-bandwidth form of stochastic cooling which utilizes the charge perturbation from Debye screening as a seed for a free-electron laser. The amplified and frequency-modulated signal that results from the free-electron laser process is then used to give an...
The design of narrow-band Compton scattering sources for specific applications using nuclear resonance fluorescence (NRF) is presented. NRF lines are extremely narrow ( Δ E / E ∼ 10 - 6 ) and require spectrally narrow sources to be excited selectively and efficiently. This paper focuses on the...
In this work, we present a technique to measure the acceptance of a circular accelerator extending a previous method by the measurement of particle loss. Here, we apply an rf voltage to transversely excite a coasting heavy ion beam in the SIS-18 synchrotron at GSI. The resulting growth...
A novel magnet configuration for permanent magnet undulators is proposed together with the operational procedures to improve the wavelength tunability of free electron lasers (FELs). The magnetization axes of the magnet blocks in the new configuration are inclined at a certain angle to those of...
We describe a large scale simulation effort using Object Oriented Parallel Accelerator Library, that leads to a better quantitative understanding of the existing Paul Scherrer Institut high power proton cyclotron facility. The 1.3 MW of beam power on target poses stringent constraints on the...
A one-dimensional Vlasov-Poisson model for sheet beams is reviewed and extended to provide a simple framework for analysis of space-charge effects. Centroid and rms envelope equations including image-charge effects are derived and reasonable parameter equivalences with commonly employed 2D...
We study the possibility to produce a 1.6 pC electron beam ( 10 7 electrons) with a bunch length of less than 10 fs and a beam energy of a few MeV. Such a short, relativistic beam will be useful for an electron diffraction experiment with a 10 fs time resolution. An electron beam with 10 7...
We present the application of a short rise ( ∼ 150 ns ) 250 kA linear transformer driver (LTD) to wire array z -pinch loads for the first time. The generator is a modification of a previous driver in which a new conical power feed provides a low inductance coupling to...
The ion-induced desorption experiment, installed in the CERN Heavy-Ion Accelerator LINAC 3, has been used to study the dynamic outgassing of cryogenic surfaces. Two different targets, bare and gold-coated copper, were bombarded under perpendicular impact with 4.2 MeV / u Pb 54 + ions. Partial...
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