Characterization of the double-double bend achromat lattice modification to the Diamond Light Source storage ring

Abstract

The Diamond storage ring has recently been modified by replacing one of the original double bend achromat (DBA) cells with a double-DBA (DDBA) cell. The new cell marks a fundamental break to the machine symmetry, and the final engineered solution shares many design features in common with modern multi-bend achromat cells. In this paper we review the impact that the modification has had on the linear and nonlinear optics, collective effects, and overall performance. Where appropriate, comparison to model predictions are also made.

Mode-Resolved Detection of Magnetization Dynamics Using X-ray Diffractive Ferromagnetic Resonance

“…For this purpose, we used the 900-bunch operation mode at the Diamond Light Source, providing pulsed photon bunches (41.5 ± 0.2) ps FWHM at a repetition frequency of the synchrotron master clock (499.68 MHz). 37 For the stroboscopic measurements, the microwave frequency has to be a harmonic of the X-ray pulse frequency, hence the resonance is driven at multiples of the clock frequency, corresponding to a ∼2 ns interval between consecutive X-ray pulses. Using filters and subsequent…”

“…DFMR measures the variation in intensity of the scattered peaks resulting from the stroboscopic probing of the magnetic structure with a pulsed X-ray source synchronized with magnetic dynamic processes. For this purpose, we used the 900-bunch operation mode at the Diamond Light Source, providing pulsed photon bunches (41.5 ± 0.2) ps FWHM at a repetition frequency of the synchrotron master clock (499.68 MHz) . For the stroboscopic measurements, the microwave frequency has to be a harmonic of the X-ray pulse frequency, hence the resonance is driven at multiples of the clock frequency, corresponding to a ∼2 ns interval between consecutive X-ray pulses.…”

Current status and future perspectives of accelerator-based x-ray light sources

“…The upgrade projects in other medium-scale SR facilities operated with a lower electron energy are also in progress, such as ALS [128], DIAMOND [129], SOLEIL [130], ELETTRA [131], and SLS [132], although all of them are still in the design phase and are not yet funded as of 2016. Among them, the ALS upgrade project is the most ambitious, which is aimed at generating a round electron beam with a coupling constant of 100%, and emittance of ´-5 10 11 m rad in both directions, which is much more attractive and useful for practical applications than the flattened beam in the typical storage rings.…”