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| MOPC040 |
COBALD - an Inverse Compton Back-scattering Source at Daresbury
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160 |
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- D. J. Holder
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- D. Laundy
STFC/DL, Daresbury, Warrington, Cheshire
- G. Priebe
STFC/DL/SRD, Daresbury, Warrington, Cheshire
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An inverse Compton Back-scattering (CBS) ultra-short pulsed x-ray source driven by the multi-terawatt laser installed at Daresbury’s Energy Recovery Linac Prototype (ERLP) is being developed. Hard x-rays, ranging from 15 keV to 30 keV, depending on the backscattering geometry, will be generated through the interaction of the laser pulse and an electron bunch delivered by ERLP. The X-rays created contain 15 ·106 photons per pulse from head-on collisions, with a pulse duration comparable to that of the incoming electron bunch, and 5 ·106 photons per pulse from side-on collisions, where the laser pulse defines the pulse width. The peak spectral brightness of ≈1020 photons/s/mm2/mrad2/0.1% ΔE/E is close to that of 4th-generation synchrotron light sources. Called COBALD, it will initially be used as a short pulse diagnostic for the ERLP electron beam and will explore the extreme challenges of photon/electron beam synchronization, which is a fundamental requirement for all accelerator-based (whether FEL or spontaneous SR) dynamics programmes. Furthermore, a fast-melting experiment will be used as a diagnostic tool to provide further information on the stability of the source.
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| TUPC111 |
Overview of the Diagnostics Systems of PETRA III
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1323 |
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- G. Kube, K. Balewski, A. Brenger, H. T. Duhme, V. Gharibyan, J. Klute, K. Knaack, I. Krouptchenkov, T. Lensch, J. Liebing, D. Lipka, R. Neumann, R. Neumann, G. Priebe, F. Schmidt-Foehre, H.-Ch. Schroeder, R. Susen, S. Vicins, M. Werner, Ch. Wiebers, K. Wittenburg
DESY, Hamburg
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Since mid-2007, the existing storage ring PETRA at DESY is reconstructed towards a dedicated third generation hard x-ray light source operating at 6 GeV with 100 mA stored current. The reconstruction includes the total rebuilding of one-eights of the storage ring. In this part the FODO lattice of the arcs is replaced by double-bend achromat cells, resulting in straight sections for 14 insertion device beamlines. Damping wigglers with a total length of 80 m are installed to reduce the emittance down to the design value of 1 nm rad. In order to fully benefit from this low emittance, beam stability is a crucial issue. For the achievement of the required performance and to allow a safe machine operation a number of beam instrumentation is required. Here the diagnostics system for the electron beam is presented with special emphasis on the essential instruments, i.e. the high resolution BPM system, profile monitors, feedback systems, and the machine protection system.
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