STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
BERGOZ Instrumentation, Saint Genis Pouilly
An alternative to a BPM with a continuous detector/ADC clock distributed from a synchronised with beam master generator is a self-synchronised BPM where the clock is manufactured from the beam signal itself. In a single-shot BPM of such kind [1], which is being designed for the EMMA Accelerator, the ADC should execute several subsequent fast rate measurements with a clock burst triggered by the bunch on each turn. We investigated a work of some fast pipeline-type ADCs suitable for BPMs, in a burst regime where a minimal burst length is decided by the ADC latency. The results did show that pipeline-type ADCs a main merit of whose is a high precision are usable in single-shot BPMs. We discuss how to prevent some ADC resolution deterioration that typically occurs at first samples, and to attain an ultimate ADC resolution in a single-shot BPM.
[1] A. Kalinin, Towards Sub-Micrometer Resolution of Single-Shot Strip Line BPM, EUROTeV-Report-2008-056.
CELLS-ALBA Synchrotron, Cerdanyola del Vallès
The design of the stripline kickers shall be adapted to match the line impedance, maximize the effective beam kick, reduce the heat load and minimize the transverse coupling impedance. These kickers are used for either tune measurements or transverse feedback. We describe the ALBA design of these kickers for both Booster and Storage Ring.
CERN, Geneva
Many beam instrumentation signals of large circular accelerators are in the kHz range and can thus be digitised with powerful high resolution ADCs. A particularly large dynamic range can be achieved if the signals are analysed in the frequency domain. This report presents a system employing audio ADCs and FPGA-based spectral analysis, initially developed for tune measurement applications. Technical choices allowing frequency domain dynamic ranges beyond 140 dB are summarised.
GSI, Darmstadt
The FAIR (Facility for Antiprotons and Ions Research) accelerator complex is currently designed and projected at GSI. The unique features of the central machine SIS100, like e.g. the acceleration of high intensity beams of 2.5·1013 protons and 5·1011 Uranium ions, the operation close to the space charge limit leading to a large tune spread and the extreme UHV conditions of the cryogenic system for fast ramped superconducting magnets, make challenging demands on the beam diagnostic components. This contribution describes the general concept of beam diagnostics for FAIR and reports on the present status of prototype studies. Exemplarily the achievements for a novel type of dc transformer, beam position monitors and the ionization profile monitor are discussed and first measurements with prototype setups are presented.
