Conveners
Session 11
- Kevin Smith (Brookhaven National Laboratory)
Dr
Themistoklis Mastoridis
(CERN)
20/10/2011, 11:20
High beam currents in circular accelerators lead to stability and performance limits associated with static and dynamic beam loading. Sophisticated techniques in the feedback control system of the RF stations are necessary to mitigate these effects. One-turn delay filters have been commonly included in the low-level RF feedback loops, to reduce the impedance presented to the beam by the...
Maria Elena Angoletta
(CERN)
20/10/2011, 11:40
The CERN PS complex comprises machines belonging to the Large Hadron Collider (LHC) injection chain, such as the Proton Synchrotron Booster (PSB), the Proton Synchrotron (PS) and the Low Energy Ion Ring (LEIR), as well as the Antiproton Decelerator (AD). These machines share several characteristics, such as a wide frequency swing between injection and extraction, mostly low-frequency cavities...
Dr
Axel Neumann
(Helmholtz-Zentrum Berlin)
20/10/2011, 12:00
In Energy Recovery Linacs, such as the Cornell ERL or BERLinPro, the main linac cavities are operated in CW at low beam-loading. The choice of the loaded Q is driven by two opposing factors. Limited RF power favors for a high external Q to allow operation at the desired field level, while a higher Q and such a narrow bandwidth leads to increasing field instability in presence of microphonics...
Tim Berenc
(Argonne National Laboratory)
20/10/2011, 12:20
The Short-Pulse X-ray (SPX) system within Argonne National Laboratory’s (ANL) Advanced Photon Source Upgrade (APS-U) project will use Zholents’ transverse radio-frequency (rf) chirp scheme to produce picosecond time-scale x-ray pulses at the APS. This scheme will utilize two sets of superconducting rf deflecting cavities installed in the APS storage ring: one set to produce transverse beam...
Mr
Rihua Zeng
(European Spallation Source ESS AB)
20/10/2011, 12:40
The LLRF design is undergoing at ESS where about 200 LLRF stations are expected to be built by the year 2019 for a variety of RF cavities such as RFQ, DTL, spoke and elliptical superconducting cavities, which are planned to be individually powered, i.e.one klystron per cavity in current design. It is essential to identify and recognize the requirement, issues and challenges to be addressed in...
