Conveners
Hardware: Hardware (1/2)
- Kevin Smith
Hardware: Hardware (2/2)
- Mark Crofford (Oak Ridge National Laboratory)
With the help of complex control systems, today's FELs (e.g. the EuropeanXFEL at DESY) are able to provide light pulses with a duration of less than 100fs. The demands on the low-level RF (LLRF) control systems of such accelerators are high and the RF field detection in the superconducting cavities is crucial. To overcome the main limitations of today’s LLRF receivers, such as the noise of the...
Currently ALS is undergoing an upgrade to ALS-U to produce 100 times
brighter soft X-ray light. The LLRF system for Accumulator Ring (AR) is
composed of two identical LLRF stations, for driving RF amplifiers. The
closed loop RF amplitude and phase stability is measured as $< 0.1\%$ and $<
0.1 ^\circ$ respectively, using the non-IQ digital down conversion together
with analog up/down...
One of the crucial control systems of any particle accelerator is the Low Level Radio Frequency (LLRF). The purpose of a LLRF is to control the amplitude and phase of the field inside the accelerating cavity.
The LLRF is a subsystem of the CEA control domain for the SARAF-LINAC instrumentation and Seven Solutions has designed, developed, manufactured and tested the system based on CEA...
Incremental upgrades of the legacy low level RF (LLRF) equipment—50 years for the Los Alamos Neutron Science Center (LANSCE)—involves challenges and problems not seen with new and total replacement opportunities. The digital LLRF upgrade at LANSCE has deployed 30 of the 53 required systems as of September 2022. This paper describes the performance of the digital upgrade, current status, and...
Recent studies showed that the transverse feedback system noise floor in the Large Hadron Collider (LHC) must be reduced by at least factor of two in order to operate the machine with large beam-beam tune shift as foreseen in the High Luminosity (HL) LHC. Also, the future feedback system foreseen to suppress the LHC Crab Cavity noise relies on improved noise performance of the beam position...
The LLRF system of the Proton Synchrotron Booster (PSB) was widely renovated during Long Shutdown 2 (LS2) as part of the LHC Injectors Upgrade (LIU) project. Wide-band Finemet cavities were installed and a new cavity controller implemented in Field Programmable Gate Arrays (FPGA) was put into operation. In the new system, a fixed frequency clock is used with individual demodulation/modulation...
The single cavity field regulation systems, with active cavity resonance control, systematically complete the ESS project linac infrastructure. This LLRF system has a modular design provided by the MTCA.4 electronic standard choice. Thanks to this feature, the PEG (Polish Electronic Group) consortia members could develop and deliver individual components of the system. The work realized in the...
The CERN Proton Synchrotron (PS) is equipped with high frequency RF systems at 20 MHz, 40 MHz and 80 MHz. These are used to perform longitudinal beam manipulations in order to provide short bunches with 25 ns spacing to the Super Proton Synchrotron (SPS). As part of the "LHC Injectors Upgrade" (LIU) project, a new digital low level RF (LLRF) firmware has been developed for the high frequency...
