John Dusatko
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View article: SLAC microresonator RF (SMuRF) electronics: A tone-tracking readout system for superconducting microwave resonator arrays
SLAC microresonator RF (SMuRF) electronics: A tone-tracking readout system for superconducting microwave resonator arrays Open
We describe the newest generation of the SLAC Microresonator RF (SMuRF) electronics, a warm digital control and readout system for microwave-frequency resonator-based cryogenic detector and multiplexer systems, such as microwave supercondu…
View article: The LCLS-II Gun & Buncher LLRF Controller Upgrade
The LCLS-II Gun & Buncher LLRF Controller Upgrade Open
LCLS-II is currently in its commissioning phase at SLAC. It is an X-ray FEL driven by a CW superconducting LINAC. The beam injector plays a crucial role in the overall performance of the accelerator, and is critical to the final electron b…
View article: SLAC Microresonator RF (SMuRF) Electronics: A tone-tracking readout system for superconducting microwave resonator arrays
SLAC Microresonator RF (SMuRF) Electronics: A tone-tracking readout system for superconducting microwave resonator arrays Open
We describe the newest generation of the SLAC Microresonator RF (SMuRF) electronics, a warm digital control and readout system for microwave-frequency resonator-based cryogenic detector and multiplexer systems such as microwave SQUID multi…
View article: PIP-II 800 MeV Proton Linac Beam Pattern Generator
PIP-II 800 MeV Proton Linac Beam Pattern Generator Open
The PIP2 IT Beam Pattern Generator is the system that synchronizes beam injection and the RF systems between the PIP2 LINAC to the Booster. The RF frequencies of these two accelerator systems are not harmonically related. Synchronization i…
View article: Intra-bunch feedback system development at DAΦNE
Intra-bunch feedback system development at DAΦNE Open
This paper presents history and evolution of the intra-bunch feedback system for circular accelerators. This project has been presented by John D. Fox (SLAC/Stanford Un.) at the IPAC2010 held in Kyoto. The idea of the proposal is to build …
View article: Intra-bunch feedback system developments at DAFNE
Intra-bunch feedback system developments at DAFNE Open
This paper presents history and evolution of the intra-bunch feedback system for circular accelerators. This pro-ject has been presented by John D. Fox (SLAC/Stanford Un.) at the IPAC2010 held in Kyoto. The idea of the pro-posal is to buil…
View article: The Simons Observatory: science goals and forecasts
The Simons Observatory: science goals and forecasts Open
The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the scientific goals of the experiment, motivate the design, and fore…
View article: Evaluation of the Xilinx RFSoC for Accelerator Applications
Evaluation of the Xilinx RFSoC for Accelerator Applications Open
As electronic technology has evolved, accelerator system functions (e.g. beam instrumentation, RF cavity field control, etc.) are increasingly performed in the digital domain by sampling, digitizing, processing digitally, and converting ba…
View article: Control of Intra-Bunch Vertical Motion in the SPS with GHz Bandwidth Feedback
Control of Intra-Bunch Vertical Motion in the SPS with GHz Bandwidth Feedback Open
A GHz bandwidth vertical beam feedback system has been in development at the CERN SPS to explore control of unstable beam motion in single bunch and bunch train configurations. We present measurements and recent studies of stable and unsta…
View article: Ultra-Wideband Transverse Intra-Bunch Feedback: Beginning Development of a Next Generation 8GSa/s System
Ultra-Wideband Transverse Intra-Bunch Feedback: Beginning Development of a Next Generation 8GSa/s System Open
Building on the success of our 4GSa/s wideband trans-verse feedback system, we have begun development of a next generation ultra-wideband feedback processor which doubles the effective sampling rate to 8GSa/s. This higher sampling rate and…
View article: The SPS Wideband Feedback Processor: A Flexible FPGA-Based Digital Signal Processing Demonstration Platform for Intra-Bunch Beam Stability Studies
The SPS Wideband Feedback Processor: A Flexible FPGA-Based Digital Signal Processing Demonstration Platform for Intra-Bunch Beam Stability Studies Open
A flexible digital signal processing platform based on FPGA technology has been developed for vertical intra-bunch beam stability studies at the CERN SPS. This system is unique in that samples at a very high rate (4GSa/s) in order to measu…
View article: Impact of a Wideband Feedback Prototype System on TMCI in the SPS
Impact of a Wideband Feedback Prototype System on TMCI in the SPS Open
The transverse mode coupling instability (TMCI) in the SPS has been identified as one of the potential performance limitations for future high intensity LHC beams that will be required for the High Luminosity (HL)-LHC era and is being addr…
View article: Recent Results from the Wideband Feedback System Tests at the SPS and Future Plans
Recent Results from the Wideband Feedback System Tests at the SPS and Future Plans Open
A high bandwidth transverse feedback demonstrator system has been devised within the LARP framework in collaboration with SLAC for the LHC Injectors Upgrade (LIU) Project. The initial system targeted the Super Proton Synchrotron (SPS) at C…
View article: Control of Intra-Bunch Vertical Instabilities at the SPS - Measurements and Technology Demonstration
Control of Intra-Bunch Vertical Instabilities at the SPS - Measurements and Technology Demonstration Open
We present recent measurements demonstrating control of unstable beam motion in single bunch and bunch train configurations at the SPS. The work is motivated by anticipated intensity increases from the LIU and HL-LHC upgrade programs, and …
View article: Wideband Vertical Intra-Bunch Feedback at the SPS - Technology Development, Recent Accelerator Measurements and Next Steps
Wideband Vertical Intra-Bunch Feedback at the SPS - Technology Development, Recent Accelerator Measurements and Next Steps Open
A wideband vertical intra-bunch feedback system is in development at the CERN SPS for use to control potential Ecloud and TMCI instabilities. The work is motivated by planned intensity increases from the LIU and HL-LHC upgrade programs. Sy…
View article: Recent Upgrades to the CERN SPS Wideband Intra-bunch Transverse Feedback Processor
Recent Upgrades to the CERN SPS Wideband Intra-bunch Transverse Feedback Processor Open
In support of the CERN High Luminosity LHC (HL-LHC) upgrade program, a research and development effort has been underway to understand and develop feedback control techniques for mitigating transverse intra-bunch instabilities in the SPS d…
View article: Identification of Intra-bunch Transverse Dynamics for Model-Based Control Purposes at CERN Super Proton Synchrotron
Identification of Intra-bunch Transverse Dynamics for Model-Based Control Purposes at CERN Super Proton Synchrotron Open
The high luminosity upgrade plan for the LHC (HiLumi-LHC) increases the bunch intensity and the ultimate intensities require mitigation of possible intra-bunch instabilities in the SPS. Feedback systems can stabilize intra-bunch dynamics. …
View article: Identification of Intra-Bunch Transverse Dynamics for Model Based Wideband Feedback Control at CERN Super Proton Synchrotron
Identification of Intra-Bunch Transverse Dynamics for Model Based Wideband Feedback Control at CERN Super Proton Synchrotron Open
Multi-input multi-output (MIMO) feedback design techniques can be helpful to stabilize intra-bunch transverse instabilities induced by electron-clouds or transverse mode couplings at the CERN Super Proton Synchrotron (SPS). These MIMO tech…
View article: Wideband Vertical Intra-Bunch Feedback At The SPS - 2015 Results And Path Forward
Wideband Vertical Intra-Bunch Feedback At The SPS - 2015 Results And Path Forward Open
We present experimental measurements taken from CERN SPS machine development studies with a wideband intra-bunch feedback channel prototype. The demonstration system is a digital processing system with recently installed wideband kicker an…
View article: Upgrade and Operation of the Demonstration 4 GS/Sec. Intra-Bunch Instability Control System for the SPS
Upgrade and Operation of the Demonstration 4 GS/Sec. Intra-Bunch Instability Control System for the SPS Open
We present the expanded system implementation and operational experience details for the “Demo” technology platform commissioned at the SPS in January 2015. The system has been expanded during the LS1 shutdown with added features. The upgr…