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A compact low-level RF control system for advanced concept compact electron linear accelerator

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/5.0265666· OSTI ID:2999039
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  1. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
  2. RadiaBeam Technologies LLC, Santa Monica, CA (United States)
  3. RadiaSoft LLC, Boulder, CO (United States)
+ Show Author Affiliations

A compact low-level RF (LLRF) control system based on RF system-on-chip (RFSoC) technology has been designed for the Advanced Concept Compact Electron Linear-accelerator (ACCEL) program, which has challenging requirements in both RF performance and size, weight, and power consumption (SWaP). The compact LLRF solution employs the direct RF sampling technique of RFSoC, which samples the RF signals directly without any analog upconversion and downconversion. Compared with the conventional heterodyne based architecture used for the LLRF system of a linear accelerator (LINAC), the elimination of analog mixers can significantly reduce the size and weight of the system, especially with LINAC requiring a larger number of RF channels. Based on the requirements of ACCEL, a prototype LLRF platform has been developed, and the control schemes have been proposed. The prototype LLRF system demonstrated magnitude and phase fluctuation levels below 1% and 1° on the flattop of a 2 μs RF pulse. The LLRF control schemes proposed for ACCEL are implemented with a prototype hardware platform. In conclusion, this paper will introduce the new compact LLRF solution and summarize a selection of experimental test results of the prototype itself and with the accelerating structure cavities designed for ACCEL.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); Defense Advanced Research Projects Agency (DARPA)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
2999039
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 9 Vol. 96; ISSN 1089-7623; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (9)

Next Generation LLRF Control Platform for Compact C-band Linear Accelerator journal January 2024
High-power test of a C-band linear accelerating structure with an RFSoC-based LLRF system journal April 2025
A “Cool” route to the Higgs boson and beyond. The Cool Copper Collider journal July 2023
Status and future plans for C3 R&D journal September 2023
Characterizing the performance of high-speed data converters for RFSoC-based radio astronomy receivers journal December 2020
RF Control Optimization and Automation for Normal Conducting Linear Accelerators journal January 2017
Advanced RFSoC readout for space-based superconducting sensor arrays
  • Henderson, Shawn W.; Ahmed, Zeeshan; D'Ewart, John M.
  • Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI https://doi.org/10.1117/12.2630412
conference August 2022
Development of RFSoC-based direct sampling highly multiplexed microwave SQUID readout for CMB and submillimeter surveys
  • Liu, Chao; Ahmed, Zeeshan; Henderson, Shawn W.
  • Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII https://doi.org/10.1117/12.3019317
conference August 2024
Evaluating Direct RF Sampling Performance for RFSoC-based Radio-frequency Astronomy Receivers conference January 2023

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