Oct 9 – 13, 2022
FHNW Campus Brugg-Windisch
Europe/Zurich timezone

Fermilab PIP-II Injector Test - LLRF System Design and Performance

Oct 13, 2022, 9:10 AM
Aula (Building 3)


Building 3

Oral Low Level RF Workshop 2022 Superconducting RF


P. Varghese (Fermi National Accelerator Laboratory(FNAL))


PIP-II IT is a test facility for the PIP-II project where the injector, warm front-end and the first two superconducting cryomodules were tested. The warm front-end consists of an Ion source, an RFQ and three buncher cavities. The superconducting cryomodules consist of an 8-cavity half-wave-resonator(HWR) cryomodule operating at 162.5 MHz followed by an 8-cavity single-spoke resonator(SSR1) cryomodule operating at 325 MHz. The LLRF systems for both cryomodules are based on a common SOC FPGA based hardware platform. Resonance control for the HWR is provided by a pneumatic system based on helium pressure, while the SSR1 cryomodule uses a piezo/stepper motor type control. The data acquisition and control system can support both CW and Pulsed mode operation. Beam loading compensation is available which can be used for both manual/automatic control in the LLRF system. The user interfaces include EPICS, Labview and ACNET. Testing of the RF system with 2 mA beam accelerated to 20 MeV has been completed.. The design and performance of the field control and resonance control system operation with beam are presented in this paper.

Primary author

P. Varghese (Fermi National Accelerator Laboratory(FNAL))


B. Chase (Fermi National Accelerator Laboratory(FNAL)) S. Raman (Fermi National Accelerator Laboratory(FNAL)) P. Hanlet (Fermi National Accelerator Laboratory(FNAL)) D. Nicklaus (Fermi National Accelerator Laboratory(FNAL)) A. Syed (Fermi National Accelerator Laboratory(FNAL)) L. Doolittle (Lawrence Berkeley National Laboratory(LBNL)) C. Serrano (Lawrence Berkeley National Laboratory(LBNL))

Presentation materials