Performance of the LLRF System for the Fermilab PIP-II Injector Test

Conference · Tue Aug 10 04:00:00 EDT 2021

DOI:https://doi.org/10.18429/JACoW-IPAC2021-THPAB338· OSTI ID:1854819

Varghese, Philip ^[1]; Chase, Brian ^[1]; Doolittle, Lawrence ^[2]; Hanlet, Pierrick ^[1]; Maniar, Harsh ^[1]; Nicklaus, Dennis ^[1]; Serrano, Carlos ^[2]

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1. Fermilab
2. LBNL, Berkeley

PIP-II IT is a test facility for the PIP-II project where the injector, warm front-end, and the first two superconducting cryomodules are being tested. The 8-cavity half-wave-resonator (HWR) cryomodule operating at 162.5 MHz is followed by the 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. The resonance control systems for the two cryomodules are quite different, the first being a pneumatic system based on helium pressure and the latter a piezo/stepper motor type control. The data acquisition and control system can support both CW and Pulsed mode operations. 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 has progressed to the point of being ready for a 2 mA beam to be accelerated to 25 MeV. The design and performance of the field control and resonance control system operation with beam are presented in this paper.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1854819
• Report Number(s): FERMILAB-CONF-21-818-AD; oai:inspirehep.net:2019419
• Country of Publication: United States
• Language: English

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