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@inproceedings{varghese:ipac2021-thpab338,
author = {P. Varghese and B.E. Chase and L.R. Doolittle and P.M. Hanlet and H. Maniar and D.J. Nicklaus and C. Serrano},
% author = {P. Varghese and B.E. Chase and L.R. Doolittle and P.M. Hanlet and H. Maniar and D.J. Nicklaus and others},
% author = {P. Varghese and others},
title = {{Performance of the LLRF System for the Fermilab PIP-II Injector Test}},
booktitle = {Proc. IPAC'21},
pages = {4450--4453},
eid = {THPAB338},
language = {english},
keywords = {cavity, controls, LLRF, resonance, cryomodule},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-THPAB338},
url = {https://jacow.org/ipac2021/papers/thpab338.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-THPAB338},
abstract = {{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.}},
}