5 papers
LLRF System Analysis for the Fermilab PIP-II Superconducting LINAC
P. Varghese, S. Raman, M. Guran +4
PIP-II is a superconducting linac that is in the initial acceleration chain for the Fermilab accelerator complex. The RF system consists of a warm front-end with an RFQ and buncher…
Testing the DAE LLRF system with a PIP-II SSR2 Cavity
R. Nasery, P. Varghese, S. Raman +3
The PIP-II linac is an international collaboration project with in kind contributions of key subsystems from multiple countries including India (DAE). In the research and developme…
Compensating for Amplifier Non-Linearity in a SEL Controller
S. Raman, P. Varghese, L. Reyes +4
The Self-Excited Loop (SEL) architecture, used in some continuous-wave (CW) superconducting linacs, relies on a positive feedback mechanism that requires carefully defined operatin…
Closed Loop Testing of Microphonics Algorithms Using a Cavity Emulator
S. Raman, P. Varghese, B. Chase +4
An analog crystal filter based cavity emulator is modified with reverse biased varactor diodes to provide a tuning range of around 160 Hz. The piezo drive voltage of the resonance…
LLRF System for the Fermilab PIP-II Superconducting LINAC
P. Varghese, B. Chase, E. Cullerton +4
PIP-II is an 800 MEV superconducting linac that is in the initial acceleration chain for the Fermilab accelerator complex. The RF system consists of a warm front-end with an ion so…