3 papers
physics.acc-ph2025
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…
physics.acc-ph2025
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…
physics.acc-ph2023
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…