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Oct 12 – 16, 2025
Newport News Marriott at City Center
US/Eastern timezone

Compensating for Amplifier Non-Linearity in a SEL Controller

Oct 14, 2025, 9:25 AM
20m
Oral

Speaker

Shrividhyaa Sankar Raman (Fermilab)

Description

The SEL architecture used commonly in CW superconducting linacs is a positive feedback system that requires determining the correct limits for the operating conditions to ensure stable operation. These limits are determined from the results of the amplifier calibration which characterizes the dac drive(forward power) against the cavity field. When the amplifier non-linearity precludes a simple linear fit for this characteristic, its modification to account for the amplifiers non-linearity is essential to operate the system in the SEL architecture. This process is described with test data from a 32kW SSA for the PIP-II linac.

Abstract Category System and Operation

Author

Shrividhyaa Sankar Raman (Fermilab)

Co-authors

Dr Philip Varghese (Fermilab) Matei Guran Lennon Reyes (Fermilab)

Presentation materials