1 citations · 1 across the 9 of their papers we have counts for
9 papers
ALS-U AR RF Equipment Protection System
Najm Us Saqib, Christopher Toy, Qiang Du +5
This paper presents the design and status of Accumulator Ring (AR) RF Equipment Protection System (EPS) of Advanced Light Source Upgrade project at LBNL. The key components of AR R…
RFSoC Based LLRF System Design at ALS
Qiang Du, Shreeharshini Murthy, Victoria Moore +5
The Advanced Light Source (ALS) at LBNL is upgrading several LLRF systems for its Linac and Sub-Harmonic Bunchers, where it is desired to have a unified LLRF system design to suppo…
Obvious and non-obvious aspects of digital Self-Excited-Loops for SRF cavity control
Larry Doolittle, Shreeharshini Murthy, Matei Guran +3
In 1978, Delayen showed how Self-Excited Loops (SEL) can be used to great advantage for controlling narrow-band SRF cavities. Its key capability is establishing closed-loop amplitu…
Comparative Evaluation of Xilinx RFSoC Platform for Low-Level RF Systems
Shreeharshini Dharanesh Murthy, Victoria Moore, Qiang Du +5
The rapid advancement of Radio Frequency System-onChip (RFSoC) technology from Xilinx (AMD) has enabled the integration of high-speed data converters and programmable logic within…
Digital Low-Level RF system for the Linac Electronics Modernization Plan at LCLS
Nashat Sawai, Jorge Diaz Cruz, Andy Benwell +4
The LCLS began operations in 2009, utilizing SLAC's normal-conducting (NC) LINAC, which features control equipment dating back to the 1960s and 1980s. The Linac Electronics Moderni…
Drift Observations and Mitigation in LCLS-II RF
L. Doolittle, S. D. Murthy, A. Benwell +6
The LCLS-II RF system physically spans ~700m and has strict requirements -- on the order of 20 fs -- on the phase stability of the accelerating RF fields in its SRF linac. While ea…
Dual frequency master oscillator generation and distribution for ALS and ALS-U
Shreeharshini Dharanesh Murthy, Angel Jurado, Michael Betz +2
The ongoing work to upgrade ALS to ALS-U demands strict RF requirements such as low jitter and low spurs frequency reference to meet its accelerator and science goals. A low phase…
Installation, Commissioning and Performance of Phase Reference Line for LCLS-II
Shreeharshini Dharanesh Murthy, Lawrence Doolittle, Charlie Xu +3
Any cavity controller for a distributed system needs a Phase Reference Line (PRL) signal from which to define phases of a cavity field measurement. The LCLS-II PRL system at SLAC p…
Analog Cavity Emulators to Support LLRF Development
Shreeharshini Dharanesh Murthy, Lawrence Doolittle, Andrew Benwell
The goal of a LLRF system is to control an actual RF cavity with beam. While digital simulations have a place, having an analog circuit to stand in for the cavity can be tremendous…