Ed Cullerton
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View article: Electronic Systems for Proposed Anti-Proton Source Accumulator Core Betatron Systems
Electronic Systems for Proposed Anti-Proton Source Accumulator Core Betatron Systems Open
New waveguide pickups and kickers have been proposed for the accumulator core betatron systems. With new waveguide components, the electronics of the system have to be redesigned. The waveguide components have new frequency bands and power…
View article: LCSL-II Cryomodule Testing at Fermilab
LCSL-II Cryomodule Testing at Fermilab Open
Cold powered testing of all LCLS-II production cryomodules at Fermilab is complete as of February 2021. A total of twenty-five tests on both 1.3 GHz and 3.9 GHz cryomodules were conducted over a nearly five year time span beginning in the …
View article: Experience With LCLS-II Cryomodule Testing at Fermilab
Experience With LCLS-II Cryomodule Testing at Fermilab Open
The Cryomodule Test Stand (CMTS1) at Fermilab has been engaged with testing 8-cavity 1.3 GHz cryomodules designed and assembled for the LCLS-II project at SLAC National Accelerator Laboratory since 2016. Over these three years twenty cryom…
View article: Preliminary Design of Mu2E Spill Regulation System (SRS)
Preliminary Design of Mu2E Spill Regulation System (SRS) Open
Direct µ->e conversion requires resonant extraction of a stream of pulsed beam, comprised of short micro-bunches (pulses) from the Delivery ring (DR) to the Mu2e target. Experimental needs and radiation protection apply strict requirements…
View article: LCLS-II Gun/Buncher LLRF System Design
LCLS-II Gun/Buncher LLRF System Design Open
For a free electron laser, the stability of injector is critical to the final electron beam parameters, e.g., beam energy, beam arrival time, and eventually it determines the photon quality. The LCLS-II project's injector contains a VHF co…
View article: RF Controls for High-Q Cavities for the LCLS-II
RF Controls for High-Q Cavities for the LCLS-II Open
The SLAC National Accelerator Laboratory is building LCLS-II, a new 4 GeV CW superconducting (SCRF) Linac as a major upgrade of the existing LCLS. The LCLS-II Low-Level Radio Frequency (LLRF) collaboration is a multi-lab effort within the …
View article: Performance of the First LCLS-II Cryomodules: Issues and Solutions
Performance of the First LCLS-II Cryomodules: Issues and Solutions Open
LCLS-II 4 GeV linac is on the middle production stage. Linac contains 40 cryomodules of 1.3 GHz and 3 cryomodules of 3.9 GHz, including spares. Fermilab and JLAB share responsibility for cryomodule design, assembly and test. Paper will ove…
View article: Design and Implementation of the LLRF System for LCLS-II
Design and Implementation of the LLRF System for LCLS-II Open
The SLAC National Accelerator Laboratory is building LCLS-II, a new 4 GeV CW superconducting (SCRF) linac as a major upgrade of the existing LCLS. The SCRF linac consists of 35 ILC style cryomodules (eight cavities each) for a total of 280…
View article: High Precision RF Control for SRF Cavities in LCLS-II
High Precision RF Control for SRF Cavities in LCLS-II Open
The unique properties of SRF cavities enable a new generation of X-ray light sources in XFEL and LCLS-II. The LCLS-II design calls for 280 L-band cavities to be operated in CW mode with a Q_{L} of 4x10⁷, using Single-Source Single-Cavity c…
View article: Commissioning and First Results from the Fermilab Cryomodule Test Stand
Commissioning and First Results from the Fermilab Cryomodule Test Stand Open
A new test stand dedicated to SRF cryomodule testing, CMTS1, has been commissioned and is now in operation at Fermilab. The first device to be cooled down and powered in this facility is the prototype 1.3 GHz cryomodule assembled at Fermil…
View article: High Precision RF Control for the LCLS-II
High Precision RF Control for the LCLS-II Open
The LCLS-II is a CW superconducting linac under construction to drive an X-ray FEL. The energy and timing stability requirements of the FEL drive the need for very high precision RF control. This paper summarize the design considerations a…
View article: Updates to the Low-Level RF Architecture for Fermilab
Updates to the Low-Level RF Architecture for Fermilab Open
Fermilab has teamed with Colorado State University on several projects in LLRF controls and architecture. These projects include new LLRF hardware, updated controls techniques, and new system architectures. Here we present a summary of our…
View article: LLRF Control of High Loaded-Q Cavities for the LCLS-II
LLRF Control of High Loaded-Q Cavities for the LCLS-II Open
The SLAC National Accelerator Laboratory is planning an upgrade (LCLS-II) to the Linear Coherent Light Source with a 4 GeV CW Superconducting Radio Frequency (SCRF) linac. The nature of the machine places stringent requirements in the Low-…