Brandon Cathey
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View article: Thermionic Sources for Electron Cooling at IOTA
Thermionic Sources for Electron Cooling at IOTA Open
We are designing and fabricating two new thermionic sources of magnetized electrons for use in the electron lens project in the Integrable Optics Test Accelerator (IOTA) at Fermilab. These electron sources will be used for cooling 2.5 MeV …
View article: Commissioning of the Low Energy Electron Gun Test Stand at the University of Chicago
Commissioning of the Low Energy Electron Gun Test Stand at the University of Chicago Open
We built a test stand for evaluating the performance of the thermionic electron sources for the electron lens project at the Integrable Optics Test Accelerator (IOTA) in Fermilab. The lens will be used to study nonlinear dynamics and elect…
View article: Incoherent Dynamics of Intense Proton Beams under Electron Cooling
Incoherent Dynamics of Intense Proton Beams under Electron Cooling Open
The minimum emittance of ion beams achieved using electron cooling is limited by the heating processes of Intra Beam Scattering and diffusion driven by resonance crossing of particles due to space-charge. We describe a new experiment to ex…
View article: Beam physics research with the IOTA electron lens
Beam physics research with the IOTA electron lens Open
The electron lens in the Fermilab Integrable Optics Test Accelerator (IOTA) will enable new research in nonlinear integrable optics, space-charge compensation, electron cooling, and the stability of intense beams. This research addresses s…
View article: Calculations of detuning with amplitude for the McMillan electron lens in the Fermilab Integrable Optics Test Accelerator (IOTA)
Calculations of detuning with amplitude for the McMillan electron lens in the Fermilab Integrable Optics Test Accelerator (IOTA) Open
The McMillan electron lens will be one of the experimental implementations of nonlinear integrable lattices in the Fermilab Integrable Optics Test Accelerator (IOTA). We describe the physics of the nonlinear McMillan lens and calculate the…
View article: Progress on the Electron Gun Design for a McMillan Electron Lens in the Fermilab Integrable Optics Test Accelerator (IOTA)
Progress on the Electron Gun Design for a McMillan Electron Lens in the Fermilab Integrable Optics Test Accelerator (IOTA) Open
This paper covers the progress made so far in designing the first McMillan electron lens for the Fermilab IOTA ring. The novel design allows for an increase in tune spread without limiting the dynamic aperture due to its integrability. Sho…
View article: First Results of the IOTA Ring Research at Fermilab
First Results of the IOTA Ring Research at Fermilab Open
The IOTA ring at Fermilab is a unique machine exclusively dedicated to accelerator beam physics R The research conducted at IOTA includes topics such as nonlinear integrable optics, suppression of coherent beam instabilities, optical stoch…
View article: First Six Dimensional Phase Space Measurement of an Accelerator Beam
First Six Dimensional Phase Space Measurement of an Accelerator Beam Open
This Letter presents the first complete six dimensional phase space measurement of a beam in an accelerator. The measurement was made on the Spallation Neutron Source Beam Test Facility. The data reveal previously unknown correlations in t…
View article: Technical Workings of the 6D Phase Measurement at SNS
Technical Workings of the 6D Phase Measurement at SNS Open
The Beam Test Facility (BTF) is a functional duplicate of the Spallation Neutron Source (SNS) frontend with a 2.5 MeV beam on which the first six-dimensional phase space measurement has been completed. This presentation will show the techn…
View article: 6D Beam Measurement, Challenges and Possibilities
6D Beam Measurement, Challenges and Possibilities Open
A system to measure the full 6D beam parameters (not 3x2D) has been built at the SNS RFQ test stand. Such a measurement will allow detailed analysis of the beam physics from a properly measured input term. This invited provides an overview…
View article: Results From the 6D Diagnostics Test Bench at SNS
Results From the 6D Diagnostics Test Bench at SNS Open
This paper presents the method and results for measuring the full six-dimensional phase space of a low energy, high intensity hadron beam. This was done by combining four-dimensional emittance measurement techniques along with dispersion m…
View article: Commissioning of the New SNS RFQ and 2.5MeV Beam Test Facility
Commissioning of the New SNS RFQ and 2.5MeV Beam Test Facility Open
SNS injector uses a four-vane 402.5MHz RFQ for accelerating the H⁻ beam with 38mA peak current and 7% duty factor to 2.5MeV. The original RFQ, commissioned in 2002, has been able to support SNS operation up to the design average beam power…
View article: 6D Phase Space Measurement of Low Energy, High Intensity Hadron Beam
6D Phase Space Measurement of Low Energy, High Intensity Hadron Beam Open
The goal of this experiment is to measure the full 6D phase space of a low energy, high intensity hadron beam. We use 4D emittance measurement techniques for the transverse plane combined with dispersion measurement and a beam shape monito…