Author: Ainsworth, R.
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MOPOY010 Simulations and Measurements of Stopbands in the Fermilab Recycler 864
  • R. Ainsworth, P. Adamson, K.J. Hazelwood, I. Kourbanis, E.G. Stern
    Fermilab, Batavia, Illinois, USA
  Fermilab has recently completed an upgrade to the complex with the goal of delivering 700 kW of beam power as 120 GeV protons to the NuMI target. A major part of boosting beam power is to use the Fermilab Recycler to stack protons. Simulations focusing on the betatron resonance stopbands are presented taking into account different effects such as intensity and chromaticity. Simulations are compared with measurements.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY010  
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MOPOY011 Estimating the Transverse Impedance in the Fermilab Recycler 867
  • R. Ainsworth, P. Adamson, A.V. Burov, I. Kourbanis, M.-J. Yang
    Fermilab, Batavia, Illinois, USA
  Impedance could represent a limitation of running high intensity bunches in the Fermilab recycler. With high intensity upgrades foreseen, it is important to quantify the impedance. To do this, studies have been performed measuring the tune shift as a function of bunch intensity allowing the transverse impedance to be derived.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY011  
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MOPOY012 Space Charge Simulations in the Fermilab Recycler for PIP-II 870
  • R. Ainsworth, P. Adamson, I. Kourbanis, E.G. Stern
    Fermilab, Batavia, Illinois, USA
  Proton Improvement Plan-II (PIP-II) is Fermilab's plan for providing powerful, high-intensity proton beams to the laboratory's experiments. Upgrades are foreseen for the recycler which will cope with bunches containing fifty percent more beam. Of particular concern is large space charge tune shifts caused by the intensity increase. Simulations performed using Synergia are detailed focusing on the space charge footprint.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY012  
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TUPOW040 UH-FLUX: Compact, Energy Efficient Superconducting Asymmetric Energy Recovery LINAC for Ultra-high Fluxes of X-ray and THz Radiation 1847
  • I.V. Konoplev, A. Seryi
    JAI, Oxford, United Kingdom
  • R. Ainsworth
    Fermilab, Batavia, Illinois, USA
  • G. Burt
    Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
  Funding: This work was supported (in part) by The Leverhulme Trust through the International Network Grant IN-2015-012.
The conventional ERLs have limited peak beam current because increasing the beam charge and repetition rate leads to appearance of the beam break-up instabilities. At this stage the highest current, from the SRF ERL, is around 300 mA. A single turn (the beam will be transported through the accelerating section, interaction point and deceleration section of the AERL only once) Asymmetric Energy Recovery LINAC (AERL) is proposed. The RF cells in different sections of the cavity are tuned in such a way that only operating mode is uniform inside all of the cells. The AERL will drive the electron beams with typical energies of 10 - 30 MeV and peak currents above 1 A, enabling the generation of high flux UV/X-rays and high power coherent THz radiation. We aim to build a copper prototype of the RF cavity for a compact AERL to study its EM properties. The final goal is to build AERL based on the superconducting RF cavity. Preliminary design for AERL's cavity has been developed and will be presented. The results of numerical and analytical models and the next steps toward the AERL operation will also be discussed.
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOW040  
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