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| MOXB02 | First Results of the IOTA Ring Research at Fermilab | 19 |
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Funding: Fermilab is operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. The IOTA ring at Fermilab is a unique machine exclusively dedicated to accelerator beam physics R&D. The research conducted at IOTA includes topics such as nonlinear integrable optics, suppression of coherent beam instabilities, optical stochastic cooling and quantum science experiments. In this talk we report on the first results of experiments with implementations of nonlinear integrable beam optics. The first of its kind practical realization of a two-dimensional integrable system in a strongly-focusing storage ring was demonstrated allowing among other things for stable beam circulation near or at the integer resonance. Also presented will be the highlights of the world’s first demonstration of optical stochastic beam cooling and other selected results of IOTA’s broad experimental program. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOXB02 | |
| About • | paper received ※ 20 May 2021 paper accepted ※ 02 July 2021 issue date ※ 23 August 2021 | |
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| TUPAB146 | High Brightness Electron Beams from Dragon Tail Injection and the E-312 Experiment at FACET-II | 1728 |
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Funding: This work was performed with support of the US Department of Energy under Contract No. DE-SC0009914 The advent of optically triggered injection in multi component plasma wakefield accelerators has been shown to enable a substantial increase in witness electron beam quality. Here we present a novel way of using the overlap of laser and beam radial fields to locally liberate electrons from the tunneling ionization of the non-ionized gas species. These liberated ultracold electrons gain sufficient energy to be trapped in the accelerating phase at the back of the plasma blowout. This method of controlled injection has advantages in precision timing since injection is locked to peak beam current and has the potential of generating beams with very low emittance and energy spread. This method has been investigated using particle-in-cell (PIC) simulations. This scenario corresponds to a planned experiment, E-312, at SLAC’s FACET-II facility. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB146 | |
| About • | paper received ※ 20 May 2021 paper accepted ※ 01 July 2021 issue date ※ 22 August 2021 | |
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| TUPAB177 | Simulating Magnetized Electron Cooling for EIC with JSPEC | 1813 |
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We present a possible electron cooling configuration for the proposed Electron Ion Collider (EIC) facility, developed using a Nelder-Mead Simplex optimization procedure built into JSPEC, an electron cooling code developed at Jefferson Lab. We show the time evolution of the emittance of the ion beam in the presence of this cooler evaluated assuming the ion distribution remains Gaussian. We also show that bi-gaussian distributions emerge in simulations of ion macro-particles. We show how intra-beam scattering can be treated with a core-tail model in simulations of ion macro-particles. The Sirepo/JSPEC* and Sirepo/Jupyter** apps will be presented, with instructions enabling the community to reproduce our simulations.
* https://www.sirepo.com/jspec ** https://www.sirepo.com/jupyter |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB177 | |
| About • | paper received ※ 19 May 2021 paper accepted ※ 15 June 2021 issue date ※ 16 August 2021 | |
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| TUPAB413 | Rapid Browser-Based Visualization of Large Neutron Scattering Datasets | 2494 |
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Funding: This work is supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under Award No. DE-SC0021551. Neutron scattering makes invaluable contributions to the physical, chemical, and nanostructured materials sciences. Single crystal diffraction experiments collect volumetric scattering data sets representing the internal structure relations by combining datasets of many individual settings at different orientations, times and sample environment conditions. In particular, we consider data from the single-crystal diffraction experiments at ORNL.* A new technical approach for rapid, interactive visualization of remote neutron data is being explored. The NVIDIA IndeX 3D volumetric visualization framework** is being used via the HTML5 client viewer from NVIDIA, the ParaView plugin***, and new Jupyter notebooks, which will be released to the community with an open source license. * L. Coates et al., Rev. Sci. Instrum. 89, 092802 (2018). ** https://developer.nvidia.com/nvidia-index *** https://blog.kitware.com/nvidia-index-plugin-in-paraview-5-5 |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB413 | |
| About • | paper received ※ 18 May 2021 paper accepted ※ 21 July 2021 issue date ※ 26 August 2021 | |
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WEIX02 |
Effective Software Collaboration Between Industry and National Labs | |
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| The development and implementation of algorithms is a core competency of universities and research labs; however, the resulting codes can be difficult to use and expensive to maintain. Professional software developers could help to resolve the problem, but they are expensive to hire and difficult to retain. Retention difficulties and associated career pipeline problems are due in part to misaligned incentives. For example, making software sustainable and easy-to-use is orthogonal to publishing in academic journals and, perhaps more problematic, the scientific mission of national laboratories and university departments often does not motivate software developers and data scientists sufficiently to retain them. In contrast, software sustainability and ease-of-use are core competencies of software developers in industry. Hence, it is advantageous for national laboratories and universities to actively and routinely collaborate with industry. This more varied range of employment opportunities and internal institutional incentives will also offer possibilities for more varied career paths and, perhaps, better retention of talented individuals within the community. | ||
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