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MOCOYBS01 |
PERLE: A High Power Energy Recovery Facility at Orsay |
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- W. Kaabi
Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
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PERLE is a proposed high power Energy Recovery Linac, designed on multi-turn configuration, based on SRF technology, to be hosted at Orsay-France in a collaborative effort between local laboratories: LAL and IPNO, together with an international collaboration involving today: CERN, JLAB, AsTEC Daresbury, Liverpool University and BINP Novosibirsk. A part from its experimental program, PERLE will be a unique leading edge facility designed to push advances in accelerator technology, to provide intense and highly flexible test beams for component development. In its final configuration, PERLE provides a 500 MeV electron beam using high current (20 mA) acceleration during three passes through 801.6 MHz cavities. This presentation outlines the Status and further plans of the project.
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Slides MOCOYBS01 [9.680 MB]
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MOCOYBS02 |
A Hard X-Ray FEL and Nuclear Physics Facility Based on a Multi-Pass Recirculating Superconducting CW Linac with Energy Recovery |
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- P.H. Williams
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
- P.H. Williams
Cockcroft Institute, Warrington, Cheshire, United Kingdom
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A multi-pass recirculating superconducting CW linac offers a cost effective path to a multi-user facility with unprecedented scientific and industrial reach over a wide range of disciplines. We propose such a facility to be constructed in stages. The first stage constitutes an option for a potential UK-XFEL; the linac will simultaneously drive a suite of short wavelength Free Electron Lasers (FELs) capable of providing high average power (MHz repetition rate) at up to 10 keV photons and high pulse energy (3 mJ) 25 keV photons. The system architecture is chosen to enable additional coherent sources at longer wavelengths, depending on community need. In later stages the scope of the project expands; we propose beam transport modifications to enable operation in Energy Recovery mode. This enables multi-MHz FEL sources, e.g. an X-ray FEL oscillator. Combining with lasers and / or self-interaction will provide access to MeV and GeV gamma-rays via inverse Compton scattering at high average power. Opportunities are also created for internal target and fixed target experiments. We explore possible system architectures and outline a path to confirm feasibility through experiments.
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Slides MOCOYBS02 [3.231 MB]
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MOCOYBS03 |
Nuclear Photonics with an ERL-Based Hard X-Ray Source |
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- N. Pietralla
TU Darmstadt, Darmstadt, Germany
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Funding: Supported by DFG under grants GRK 2128 and SFB 1245, by BMBF under grant 05P18RDEN9, and by the LOEWE initiative of the State of Hesse under grant "Nuclear Photonics".
Electromagnetic (EM) coupling is small compared to hadronic interaction. Reaction cross sections of EM probes with nuclei can be, therefore, calculated perturbatively and are in principle under control to any desired precision. EM probes are, thus, well appreciated for being best suited for precision studies of nuclear structure. They have significantly contributed to our understanding of nuclear structure physics through a vast amount of precision data in the past. Accelerator technology and instrumentation have been advanced in recent years. Hard X-ray sources based on Compton scattering of laser beams on intense electron beams were developed and provide quasi-monochromatic, energy-tunable, fully polarized gamma-ray beams for photonuclear reactions. This opens up the new field of "Nuclear Photonics". Fundamentals of photonuclear reactions will be discussed. Examples for photonuclear reactions from the superconducting Darmstadt linear electron accelerator, S-DALINAC, [1, 2] and from the High-Intensity gamma-ray Source (HIgS) at Duke Univ. will be provided [3, 4]. We will dare an outlook to future opportunities for Nuclear Photonics at ERL-based hard X-ray sources.
[1] N. Pietralla, Nucl. Phys. News 28, 4 (2018).
[2] C. Kremer et al., Phys. Rev. Lett. 117, 172503 (2016).
[3] T. Beck et al., Phys. Rev. Lett. 118, 212502 (2017).
[4] J. Isaak et al., submitted.
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Slides MOCOYBS03 [6.458 MB]
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| MOCOYBS04 |
Electrodisintegration of 16O and the Rate Determination of the Radiative Alpha Capture on 12C at Stellar Energies |
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- I. Friščić, T.W. Donnelly, R. Milner
MIT, Cambridge, Massachusetts, USA
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Funding: This research is supported by the U.S. Department of Energy Office of Nuclear Physics (Grant No. DE-FG02-94ER40818)
For over five decades one of the most important goals of experimental nuclear astrophysics has been to reduce the uncertainty in the S-factor of radiative alpha capture on 12C at stellar energies. We have developed a simple model, which relates the radiative capture reaction and the exclusive electrodisintegration reaction. We then show that by measuring the rate of electrodisintegration of 16O in a high luminosity experiment using a state-of-the-art gas target and a new generation of energy-recovery linear (ERL) electron accelerators under development, it is possible to significantly improve the statistical uncertainty of the radiative alpha capture on 12C in terms of E1 and E2 S-factors in the astrophysically interesting region, which are the key inputs for any nucleosynthesis and stellar evolution models. The model needs to be validated experimentally, but, if successful, it can be used to improve the precision of other astrophysically-relevant, radiative capture reactions, thus opening a significant avenue of research that spans nuclear structure, astrophysics and high-power accelerator technology.
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Slides MOCOYBS04 [4.003 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-ERL2019-MOCOYBS04
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| About • |
paper received ※ 15 September 2019 paper accepted ※ 04 November 2019 issue date ※ 24 June 2020 |
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