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TUPOPT038 | FAST-GREENS: A High Efficiency Free Electron Laser Driven by Superconducting RF Accelerator | 1094 |
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Funding: This work is supported by DOE grants DE-SC0017102, DE-SC0018559 and DE-SC0009914 In this paper we’ll describe the FAST-GREENS experimental program where a 4 m-long strongly tapered helical undulator with a seeded prebuncher is used in the high gain TESSA regime to convert a significant fraction (up to 10 %) of energy from the 240 MeV electron beam from the FAST linac to coherent 515 nm radiation. We’ll also discuss the longer term plans for the setup where by embedding the undulator in an optical cavity matched with the high repetition rate from the superconducting accelerator (3,9 MHz), a very high average power laser source can be obtained. Eventually, the laser pulses can be redirected onto the relativistic electrons to generate by inverse compton scattering a very high flux of circularly polarized gamma rays for polarized positron production. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOPT038 | |
About • | Received ※ 09 June 2022 — Revised ※ 12 June 2022 — Accepted ※ 12 June 2022 — Issue date ※ 02 July 2022 | |
Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
THPOPT036 | New Microwave Thermionic Electron Gun for APS Upgrade: Test Results and Operation Experience | 2665 |
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Funding: This work was supported by the U.S. Department of Energy, Office of Basic Energy Science, under contracts DE-SC0015191 and DE- AC02-06CH11357 Recently, RadiaBeam has designed and built a robust thermionic RF gun with optimized electromagnetic per-formance, improved thermal engineering, and a robust cathode mounting technique. This gun allows to improve the performance of existing and future light sources, industrial accelerators, and electron beam driven te-rahertz sources. Unlike conventional electrically or side-coupled RF guns, this new gun operates in ’-mode with the help of magnetic coupling holes. Such a design al-lows operation at longer pulses and has negligible dipole and quadrupole components. The gun prototype was built, then installed and tested at the Advanced Photon Source (APS) injector. This paper presents the results of high power and beam tests of this RF gun, and operation-al experience at APS to this moment. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-THPOPT036 | |
About • | Received ※ 31 May 2022 — Revised ※ 10 June 2022 — Accepted ※ 17 June 2022 — Issue date ※ 27 June 2022 | |
Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |