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WEPOTK003 |
Status of the Development of the Electron Lens for Space Charge Compensation at GSI |
2027 |
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- K. Schulte-Urlichs, D. Ondreka, P.J. Spiller, K.I. Thoma
GSI, Darmstadt, Germany
- M. Droba, T. Dönges, O. Meusel, H. Podlech
IAP, Frankfurt am Main, Germany
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At GSI a prototype electron lens for space charge (SC) compensation is currently being designed and main components as the RF-modulated electron gun are already under commissioning. The goal of this project is the (partial) compensation of SC forces within the ion beam by an overlapping electron beam. This may help to increase the intensity of primary beams, especially in the FAIR facility and potentially all large synchrotrons operated at the SC limit. For an effective SC compensation, the generated electron beam needs to follow the transverse and longitudinal beam profile of the ion bunch structure. The requirements are maximum currents of 10 A and grid modulation to cover a broad frequency range from 400 kHz to 1 MHz. The RF-modulated electron gun was designed and manufactured in the scope of the ARIES collaboration and is currently being tested at the E-Lens Lab of Goethe University Frankfurt. A dedicated test bench was built for commissioning of the major e-lens components and diagnostics. In this contribution the overall set-up will be presented putting special emphasis on the beam dynamics and collector design as well as as well as simulation results of the electron gun.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2022-WEPOTK003
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About • |
Received ※ 18 May 2022 — Revised ※ 14 June 2022 — Accepted ※ 15 June 2022 — Issue date ※ 07 July 2022 |
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WEPOMS020 |
FAIR SIS100 Laser Cooling Pilot Facility |
2284 |
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- S. Klammes, T. Kühl, P.J. Spiller, T. Stöhlker, D.F.A. Winters
GSI, Darmstadt, Germany
- M.H. Bussmann, U. Schramm, M. Siebold
HZDR, Dresden, Germany
- M.H. Bussmann
CASUS, Görlitz, Germany
- J. Gumm, B. Langfeld, T. Walther
TU Darmstadt, Darmstadt, Germany
- V. Hannen, K. Ueberholz
Westfälische Wilhelms-Universität Münster, Institut für Kernphysik, Münster, Germany
- X. Ma, W.Q. Wen
IMP/CAS, Lanzhou, People’s Republic of China
- U. Schramm
TU Dresden, Dresden, Germany
- T. Stöhlker
HIJ, Jena, Germany
- T. Stöhlker
IOQ, Jena, Germany
- T. Walther
HFHF, Frankfurt am Main, Germany
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We present new (preliminary) results from a recent (May 2021) beam experiment for laser cooling of bunched relativistic carbon ion beams at the ESR of the GSI Helmholtz Centre in Darmstadt, Germany. We were able to use the new pulsed UV laser system from the TU Darmstadt, which has a very high repetition rate, a variable pulse duration and high UV power (up to 250 mW @ 257 nm). Using this laser, we have - for the first time - demonstrated laser cooling of bunched relativistic ion beams for different laser pulse durations (166-740 ps) at a ~10 MHz repetition rate. In addition, we could use the moveable in-vacuo (X)UV detection system from Münster University to study the fluorescence from the laser-excited ions. Finally, we have observed clear effects in the amount of detected fluorescence from the ions using our new ion bunch - laser pulse timing scheme. These studies are also highly relevant for the SIS100 laser cooling pilot facility, which is currently being realized at FAIR.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2022-WEPOMS020
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About • |
Received ※ 08 June 2022 — Revised ※ 11 June 2022 — Accepted ※ 15 June 2022 — Issue date ※ 13 June 2022 |
Cite • |
reference for this paper using
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※ LaTeX,
※ Text/Word,
※ RIS,
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