Paper |
Title |
Page |
THPGW037 |
Hybrid Yb/Nd Laser System for RF Gun in SuperKEKB Phase II and Phase III Commissioning |
3663 |
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- R. Zhang, Y. Honda, M. Yoshida, X. Zhou
KEK, Ibaraki, Japan
- H.K. Kumano, N. Toyotomi
Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
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SuperEKKB phase II commissioning has been finished in the summer of 2018. By use of Ytterbium doped fiber and Nd:YAG hybrid laser system, 2.3 nC electron beam with low emittance has been achieved at the end of linac, which is generated by RF gun. The electron beam is injected and stored in High Energy Ring successfully. Basing on these operation experiences, the Nd:YAG laser system will be used for the early stages of SuperKEKB phase III commissioning. After the update of laser system during 2018 summer maintenance, about 5.3 nC electron charge is generated by RF gun. Beside this, the laser spatial and temporal reshaping experiment has been being done in order to realize the electron beam with low emittance and low energy spread. Meanwhile, a perspective towards the next step Yb:YAG laser system is also introduced in this paper.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-THPGW037
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About • |
paper received ※ 13 May 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019 |
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THPGW054 |
Generation and Delivery of an Ultraviolet Laser Beam for the RF-Photoinjector of the Awake Electron Beam |
3709 |
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- V. Fedosseev, F. Batsch, C. Capelli, E. Chevallay, N. Chritin, S. Döbert, T. Feniet, F. Friebel, P. Gander, E. Granados, E. Gschwendtner, J. Hansen, C. Heßler, H. Panuganti, K.A. Szczurek
CERN, Meyrin, Switzerland
- M. Hüther, M. Martyanov, J.T. Moody, P. Muggli
MPI-P, München, Germany
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In the AWAKE experiment, the electron beam is used to probe the proton-driven wakefield acceleration in a 10 m long rubidium vapor source. Electron bunches are produced using an RF-gun equipped with a Cs2Te photocathode illuminated by an ultraviolet (UV) laser pulse. To generate the UV laser beam a fraction of the infrared (IR) laser beam used for ionization of rubidium is extracted from the laser system, time-compressed to a picosecond scale and frequency tripled using nonlinear crystals. The transport line of the laser beam over the 20 m distance was built using rigid supports for mirrors and air-evacuated tube to prevent any possible beam pointing instabilities due to vibrations and air convection. Construction of the UV beam optical system enables appropriate beam shaping and control of its size and position on the cathode, as well as time delay with respect to the IR pulse, i.e. with respect to the plasma wakefield seeder. In this paper, we present the design of the UV beam line and results of its commissioning regarding IR/UV conversion, beam pointing stability, and means of beam control and monitoring.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-THPGW054
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About • |
paper received ※ 14 May 2019 paper accepted ※ 18 May 2019 issue date ※ 21 June 2019 |
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FRYPLM2 |
Lasers for Novel Accelerators |
4385 |
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- L.A. Gizzi, P. Koester, L. Labate, G. Toci, M. Vannini
INO-CNR, Pisa, Italy
- F. Mathieu
LULI, Palaiseau, France
- Z. Mazzotta
ARCNL, Amsterdam, The Netherlands
- Z. Mazzotta
Ecole Polytechnique, Palaiseau, France
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Significant progress has been made over the last decade in optical laser performance including repetition rate, average and peak power, and laser-system footprint making these systems attractive for many applications including novel accelerators. Most novel acceleration schemes require high-power lasers. The talk will present drive laser requirements for current novel accelerator schemes, industry plans to meet these requirements, and the future for high-power lasers.
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Slides FRYPLM2 [32.406 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-FRYPLM2
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About • |
paper received ※ 08 April 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019 |
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