Paper | Title | Other Keywords | Page |
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MOPO006 | Crosstalk Effect in the LEReC Booster Cavity | cavity, booster, HOM, cathode | 47 |
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Funding: Work is supported by Brookhaven Science Associates, LLC under contract No. DE-AC02-98CH10886 with the US DOE. The Linac of Low Energy RHIC electron Cooler (LEReC) is designed to deliver a 1.6 MeV to 2.6 MeV electron beam, with peak-to-peak dp/p less than 7·10-4. The booster cavity is the major accelerating component in LEReC, which is a 0.4 cell cavity operating at 2 K, with a maximum energy gain of 2.2 MeV. It is modified from the Energy Recovery Linac (ERL) photocathode gun, with fundamental power coupler, pickup coupler and HOM coupler close to each other. Crosstalk effect in this cavity is simulated and measured. Correction method is proposed to meet the energy spread requirement. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO006 | ||
About • | paper received ※ 14 September 2018 paper accepted ※ 19 September 2018 issue date ※ 18 January 2019 | ||
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MOPO090 | Measurements of the First Room Temperature CH Cavity for MYRRHA at IAP Frankfurt | cavity, simulation, status, rfq | 193 |
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Funding: This work has been supported by MYRTE which is funded by the European Commission under Project-ID 662186. The MYRRHA (Multi-purpose hYbrid Research Reactor for High-tech Applications) Project is a planned accelerator driven system (ADS) for the transmutation of long-living radioactive waste. A critical passage for the beam quality and especially for the emittance is the injector, which for the MYRRHA project consists of a 4-Rod RFQ, two Quarter Wave Rebunchers (QWR) and a total of 16 normal conducting CH-DTL cavities. The first installment of the MYRRHA injector in Louvein-La-Neuve (Belgium) will include an ion source, a RFQ, the QWRs and the first seven CH DTL cavities. This paper will report on the status of the low level tests on CHs 1 and 2 as well as on further developments on CHs 8-15. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO090 | ||
About • | paper received ※ 12 September 2018 paper accepted ※ 20 September 2018 issue date ※ 18 January 2019 | ||
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MOPO104 | LLRF R&D Towards CW Operation of the European XFEL | FEL, cavity, controls, LLRF | 223 |
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The ever growing request for machines with a higher average beam pulse rate and also with a relaxed (< 1 MHz) pulse separation calls for superconducting linacs that operate in Long Pulse (LP) or Continuous Wave (CW) mode. For this purpose the European X-ray Free Electron Laser (European XFEL) could be upgraded to add the ability to run in CW/LP mode. Cryo Module Test Bench (CMTB) is a facility used to perform tests on superconducting cavity cryomodules. Because of the interest in upgrading European XFEL to a CW machine, CMTB is now used to perform studies on XM-3, a 1.3 GHz European XFEL-like cryomodule with modified coupling that is able to run with very high quality factor (QL = 10E7…10E8) values. The RF power source allows running the cavities at gradients larger than 16 MV/m. Because of the QL and gradient values involved in these tests, detuning effects like mechanical resonances and microphonics became more challenging to regulate. The goal is then to determine the appropriate set of parameters for the LLRF control system to keep the error to be less than 0.01° in phase and 0.01% in amplitude. | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO104 | ||
About • | paper received ※ 11 September 2018 paper accepted ※ 20 September 2018 issue date ※ 18 January 2019 | ||
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TUPO052 | Design Study of a Prototype 325MHz RF Power Coupler for Superconducting Cavity | simulation, pick-up, cavity, superconducting-cavity | 451 |
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Funding: Korea University (Sejong Campus) in South KOREA We present design studies of a prototype RF input power coupler, which provides RF powers to 325MHz cavities up to 18.5 kW in CW mode. The prototype power coupler is a coaxial capacitive type with single ceramic window. In order to optimize the RF coupler design, we performed multi-physics simulations, including electromagnetic, thermal, and mechanical analyses. |
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Poster TUPO052 [1.607 MB] | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO052 | ||
About • | paper received ※ 12 September 2018 paper accepted ※ 19 September 2018 issue date ※ 18 January 2019 | ||
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THPO020 | Dynamic Behavior of Electron Beam under Rf Field and Static Magnetic Field in Cyclotron Auto-resonance Accelerator | electron, SRF, GUI, acceleration | 725 |
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Funding: the National Natural Science Foundation of China The cyclotron auto-resonance accelerator (CARA) is a novel concept of accelerating continuous gyrating charged-particle beams to moderately or highly relativistic energies, which can be used as the high power microwave source and applied in environment improvement area, particularly in the flue gas pollution remediation. In CARA, the continuous-wave (CW) electron beam follows a gyrating trajectory while undergoing the interaction with the rotating TE-mode rf field and tapered static magnetic field. In the process of gyrating acceleration, the phase synchronization with the rf field is automatically maintained, so to speak, with auto-resonance. Simulation models are constructed to study the effect of rf field and static magnetic field on electron beam in CARA, where the beam energy, trajectory and velocity component are analysed. The simulation results match reasonably well with theoretical predication, which sets up a solid foundation for future designs of CARA. |
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Poster THPO020 [1.448 MB] | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO020 | ||
About • | paper received ※ 11 September 2018 paper accepted ※ 21 September 2018 issue date ※ 18 January 2019 | ||
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