Superconducting linacs used with tandems

Ben‐Zvi, I.

doi:10.1016/0167-5087(84)90432-0

Cited by 7 publications

(2 citation statements)

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“…While the HHG direct-seeding technique has been successfully demonstrated in the VUV wavelengths [6], it can hardly generate x-ray radiation due to the limitation of the HHG power at this wavelength range. An alternative way for seeding FEL at shorter wavelength is adopting high harmonic generation schemes such as high-gain harmonic generation (HGHG) [7,8] or echo-enable harmonic generation [9][10][11]. Unfortunately, the limitation of the energy modulation amplitude prevents the possibility of reaching very short wavelength in a single stage setup.…”

Section: Introductionmentioning

confidence: 99%

Extending the photon energy coverage of an x-ray self-seeding FEL via the reverse taper enhanced harmonic generation technique

Zhang

Zheng

Feng

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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In this paper, a simple method is proposed to extend the photon energy range of a soft x-ray self-seeding free-electron laser (FEL). A normal monochromator is first applied to purify the FEL spectrum and provide a coherent seeding signal. This coherent signal then interacts with the electron beam in the following reverse tapered undulator section to generate strong coherent microbunchings while maintain the good quality of the electron beam. After that, the pre-bunched electron beam is sent into the third undulator section which resonates at a target high harmonic of the seed to amplify the coherent radiation at shorter wavelength. Three dimensional simulations have been performed and the results demonstrate that the photon energy gap between 1.5 keV and 4.5 keV of the self-seeding scheme can be fully covered and 100 GW-level peak power can be achieved by using the proposed technique.

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Section: Introductionmentioning

confidence: 99%

Extending the photon energy coverage of an x-ray self-seeding FEL via the reverse taper enhanced harmonic generation technique

Zhang

Zheng

Feng

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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“…During the last years several heavy-ion postaccelerators have been built or are under construction which are based on superconducting resonators [1,2].…”

Section: Introductionmentioning

confidence: 99%

Design and Test of a Superconducting Quarter-Wave-Resonator

Steck

Grieser

Jaeschke

et al. 1985

IEEE Trans. Nucl. Sci.

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A superconducting quarter-wave-resonator at 325 MHz has been designed that could be used as a debuncher for the Heidelberg postaccelerator. The design study utilized the computer codes SUPERFISH and URMEL as well as a theory considering the quarter-waveresonator as a piece of transmission line shorted at one end. These calculations were used to optimize H /eacc. E/Sacc and U/ac According to measurements with a model resonator the copper body of a first prototype resonator has been machined. In first experiments with an electrochemically plated lead surface an 7 unloaded quality Q = 6 x 10 has been measured. The highest accelerating field obtained in that test amoun-7 ted to eacc = 1.8 MV/m at QO = 1.0 x 10

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