Superconducting RF guns for FELs

Janssen, D.; Büttig, H.; Evtushenko, P.; Lehnert, U.; Michel, P.; Möller, K.; Schneider, C.; Stephan, J.; Teichert, J.; Kruchkov, S.; Myskin, O. K.; Tribendis, Alexey; Volkov, Vladimir; Sandner, W.; Will, I.; Quast, T.; Goldammer, K.; Marhauser, Frank; Ylä‐Oijala, Pasi

doi:10.1016/j.nima.2004.04.076

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…This value is within the numerical noise of the applied tracking calculation. The slightly larger emittance for the 1 1 2 cell cavities can be explained by a larger distance of the magnetic field maximum to the cathode in these cases.…”

Section: Compensation Of Emittance Growth In a Superconducting Rmentioning

confidence: 89%

“…Besides the TM modes, there is a TE mode, a second class of rf fields, where the magnetic component is applied only along the symmetry axis of the cavity. In superconducting cavities, the maximum axial field, achievable with reasonable surface field strength, is of the order of 0.3-0.4 T. In past years, the application of TE modes has been discussed in connection with superconducting rf guns [1], where the magnetic rf field can replace the static field of a solenoid, used in warm rf guns.…”

Section: Introductionmentioning

confidence: 99%

“…3. (Color) Shape, field pattern, the axis, and surface fields of 11 2 cell superconducting cavity of the rf gun with the separated focusing TE 011 mode having the frequency of 1613 MHz. (Color) Shape, field pattern, the axis, and surface fields of 3 1 2 cell superconducting cavity of the rf gun having TE 021 mode with the frequency of 3781 MHz.…”

mentioning

confidence: 99%

“…(Color) Shape, field pattern, the axis, and surface fields of 11 2 cell superconducting cavity of the rf gun with the separated focusing cavity having TE 011 mode frequency of 2487 MHz.…”

mentioning

confidence: 99%

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Applications of cavity transverse modes in accelerators

Volkov

Janssen

2008

Phys. Rev. ST Accel. Beams

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Different applications of TE modes in accelerator physics are discussed. In this discussion, the Fourier transform of the squared axial component of magnetic field, B z 2 z, plays an important role. If it turns out to be zero, the rf field-particle energy transfer is negligible and the focal length of the TE mode lens is phase independent. Such rf lens focuses continuous beams just as a solenoid. In order to compensate spherical aberrations and emittance growth caused by field nonlinearities of a focusing solenoid, the rf focusing is used also even if the beam space charge is taken into account. If the transform has its maximum, excitations of TE mode resonances and electron beam self-focusing are possible. Furthermore, the rf field of the TE mode can be used to expand the radial acceptance of a FEL for the THz region.

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Section: Compensation Of Emittance Growth In a Superconducting Rmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

“…(Color) Shape, field pattern, the axis, and surface fields of 11 2 cell superconducting cavity of the rf gun with the separated focusing cavity having TE 011 mode frequency of 2487 MHz.…”

mentioning

confidence: 99%

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Applications of cavity transverse modes in accelerators

Volkov

Janssen

2008

Phys. Rev. ST Accel. Beams

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“…The large heat losses in the accelerator cavity wall of the FEL driver limit the FEL output power when based on a conventional normal conducting accelerator, and therefore a superconducting RF linac accelerator is the most efficient accelerating device to convert the RF generator power into charged particle energy, because the energy dissipation in the cavity is so small as to be negligible [22]. The energy-recovery linac (ERL), which is able to generate a high-brightness electron beam with a high average current, has been developed as a driver for a high-power free-electron laser [23].…”

Section: Acceleratormentioning

confidence: 99%

Terahertz radiation sources based on free electron lasers and their applications

Tan

Huang

Liu

et al. 2011

Sci. China Inf. Sci.

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The tunability, high power and flexible picoseconds-pulse time structure of terahertz (THz) radiation make the THz free-electron laser (FEL) a very attractive THz source of coherent radiation. This paper focuses on the development and perspectives of THz radiation sources based on the FEL. The principles of the low gain THz FEL oscillator, the SASE THz FEL amplifier and the supperradiant THz FEL are reviewed briefly, and the key technologies of THz FEL, such as injector, accelerator, undulator and optical cavity, are discussed, respectively. The current status of and future prospects for THz radiation sources based on the FEL are emphasized in this paper. Recent research and development have shown bright future in free-electron laser (FEL) THz radiation sources. The potential applications can be carried out in the field of imaging, material research, biology medicine, communication, diagnostics and many others.

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High Brightness Photo Injectors for Brilliant Light Sources

Stephan¹,

Krasilnikov²

2020

Synchrotron Light Sources and Free-Electron Lasers

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Superconducting RF guns for FELs

Cited by 8 publications

References 6 publications

Applications of cavity transverse modes in accelerators

Applications of cavity transverse modes in accelerators

Terahertz radiation sources based on free electron lasers and their applications

High Brightness Photo Injectors for Brilliant Light Sources

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