Bi-resonant klynac

Carlsten, Bruce E.; Nichols, Kimberley

doi:10.1016/j.nima.2017.09.022

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…Much of the research in high-brightness injectors over the last decades has focused on: (1) reducing the thermal emittance of the cathode [13,14] and (2) identifying sources of emittance growth and developing methods to eliminate them. These methods include emittance compensation using a solenoid near the gun [15], rf-symmetrized gun design [16,17], and bunch profile optimization [18,19].…”

mentioning

confidence: 99%

Experimental demonstration of the correction of coupled-transverse-dynamics aberration in an rf photoinjector

Zheng

Shao

et al. 2019

Phys. Rev. Accel. Beams

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The production of electron bunches with low transverse emittance approaches the thermal emittance of the photocathode as various aberrations are corrected. Recently, the coupled transverse dynamics aberration was theoretically identified as a significant source of emittance growth and a corrector magnet was proposed for its elimination [D.H. Dowell, F. Zhou, and J. Schmerge, PRAB 21, 010101 (2018)]. This aberration arises when the beam acquires an asymmetric distribution that is then rotated with respect to the transverse reference axis thus introducing a correlation in the vertical and horizontal planes. The asymmetry is introduced by a weak quadrupole field in the rf gun or emittance compensation solenoid and the rotation is caused by the solenoid. This Letter presents an experimental study of the coupled transverse dynamics aberration in an rf photoinjector and demonstrates its elimination by a quadrupole corrector consisting of a normal and a skew quadrupole. The experimental results agree well with theoretical predictions and numerical simulations. The study also demonstrates the emittance of a low charge beam can be preserved during transportation at its thermal value, which was 1.05 mm mrad/mm, for the cesium telluride photocathode and 248 nm UV laser used.

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mentioning

confidence: 99%

Experimental demonstration of the correction of coupled-transverse-dynamics aberration in an rf photoinjector

Zheng

Shao

et al. 2019

Phys. Rev. Accel. Beams

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“…through the external transmission line (10). This line includes a high-Q cavity resonator (17) to provide frequency control for a broad-band Klynac device. The rest of the output signal is transferred to the linac section through the external transmission line (3).…”

Section: Klynac Predecessors or The Patent Businessmentioning

confidence: 99%

“…Type-2 configuration has been designed and built, whereas the type-1 has been only studied numerically. In addition, Bruce Carlsten and Kimberley Nichols recently came up with an alternative bi-resonant configuration where the buncher cavity of a klystron section is uncoupled from all remaining cavities, which are all coupled to each other [17]. We will discuss the simulation results for type-1 and type-2 configurations in the next chapter, but first we will finish this chapter with a last theoretical section discussing the theory of coupled oscillators, analyzing if our device is sensitive to other modes rather than the main π/2 mode for which we designed it.…”

Section: Power Balancementioning

confidence: 99%

KLYNAC: Compact linear accelerator with integrated power supply

Malyzhenkov

2017

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Accelerators and accelerator-based light sources have a wide range of applications in science, engineering technology and medicine. Today the scientific community is working towards improving the quality of the accelerated beam and its parameters while trying to develop technology for reducing accelerator size. This work describes a design of a compact linear accelerator (linac) prototype, resonant Klynac device, which is a combined linear accelerator and its power supply -klystron. The intended purpose of a Klynac device is to provide a compact and inexpensive alternative to a conventional 1 to 6 MeV accelerator, which typically requires a separate RF source, an accelerator itself and all the associated hardware. Because the Klynac is a single structure, it has the potential to be much less sensitive to temperature variations than a system with separate klystron and linac. We start by introducing a simplified theoretical model for a Klynac device. We then demonstrate how a prototype is designed step-by-step using particle-in-cell simulation studies for monoresonant and bi-resonant structures. Finally, we discuss design options from a stability point of view and required input power as well as behavior of competing modes for the actual built device.

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Design and testing of a high perveance sheet beam electron gun

Smirnov

Agustsson

Chao

et al. 2023

Review of Scientific Instruments

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This paper presents the design, prototype engineering, and initial testing of a relatively low-voltage, high aspect ratio electron gun for versatile pulsed power applications. The sheet beam, diode electron gun is designed for (23–25) kV voltage and 6 µA/V1.5, as is required for x-band klystron, as a part of a compact Klylac delivering electron beam energy in the MeV range. The gun prototype was engineered, built, and tested using a Scandinova M1-0.5 modulator. Beam loss on the anode aperture is evaluated from transient waveforms and equivalent circuit modeling.

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Bi-resonant klynac

Cited by 3 publications

References 10 publications

Experimental demonstration of the correction of coupled-transverse-dynamics aberration in an rf photoinjector

Experimental demonstration of the correction of coupled-transverse-dynamics aberration in an rf photoinjector

KLYNAC: Compact linear accelerator with integrated power supply

Design and testing of a high perveance sheet beam electron gun

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