Advanced Technologies for Applied Particle Accelerators and Examples of Their Use (Review)

Kutsaev, Sergey

doi:10.1134/s1063784221020158

Cited by 36 publications

(10 citation statements)

References 246 publications

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“…Although, the split feature results in higher surface fields compared to conventional structures at the same breakdown rate, it provides a great potential for cost reduction of their fabrication [8,9,43,44]. Also, this is the first time a high gradient split structure has been built using the EBW process, compared to conventional approach that has decades of experience, and suffered from surface contamination.…”

Section: Discussionmentioning

confidence: 99%

“…Reaching multi-TeV energies in future linear collider applications like CLIC [1] or development beam driven THz sources [2] with radio frequency (RF) accelerators of reasonable length and cost will require achieving very high accelerating gradients of >100 MV m −1 . The main limit to achieving and validated a high-gradient NC hard copper-silver alloy RF accelerating structure that not only utilizes electron-beam welding (EBW) but also incorporates a novel open split design to significantly reduce the assembly complexity and cost [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Experimental studies of a high-gradient X-band welded hard-copper split accelerating structure

Agustsson¹,

Carriere²,

Chimalpopoca³

et al. 2022

J. Phys. D: Appl. Phys.

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Recent research on high-gradient radio frequency (RF) accelerating structures indicates that the use of hard copper alloys provides improvement in high gradient performance over annealed copper. Such structures are made by bonding individually manufactured parts. However, there are no well-established bonding techniques that preserve the hardness, surface finish and cleanliness required for high gradient operation. To preserve the copper hardness, RadiaBeam has developed a joining technique based on electron beam welding. This technique provides efficient bonding with strong, clean welds and minimal thermal loading, while maintaining a clean inner RF environment. Our RF design and fabrication methodology limits the small heat affected zone to the outer cavity envelop, with virtually no distortions or thermal loading of critical RF surfaces. It also incorporates provisions to precisely control the gap despite conventional issues with weld joint shrinkage. To date we have manufactured and validated an RF accelerating structure joined by electron-beam welding that incorporates a novel open split design to significantly reduce the assembly complexity and cost. In this paper, we will present the electromagnetic design of this structure, discuss bonding, and present the results of high-power tests, where the accelerating gradients of 140 MV/m with surface peak fields of 400 MV/m were achieved for flat-top pulse length of 600 ns with an RF breakdown rate of 10-4 1/(pulse∙m).

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental studies of a high-gradient X-band welded hard-copper split accelerating structure

Agustsson¹,

Carriere²,

Chimalpopoca³

et al. 2022

J. Phys. D: Appl. Phys.

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“…The improvement of the existing electron sources is directly linked to strong demands on higher electron currents, higher repetition rates or high brightness beams. 6,7…”

Section: Introductionmentioning

confidence: 99%

“…The improvement of the existing electron sources is directly linked to strong demands on higher electron currents, higher repetition rates or high brightness beams. 6,7 In the last decades, the development in accelerator technology contributed to advanced cancer diagnostic and therapy, 8 and helped to understand chemical reaction mechanisms 9 and molecular excitation and vibration states. 10 Free electron laser (FEL), especially X-ray free electron laser (XFEL) facilities 11,12 and terahertz (THz) radiation sources 13 are powerful tools with a wide application in biomedicine, security imaging and condensed matter physics.…”

Section: Introductionmentioning

confidence: 99%

Review of photocathodes for electron beam sources in particle accelerators

2023

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“…Novel high gradient accelerating structures operating in the THz frequency range are a key aspect for infrared free-electron lasers (FEL) and TeV scale linear colliders. These facilities will open new horizons in high-energy physics, and chemical and biological imaging [1]. To reach high energy with reasonable length requires high accelerating gradients of ~100 MV/m [2].…”

Section: Introductionmentioning

confidence: 99%

Pulse Length Monitor for Breakdown Diagnostics in THz and Mm-Wave Accelerators

et al. 2021

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The development of novel high-gradient accelerating structures operating at THz frequencies is critical for future free-electron lasers and TeV scale linear colliders. To reach high energies with reasonable length requires high accelerating gradients of ~100 MV/m. The main limitation to reaching these high-energy gradients is the vacuum RF breakdown phenomenon, which disrupts normal accelerator operations. For stable operations and to understand the breakdown microscopic dynamics, a new device capable of detecting the breakdown occurrences is required. In this paper, we provide the design of a pulse length monitor based on an analog to digital converter for fast signal digitization without the need to use high-speed digitizers to be used in a commercial mm-wave heterodyne spectrometer.

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Advanced Technologies for Applied Particle Accelerators and Examples of Their Use (Review)

Cited by 36 publications

References 246 publications

Experimental studies of a high-gradient X-band welded hard-copper split accelerating structure

Experimental studies of a high-gradient X-band welded hard-copper split accelerating structure

Review of photocathodes for electron beam sources in particle accelerators

Pulse Length Monitor for Breakdown Diagnostics in THz and Mm-Wave Accelerators

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