High power RF conditioning of the LEDA RFQ

Young, L.M.; Rees, D.; Rybarcyk, L.; Cummings, K.

doi:10.1109/pac.1999.795387

Cited by 10 publications

(5 citation statements)

References 2 publications

(2 reference statements)

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“…However, as large-scale scientific devices increasingly shift towards CW operation and higher current requirements, some RFQs' power consumption even reaches the level of megawatts [12][13][14], which restricts the stability and economy of RFQs' long-term operation. Fortunately, superconductivity offers a solution by significantly reducing power losses and enabling CW operation; the combination of these two technologies presents a pathway for the more efficient acceleration of high-current beams [15].…”

Section: Sc Rfqmentioning

confidence: 99%

Design of a 162.5 MHz Superconducting Radio-Frequency Quadrupole for High-Intensity Proton Acceleration

Xia,

Wang,

et al. 2023

Applied Sciences

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Superconducting (SC) radio-frequency quadrupoles (RFQs) have exhibited outstanding performance in transmitting and accelerating high-current continuous-wave (CW) ion beams. They can complete beam acceleration at a much higher gradient and with much lower power consumption compared with normal conducting (NC) RFQs. In this study, we introduce a novel SC RFQ scheme operating at 162.5 MHz to accelerate 10 mA proton beams from 30 keV to 2.5 MeV. It will be used as a crucial component for a neutron source dedicated to Boron Neutron Capture Therapy (BNCT) and neutron imaging projects. For efficient transmission of proton beams, we selected a relatively high inter-vane voltage of 240 kV, and the beam dynamics design yielded satisfactory results. Subsequently, RF design and multi-physics analysis were carried out to validate the reliability of the design. A 30-centimeter-long cavity was specifically designed for the vertical test and allowed for a thorough evaluation of the performance of the SC RFQ after post-treatments. Additionally, the tuning design of the 30 cm cavity was also carried out.

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Section: Sc Rfqmentioning

confidence: 99%

Design of a 162.5 MHz Superconducting Radio-Frequency Quadrupole for High-Intensity Proton Acceleration

Xia,

Wang,

et al. 2023

Applied Sciences

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“…Very high beam neutralization was reported in LEBT beam lines transporting intense beams. For example, the LEDA beam following the RFQ achieved 96% neutralization for 100 mA pulsed beam [7].…”

Section: Space Charge Neutralization In the Saraf Lebtmentioning

confidence: 99%

Effect of strong solenoidal focusing on beam emittance of low-energy intense proton beam in the SARAF LEBT

Shor¹,

Weissman²

2016

J. Inst.

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Influence of strong solenoidal beam focusing on beam emittance was studied at the SARAF LEBT beam line using 5 mA 20 keV proton quasi-DC beams. The measurements show that within the experimental uncertainties, emittance does not change over the whole focusing range. Detailed beam dynamics simulations were performed to achieve better understanding of the experimental results. The experimental and simulation results are fully consistent with the assumption of nearly full space charge neutralization for the quasi-DC proton beam. K: Beam Optics; Accelerator modelling and simulations (multi-particle dynamics; singleparticle dynamics); Beam dynamics 1Corresponding author.

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“…The electrons trapped in the beam due to space charge compensation must be removed before entering the RFQ. This is done with the help of an electron trap [25,26]. The electron trap is a ring with a negative 1-2 kV potential placed at the entrance of the RFQ through which the beam passes.…”

Section: Beam Dynamics With Space Charge Compensationmentioning

confidence: 99%

Optimization of solenoid based low energy beam transport line for high current H⁺beams

et al. 2015

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A 20 MeV, 30 mA CW proton linac is being developed at BARC, Mumbai. This linac will consist of an ECR ion source followed by a Radio Frequency Quadrupole (RFQ) and Drift tube Linac (DTL). The low energy beam transport (LEBT) line is used to match the beam from the ion source to the RFQ with minimum beam loss and increase in emittance. The LEBT is also used to eliminate the unwanted ions like H + 2 and H + 3 from entering the RFQ. In addition, space charge compensation is required for transportation of such high beam currents. All this requires careful design and optimization. Detailed beam dynamics simulations have been done to optimize the design of the LEBT using the Particle-in-cell code TRACEWIN. We find that with careful optimization it is possible to transport a 30 mA CW proton beam through the LEBT with 100% transmission and minimal emittance blow up, while at the same time suppressing unwanted species H + 2 and H + 3 to less than 3.3% of the total beam current.

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High power RF conditioning of the LEDA RFQ

Cited by 10 publications

References 2 publications

Design of a 162.5 MHz Superconducting Radio-Frequency Quadrupole for High-Intensity Proton Acceleration

Design of a 162.5 MHz Superconducting Radio-Frequency Quadrupole for High-Intensity Proton Acceleration

Effect of strong solenoidal focusing on beam emittance of low-energy intense proton beam in the SARAF LEBT

Optimization of solenoid based low energy beam transport line for high current H⁺beams

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High power RF conditioning of the LEDA RFQ

Cited by 10 publications

References 2 publications

Design of a 162.5 MHz Superconducting Radio-Frequency Quadrupole for High-Intensity Proton Acceleration

Design of a 162.5 MHz Superconducting Radio-Frequency Quadrupole for High-Intensity Proton Acceleration

Effect of strong solenoidal focusing on beam emittance of low-energy intense proton beam in the SARAF LEBT

Optimization of solenoid based low energy beam transport line for high current H+beams

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Optimization of solenoid based low energy beam transport line for high current H⁺beams