Four-rod-λ/2-RFQ for light ion acceleration

Schempp, A.; Deitinghoff, H.; Ferch, M.; Junior, P.; Klein, H.

doi:10.1016/0168-583x(85)90119-3

Cited by 45 publications

(5 citation statements)

References 6 publications

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“…2. The RFQ operates at the cyclotron RF frequency and must use a split-coaxial, 4-rod configuration to resonate at such a low frequency (Schempp et al 1985). (Typical RFQs operate at several hundred MHz.)…”

Section: Bunchingmentioning

confidence: 99%

What is the potential impact of the IsoDAR cyclotron on radioisotope production: a review

Waites

Alonso

Barlow

et al. 2020

EJNMMI radiopharm. chem.

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The IsoDAR collaboration is developing a high-current cyclotron for a neutrino search experiment. Designed to deliver 10 mA of 60 MeV protons, the current and power of this cyclotron far exceed those of existing accelerators, opening new possibilities for the production of radiopharmaceutical isotopes, producing very highactivity samples in very short times. The cyclotron can also be easily configured to deliver ions other than protons including 1 mA of alpha particles at 240 MeV: this flexibility gives a broad reach into new areas of isotope production. We explain how IsoDAR overcomes the beam limits of commercial cyclotrons, and how it could represent the next step in isotope production rates.

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Section: Bunchingmentioning

confidence: 99%

What is the potential impact of the IsoDAR cyclotron on radioisotope production: a review

Waites

Alonso

Barlow

et al. 2020

EJNMMI radiopharm. chem.

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“…2. This RFQ operates at the cyclotron RF frequency (∼35 MHz) and will use a split-coaxial, 4-rod configuration [15]. It must be installed close to the spiral inflector, to prevent loss of the high bunching factor.…”

Section: Bunchingmentioning

confidence: 99%

Medical isotope production with the IsoDAR cyclotron

et al. 2019

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“…An input coupler with adequate coupling is needed so as to transfer a higher CW power to the RFQ cavity effectively and maintain a match between the final RF amplifier and cavity If the total number of such rf-cell is n then L RFQ = L R / nand C RFQ = n. C R Using the basic four wire transmission line and parallel plate transmission line theory we can calculate the C rod and Lpos t [6]. These help for calculation of frequency 10, Q-value and shunt impedance R p • Using this description the preliminary rf structure was fixed and further optimization was done with the code MAFIA.…”

Section: Loop Type Input Couplermentioning

confidence: 99%

RF coupler and frequency tuning system design for RFQ cavity of VEC-RIB

Pandey

Naik

2007

2007 IEEE Applied Electromagnetics Conference (AEMC)

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An input coupler with adequate coupling is needed so as to transfer a higher CW power to the RFQ cavity effectively and maintain a match between the final RF amplifier and cavity R ...... -L R = 2. (Lp / 2) and Figure 2 .The lumped equivalent circuit of RFQ resonating structure If the total number of such rf-cell is n then L RFQ = L R / nand C RFQ = n. C R Using the basic four wire transmission line and parallel plate transmission line theory we can calculate the C rod and Lpos t [6]. These help for calculation of frequency 10, Q-value and shunt impedance R p • Using this description the preliminary rf structure was fixed and further optimization was done with the code MAFIA. The resonant frequency, Q value and shunt impedance R p of the 1.7 m long structure with unmodulated electrodes of the same characteristic radius have been calculated to be 35.16 MHz, 9830 and 174 kQ respectively. The resonant structure is formed by the four vanes supported on posts on a base plate. Each diagonally opposite pair of vanes is supported by two posts. The basic rf cell of the above 'four-rod' structure can be described as two coupled A14 transmission lines excited in transverse 1t-mode forming a parallel LC resonant circuit with the vanes as capacitance and the posts as inductance. In this configuration the posts can be seen as a parallel plate transmission line shorted at on end and other end is open (with height I :s A/4) acting as inductor and these are loaded with vans that can be seen as capacitance (open ended transmission line). The lumped equivalent circuit of one resonating rf-cell is shown in Figure 2. The total capacitance of resonating structure of one rf-cell is C R and inductance is L R • Where

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Four-rod-λ/2-RFQ for light ion acceleration

Cited by 45 publications

References 6 publications

What is the potential impact of the IsoDAR cyclotron on radioisotope production: a review

What is the potential impact of the IsoDAR cyclotron on radioisotope production: a review

Medical isotope production with the IsoDAR cyclotron

RF coupler and frequency tuning system design for RFQ cavity of VEC-RIB

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