Studies of ferrite materials for the AGS Booster Synchrotron

Goldman, M.A.; Cameron, P.; Sanders, R.; Tuozzolo, J.

doi:10.1109/pac.1989.73053

Cited by 6 publications

(2 citation statements)

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“…During the initial stages of this coalescing upgrade, a literature search revealed that newer types of NiZn ferrites were commercially available with significantly lower high field losses [4]. A decision was made to test several of these new ferrites to determine their properties and high field losses at 2.5 and 5 MHz.…”

Section: Ferrite Selection and Testingmentioning

confidence: 99%

A new RF system for bunch coalescing in the Fermilab Main Ring

Dey

Kourbanis

Wildman

Proceedings Particle Accelerator Conference

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A new RF system for improving both the proton and antiproton bunch coalescing efficiencies has been installed in the Fermilab Main Ring. The system consists of five, ferrite-loaded RF cavities operating at a fixed frequency of 2.5 MHz and a second harmonic cavity at 5.0 MHz. Each cavity is driven by a 5 kW solid-state power amplifier and can produce a peak accelerating gap voltage greater than 15kV.An overview of the entire system will be presented along with a detailed description of the RF cavity design including ferrite selection and testing procedures.

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Section: Ferrite Selection and Testingmentioning

confidence: 99%

A new RF system for bunch coalescing in the Fermilab Main Ring

Dey

Kourbanis

Wildman

Proceedings Particle Accelerator Conference

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“…This also saves some ring space. Assuming type 4M2 ferrite [2,3,4] with 60 cm OD and 30 cm ID rings we would fill the two lowest frequency cavities with 1.26 meters of ferrite, the amount needed to keep the B field below 200 gauss at 1.5 MHz. The remaining higher harmonic cavities would be filled with 0.87 meters of femte.…”

Section: Hi Rf Cavitymentioning

confidence: 99%

A low-frequency high-voltage RF-barrier bunching system for high-intensity neutron source compressor rings

Hardek

Rees

Ziomek

Proceedings Particle Accelerator Conference

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This bunching concept allows uniform longitudinal beam distributions with low momentum spread. Bunching cavities are operated at the revolution frequency (1.5 MHz in our case) and each of the Znd, 3rd, 4th, and 5th revolution frequency harmonics. Their effects combine to maintain a beam free gap in the longitudinal distribution of the accumulated beam. The cavities are driven by low-plateresistance common-cathode configured tetrode amplifiers incorporating local rf feedback. Additional adaptive feedforward hardware is included to reduce the beam-induced bunching-gap voltages well below &E achievable solely with rf feedback. Details of this system are presented along with a discussion of the various feed-back and feed-forward techniques incorporated.

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The AGS Booster high frequency RF system

Sanders

Cameron

Eng

et al.

Conference Record of the 1991 IEEE Particle Accelerator Conference

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configuration and parameters. Table I is a tabulation of requirements for protons, and also two extremes from a light ion to a heavy ion, sulphur to gold respectively. Table I A high level RF system, including a power amplifier and cavity, has been designed and built for the AGS Booster. It covers a frequency range of 2.4 to 4.2 MHz and will be used to accelerate high intensity protons, low intensity polarized protons and heavy ions, to the 15 GeV level. A total accelerating voltage of up to 90 kV will be provided by two cavities, each having two gaps. The internally crosscoupled, pushpull cavities are driven by an adjacently located power amplifier. In order to accommodate beam intensities up to 0.75 x lO 1^ protons per bunch, a low plate resistance power tetrode is used. The tube anode is magnetically coupled to one of the cavity's two parallel cells. The amplifier is a grounded cathode configuration' driven by a remotely located solid-state amplifier. It has been tested in the laboratory at full gap voltage with satisfactory results.

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Studies of ferrite materials for the AGS Booster Synchrotron

Abstract: Its accelerating cavities are sveep-tuned by varying the permeabilitv of ferrite core rings vithin the cavities. Core material selection criteria and evaluation are discussed Measure-Tents of permeability, loss and perrni tt i" : ty .v.c presented.

Cited by 6 publications

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A new RF system for bunch coalescing in the Fermilab Main Ring

A new RF system for bunch coalescing in the Fermilab Main Ring

A low-frequency high-voltage RF-barrier bunching system for high-intensity neutron source compressor rings

The AGS Booster high frequency RF system

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