Electromagnetic Modeling of the AGS A10 Injection Kicker Magnet

Armenta, Roberto B.; Barnes, Michael; Blackmore, E. W.; Hadary, O.; Norn, D.T.; Wait, G.D.

doi:10.1109/tasc.2005.864458

Cited by 4 publications

(6 citation statements)

References 2 publications

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“…The magnetic and electric fields associated with the aperture of the prototype A10 kicker magnet have been studied using 2D and 3D electromagnetic codes: the magnetic field simulations included the effect of eddy currents [5]. The shape of the aperture was optimized to achieve a design goal of ±3% deflection uniformity, for protons, throughout 90% of the aperture cross-sectional area.…”

Section: Simulationsmentioning

confidence: 99%

“…The shape of the aperture was optimized to achieve a design goal of ±3% deflection uniformity, for protons, throughout 90% of the aperture cross-sectional area. The predicted inductance of a central cell of the optimized geometry is 62.4 nH [5]. To achieve 12.5 Ω characteristic impedance, the required capacitance is therefore 399.2 pF per cell.…”

Section: Simulationsmentioning

confidence: 99%

“…Fringe fields result in an appreciable increase in inductance per cell towards the ends of a kicker [3,5]. Hence in order to obtain realistic inductance predictions the 3D eddy current code Elektra has been used to simulate the kicker magnet [5].…”

Section: Simulationsmentioning

confidence: 99%

“…Hence in order to obtain realistic inductance predictions the 3D eddy current code Elektra has been used to simulate the kicker magnet [5]. Elektra has successfully been applied, previously, to accurately predict the cell inductance of a transmission line type kicker magnet [3].…”

Section: Simulationsmentioning

confidence: 99%

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Low power measurements on an AGS injection kicker magnet

Barnes

Wait

2007

2007 IEEE Particle Accelerator Conference (PAC)

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The present AGS injection kickers at A5 location were designed for 1.5 GeV proton injection. Recent high intensity runs have pushed the transfer kinetic energy to 1.94 GeV, but with an imperfect matching in transverse phase space. Space charge forces result in both fast and slow beam size growth and beam loss as the size exceeds the AGS aperture. An increase in the AGS injection energy to 2 GeV with adequate kick strength would greatly reduce the beam losses, making it possible to increase the intensity from 70 TP (70·10^12 protons/s) to 100 TP. R&D studies have been undertaken by TRIUMF, in collaboration with BNL, to design two new kicker magnets for the AGS A10 location to provide an additional kick of 1.5 mrad to 2 GeV protons. TRIUMF has designed a 12.5 Ω transmission line kicker magnet with rise and fall times of 100 ns, 3% to 97%, and field uniformity of ±1% over 85% of the aperture, powered by matched 12.5 Ω pulse-forming lines. This paper describes the results of detailed capacitance and inductance measurements, on the prototype magnet, and compares these with predictions from electromagnetic simulations.

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Section: Simulationsmentioning

confidence: 99%

Section: Simulationsmentioning

confidence: 99%

Section: Simulationsmentioning

confidence: 99%

Section: Simulationsmentioning

confidence: 99%

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Low power measurements on an AGS injection kicker magnet

Barnes

Wait

2007

2007 IEEE Particle Accelerator Conference (PAC)

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“…The grading of the capacitors compensates for conduction losses and ensures the flatness of long pulses [25]. Adjustment of the magnet impedance is obtained by accurate calculation [14,26] or by variable spacing between conductors as foreseen in some of the FNAL kicker magnets [12,24].…”

Section: Minimising the Ripplementioning

confidence: 99%

Advances of Transmission Line Kicker Magnets

Ducimetière

Proceedings of the 2005 Particle Accelerator Conference

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Fast pulsed magnets or kickers are widely used in circular accelerators for injection, fast extraction and beam excitation. As from the early 60's transmission line type kicker magnets have been employed to produce rectangular field pulses with good rise time. Over some 40 years this technology has evolved with the rising requirements. While the necessary kick strength has increased with the particle beam energy the strive for efficiency has pushed developments towards lower impedance systems and/or short circuited magnets. The flat top ripple is constrained by the maximally tolerable beam oscillation. The beam intensity can impose a screening of the magnet yoke. The most advanced features implemented in recent transmission line kicker magnets are reviewed and illustrated with examples from different laboratories.

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