Design and Preliminary Performance of the New Injection Shift Bump Power Supply at the J-PARC 3-GeV RCS

Takayanagi, Tetsuya; Hayashi, Naoki; Kinsho, Michikazu; Ueno, T.; Togashi, T.; Horino, K.; Irie, Y.

doi:10.1109/tasc.2013.2297029

Cited by 11 publications

(11 citation statements)

References 4 publications

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“…In the shift bump magnet, performance of the power supply is dominant as to a stability of bending magnet. New power supply developed by the RCS group achieved low current ripple noise less than 0.2 % [8]. Therefore the same high stability of the bending angle in the pulse-BM is expected by using this technology.…”

Section: Pulse Bending Magnetmentioning

confidence: 86%

Conceptual Design of Beam Dividing System for J-PARC Transmutation Experimental Facility

Yoshimoto

Okabe²,

Kinsho³

2015

Proceedings of the 2nd International Symposium on Science at J-Parc — Unlocking the Mysteries of Life, Matter and the Universe

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Section: Pulse Bending Magnetmentioning

confidence: 86%

Conceptual Design of Beam Dividing System for J-PARC Transmutation Experimental Facility

Yoshimoto

Okabe²,

Kinsho³

2015

Proceedings of the 2nd International Symposium on Science at J-Parc — Unlocking the Mysteries of Life, Matter and the Universe

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“…Thus, switching noise is suppressed well compared to old system. The maximum required current is 32 kV, and voltage is 14.4kV (±7.2kV), as defined based on the magnet inductance and the fast rise/fall time of 150 μs [24].…”

Section: Rcsmentioning

confidence: 99%

Path to 1-MW at J-PARC Rapid Cycling Synchrotron

Yamamoto¹,

Yamamoto²,

Morishita³

et al. 2017

ujpa

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The accelerator system at Japan Proton Accelerator Research Complex (J-PARC) has been operational since May 2008 and has mainly been used to perform physics experiments. The accelerator system consists of a Linac, a Rapid Cycling Synchrotron (RCS), and a Main Ring Synchrotron. The originally designed RCS injection energy is 400MeV, but the first operation started at 181MeV. New acceleration cavities were installed in J-PARC Linac during the summer shutdown of 2013, and user operation by the Material and Life science Facility (MLF) at the injection energy of 400MeV was started from February 2014. Post beam commissioning of 400MeV injection energy, beam loss was small enough, and we established 300kW continuous operation. Subsequently, the peak current of the Linac was increased from 30mA to 50mA. This upgrade enabled us to try 1-MW beam acceleration. Finally, after some additional improvements, we successfully accelerated 1-MW equivalent protons.

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“…High-Precision Pulsed Current Sources are used in highenergy physics, medical research and clinical treatment applications to generate strong magnetic fields over bending magnets in particle accelerators [1]- [5]. The main characteristics of these converters are that they must provide, over an inductive load LR, current pulses of tens of kA, with short rise and fall times, T R and T F respectively, and high precision in the order of hundreds of parts-per-millon (ppm) during the flat-top duration of a few ms, T F T .…”

Section: Introductionmentioning

confidence: 99%

“…The main characteristics of these converters are that they must provide, over an inductive load LR, current pulses of tens of kA, with short rise and fall times, T R and T F respectively, and high precision in the order of hundreds of parts-per-millon (ppm) during the flat-top duration of a few ms, T F T . [6]- [8].…”

Section: Introductionmentioning

confidence: 99%

“…Currently, these converters are based on switching mode topologies, such as asymmetric hybrid multilevel converters [9], or on topologies whose number of semiconductor devices has been optimized [6], [7], [10], [11]. These topologies are distinguished by their capability to generate different voltage levels, adjusted according to the parameters of the load so as to meet particular requirements at each pulse stage.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Event-Based Control System Suitable for High-Precision Pulsed Current Source Applications With Improved Switching Behavior

Penovi

Maestri

Retegui

et al. 2015

IEEE Trans. Ind. Inf.

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This work presents a control system suitable for high-precision pulsed current sources. The proposed control system is based on the detection of events so as to define changes in the power converter state in order to produce the required current waveform with a good dynamic response.Additionally, this control system is designed to regulate the flattop current with a well-defined precision. In order to mitigate the effect of the measurement noise, an estimation algorithm for the controlled current is incorporated. This algorithm generates a filtered version of the controlled variable without affecting the control dynamics. The use of the estimated current allows to improve the detection of the events and to avoid an increase in the number of commutations due to possible erratic comparisons. Then, the estimator gains are tuned by using genetic algorithm techniques to optimize the RMS value for a typical pulse.Furthermore, in order to independently perform the required set of tasks, the proposed control system is implemented by using a FPGA-based platform. Additionally, due to the demanding precision in these applications, different considerations regarding its implementation, such as the digital wordlength, binary point position, rounding method, and overflow behavior, have been taken into account. Experimental results obtained from the application of the proposed control system to a laboratory prototype are presented.

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Design and Preliminary Performance of the New Injection Shift Bump Power Supply at the J-PARC 3-GeV RCS

Cited by 11 publications

References 4 publications

Conceptual Design of Beam Dividing System for J-PARC Transmutation Experimental Facility

Conceptual Design of Beam Dividing System for J-PARC Transmutation Experimental Facility

Path to 1-MW at J-PARC Rapid Cycling Synchrotron

Event-Based Control System Suitable for High-Precision Pulsed Current Source Applications With Improved Switching Behavior

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