Improvement of the Shift Bump Magnetic Field for a Closed Bump Orbit of the 3-GeV RCS in J-PARC

Takayanagi, Tetsuya; Kanazawa, K.; Ueno, T.; Someya, Hirohiko; Harada, Hiroyuki; Irie, Y.; Kinsho, Michikazu; Yamazaki, Yoichi; Yoshimoto, Masahiro; Kamiya, J.; Watanabe, Minoru; Kuramochi, M.; Satou, Kenichirou

doi:10.1109/tasc.2008.920768

Cited by 10 publications

(4 citation statements)

References 2 publications

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“…The magnetic field distribution of each shift bump-magnet was measured and no difference was confirmed [3]. Three-dimensional magnetic field analysis has been used to design the power supply with complex structure magnet.…”

Section: A Magnetmentioning

confidence: 98%

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Simulation Model for Design of a New Power Supply

Takayanagi

Hayashi

Ueno

et al. 2012

IEEE Trans. Appl. Supercond.

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The simulation model for a new power supply of the injection bump system magnets [1]-[4] of the 3-GeV RCS (Rapid Cycling Synchrotron) in J-PARC (Japan Proton Accelerator Complex) [5], [6] has been constructed. The new power supply requires the reduction of the ripple noise current which will resonate with load and excites a forced beam oscillation at 96 kHz in the injection stage. In order to incorporate the load impedance in the simulation model, the impedances of a feeder line and the bump magnet with a ceramic vacuum chamber [7] inside were measured. The RF shield is formed on the ceramic surface along the beam direction. The results were successfully analysed using the OPERA-3D [8] and the circuit simulation code, Micro-Cap [9], and showed a good agreement. It was found the RF shield of a ceramic chamber has a resonant structure corresponding to 96 kHz.

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Section: A Magnetmentioning

confidence: 98%

“…The inductance obtained from the exciting waveform by the SB power supply became 14.4 (3). The parameter of the exciting waveform, an output voltage is 1580 V, a falling time from the flat-top to zero is 124 and an exciting current value is 13.6 kA.…”

Section: A Magnetmentioning

confidence: 99%

Simulation Model for Design of a New Power Supply

Takayanagi

Hayashi

Ueno

et al. 2012

IEEE Trans. Appl. Supercond.

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“…Since SB1-4 are connected in series and cannot be adjusted independently, they can be an additional source of the closed orbit distortion during the injection period. Therefore their gap adjustments were carefully performed in advance based on their field measurements coupled with the quadrupole magnet in order to fulfill a ''closed'' injection-orbit bump [24]. As mentioned in the next section, the closed orbit distortion caused by SB1-4 was confirmed to be negligible in the beam storage mode.…”

Section: Rcs Operation Modesmentioning

confidence: 99%

Beam commissioning of the 3-GeV rapid cycling synchrotron of the Japan Proton Accelerator Research Complex

Hotchi¹,

Kinsho²,

Hasegawa³

et al. 2009

Phys. Rev. ST Accel. Beams

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“…Therefore, a few correction magnets are required for the accelerator power supply (APS) machine to correct the beam [1][2][3]. For the Taiwan Photon Source (TPS) project, the quadrupole magnets of the storage ring have the most significant effect on the stability of the positron closed orbit as a result of the low frequency vibration [4,5]. Correction magnets are distributed around the injector synchrotron ring.…”

Section: Introductionmentioning

confidence: 99%

Compensator design for corrector magnet power supply of TPS facility

et al. 2017

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From 2012 to 2015, Taiwan government has a most important technology project is Taiwan Photon Source (TPS), the total budget of TPS fund to over US300 million. It set up a synchrotron storage ring (electron energy of 3.3 GeV, circumference of 518 m, and low emittance) that provides one of the world's brightest synchrotron sources of x-rays. This study presents a compensator design for corrector magnet power supply to avoid limitations in stabilizing the frequency when the machine output current load is valid. A lead-lag compensator had been built in a full-bridge converter to improve the system bandwidth. Lead-lag compensators influence various disciplines, such as robotics, satellite control, automobile diagnostics, and laser frequency stabilization. These components are important building blocks in analog control systems and can also be used in digital control. A 50V output voltage and 10A output current prototype converter is fabricated in the laboratory. From the experimental results, the effectiveness of the control loop design can be verified from the gain margin and phase margin. K: Analogue electronic circuits; Analysis and statistical methods; Acceleration cavities and magnets superconducting (high-temperature superconductor; radiation hardened magnets; normal-conducting; permanent magnet devices; wigglers and undulators) 1Corresponding author.

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Improvement of the Shift Bump Magnetic Field for a Closed Bump Orbit of the 3-GeV RCS in J-PARC

Cited by 10 publications

References 2 publications

Simulation Model for Design of a New Power Supply

Simulation Model for Design of a New Power Supply

Beam commissioning of the 3-GeV rapid cycling synchrotron of the Japan Proton Accelerator Research Complex

Compensator design for corrector magnet power supply of TPS facility

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