Measurement of RF characteristics of magnetic alloys for an RF cavity of the accumulator cooler ring

Watanabe, Michio; Chiba, Yoshiaki; Katayama, Tsuneo; Koseki, T.; Ohtomo, K.; Tsutsui, Hatsumi

doi:10.1016/j.nima.2004.06.090

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…However, we have experience to investigate the characteristics of MA cores at frequencies from 1 to 50 MHz as one of the R&D's of the RIBF project. 7) In the study, it was confirmed that an MA-loaded cavity is also practically useful in the higher frequency range up to 50 MHz and that an MA called FINEMET (FT-3M), which is made by Hitachi Metals, 8) has excellent properties as the core material for an rf cavity in the required frequency region. FINEMET is an iron-based nanocrystalline MA and the core is made of thin tape, which is coated with SiO 2 and wound into a toroidal shape.…”

Section: Introductionmentioning

confidence: 80%

“…The temperature of the cores saturated after 30 min from the start and the temperature rise was 15 -25 C after two hours of operation. Since the rf characteristics of the FINEMET do not change with the temperature rise because of its high Curie temperature of 570 C, 3,7) the cooling power of the present system is sufficient for the routine operation in the HiECR beam transport line.…”

Section: Beam Testmentioning

confidence: 99%

“…On the basis of the results given in ref. 7, we have decided to use FINEMET as the core material of the buncher cavity of the HiECR beam transport line and to apply the ''cut-core configuration'' to install the cores in the buncher cavity. The cut-core configuration involves cutting the toroidal core into two circular halves and setting them with appropriate air gaps between the two circular halves.…”

Section: Introductionmentioning

confidence: 99%

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Broadband Buncher Cavity for Beam Transport Line of HiECR Ion Source

Koseki

Watanabe

et al. 2006

jjap

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PACS. 72.20.M -Galvanomagnetic and other magnetotransport effects.PACS. 73.40L -Semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions.Abstract. -We extend the model of McEuen et al. based on Biittiker's edge channel approach of the quantum Hall effect to predict the resistances measured on interior contacts, taking interchannel scattering into account by attaching fictitious voltage probes to the Hall conductor. I t is shown that interior contacts are very sensitive probes of the interchannel scattering. Between the i = 2 and i = 3 Hall plateaux, the interchannel scattering length L,,,t, is found to vary quasi-exponentially with the magnetic field B, with a value of Lscatt = 0.5 mm a t B = 3.5 T to Lscatt = 10 mm at B = 4.3 T.Carrier transport in the quantum Hall effect [l] (QHE) was first described using a 2 x 2 conductivity tensor Q. However, it has been recently demonstrated experimentally [2-41 that for low temperatures (T< 4 K) and low driving currents ( I < 100 nA), a description

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Section: Introductionmentioning

confidence: 80%

Section: Beam Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Broadband Buncher Cavity for Beam Transport Line of HiECR Ion Source

Koseki

Watanabe

et al. 2006

jjap

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“…Figure 1 showes the MA-loaded cavity structure, it is a λ/4 single gap coaxial resonator structure of 700 mm in length without a flange plate. The coaxial inductance [7] of the cavity loaded with MA cores is expressed as…”

Section: Ma Materials and Ma-loaded Cavitymentioning

confidence: 99%

An untuned MA-loaded cavity for HIRFL-CSR

Mei

Yuan

et al. 2010

Chinese Phys. C

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In order to realize high energy density physics and plasma physics research at HIRFL-CSR, a magnetic alloy (MA)-loaded cavity has been studied. According to the theoretical calculation and simulation for the MA-loaded cavity, we achieved a better result. The MA-loaded cavity had a higher μQf value, with a higher shunt impedance and a higher accelerating gradient. The accelerating gradient was about 95 kV/m at 1.8003 MHz, 130 kV/m at 0.9000 MHz. Compared with the ferrite-loaded cavities that are used at HIRFL-CSR, with about 10 kV/m accelerating gradient, the MA-loaded cavity obviously has an advantage. The results of the theoretical calculation and the simulation, which meet the design requirements are in good agreement.

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MA-core loaded untuned RF compression cavity for HIRFL-CSR

Mei

Yuan

et al. 2012

Nuclear Instruments and Methods in Physics Research Section A:

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Measurement of RF characteristics of magnetic alloys for an RF cavity of the accumulator cooler ring

Cited by 4 publications

References 2 publications

Broadband Buncher Cavity for Beam Transport Line of HiECR Ion Source

Broadband Buncher Cavity for Beam Transport Line of HiECR Ion Source

An untuned MA-loaded cavity for HIRFL-CSR

MA-core loaded untuned RF compression cavity for HIRFL-CSR

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