Development of superconducting cavities for high intensity proton accelerator at JAERI

Ouchi, Nobuo; Kusano, Joichi; Akaoka, N.; Takeuchi, S.; Hasegawa, K.; Mizumoto, M.; Inoue, Hitoshi; Kako, E.; Noguchi, S.; Ono, Masaaki; Saito, Kenji; Shishido, T.; Mukugi, K.; Honda, Y.

doi:10.1109/77.783473

Cited by 6 publications

(11 citation statements)

References 1 publication

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“…A number of lower-β elliptical cavity prototypes have now been built by various laboratories [2,3,4,5,6,7,8,9,10]. Moreover, the Spallation Neutron Source (SNS) is using superconducting elliptical cavities with β = 0.61 and β = 0.81 for the SNS linac.…”

Section: Introductionmentioning

confidence: 99%

“…Although SNS uses normal conducting cavities for velocities below the reach of the SNS β = 0.61 cavity, single-cell prototypes of elliptical cavities for even lower β values have been prototyped at several laboratories: two β = 0.48 cavities (700 MHz) were tested by Los Alamos [2]; a β = 0.45 cavity (1.3 GHz) was tested by KEK [3]; two β = 0.5 cavities (600 MHz) were tested by JAERI [4]; a β = 0.47 cavity (700 MHz) was tested by INFN-Milano and Saclay [10]. Encouragingly, the desired gradients and quality factors were exceeded in all of these single-cell tests.…”

Section: Introductionmentioning

confidence: 99%

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805 MHz Beta = 0.47 Elliptical Accelerating Structure R & D

Bricker¹,

Compton²,

Hartung³

et al. 2008

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A 6-cell 805 MHz superconducting cavity for acceleration in the velocity range of about 0.4 to 0.53 times the speed of light was designed. After single-cell prototyping, three 6-cell niobium cavities were fabricated. In vertical RF tests of the 6-cell cavities, the measured quality factors (Q 0 ) were between 7 · 10 9 and 1.4 · 10 10 at the design field (accelerating gradient of 8 to 10 MV/m). A rectangular cryomodule was designed to house 4 cavities per cryomodule. The 4-cavity cryomodule could be used for acceleration of ions in a linear accelerator, with focussing elements between the cryomodules. A prototype cryomodule was fabricated to test 2 cavities under realistic operating conditions. Two of the 6-cell cavities were equipped with helium tanks, tuners, and input coupler and installed into the cryomodule. The prototype cryomodule was used to verify alignment, electromagnetic performance, frequency tuning, cryogenic performance, low-level RF control, and control of microphonics.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

805 MHz Beta = 0.47 Elliptical Accelerating Structure R & D

Bricker¹,

Compton²,

Hartung³

et al. 2008

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“…The detuning is periodic from pulse to pulse. The amount of the static detuning was in agreement with the simulation [14] within a few percent. The frequency component of the dynamic detuning is mainly 50 Hz and 810 Hz with amplitudes of 4˚ and 8˚, respectively.…”

Section: Linacsupporting

confidence: 73%

The present status of the JAERI/KEK joint project for high-intensity proton accelerators

Yamazaki

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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The high-intensity proton accelerator facility in Japan comprising a 600-MeV linac, a 3-GeV rapid-cycling synchrotron, and a 50-GeV synchrotron, has been officially approved for the construction of its Phase I. The Phase I includes the 1-MW pulsed spallation neutron source, but the 50-GeV ring can be operated up to only 30 GeV. The linac energy is limited to 400 MeV, which is not high enough for the accelerator-driven nuclear waste transmutation system. The present status of the project is presented, including the result of the performance test of the already constructed components.

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“…Though SNS will use normal conducting cavities for velocities below the reach of the SNS 0:61 cavity, single-cell prototypes of elliptical cavities for even lower values have been prototyped at several laboratories: two 0:48 cavities (700 MHz) were tested by Los Alamos [2]; a 0:45 cavity (1.3 GHz) was tested by KEK [3]; two 0:5 cavities (600 MHz) were tested by JAERI [4]; a 0:47 cavity (700 MHz) was tested by INFN-Milano and Saclay [10]. Encouragingly, the desired gradients and quality factors were exceeded in all of these single-cell tests.…”

Section: Introductionmentioning

confidence: 99%

“…A number of lowerelliptical cavity prototypes have now been built in France, Germany, Italy, Japan, and the United States [2][3][4][5][6][7][8][9][10]. Moreover, the Spallation Neutron Source (SNS), presently under construction, adopted superconducting elliptical cavities with 0:61 and 0:81 for the SNS linac.…”

Section: Introductionmentioning

confidence: 99%

Prototyping of a multicell superconducting cavity for acceleration of medium-velocity beams

Compton

Grimm

Hartung

et al. 2005

Phys. Rev. ST Accel. Beams

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Three 6-cell 805 MHz superconducting cavity prototypes for acceleration in the velocity range of about 0.4 to 0.53 times the speed of light have been fabricated and tested. The quality factors (Q 0 ) were between 7 10 9 and 1:4 10 10 at the design field (accelerating gradient of 8-10 MV=m). The maximum gradients reached were between 11 and 16 MV=m; in each case, the Q 0 values were 3 10 9 at the maximum gradient. The design, fabrication, surface preparation, and rf testing of the 6-cell cavities are reported in this paper.

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Development of superconducting cavities for high intensity proton accelerator at JAERI

Cited by 6 publications

References 1 publication

805 MHz Beta = 0.47 Elliptical Accelerating Structure R & D

805 MHz Beta = 0.47 Elliptical Accelerating Structure R & D

The present status of the JAERI/KEK joint project for high-intensity proton accelerators

Prototyping of a multicell superconducting cavity for acceleration of medium-velocity beams

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