Status of the HIIF RF linac study based on H-mode cavities

Ratzinger, U.; Tiede, R.

doi:10.1016/s0168-9002(98)00389-1

Cited by 40 publications

(31 citation statements)

References 9 publications

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“…This new structure has been named CH structure because of its cross-bar geometry and the H 21 mode [13][14][15]. H-mode cavities have been developed and operated very successfully during the past 30 years [13,16 -20].…”

Section: H-mode Cavitiesmentioning

confidence: 99%

Superconducting CH structure

Podlech

Ratzinger

Klein

et al. 2007

Phys. Rev. ST Accel. Beams

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The superconducting CH structure is a novel multicell cavity for the acceleration of protons and ions in the low and intermediate energy regime. The CH structure is a cross-bar-type cavity; it is the first superconducting low energy multicell cavity operated in an H mode. A superconducting CH-prototype cavity with 19 gaps at 0:1 has been built and tested successfully. Maximum surface fields of 25 MV=m and a corresponding effective cavity voltage gain of 3.7 MV have been achieved. In this paper the development and the tests of this new cavity are presented. This includes also tuning and coupling methods as well as a comparison with other low energy cavities.

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Section: H-mode Cavitiesmentioning

confidence: 99%

Superconducting CH structure

Podlech

Ratzinger

Klein

et al. 2007

Phys. Rev. ST Accel. Beams

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“…A recent development of room-temperature CH-mode structures using KONUS beam dynamics [15] was discussed in Ref. [35].…”

Section: Ch-pmq Linac As a Dtl Replacementmentioning

confidence: 99%

H-mode accelerating structures with permanent-magnet quadrupole beam focusing

Kurennoy

Rybarcyk

O’Hara

et al. 2012

Phys. Rev. ST Accel. Beams

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We have developed high-efficiency normal-conducting rf accelerating structures by combining H-mode resonator cavities and a transverse beam focusing by permanent-magnet quadrupoles (PMQ), for beam velocities in the range of a few percent of the speed of light. The shunt impedance of interdigital H-mode (IH-PMQ) structures is 10-20 times higher than that of a conventional drift-tube linac, while the transverse size is 4-5 times smaller. Results of the combined 3D modeling-electromagnetic computations, multiparticle beam-dynamics simulations with high currents, and thermal-stress analysis-for an IH-PMQ accelerator tank are presented. The accelerating-field profile in the tank is tuned to provide the best propagation of a 50-mA deuteron beam using coupled iterations of electromagnetic and beamdynamics modeling. Measurements of a cold model of the IH-PMQ tank show a good agreement with the calculations. Examples of cross-bar H-mode structures with PMQ focusing for higher beam velocities are also presented. H-PMQ accelerating structures following a short radio-frequency quadrupole accelerator can be used both in the front end of ion linacs or in stand-alone applications.

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“…Such an intensity is much beyond the capabilities of the existing GSI UNILAC and, for this reason, a dedicated proton injector has to be built [1]. This 325.2 MHz proton accelerator will be the the first linac entirely based on CH-structure: this new kind of cavity is in fact characterized by higher shunt impedance in the low-medium beta range when compared with conventional DTL's; moreover, it is well demonstrated that H-mode cavities in combination with KONUS [3] beam dynamics can provide high voltage gains resulting in a compact and efficient design. [2].…”

Section: The New Proton Injector For Fairmentioning

confidence: 99%

Development of a coupled CH structure for the GSI proton injector

Clemente

Podlech

Tiede

et al. 2007

2007 IEEE Particle Accelerator Conference (PAC)

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The FAIR facility, under development at GSI, needs a new dedicated proton injector for the production of intense secondaryp beams. This injector will accelerate protons from 3 to 70 MeV at a current of 70 mA, and due to the high voltage gain and shunt impedance will be based on CH cavities powered by 6 2.5 MW, 325 MHz klystrons. An innovative coupling cell containing one drift tube of length N βλ was developed to combine multicell drift tube modules of the CH-type (H 211 mode). In order to study this coupling mechanism a 1:2 scaled model of the second resonator of GSI proton injector was fabricated at IAP and it ready for testing. The according full scale prototype, a 3 meter long coupled resonator from 11.7 MeV to 24.1 MeV is under development and will be power tested with a 2.5 MW klystron at GSI early in 2009. This paper describes in detail the coupled structure together with a general overview of the R&D results achieved on the CH-DTL's cavity.

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Status of the HIIF RF linac study based on H-mode cavities

Cited by 40 publications

References 9 publications

Superconducting CH structure

Superconducting CH structure

H-mode accelerating structures with permanent-magnet quadrupole beam focusing

Development of a coupled CH structure for the GSI proton injector

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