Superconducting low-velocity linac for the Argonne positive-ion injector

Shepard, K.W.; Markovich, P.; Zinkann, G.; Clifft, B.E.; Benaroya, R.

doi:10.1109/pac.1989.73319

Cited by 7 publications

(5 citation statements)

References 1 publication

(1 reference statement)

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“…A 3-stub, 4-gap QWR has been developed as well [30]. Very low-β, 4-gap QWR cavities have been obtained by means of a forked inner conductor and a grounded drift tube between the two branches [31]. SRRs and forked QWRs, although successfully used for decades and still in operation, are being progressively replaced by the last generation of QWRs and normal conducting RFQs, respectively.…”

Section: Tm Mode Cavitiesmentioning

confidence: 99%

“…Two still include SRRs [110] and one includes SC RFQs [51]. Most of the operating machines are based on full Nb resonators technology, while three make use of sputtered NbCu cavities [78,79,111]; one includes QWRs with parts made of explosive-bonded Nb on Cu [31]. One is still using Pb plated, Cu resonators [112], and one PbSn plated ones [113].…”

Section: Operating Linacsmentioning

confidence: 99%

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Low- to medium-β cavities for heavy ion acceleration

Facco¹

2016

Supercond. Sci. Technol.

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Acceleration of low- and medium-β heavy ions by means of superconducting (SC) linear accelerators (linacs) was made possible by the development, during four decades, of a particular class of cavities characterized by low operation frequency, several different shapes and different electromagnetic modes of operation. Their performance, initially rather poor in operating accelerators, have steadily increased along with the technological progress and nowadays the gap with the high-β, elliptical cavities is close to be filled. Initially confined to a very small number of applications, this family of cavities evolved in many directions becoming one of the most widespread in linacs. Nowadays it is present in the majority of superconducting radio-frequency ion linac projects worldwide. An overview of low- and medium-β SC cavities for heavy ions, focused on their recent evolution and achievements, will be given.

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Section: Tm Mode Cavitiesmentioning

confidence: 99%

Section: Operating Linacsmentioning

confidence: 99%

Low- to medium-β cavities for heavy ion acceleration

Facco¹

2016

Supercond. Sci. Technol.

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“…The Efficiency and Intensity upgrade consisted of a new RFQ [6] and a new superconducting cryomodule [7]. The RFQ replaced the first three superconducting cavities of the Positive Ion Injector (PII) [8] to avoid deterioration of the beam quality due to the fast acceleration of low energy beams. The RFQ uses the existing multi-harmonic buncher (MHB) [9] as a pre-buncher.…”

Section: Introductionmentioning

confidence: 99%

The ATLAS multi-user upgrade and potential applications

et al. 2017

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With the recent integration of the CARIBU-EBIS charge breeder into the ATLAS accelerator system to provide for more pure and efficient charge breeding of radioactive beams, a multi-user upgrade of the ATLAS facility is being proposed to serve multiple users simultaneously. ATLAS was the first superconducting ion linac in the world and is the US DOE low-energy Nuclear Physics National User Facility. The proposed upgrade will take advantage of the continuous-wave nature of ATLAS and the pulsed nature of the EBIS charge breeder in order to simultaneously accelerate two beams with very close mass-to-charge ratios; one stable from the existing ECR ion source and one radioactive from the newly commissioned EBIS charge breeder. In addition to enhancing the nuclear physics program, beam extraction at different points along the linac will open up the opportunity for other potential applications; for instance, material irradiation studies at ∼1 MeV/u, isotope production and radiobiological studies at ∼6 MeV/u and at the full ATLAS energy of ∼15 MeV/u. The concept and proposed implementation of the ATLAS multi-user upgrade will be discussed. Future plans to enhance the flexibility of this upgrade will be presented. K: Accelerator Applications; Accelerator modelling and simulations (multi-particle dynamics; single-particle dynamics); Accelerator Subsystems and Technologies; Ion sources (positive ions, negative ions, electron cyclotron resonance (ECR), electron beam (EBIS))1Corresponding author.

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“…In early 1989, however, a superconducting injector linac was added to the Argonne linac, replacing the tandem injector, and making it the first stand-alone SC heavy-ion linac ( Fig. 1 -L) [35,41].…”

Section: Low-velocity Accelerating Structuresmentioning

confidence: 99%