Superconducting ECR ion source: From 24-28 GHz SECRAL to 45 GHz fourth generation ECR

Zhao, Hongwei; Sun, Limin; Guo, Junwei; Zhang, W. H.; Wang, Lu; Wu, Wei; Wu, Beimin; Sabbi, G.; Juchno, M.; Hafalia, A.R.; Ravaioli, Emmanuele; Xie, D. Z.

doi:10.1063/1.5017479

Cited by 30 publications

(9 citation statements)

References 23 publications

(47 reference statements)

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“…SECRAL [3], one of the best performing third generation superconducting ECR sources, can be one of the operational ion sources for HIAF operation. 45 GHz FECR [4] (first fourth generation ECR ion source), which is being developed at Institute of Modern Physics (IMP), will meet the HIAF requirement for high intensity of those heavy ion beams. A 2.45 GHz proton source can be employed to supply H 3 þ beam.…”

Section: Hiaf Front Endmentioning

confidence: 99%

Heavy ion accelerator facility front end design and commissioning

Yang

Sun

Zhai

et al. 2019

Phys. Rev. Accel. Beams

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A new project, high intensity heavy ion accelerator facility (HIAF), is currently under design and construction in China. The HIAF front end, composed of electron cyclotron resonance (ECR) ion sources, low energy beam transport (LEBT) and radio frequency quadrupole (RFQ), will produce and provide beams of ions with a mass up to uranium at a beam energy of 0.5 MeV=u. The typical beam intensity is designed up to 2 emA for the uranium beam with a charge state of 35þ. This paper presents an overall design of the front end for HIAF and discusses several key issues in the design. By modeling the beam extraction from the ECR source, we got a reliable starting beam condition to perform the design. Transverse coupling of the beam from the source was elaborated. To relieve the coupling we implanted two solenoids after the source. Space charge effect in the charge state selection of the ion source was evaluated. An overall space charge compensation degree of no less than 70% was predicted. A beam dynamics simulation was performed by using the initial particle distribution obtained from the extraction modeling. The simulation resulted in development of a beam collimation system in the LEBT to confine the transverse emittance. The RFQ design will follow the development of LEAF-RFQ at Institute of Modern Physics, which has successfully commissioned with several beams and demonstrated as an excellent design. Recent beam commissioning results of LEAF-RFQ will also be presented in this paper.

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Section: Hiaf Front Endmentioning

confidence: 99%

Heavy ion accelerator facility front end design and commissioning

Yang

Sun

Zhai

et al. 2019

Phys. Rev. Accel. Beams

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“…The interest of high frequency ECR ion source [1] is constantly growing from the last decades with several projects, such as the 45 GHz supraconducting ECR ion source from IMP [2] and Berkeley [3]. In this frame, in 2014, the 60 GHz ECR ion source, SEISM (Sixty gigahErtz Ion Source using Megawatt magnets), produced its first ion beams with a current density up to J ≈1 A cm −2 [4] using a CUSP magnetic configuration [5] with a closed ECR surface of 2.14 T. These results were obtained with a 1 mm diameter plasma electrode to manage the beam in a low acceptance beam line.…”

Section: Introductionmentioning

confidence: 99%

Status and prospects of the 60 GHz SEISM ion source

André

Angot

Baylac

et al. 2022

J. Phys.: Conf. Ser.

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SEISM is a unique ECR ion source operating at a frequency of 60 GHz. The prototype is based on a simple magnetic geometry, the cusp, allowing the use of polyhelix coils (developed with LNCMI, Grenoble) to generate the closed ECR surface at 2.14T. The plasma is sustained by a high intensity HF pulse (up to 300kW). Previous experiments at LNCMI have successfully demonstrated the establishment of the nominal magnetic field and the extraction of ion beams with a current density up to 1 A cm-2. The presence of afterglow peaks was also observed, proving the existence of ion confinement in a CUSP ECR source. An experimental campaign is carried out in 2021 using a new transport line designed to improve the transmission of the beam to the new detectors. Short and long-term research plans are presented to transform this high current density into a high intensity ion beam that can be used for accelerators of the future.

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“…Based on the effective construction and successful operation of HIRFL [9], a new facility named High-Intensity Heavy-Ion Accelerator Facility (HIAF) [10] has been proposed and designed by the Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), in 2009. As indicated in Figure 1, the HIAF comprises a SECR (superconducting electron-cyclotron-resonance ion source) [11], a superconducting iLinac [12], a high-intensity synchrotron BRing (booster ring) [10], a multifunction high-precision synchrotron SRing (spectrometer ring) [13], and a superconducting radioactive beam line HFRS (fragment separator) [14] to connect the two rings. As a more powerful facility, HIAF can provide intense primary and radioactive ion beams for nuclear physics [15][16][17], plasma physics [18], atomic physics [19], and related research fields.…”

Section: Introductionmentioning

confidence: 99%

Longitudinal Beam Dynamics for the Heavy-Ion Synchrotron Booster Ring at HIAF

et al. 2021

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To accelerate high-intensity heavy-ion beams to high energy in the booster ring (BRing) at the High-Intensity Heavy-Ion Accelerator Facility (HIAF) project, we take the typical reference particle 238U35+, which can be accelerated from an injection energy of 17 MeV/u to the maximal extraction energy of 830 MeV/u, as an example to study the basic processes of longitudinal beam dynamics, including beam capture, acceleration, and bunch merging. The voltage amplitude, the synchronous phase, and the frequency program of the RF system during the operational cycle were given, and the beam properties such as bunch length, momentum spread, longitudinal beam emittance, and beam loss were derived, firstly. Then, the beam properties under different voltage amplitude and synchronous phase errors were also studied, and the results were compared with the cases without any errors. Next, the beam properties with the injection energy fluctuation were also studied. The tolerances of the RF errors and injection energy fluctuation were dictated based on the CISP simulations. Finally, the effect of space charge at the low injection energy with different beam intensities on longitudinal emittance and beam loss was evaluated.

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Superconducting ECR ion source: From 24-28 GHz SECRAL to 45 GHz fourth generation ECR

Cited by 30 publications

References 23 publications

Heavy ion accelerator facility front end design and commissioning

Heavy ion accelerator facility front end design and commissioning

Status and prospects of the 60 GHz SEISM ion source

Longitudinal Beam Dynamics for the Heavy-Ion Synchrotron Booster Ring at HIAF

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