Highlights from the first beam commissioning stage at ESS for its ion source and low energy beam transport

Miyamoto, Ryoichi; Derrez, Clement; Donegani, Elena; Eshraqi, Mohammad; Gålnander, Björn; Hassanzadegan, Hooman; Laface, Emanuele; Levinsen, Yngve; Milas, Natalia; Muñoz, Marc; Nilsson, Emelie; Plostinar, Ciprian; Sosa, A.; Tarkeshian, R.; Thomas, Cyrille

doi:10.1088/1748-0221/15/07/p07027

Cited by 5 publications

(5 citation statements)

References 7 publications

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“…Beam commissioning of these sections at the ESS site started in September 2018. In [22,23] an overview on this first beam commissioning period at ESS, with the results of the source characterization and testing on LEBT functionalities, has been provided.…”

Section: Ion Source and Lebtmentioning

confidence: 99%

The Italian contribution to the construction of the linac for the European spallation source

2021

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The European spallation source (ESS) uses a linear accelerator (linac) to deliver the high intensity proton beam to the target station for producing intense beams of neutrons. At the exit of the linac, the proton beam will have 2 GeV energy and 62.5 mA current. The construction of an accelerator with the contribution of different laboratories is not a new concept but so far the laboratories were controlled by the same government (e.g. in USA and Japan) or they delivered components for an intergovernmental institution like CERN. The European Spallation Source is a research facility that gathers 40 active in-kind (IK) contributors from 13 States, even outside the European Union, so its construction is not only a technical and scientific challenge, but also an economic, political and social experiment. The case of the Italian contribution is interesting because of the structure of Italian industrial ecosystem, mostly based on small and medium-sized enterprises (SME), which may be unsuitable for the case of a research infrastructure which construction requires a high level of R&D investments. Conversely, the well-known flexibility of SME to adapt to the requirements have balanced the weakness and the results are satisfactory. Following the overview of the Linac design, the paper will focus on the key issues of the Italian contribution, the state of the project (73% completion up to now) along with the point of view of the ESS management and the lesson learnt; the major outcomes for the economy and society will complete the discussion.

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Section: Ion Source and Lebtmentioning

confidence: 99%

The Italian contribution to the construction of the linac for the European spallation source

2021

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“…The values of normalized emittance and twiss parameters were calculated by IBSimu. The gas pressure would be ∼mPa when the equipment working, and the value of space charge neutralization was set to 0.9 according to relevant experiment [16,17] and simulation [7,18] reports. Figure 4 presents the simulated trajectory envelopes of the hydrogen ion beam and distribution of space phase at the acceleration tube entrance.…”

Section: Beam Transmission Simulationmentioning

confidence: 99%

“…The ECR ion source and pre-analysis system are designed to provide and transport 35 mA and 50 keV CW D + 1 beams for neutron production, and 50 mA and 50 keV CW proton beams for commissioning. The commonly used scheme for the low-energy transmission line of a high-current ion beam features a combination of double solenoids (such as IFMIF [6] and ESS [7]). The beam line of this combination of double solenoids is short, and can be used to control the increase in emissivity.…”

Section: Introductionmentioning

confidence: 99%

Designing and commissioning pre-analysis system for intense D-D/D-T neutron generator

Wei

Pan

et al. 2021

J. Inst.

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An intense accelerator-based D-D/D-T neutron generator, with neutron yields of 6 × 10 10 n/s due to the D-D reaction and 6 × 10 12 n/s due to the D-T reaction, is being developed at Lanzhou University in China. The 2.45 GHz electron cyclotron resonance (ECR) ion source and the pre-analysis system, as the front injector for the accelerator tube of the neutron generator, are designed to provide a 35 mA deuterium beam for neutron production and a 50 mA proton beam for commissioning. The pre-analysis system consists of a solenoid, a steering magnet, a vacuum chamber, a dipole magnet, three quadrupole magnets, a beam dump, and a Faraday cup. The ion source and pre-analysis system were completed a trial operation, and the intensity of the proton beam measured at the end of the pre-analysis system was higher than 50 mA when the hydrogen ion beam current extracted from the ECR ion source was greater than 70 mA.

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“…Electron Cyclotron Resonance Ion Sources (ECRIS) are widely used for proton sources as the front end of high-power accelerators such as LEHIPA, ESS, FAIR and Peking University [1][2][3][4][5]. In Low Energy High Intensity Proton Accelerator (LEHIPA), 50 keV proton beam is accelerated to 20 MeV in two different types of cavities.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation of the proton fraction in a three electrode 2.45 GHz ECR ion source

Kewlani,

Gharat,

Roychowdhury

et al. 2024

J. Inst.

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The ion beam extracted from a proton ion source contains H+ ion along with H2 + and H3 + molecular ions. In this work, the ionic fractions in the extracted beam of ECR ion source were measured using an analyzing magnet. A computerized proton fraction measurement setup is described in detail with instrumentation and control for pulsed operation of the ECR ion source. A timing diagram has been incorporated for trigger synchronization illustrating the process of pulsing the plasma, controlling the analyzing magnet parameters and acquiring data about the magnetic field and beam current. The proton fraction was measured in two cases, in the first case using SS304 plasma chamber and in the second case incorporating aluminium (Al) cylinder and boron nitride (BN) plates inside the plasma chamber. In the first case, the proton fraction was found to be in the range of ∼60% and in the second case because of the presence of secondary electron donors it increased to 93%. In order to understand the enhancement of H+ fraction in the hydrogen plasma, plasma parameters (ne , Te and EEDF) and its dependence on microwave power and neutral gas pressure were investigated.

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Highlights from the first beam commissioning stage at ESS for its ion source and low energy beam transport

Cited by 5 publications

References 7 publications

The Italian contribution to the construction of the linac for the European spallation source

The Italian contribution to the construction of the linac for the European spallation source

Designing and commissioning pre-analysis system for intense D-D/D-T neutron generator

An experimental investigation of the proton fraction in a three electrode 2.45 GHz ECR ion source

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