Status of the Trasco Intense Proton Source and emittance measurements

Celona, L.; Ciavola, G.; Gammino, S.; Chines, F.; Presti, M.; Andò, L.; Guo, Xuan; Gobin, R.; Ferdinand, R.

doi:10.1063/1.1690477

Cited by 20 publications

(9 citation statements)

References 3 publications

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“…2.45 GHz ECR discharges similar to TIPS are widely used as high-current light ion sources, in particular, for proton beam production. [17][18][19][20][21] In such application, the properties of the plasma have a strong effect on the quality of the extracted ion beam, which is typically characterized by the transverse emittance () of the beam, which must be matched with the acceptance of the subsequent accelerator in ðx; x 0 Þ; ðy; y 0 Þ phase space. The quality of an ion beam is defined in terms of current and emittance.…”

Section: Discussionmentioning

confidence: 99%

Time resolved measurements of hydrogen ion energy distributions in a pulsed 2.45 GHz microwave plasma

et al. 2017

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A plasma diagnostic study of the Ion Energy Distribution Functions (IEDFs) of H þ , H þ 2 , and H þ 3 ions in a 2.45 GHz hydrogen plasma reactor called TIPS is presented. The measurements are conducted by using a Plasma Ion Mass Spectrometer with an energy sector and a quadrupole detector from HIDEN Analytical Limited in order to select an ion species and to measure its energy distribution. The reactor is operated in the pulsed mode at 100 Hz with a duty cycle of 10% (1 ms pulse width). The IEDFs of H þ , H þ 2 , and H þ 3 are obtained each 5 ls with 1 ls time resolution throughout the entire pulse. The temporal evolution of the plasma potential and ion temperature of H þ is derived from the data. It is shown that the plasma potential is within the range of 15-20 V, while the ion temperature reaches values of 0.25-1 eV during the pulse and exhibits a fast transient peak when the microwave radiation is switched off. Finally, the ion temperatures are used to predict the transverse thermal emittance of a proton beam extracted from 2.45 GHz microwave discharges.

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Section: Discussionmentioning

confidence: 99%

Time resolved measurements of hydrogen ion energy distributions in a pulsed 2.45 GHz microwave plasma

et al. 2017

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“…τ i can be modified in many ways, for example by modifying the magnetic field or the dimension of the plasma chamber. Since the VIS magnetic field is generated by permanent magnets [11], modifying the magnetic field required shifting the magnetic assembly along the plasma chamber. These are further investigated in Section 3.2.…”

Section: Versatile Ion Source (Vis)mentioning

confidence: 99%

The IsoDAR high intensity H₂⁺transport and injection tests

et al. 2015

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This technical report reviews the tests performed at the Best Cyclotron Systems, Inc. facility in regards to developing a cost effective ion source, beam line transport system, and acceleration system capable of high H + 2 current output for the IsoDAR (Isotope Decay At Rest) experiment. We begin by outlining the requirements for the IsoDAR experiment then provide overview of the Versatile Ion Source, Low Energy Beam Transport system, spiral inflector, and cyclotron. The experimental measurements are then discussed and the results are compared with a thorough set of simulation studies. Of particular importance we note that the Versatile Ion Source (VIS) proved to be a reliable ion source capable of generating a large amount of H + 2 current. The results suggest that with further upgrades, the VIS could potentially be a suitable candidate for IsoDAR. The conclusion outlines the key results from our tests and introduces the forthcoming work this technical report has motivated.

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“…This source, originally designed for the TRASCO/ADS project, satisfies the requirements either in terms of proton current (more than 40 mA from a 6 mm hole, above 60 mA from an 8 mm hole) at 80 kV and in terms of ε rms ≤ 0.2π mm mrad. Its measured reliability over 1 week exceed, 99% [4,5].…”

Section: Introductionmentioning

confidence: 96%

Intense beam production with ECR ion sources

Ciavola¹,

Gammino²

2005

Radiation Effects and Defects in Solids

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Electron cyclotron resonance ion sources are now able to attain a beam current as high as some milliamperes, which until a few years ago was obtained only for pulsed laser ion sources with a much higher emittance and energy spread, by keeping also the possibility to produce high charge states close to electron beam ion sources, at much higher intensity. They usually operate at frequencies up to 18 GHz, but now many sources are able to operate or will be able, at 28 GHz frequency or more, with plasma density of the order of 10 13 cm −3 , much higher than any other source of the previous generation. The state-of-the-art technique will be described along with the major characteristics of the upcoming sources.

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Status of the Trasco Intense Proton Source and emittance measurements

Cited by 20 publications

References 3 publications

Time resolved measurements of hydrogen ion energy distributions in a pulsed 2.45 GHz microwave plasma

Time resolved measurements of hydrogen ion energy distributions in a pulsed 2.45 GHz microwave plasma

The IsoDAR high intensity H₂⁺transport and injection tests

Intense beam production with ECR ion sources

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Status of the Trasco Intense Proton Source and emittance measurements

Cited by 20 publications

References 3 publications

Time resolved measurements of hydrogen ion energy distributions in a pulsed 2.45 GHz microwave plasma

Time resolved measurements of hydrogen ion energy distributions in a pulsed 2.45 GHz microwave plasma

The IsoDAR high intensity H2+transport and injection tests

Intense beam production with ECR ion sources

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The IsoDAR high intensity H₂⁺transport and injection tests