| Paper | Title | Other Keywords | Page |
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| TU3C3 | Preparation of Low-Energy Heavy Ion Beams in a Compact Linear Accelerator/Decelerator | experiment, injection, electron, rfq | 63 |
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| High precision tests of fundamental theories can often unfold their full potential only by using highly charged ions (HCI) at very low energies. Although in light of the envisaged energies at FAIR, experiments in the keV to MeV range may sound like backpedaling, these two techniques are in fact complementary, since the production of heavy HCI is virtually impossible without prior acceleration and electron stripping. However, subsequent preparation, transport, storage and detection of low-energy HCI bring new, surprising sets of problems and limitations. Here we will give an overview of the CRYRING@ESR local injector and the HITRAP linear decelerator. These two facilities consist out of one or two accelerator or decelerator stages, with a total length of around 10 meters, making them "compact" in comparison to other GSI accelerators. The following sections describe their main design parameters, the achieved ion numbers, challenges of beam detection, as well as some special features such as multi-turn injection and single-shot energy analyzers. The conclusion will present the current status and will also give an outlook of the planned applications of low-energy ions at the FAIR facility. | |||
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Slides TU3C3 [3.244 MB] | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TU3C3 | ||
| About • | Received ※ 20 June 2022 — Revised ※ 01 July 2022 — Accepted ※ 01 July 2022 — Issue date ※ 10 August 2022 | ||
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | ||
| TUP09 | Tuning and RF Measurements of the LILAC RFQ | rfq, emittance, linac, pick-up | 90 |
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| A new linac for the NICA ion collider is under con-struction for JINR at BEVATECH GmbH. As first cavity the 2.5 m long RFQ was manufactured. Within this length it accelerates particles with a mass to charge ratio up to three to an energy of 600 keV/u. The operation frequency is 162.5 MHz and the 4-Rod structure consists of 23 RF cells that need to be adjusted using tuning blocks in order to provide the required field distribution along the electrodes. The status of the manufacturing and the upcoming tuning process including the overall RF setup of the RFQ are summarized in this paper. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TUP09 | ||
| About • | Received ※ 24 June 2022 — Revised ※ 27 June 2022 — Accepted ※ 10 August 2022 — Issue date ※ 19 September 2022 | ||
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | ||
| TUP17 | Beam Dynamics and Space Charge Studies for the InnovaTron Cyclotron | cyclotron, extraction, space-charge, plasma | 108 |
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At IBA a high-intensity compact self-extracting cyclotron is being studied. There is no dedicated extraction device but instead, a special shaping of the magnetic iron and the use of harmonic coils to create large turn-separation. Proton currents up to 5 mA are aimed for. This would open new ways for large-scale production of medical radioisotopes. The main features of the cyclotron are presented. A major variable of the beam simulations is the space charge effect in the cyclotron center. Using the SCALA-solver of Opera3D, we attempt to find the ion source plasma meniscus and the beam phase space and current extracted from it. With these properties known, we study the bunch formation and acceleration under high space charge condition with our in-house tracking code AOC. We also discuss a new tool that automatizes optimization of cyclotron settings for maximizing beam properties such as extraction efficiency.
*Work supported by the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 886190 |
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Poster TUP17 [2.549 MB] | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TUP17 | ||
| About • | Received ※ 28 June 2022 — Revised ※ 10 August 2022 — Accepted ※ 29 September 2022 — Issue date ※ 29 September 2022 | ||
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | ||
| WE2I1 | The New GANIL Beams: Commissioning of SPIRAL 2 Accelerator and Resent Developments | linac, experiment, cyclotron, MMI | 124 |
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| The GANIL installation at Caen in France has been operating with warm temperatures cyclotrons for heavy ion beam physics since 1983. The accelerated stables beams widely ranges from Carbon to Uranium beams. Low energy and post accelerated radioactive ion beams are also being provided. The GANIL laboratory has newly increased their different ion beams available with the installation and commissioning of a superconducting linear accelerator ’ SPIRAL 2 and its experimental areas. The construction started in 2011, the first beam was extracted at low energy in late 2014 with pre-acceleration in 2017 and since 2019 the new installation delivers beam for nuclear physics experiments. This paper will cover the commissioning of the SPIRAL 2 installation at GANIL with its superconducting LINAC - but also the latest development of stable and radioactive beams at the cyclotrons. | |||
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Slides WE2I1 [7.801 MB] | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-WE2I1 | ||
| About • | Received ※ 20 June 2022 — Revised ※ 10 August 2022 — Accepted ※ 25 September 2022 — Issue date ※ 28 September 2022 | ||
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | ||
| TH4C3 | High Intensity Proton Beams at GSI (Heavy Ion) UNILAC | proton, operation, linac, heavy-ion | 170 |
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| A significant part of the experimental program at FAIR is dedicated to pbar physics requiring a high number of cooled pbars per hour. The primary proton beam has to be provided by a 70 MeV proton linac followed by two synchrotrons. The new FAIR proton linac will deliver a pulsed high intensity proton beam of up to 35 mA of 36 µs duration at a repetition rate of 4 Hz. The GSI heavy ion linac (UNILAC) is able to deliver intense heavy ion beam for injection into SIS18, but it is not suitable for FAIR relevant proton beam operation. In an advanced machine investigation program it could be shown, that the UNILAC is able to provide for sufficient high intensities of CH3-beam, cracked (and stripped) in a supersonic nitrogen gas jet into protons and carbon ions. This new operational approach results in up to 3 mA of proton intensity at a maximum beam energy of 20 MeV, 100 µs pulse duration and a rep. rate of 4 Hz. For some time now, UNILAC proton beam operation with higher intensities has been offered as standard for users. Recent linac beam measurements will be presented, showing that the UNILAC is able to bridge the time until the FAIR-proton linac delivers high-intensity proton beams. | |||
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Slides TH4C3 [3.539 MB] | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TH4C3 | ||
| About • | Received ※ 11 June 2022 — Revised ※ 28 June 2022 — Accepted ※ 10 August 2022 — Issue date ※ 29 September 2022 | ||
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | ||