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TU3I1 |
Deceleration of Highly Charged Heavy Ion Beams | |
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| Deceleration of highly charged ions is an important mode for the operation of the ESR storage ring at GSI. Low energy beams of highly charged heavy ions are either required for internal experiments or can be transferred after fast extraction to the low energy storage ring CRYRING@ESR or to the HITRAP facility, in both facilities further deceleration is possible. In order to have high stripping efficiency and sufficient production rate for the highest charge states and rare isotope beams several hundred MeV/u of beam energy are required. After production of the highly charged ions in a stripper foil or rare isotope beams in a thick target the highly charged ions are injected into the ESR at an energy of typically 400 MeV/u. Consecutively the ions can be decelerated to a variable final energy with a minimum energy of 3 MeV/u. The deceleration process is supported by either stochastic cooling at the injection energy or electron cooling available over the whole energy range. The basic challenges and features of beam deceleration in the storage ring will be presented. | ||
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Slides TU3I1 [9.168 MB] | |
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| TU3I2 | Beam Instrumentation, Challenging Tools for Demanding Projects –– a Snapshot from the French Assigned Network | 57 |
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| Particle accelerators are thrusting the exploration of beam production towards several demanding territories, that is beam high intensity, high energy, short time and geometry precision or small size. Accelerators have thus more and more stringent characteristics that need to be measured. Beam diagnostics accompany these trends with a diversity of capacities and technologies that can encompass compactness, radiation hardness, low beam perturbation, or fast response and have a crucial role in the validation of the various operation phases. Their developments also call for specialized knowledge, expertise and technical resources. A snapshot from the French CNRS/IN2P3 beam instrumentation network is proposed. It aims to promote exchanges between the experts and facilitate the realization of project within the field. The network and several beam diagnostic technologies will be exposed. It includes developments of system with low beam interaction characteristics such as PEPITES, fast response detector such as the diamond-based by DIAMMONI, highly dedicated BPM for GANIL-SPIRAL2, emittance-meters which deals with high intensity beams and development for MYRRHA, SPIRAL2-DESIR and NEWGAIN. | ||
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Slides TU3I2 [6.370 MB] | |
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TU3I2 | |
| About • | Received ※ 20 June 2022 — Revised ※ 30 June 2022 — Accepted ※ 10 August 2022 — Issue date ※ 19 September 2022 | |
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| TU3C3 | Preparation of Low-Energy Heavy Ion Beams in a Compact Linear Accelerator/Decelerator | 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) | |