Development of a low-energy radioactive ion beam facility for the MARA separator

Papadakis, P.; Moore, I. D.; Pohjalainen, I.; Sarén, J.; Uusitalo, J.

doi:10.1007/s10751-016-1364-8

Cited by 9 publications

(8 citation statements)

References 27 publications

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“…The high vacuum of MARA (∼10 −8 mbar) is separated from the gas cell by a thin entrance window. The entrance window thickness and material may be adjusted accordingly depending on the reaction of interest, see for example the discussion in [1]. Interchangeable exit nozzles allow the use of exit holes with different diameters or "de Laval" nozzles [9] designed for specific gas jet Mach number.…”

Section: Current Status Of the Mara-leb Facilitymentioning

confidence: 99%

“…Dedicated novel experimental setups and techniques are required to achieve this. The MARA Low-Energy Branch (MARA-LEB) [1] will provide the efficiency and selectivity required to study exotic nuclei close to the proton drip line, opening the path to laser spectroscopy and mass measurements in this region.…”

Section: Introductionmentioning

confidence: 99%

“…99−101 In) [6]. Other cases of interest, particularly for laser ionisation and spectroscopy, were reported in [1].…”

Section: Introductionmentioning

confidence: 99%

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Status and development of the MARA low-energy branch

Papadakis¹,

Moore²,

Eronen³

et al. 2018

AIP Conference Proceedings

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The MARA Low-Energy Branch is under development at the Accelerator Laboratory of the University of Jyväskylä. The facility will be employed for laser ionisation and spectroscopy studies and for mass measurements of nuclei close to the proton drip line. This article presents an updated status of the ongoing development of the different parts of this facility, including the buffer gas cell, the ion transport system, the laser system and the detector stations.

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Section: Current Status Of the Mara-leb Facilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Status and development of the MARA low-energy branch

Papadakis¹,

Moore²,

Eronen³

et al. 2018

AIP Conference Proceedings

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“…has already proven to be an effective tool for the production of isotopes for research on the proton-rich side of beta stability. Its expansion, MARA-LEB, the low-energy branch of MARA, will utilize the gas cell technique and laser ionization of the recoils stopped and neutralized in flowing noble gas, providing a means to convert MeV-scale radioactive beams to low-energy ones [17,18].…”

Section: Introductionmentioning

confidence: 99%

Radioactive ion beam manipulation at the IGISOL-4 facility

et al. 2020

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The IGISOL-4 facility in the JYFL Accelerator Laboratory of the University of Jyvaskyla (JYFL-ACCLAB) produces low-energy radioactive ion beams, primarily for nuclear spectroscopy, utilizing an ion guide-based, ISOL-type mass separator. Recently, new ion manipulation techniques have been introduced at the IGISOL-4 including the application of the PI-ICR (Phase-Imaging Ion Cyclotron Resonance) technique at the JYFLTRAP Penning trap, as well as commissioning of a Multi-Reflection Time-Of-Flight (MR-TOF) separator/spectrometer. The successful operation of the MR-TOF also required significant improvement of the Radio-Frequency Quadrupole (RFQ) cooler and buncher device beam pulse time structure. In addition, laser ionization techniques have been developed for particular cases, for example, a hot cavity laser ion source for silver production. A new stable isotope ion source and a beam line has been introduced for tuning and calibration purposes. In addition to the installations at the IGISOL-4 facility, the extension of the vacuum-mode recoil separator MARA (Mass Analysing Recoil Apparatus), MARA-LEB (MARA Low Energy Branch) has been under development. MARA-LEB will utilize the gas-cell technique and laser ionization to convert MeV-scale radioactive beams to low-energy ones.

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“…In order to further investigate the limits of the attainable spectral resolution of the in-gas-jet method, an in-depth understanding and characterization of the gas jet formation is required, especially as the in-gas-jet method will be implemented in the next generation of radioactive ion beam (RIB) facilities, such as S 3 -LEB at SPIRAL2 of GANIL (France) [25], MARA separator at University of Jyväskylä (Finland) [26], GALS setup at JINR (Russia) [27], KISS and PALIS setups at RIKEN RIBF (Japan) [28,29], and SHIP setup at GSI (Germany), for the laser spectroscopy studies of radioactive nuclei. An overview of the isotopes that can be studied with the in-gas-jet method, considering their production cross sections and assuming a primary intensity of a heavy ion beam of 10 pμA, an efficiency of the method of 10%, and yields of 0.1 p.p.s.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Supersonic Gas Jets for High-Resolution Laser Ionization Spectroscopy of Heavy Elements

et al. 2018

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The method of laser spectroscopy in supersonic gas jets was proposed for high-resolution and highefficiency in-gas laser ionization and spectroscopy studies of short-lived nuclei. The flow properties of such supersonic gas jets have been characterized under off-line conditions. Planar laser-induced fluorescence spectroscopy of seeded copper atoms has been applied to nonintrusively measure velocity, temperature, and relative density profiles of gas jets formed by different de Laval nozzles. For validation, planar laserinduced fluorescence spectroscopy was applied on supersonic free jets with well-known flow parameters. The performance of the in-gas-jet laser spectroscopy method is determined by the achievable spectral resolution, which requires an optimization and a precise manufacturing of the nozzle inner contour as well as a pressure matching of the background medium at the nozzle exit. Our studies now enable a thorough understanding and quantification of these requirements and a determination of the final performance of the in-gas-jet method. Additionally, a comparison between the experimental results and the numerical calculations was performed for the temperature, velocity, and Mach number profiles of underexpanded and quasiuniform jets formed by a de Laval nozzle.

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Development of a low-energy radioactive ion beam facility for the MARA separator

Cited by 9 publications

References 27 publications

Status and development of the MARA low-energy branch

Status and development of the MARA low-energy branch

Radioactive ion beam manipulation at the IGISOL-4 facility

Characterization of Supersonic Gas Jets for High-Resolution Laser Ionization Spectroscopy of Heavy Elements

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