High brilliance uranium beams for the GSI FAIR

Barth, W.; Adonin, A.; Düllmann, Ch. E.; Heilmann, Manuel; Hollinger, R.; Jäger, E.; Kester, O.; Khuyagbaatar, J.; Krier, J.; Plechov, Evgenij; Scharrer, Paul; Vinzenz, W.; Vormann, H.; Yakushev, A.; Yaramyshev, Stepan

doi:10.1103/physrevaccelbeams.20.050101

Cited by 33 publications

(17 citation statements)

References 6 publications

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“…One of the crucial quantities to characterize the high-current capability of a synchrotron injector is the horizontal beam emittance at a fixed beam intensity [22][23][24]. Checking FAIR-injector mode capabilities, the transversal beam emittance for high current beam (Bi 28+ ) has been measured recently (see figure 6).…”

Section: Front To End Unilac Heavy Ion Beam Investigationsmentioning

confidence: 99%

LINAC developments for heavy ion operation at GSI and FAIR

Barth¹,

Hollinger²,

Adonin³

et al. 2020

J. Inst.

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The first cavity of a standalone superconducting (sc) continuous wave (cw) heavy ion Linac as a demonstration of the capability of 217 MHz multi gap Crossbar H-mode structures (CH) has been already commissioned at high acceleration gain. The worldwide first beam test with a superconducting multi gap CH-cavity was a milestone of the R&D work of HIM and GSI in collaboration with Goethe University Frankfurt (GUF) in preparation of the sc cw heavy ion Linac project, substituting GSI-UNILAC as a heavy ion high duty factor Linac. Recently the first two of four fully equipped cw-Linac cryomodules are in procurement. To meet the future FAIR science requirements higher beam intensity has to be achieved in the present GSI-accelerator complex. In the last years ion source developments, in particular for the high current Vacuum Arc Ion Sources (VARIS), were concentrated on heavy elements, as Bi and Pb, aiming for stable routine ion source operation at a sufficient rep. rate and high production efficiency. Stripping is a key technology for all heavy ion accelerators. After upgrade of the supersonic N 2 -gas jet implementation of high current foil stripping, recently a new H 2 gas cell, using a pulsed gas regime synchronized with arrival of the beam pulse has been developed. An enhanced stripper gas density as well as a simultaneously reduced gas load results in an increased stripping efficiency, while the beam emittance remains the same. A new record beam intensity (11.1 emA) for 238 U 28+ beams at 1.4 MeV/u has been achieved, applying the pulsed high density H 2 -stripper target to a high intensity 238 U 4+ beam from the VARIS ion source. Further ion source developments have been accomplished recently providing for sufficient heavy ion beam intensities at the High Current Injector Linac. A machine investigation program has been performed in 2020. The focus was to optimize the entire FAIR injector chain for high intensity heavy ion beam after the successful implementation of different upgrade measures. Besides a dedicated operation mode applying UNILAC, as a heavy ion Linac, at a synchronous phase significantly lower than 30 degrees for high intensity proton beam, could be established. Thus, UNILAC is able to deliver a sufficient proton beam intensity for the FAIR commissioning phase, when the FAIR-proton Linac is not yet available.

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Section: Front To End Unilac Heavy Ion Beam Investigationsmentioning

confidence: 99%

LINAC developments for heavy ion operation at GSI and FAIR

Barth¹,

Hollinger²,

Adonin³

et al. 2020

J. Inst.

Self Cite

View full text Add to dashboard Cite

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“…The largest worldwide heavy-ion accelerator facilities providing high-intensity beams tend to use various stripper target materials-most agreeable are gas strippers utilizing gases with low Z-conventional N 2 jet and advanced H 2 pulsed stripping cells are used at GSI UNILAC at 1.4 MeV u −1 (with about 0.4 MPa pressure in the N 2 jet stripper and 12.0 MPa in the pulsed H 2 stripper) [33][34][35], Helium for the first stripper at 11 MeV u −1 at RIBF RIKEN [36,37]. Solid strippers, like carbon foils tested for FRIB in 2011 [38] though not being considered for the operation due to extreme radiation damage deposited by the beam, or rotating beryllium disk as a second stripper at RIKEN [39] are applied as well.…”

Section: Stripper Sectionsmentioning

confidence: 99%

Current progress on ion driver LINAC-100 development for the new rare isotope facility DERICA at JINR

Polozov¹,

Barth²,

Dyubkov³

et al. 2020

Phys. Scr.

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A new ambitious facility DERICA (Dubna Electron—Rare Ion Collider fAcility) was proposed recently in worldwide collaboration. A number of accelerators for various scientific applications will be built for this project and among them a driver-accelerator LINAC-100 capable of accelerating high-intensity beams of primary stable isotopes up to 100 MeV u−1. This paper contains current results on one of the LINAC-100 versions R&D: parameters of the front-end RFQ section, analysis on the stripper sections and optimal stripping energies,the layout of the superconducting part of LINAC-100 and Uranium beam dynamics simulation results.

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“…166 This facility is expected to provide high-intensity beams covering a range of species, including uranium. 167 Nuclear mass measurements at the upgraded facility are planned as part of the NuSTAR project. 168,169 Masses measured at GSI-FAIR will benefit from beam intensities of one to a few orders of magnitude higher than existing GSI intensities.…”

Section: Gsi-fairmentioning

confidence: 99%

Nuclear mass measurements with radioactive ion beams

Famiano

2019

Int. J. Mod. Phys. E

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Received X XXXXX XXXX Revised XX XXXXX XXXX Nuclear masses are the most fundamental of all nuclear properties, yet they can provide a wealth of knowledge, including information on astrophysical sites, constraints on existing theory, and fundamental symmetries. In nearly all applications, it is necessary to measure nuclear masses with very high precision. As mass measurements push to more short-lived and more massive nuclei, the practical constraints on mass measurement techniques become more exacting. Various techniques used to measure nuclear masses, including their advantages and disadvantages are described. Descriptions of some of the world facilities at which the nuclear mass measurements are performed are given, and brief summaries of planned facilities are presented. Future directions are mentioned, and conclusions are presented which provide a possible outlook and emphasis on upcoming plans for nuclear mass measurements at existing facilities, those under construction, and those being planned.

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High brilliance uranium beams for the GSI FAIR

Cited by 33 publications

References 6 publications

LINAC developments for heavy ion operation at GSI and FAIR

LINAC developments for heavy ion operation at GSI and FAIR

Current progress on ion driver LINAC-100 development for the new rare isotope facility DERICA at JINR

Nuclear mass measurements with radioactive ion beams

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