Heavy Ion High Intensity Upgrade of the GSI UNILAC

Barth, W.; Dahl, L.; Galonska, M.; Glatz, J.; Groening, L.; Hollinger, R.; Richter, Silke; Yaramyshev, Stepan

doi:10.1063/1.1949504

Cited by 3 publications

(4 citation statements)

References 4 publications

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“…GSI accelerators, the heavy ion linac UNILAC [6] and the heavy ion synchrotron SIS18 [7], after a range of upgrades, will serve as injectors and boosters for SIS100. The fast-ramping SIS100 synchrotron is the centrepiece of FAIR and will provide intense primary beams for two production targets to generate new exotic nuclei and antiproton beams [8].…”

Section: Jinst 15 C10001mentioning

confidence: 99%

FAIR status and the PANDA experiment

Belias¹

2020

J. Inst.

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The international accelerator Facility for Antiproton and Ion Research in Europe (FAIR) is the next generation accelerator complex for fundamental and applied research with antiproton and ion beams. FAIR will provide worldwide unique facilities enabling a wide spectrum of unprecedented forefront research in hadron and nuclear physics, in atomic physics and nuclear astrophysics as well as in applied sciences like materials research, plasma physics and radiation biophysics. Key features of FAIR are intense beams of antiprotons and ions up to the heaviest and even exotic nuclei covering an energy range from rest up to 30 GeV/u. We present a brief overview on the current construction status of the FAIR accelerator facilities and the associated research pillars with emphasis on PANDA . PANDA (antiProton Annihilation in Darmstadt), is the central experiment to fully exploit the physics research potential of the High Energy Storage Ring (HESR) with intense, phase-space cooled, antiprotons up to 15 GeV/c impinging on a variety of fixed targets. The PANDA detector features two spectrometers, the Target Spectrometer with a SC solenoid magnet of 2 T and the Forward Spectrometer with a 2 Tm dipole magnet. In both spectrometers the PANDA collaboration employs a multitude of modern detector technologies to provide tracking, particle identification, calorimetry and muon identification, arranged hermetically close to 4π around the interaction region with additional detectors for coverage of the forward boosted particles. Focusing on the various PANDA detector systems we present an overview of recent developments, the detector construction progress and conclude with an outline for a phased deployment of PANDA at FAIR.

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Section: Jinst 15 C10001mentioning

confidence: 99%

FAIR status and the PANDA experiment

Belias¹

2020

J. Inst.

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“…An advanced upgrade program for the UNILAC aimed to meet the FAIR requirements. For uranium (FAIR reference ion) the UNILAC has to deliver 3.3 • 10 11 U 28+ -particles per 100 μs (see table 1) [2]. In the High Current Injector (HSI) [3] comprising an IH-RFQ and an IH-DTL, the beam is accelerated up to 1.4 MeV/u.…”

Section: Overview -Injector Linacs For Fair and The Unilac-user Programmentioning

confidence: 99%

“…The primary proton beam has to be provided by a 70 MeV proton linac followed by two synchrotrons. The new FAIR proton linac [2] will deliver a pulsed proton beam of up to 35 mA of 36 μs duration at a repetition rate of 4 Hz. In general the UNILAC as a heavy ion accelerator is able to deliver world record uranium beam intensities for injection into the synchrotrons.…”

Section: Proton Beam Operation At the Heavy Ion Unilacmentioning

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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“…This device had already been designed and is ready for order. An upgrade program for additional non-destructive beam diagnostics, sufficient for high current operation, is still in progress [5].…”

Section: Further Upgrade Programmentioning

confidence: 99%