Status of vacuum arc ion source development for injection of high current uranium ion beams into the GSI accelerator facility

Hollinger, R.; Galonska, M.

doi:10.1016/j.nimb.2005.04.062

Cited by 11 publications

(6 citation statements)

References 14 publications

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“…This is an important step paving the way to fulfill the FAIR heavy ion high intensity beam requirements. The U 4+ -beam current and brilliance was improved by applying a 7 hole-aperture extraction system at the VARIS ion source [19]. By optimization of the low energy beam transport and improved RFQ matching an RFQ transmission of 75% (11.3 emA) was achieved.…”

Section: Status Of the Unilac High Current Performancementioning

confidence: 99%

A superconducting CW-LINAC for heavy ion acceleration at GSI

et al. 2017

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Abstract.Recently the Universal Linear Accelerator (UNILAC) serves as a powerful high duty factor (25%) heavy ion beam accelerator for the ambitious experiment program at GSI. Beam time availability for SHE (Super Heavy Element)-research will be decreased due to the limitation of the UNILAC providing Uranium beams with an extremely high peak current for FAIR simultaneously. To keep the GSI-SHE program competitive on a high level and even beyond, a standalone superconducting continuous wave (100% duty factor) LINAC in combination with the upgraded GSI High Charge State injector is envisaged. In preparation for this, the first LINAC section (financed by HIM and GSI) will be tested with beam in 2017, demonstrating the future experimental capabilities. Further on the construction of an extended cryo module comprising two shorter Crossbar-H cavities is foreseen to test until end of 2017. As a final R&D step towards an entire LINAC three advanced cryo modules, each comprising two CH cavities, should be built until 2019, serving for first user experiments at the Coulomb barrier.

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Section: Status Of the Unilac High Current Performancementioning

confidence: 99%

A superconducting CW-LINAC for heavy ion acceleration at GSI

et al. 2017

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“…The U 4þ -beam current and brilliance was improved by applying a multiaperture extraction system [6] at the VARIS ion source [2]. VARIS is a new generation of vacuum arctype ion source.…”

Section: U-beam Optimization At Hsimentioning

confidence: 99%

“…For uranium measurements at UNILAC, a novel multihole extraction system for extracting a high brilliant ion beam from the VARIS ion source [2] was used. Moreover, the HSI radio frequency quadrupole (RFQ) was operated at nominal rf voltage (for uranium operation) by applying a dedicated conditioning and development program.…”

Section: Introductionmentioning

confidence: 99%

High brilliance uranium beams for the GSI FAIR

Barth

Adonin

Düllmann

et al. 2017

Phys. Rev. Accel. Beams

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The 40 years old GSI-UNILAC (Universal Linear Accelerator) as well as the heavy ion synchrotron SIS18 will serve as a high current heavy ion injector for the new FAIR (Facility for Antiproton and Ion Research) synchrotron SIS100. In the context of an advanced machine investigation program in combination with the ongoing UNILAC upgrade program, a new uranium beam intensity record (11.5 emA, U 29þ) at very high beam brilliance was achieved recently in a machine experiment campaign. This is an important step paving the way to fulfill the FAIR heavy ion high intensity beam requirements. Results of high current uranium beam measurements applying a newly developed pulsed hydrogen gas stripper (at 1.4 MeV=u) will be presented in detail.

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“…A newly developed multiaperture beam extraction system was installed. The VARIS ion source [27,28], the extraction system, the postacceleration gap, the low energy beam transport (LEBT) system and the matching line to the RFQ were optimized using a 25% higher U 4þ beam current extracted from the ion source. As shown in Fig.…”

Section: High Current Uranium Beam Optimizationmentioning

confidence: 99%

U28+-intensity record applying aH2
Barth
¹
,
Adonin
²
,
Düllmann
³

et al. 2015
Phys. Rev. ST Accel. Beams
36
0
6
0
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To meet the Facility for Antiproton and Ion Research science requirements higher beam intensity has to be achieved in the present GSI-accelerator complex. For this an advanced upgrade program for the UNILAC is ongoing. Stripping is a key technology for all heavy ion accelerators. For this an extensive research and development program was carried out to optimize for high brilliance heavy ion operation. After upgrade of the supersonic N 2 -gas jet (2007), implementation of high current foil stripping (2011) and preliminary investigation of H 2 -gas jet operation (2012), recently (2014) a new H 2 -gas cell using a pulsed gas regime synchronized with arrival of the beam pulse has been developed. An obviously enhanced stripper gas density as well as a simultaneously reduced gas load for the pumping system result in an increased stripping efficiency, while the beam emittance remains the same. A new record intensity (7.8 emA) for 238 U 28þ beams at 1.4 MeV=u has been achieved applying the pulsed high density H 2 stripper target to a high intensity 238 U 4þ beam from the VARIS ion source with a newly developed extraction system. The experimental results are presented in detail.

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Status of vacuum arc ion source development for injection of high current uranium ion beams into the GSI accelerator facility

Cited by 11 publications

References 14 publications

A superconducting CW-LINAC for heavy ion acceleration at GSI

A superconducting CW-LINAC for heavy ion acceleration at GSI

High brilliance uranium beams for the GSI FAIR

U28+-intensity record applying aH2
Barth
¹
,
Adonin
²
,
Düllmann
³

et al. 2015
Phys. Rev. ST Accel. Beams
36
0
6
0
View full text Add to dashboard Cite

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Status of vacuum arc ion source development for injection of high current uranium ion beams into the GSI accelerator facility

Cited by 11 publications

References 14 publications

A superconducting CW-LINAC for heavy ion acceleration at GSI

A superconducting CW-LINAC for heavy ion acceleration at GSI

High brilliance uranium beams for the GSI FAIR

U28+-intensity record applying aH2Barth1, Adonin2, Düllmann3 et al. 2015Phys. Rev. ST Accel. Beams36060View full textAdd to dashboardCite

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U28+-intensity record applying aH2
Barth
¹
,
Adonin
²
,
Düllmann
³

et al. 2015
Phys. Rev. ST Accel. Beams
36
0
6
0
View full text Add to dashboard Cite