Applications of the pulsed gas stripper technique at the GSI UNILAC

Scharrer, Paul; Barth, W.; Bevcic, Mario; Düllmann, Ch. E.; Gerhard, Peter; Groening, L.; Horn, Klaus-Peter; Jäger, E.; Khuyagbaatar, J.; Krier, J.; Vormann, H.; Yakushev, A.

doi:10.1016/j.nima.2017.05.015

“…It could be assumed that the drain-off time of the pulsed gas target does not change when the beam pulse length and, thereby, the valve-opening time is increased. At least the estimated drain-off time is still significantly lower than the minimum time between two beam pulses [7].…”

Section: High Current U-strippingmentioning

confidence: 82%

High brilliance uranium beams for the GSI FAIR

Barth

¹

,

Adonin

²

,

Düllmann

³

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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“…In this article, we propose a simple method to considerably improve the performance of the gas stripper setup at the GSI Universal Linear Accelerator (UNILAC) in Germany. A detailed description of the design and operation of the GSI gas stripper reader can be found elsewhere, for example, in [4][5][6][7][8][9][10][11][12][13][14], as well as links between them. Therefore, in this article, we provide only a short description.…”

Section: Introductionmentioning

confidence: 99%

“…Figure13. The result of the calculation of the pulsed hydrogen target thickness for the gap between the nozzle exit and the gas catcher tube entrance of 30 mm.…”

mentioning

confidence: 99%

How Simply One Can Considerably Improve Performance of the Gas Stripper at the GSI UNILAC (Proposal)

Varentsov

2024

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0

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Here we propose a simple way in which one can considerably improve performance of the gas stripper setup at the GSI UNILAC. To do so, it will be enough to replace inside the main GSI stripper chamber the present nozzle and the short windowless storage gas cell (for pulsed gas-jet operation mode) by a simple conical diverging nozzle combined with a gas catcher tube placed on the axis of gas-jet at some distance downstream the nozzle exit. As a result, the background pressure in the main and differentially pumped adjacent vacuum chambers of the gas stripper at the GSI UNILAC will dramatically reduce, and it will make possible to achieve the required optimal thickness of gas targets. The pulsed gas stripper operation is simply realized by implementing a commercially available fast gas valve connected to the nozzle entrance. Moreover, the ion beam pulses repetition rate can be increased and it will allow for the considerably higher average intensity of the ion beams extracted from the GSI UNILAC. Performance of the proposed GSI UNILAC gas stripper modification we explored by means of detailed computer experiments, which give a realistic description of supersonic gas jets flowing out the nozzle into vacuum. Results of these computer experiments have presented and discussed.

show abstract

“…In this article, we propose a simple way in which one can considerably improve performance of the gas stripper setup at the GSI UNILAC. The detailed description of the design and operation of the GSI gas stripper reader can find elsewhere, for example, in [4][5][6][7][8][9][10][11][12][13][14] and links within them. That is why we give here only its short description.…”

Section: Introductionmentioning

confidence: 99%

How Simply One Can Considerably Improve Performance of the Gas Stripper at the GSI UNILAC (Proposal)

Varentsov

2024

Preprint

0

View full text Add to dashboard Cite

Here we propose a simple way in which one can considerably improve performance of the gas stripper setup at the GSI UNILAC. To do so, it will be enough to replace inside the main GSI stripper chamber the present nozzle and the short windowless storage gas cell (for pulsed gas-jet operation mode) by a simple conical diverging nozzle combined with a gas catcher tube placed on the axis of gas-jet at some distance downstream the nozzle exit. As a result, the background pressure in the main and differentially pumped adjacent vacuum chambers of the gas stripper at the GSI UNILAC will dramatically reduce, and it will make possible to achieve the required optimal thickness of gas targets. The pulsed gas stripper operation is simply realized by implementing a commercially available fast gas valve connected to the nozzle entrance. Moreover, the ion beam pulses repetition rate can be increased and it will allow for the considerably higher average intensity of the ion beams extracted from the GSI UNILAC. Performance of the proposed GSI UNILAC gas stripper modification we explored by means of detailed computer experiments, which give a realistic description of supersonic gas jets flowing out the nozzle into vacuum. Results of these computer experiments have presented and discussed.

show abstract

Applications of the pulsed gas stripper technique at the GSI UNILAC

Cited by 8 publications

References 13 publications

High brilliance uranium beams for the GSI FAIR

High brilliance uranium beams for the GSI FAIR

How Simply One Can Considerably Improve Performance of the Gas Stripper at the GSI UNILAC (Proposal)

How Simply One Can Considerably Improve Performance of the Gas Stripper at the GSI UNILAC (Proposal)

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