Electron stripping of Bi ions using a modified 1.4 MeV/u gas stripper with pulsed gas injection

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

doi:10.1007/s10967-015-4036-2

Cited by 16 publications

(29 citation statements)

References 2 publications

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“…As shown in [17] the measured relative charge state spectrum for jet operation as well as for pulsed gas cell with Bi beam from the HSI remains the same inside the error limits, if the applied pressure inside gas jet and gas cell is high enough to reach the maximum equilibrium charge state. A comparable absolute spectrum could be potentially reached, when the beam is matched to gas jet-/gas cellstripper target and adjacent charge separating system.…”

Section: High Intensity Beam Experiments With a Pulsed Gas Strippermentioning

confidence: 52%

“…Accordingly, a pulsed gas injection [17] was implemented instead of a continuous gas inlet as in the existing setup. This allows an increase of the maximum gas pressure.…”

Section: Stripping Of Heavy Ionsmentioning

confidence: 99%

“…The gas injection is stopped at the end of the beam pulse. This associated decrease of the total gas volume allowed an increase of the gas pressure inside the gas pulse and therefore a maximum stripper target density [17].…”

Section: Stripping Of Heavy Ionsmentioning

confidence: 99%

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

et al. 2015
Phys. Rev. ST Accel. Beams
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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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Section: High Intensity Beam Experiments With a Pulsed Gas Strippermentioning

confidence: 52%

“…Accordingly, a pulsed gas injection [17] was implemented instead of a continuous gas inlet as in the existing setup. This allows an increase of the maximum gas pressure.…”

Section: Stripping Of Heavy Ionsmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2015
Phys. Rev. ST Accel. Beams
Self Cite
36
0
6
0
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show abstract

“…A separate gas supply for each valve enables for high flexibility in beam operation at the UNILAC [24]. The gassupply system before the stripper can be evacuated by a piston pump.…”

Section: A Gas Strippermentioning

confidence: 99%

“…The previously existing gas stripper is based on a continuous N 2 gas-jet. In the new setup, this was replaced by a pulsed gas stripper cell, exploiting the low duty cycle operation of FAIR (≤200 μs-long beam pulses, ≤3 Hz repetition rate) [12]. The gas injection is synchronized with the pulsed timing of the accelerator.…”

Section: Introductionmentioning

confidence: 99%

Measurements of charge state distributions of 0.74 and 1.4 MeV/u heavy ions passing through dilute gases

Scharrer

Düllmann

Barth

et al. 2017

Phys. Rev. Accel. Beams

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In many modern heavy-ion accelerator facilities, gas strippers are used to increase the projectile charge state for improving the acceleration efficiency of ion beams to higher energies. For this application, the knowledge on the behavior of charge state distributions of heavy-ions after passing through dilute gases is of special interest. Bi on H 2 and He gas, which are highly beneficial, e.g., for the production of beams of high intensities in accelerators.

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Applications of the pulsed gas stripper technique at the GSI UNILAC

Scharrer

Barth

Bevcic

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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Electron stripping of Bi ions using a modified 1.4 MeV/u gas stripper with pulsed gas injection

Cited by 16 publications

References 2 publications

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

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

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

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

Measurements of charge state distributions of 0.74 and 1.4 MeV/u heavy ions passing through dilute gases

Applications of the pulsed gas stripper technique at the GSI UNILAC

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Electron stripping of Bi ions using a modified 1.4 MeV/u gas stripper with pulsed gas injection

Cited by 16 publications

References 2 publications

U28+-intensity record applying aH2Barth1, Adonin2, Düllmann3 et al. 2015Phys. Rev. ST Accel. BeamsSelf Cite36060View full textAdd to dashboardCite

U28+-intensity record applying aH2Barth1, Adonin2, Düllmann3 et al. 2015Phys. Rev. ST Accel. BeamsSelf Cite36060View full textAdd to dashboardCite

Measurements of charge state distributions of 0.74 and 1.4 MeV/u heavy ions passing through dilute gases

Applications of the pulsed gas stripper technique at the GSI UNILAC

Contact Info

Product

Resources

About

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

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

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

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