A superconducting CW-LINAC for heavy ion acceleration at GSI

Barth, W.; Aulenbacher, K.; Basten, Markus; Dziuba, Florian; Gettmann, Viktor; Miski-Oglu, Maksym; Podlech, Holger; Yaramyshev, Stepan

doi:10.1051/epjconf/201713801026

Cited by 37 publications

(11 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently the possibility for acceleration of protons as well as uranium ion beams is under investigation [46]. A higher acceleration gradient for the first sc cw-CH cavity was confirmed in the presented experiments and has to be taken into account for further studies [47,48]. Therefore the original linac layout has to be revised by decreasing the number of gaps per cavity, preserving the total cavity voltage and high accelerating gradient.…”

Section: Discussionmentioning

confidence: 91%

First heavy ion beam tests with a superconducting multigap CH cavity

Barth¹,

Aulenbacher

Basten

et al. 2018

Phys. Rev. Accel. Beams

View full text Add to dashboard Cite

Very compact accelerating-focusing structures, as well as short focusing periods, high accelerating gradients and short drift spaces are strongly required for superconducting (sc) accelerator sections operating at low and medium energies for continuous wave (cw) heavy ion beams. To keep the GSI-super heavy element (SHE) program competitive on a high level and even beyond, a standalone sc cw linac (Helmholtz linear accelerator) in combination with the GSI high charge state injector (HLI), upgraded for cw operation, is envisaged. Recently the first linac section (financed by Helmholtz Institute Mainz (HIM) and GSI) as a demonstration of the capability of 217 MHz multigap crossbar H-mode structures (CH) has been commissioned and extensively tested with heavy ion beam from the HLI. The demonstrator setup reached acceleration of heavy ions up to the design beam energy. The required acceleration gain was achieved with heavy ion beams even above the design mass to charge ratio at high beam intensity and full beam transmission. This paper presents systematic beam measurements with varying rf amplitudes and phases of the CH cavity, as well as phase space measurements for heavy ion beams with different mass to charge ratio. The worldwide first and successful beam test with a superconducting multigap CH cavity is a milestone of the R&D work of HIM and GSI in collaboration with IAP in preparation of the HELIAC project and other cw-ion beam applications.

show abstract

Section: Discussionmentioning

confidence: 91%

First heavy ion beam tests with a superconducting multigap CH cavity

Barth¹,

Aulenbacher

Basten

et al. 2018

Phys. Rev. Accel. Beams

View full text Add to dashboard Cite

show abstract

“…particles per second [265,266,267]. In combination with improved targets that can handle the high beam intensity and optimized recoil separators this may result in ten times higher yields than available today.…”

Section: Perspectivesmentioning

confidence: 99%

Recent progress in laser spectroscopy of the actinides

Block,

Laatiaoui,

Raeder

2020

Preprint

View full text Add to dashboard Cite

The interest to perform laser spectroscopy in the heaviest elements arises from the strong impact of relativistic effects, electron correlations and quantum electrodynamics on their atomic structure. Once this atomic structure is well understood, laser spectroscopy also provides access to nuclear properties such as spins, mean square charge radii and electromagnetic moments in a nuclear-model independent way. This is of particular interest for the heaviest actinides around N = 152, a region of shell-stabilized deformed nuclei. The experimental progress of laser spectroscopy in this region benefitted from continuous methodological and technical developments such as the introduction of buffer-gas-stopping techniques that enabled the access to ever more exotic nuclei far-off stability. The key challenges faced in this endeavor are small yields, nuclides with rather short half-lives and the need to search for atomic transitions in a wide spectral range guided by theoretical predictions. This paper describes the basics of the most common experimental methods and discusses selected recent results on the atomic and nuclear properties of the actinides up to nobelium where pioneering experiments were performed at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany.

show abstract

“…Details on the cw linac demonstrator as well as a possible layout of the full machine are given in [40]. Next steps, which have started, include the installation of a string of cavities.…”

Section: Randd Activities Towards a New Cw Linacmentioning

confidence: 99%

“…. Superconducting cw linac demonstrator comprising a CH cavity embedded by two sc solenoids on a support frame (taken from [40]). …”

Section: Randd Activities Towards a New Cw Linacmentioning

confidence: 99%

How elements up to 118 were reached and how to go beyond

Düllmann

2017

EPJ Web Conf.

View full text Add to dashboard Cite

Abstract. The new superheavy elements with Z=113, 115, 117, and 118 were recently accepted into the periodic table and have been named. Elements with Z≥112 are predominantly produced in 48 Ca-induced fusion reactions on actinide targets. This pathway is exhausted at Z=118 due to the lack of target materials with sufficiently high proton number to reach elements with Z≥119. Search experiments for yet heavier elements were performed at GSI Darmstadt and FLNR Dubna. Cf, leading to Z=120, have been studied. Despite a total duration of these experiments of more than one year, neither succeeded in the identification of a new element.

show abstract

A superconducting CW-LINAC for heavy ion acceleration at GSI

Cited by 37 publications

References 13 publications

First heavy ion beam tests with a superconducting multigap CH cavity

First heavy ion beam tests with a superconducting multigap CH cavity

Recent progress in laser spectroscopy of the actinides

How elements up to 118 were reached and how to go beyond

Contact Info

Product

Resources

About