Cryogenic supply for accelerators and experiments at FAIR

Kauschke, M.; Yu, Xiang; Schroeder, C.; Štreicher, B.; Kollmus, H.

doi:10.1063/1.4860842

Cited by 3 publications

(3 citation statements)

References 2 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The heat budget of the accelerator is very low, therefore any heat generation has to be assessed and, if possible, reduced. The cooling power of the cryogenic system of SIS100 will be approximately 34.9 kW at 4 K [4]. It is expected that the major internal source of heat in the accelerator will be AC losses in the superconducting magnets [5].…”

Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Tomków,

Cholewiński,

Ciszek

et al. 2020

View full text Add to dashboard Cite

Sections of the superconducting magnets of the SIS100 particle accelerator, under construction at the Facility for Antiproton and Ion Research (FAIR), the Society for Heavy Ion Research (GSI), Darmstadt, are going to be connected with the by-pass lines. Each line will be used to transfer a two-phase helium flow and an electric current. The electric current will be carried by four pairs of superconducting Nuclotron-type cables. Fast-ramping currents are expected to cause the generation of heat within the cables. In this work the results of a numerical thermal analysis of a bus-bar are presented. The amount of heat transferred from the environment was found based on geometric dimensions of the line and applied insulation. The amount of hysteresis loss, generated in the cable during the operation under most demanding regime of the operation of the accelerator, was calculated. According to the amount of the generated heat, the amount of the hysteresis loss is low in relation to the heat generated in the superconducting magnets. Also it was found that the cable used in the line still retains a large margin of current-carrying capacity.

show abstract

Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Tomków,

Cholewiński,

Ciszek

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Facility for Antiproton and Ion Research, one of the largest modern accelerators, is currently under construction in GSI [3]. The accelerator will consist of 6 cryogenically cooled sections containing superconducting magnets that will be connected with by-pass lines [4].…”

Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Tomków,

Trojanowski,

Ciszek

et al. 2019

View full text Add to dashboard Cite

Quality of electric current delivered to the magnets of a particle accelerator is essential for safety and reliability of its operation. Even small discrepancies strongly affect the properties of particle beams. One of the sources of the disturbances is the appearance of induced currents caused by the electromagnetic interactions between the elements of the machine. In this paper the calculations of induced currents in by-pass lines of a SIS100 particle accelerator are presented. In order to find the values of the currents the self-inductances and mutual inductances of the by-pass lines are found. Due to the complex geometry of the line, especially of Ω-shaped dilatations, the numerical approach was employed. The calculations show that the size of induced currents increases with the distance between the cables in an individual bus-bar. The maximum discrepancy of the magnetic field in a dipole magnet is found to be 7.7 µT. The decrease of distance between the cables allows one to obtain a discrepancy of 1.2 µT.

show abstract

“…For example, the expected heat load of Super-FRS (separating device) is 1770 W at 4 K, including a design factor of 1.5 [6]. Cooling capacity of the entire cryogenic system of accelerator is approximately 34.9 kW at 4 K [7]. Given that, any heat generation that might appear should be assessed, quantified and limited.…”

Section: Introductionmentioning

confidence: 99%

Heat generation by eddy currents in a shell of superconducting bus-bars for SIS100 particle accelerator at FAIR

Trojanowski

Ciszek

Chorowski

2017

Archives of Electrical Engineering

View full text Add to dashboard Cite

Superconducting magnets in the SIS100 particle accelerator require the supply of liquid helium and electric current. Both are transported with by-pass lines designed at Wrocław University of Technology. Bus-bars used to transfer an electric current between the sections of the accelerator will be encased in a steel shell. Eddy currents are expected to appear in the shell during fast-ramp operation of magnets. Heat generation, which should be limited in any cryogenic system, will appear in the shell. In this work the amount of heat generated is assessed depending on the geometry of an assembly of the bus-bars and the shell. Numerical and analytical calculations are described. It was found that heat generation in the shell is relatively small when compared to other sources present in the accelerator and its value strongly depends on the geometry of the shell. The distribution of eddy currents and generated heat for different geometrical options are presented. Based on the results of the calculations the optimal design is proposed.

show abstract

Cryogenic supply for accelerators and experiments at FAIR

Cited by 3 publications

References 2 publications

Archives of Electrical Engineering

Archives of Electrical Engineering

Archives of Electrical Engineering

Heat generation by eddy currents in a shell of superconducting bus-bars for SIS100 particle accelerator at FAIR

Contact Info

Product

Resources

About