Nb3Sn Accelerator Dipole Magnet Needs for a Future Circular Collider

Tommasini, D.

doi:10.1007/978-3-030-16118-7_16

Cited by 3 publications

(4 citation statements)

References 28 publications

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“…where ∫ 𝐵 (𝑛) In order to achieve these field components in BR dipoles, Equation (3.1) is used for finding pole-tip points in which h is the half gap height [22][23][24]:…”

Section: Booster Ring Magnetsmentioning

confidence: 99%

“…The first circuit is directly connected to the BR magnets and carries away their waste heat using de-ionized water. The second circuit uses chilled water in a heat exchanger to cool down the de-ionized water [16,23,24]. Table 5 gives the electrical and the cooling parameters of the ILSF BR dipoles in the extraction energy (3 GeV).…”

Section: Electrical and Cooling Calculationsmentioning

confidence: 99%

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Design of low emittance booster ring magnets for Iranian Light Source Facility[This paper is supported by Iranian Light Source Facility.]

Saeidi¹,

Yousefnejad²,

Hashemi³

2021

J. Inst.

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Iranian Light Source Facility (ILSF) is a 3 GeV synchrotron radiation laboratory in the detailed design stage. The main building site is being excavated in Qazvin, 150 km from Tehran. The Booster ring of this facility with a circumference of 504 m and a low emittance of 3.5 nm rad accelerates electrons from 150 MeV to 3 GeV. Using POISSON and OPERA codes, we designed the ILSF booster ring magnets including dipoles, quadrupoles, sextupoles, and separate correctors. Cooling and electrical calculations are done, and ramping effects are considered. The ILSF has also been attempting to practice mechanical designs and to build prototype magnets at this stage too.

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“…where ∫ 𝐵 (𝑛) In order to achieve these field components in BR dipoles, Equation (3.1) is used for finding pole-tip points in which h is the half gap height [22][23][24]:…”

Section: Booster Ring Magnetsmentioning

confidence: 99%

Section: Electrical and Cooling Calculationsmentioning

confidence: 99%

Design of low emittance booster ring magnets for Iranian Light Source Facility[This paper is supported by Iranian Light Source Facility.]

Saeidi¹,

Yousefnejad²,

Hashemi³

2021

J. Inst.

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show abstract

“…The considered strands are assumed to have a copper-to-noncopper ratio of 1.0 and a non-copper critical current density (j nc,c ) following the scaling law specified in [9] and quoted in Eq. ( 1):…”

Section: Cable Designmentioning

confidence: 99%

“…The mechanical behavior of the magnet assembly has been studied in 2D and 3D using FEMs in ANSYS [11]. The assumed material properties are those specified for the mechanical design of the FCC dipole magnets [6], [9]. The simulations include three loading steps: 1) assembly at room temperature where minimal preload is applied, 2) cool-down to 4.2 K, and 3) powering at the nominal field, which includes the effect of the Lorentz forces in the coils and the reluctance forces in the iron parts.…”

Section: Mechanical Analysismentioning

confidence: 99%

Progress on the Upgrade of EDIPO, a 15 T Large Aperture Dipole

Araujo

Ballarino

Bordini

et al. 2021

IEEE Trans. Appl. Supercond.

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EDIPO 2 (the upgraded EDIPO test facility) will provide a unique testbed for superconducting cables for fusion magnets, accelerators, and other applications. Compared to the previous magnet assembly, the magnetic field is enhanced from 12.35 T to 15 T, the aperture is enlarged from 90×141 mm 2 to 144×144 mm 2 and the uniform field length is increased from 680 mm to 1000 mm (assuming a 1% drop of the field along the sample axis). A number of magnet designs have been proposed for EDIPO 2 since the conceptual design activities started in 2017. The design iterations have converged into a flared-end block-coil dipole design with a purely rectangular cross-section (coil windings aligned on the high and the low-field side). The use of a two-stage cable design is considered in order to increase the operating current, reduce the coil inductance and consequently limit the discharge voltage. The magnet structural design keeps the pre-compression applied to the coil winding pack to a minimum and allows a gap to open between the coils and the test well during operation. Progress on the magnet design activities is reported, including the results of magnetic and mechanical analyses, as well as quench protection studies. The procurement of the helium vessel required to contain the liquid helium bath for magnet cooling is also discussed. 

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High-field superconductivity in C-doped MgB2 bulk samples prepared by a rapid synthesis route

Matera

Bonura

Černý

et al. 2020

Sci Rep

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The upper critical field sets the thermodynamic limit to superconductivity. A big gap is present between the upper-critical-field values measured in MgB2 polycrystalline bulk superconductors and those of thin films, where values as high as ~ 50 T have been achieved at 4.2 K. Filling this gap would unlock the potential of MgB2 for magnet applications. This work presents the results of an extensive experimental campaign on MgB2 bulk samples, which has been guided by a Design of Experiment. We modeled the dependence of the upper critical field on the main synthesis parameters and established a new record (~ 35 T at 4.2 K) preparing C-doped bulk samples by a non-conventional rapid-synthesis route. This value appears to be an upper boundary for the upper critical field in bulk samples. Structural disorder in films seems to act selectively on one of the two bands where superconductivity in MgB2 takes place: this enhances the upper critical field while reducing the critical temperature only by few Kelvins. On the other hand, the critical temperature in bulk samples decreases monotonically when structural disorder increases, and this imposes a limit to the maximum achievable upper critical field.

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Nb3Sn Accelerator Dipole Magnet Needs for a Future Circular Collider

Cited by 3 publications

References 28 publications

Design of low emittance booster ring magnets for Iranian Light Source Facility[This paper is supported by Iranian Light Source Facility.]

Design of low emittance booster ring magnets for Iranian Light Source Facility[This paper is supported by Iranian Light Source Facility.]

Progress on the Upgrade of EDIPO, a 15 T Large Aperture Dipole

High-field superconductivity in C-doped MgB2 bulk samples prepared by a rapid synthesis route

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