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Coils

Properties of the coils :

Different kind of coils are produced and used at the LNCMI.

- Monolithic coils up to 80 T :

Reinforced wire coilsInner reinforced coils
13 mm (77 K); 7 mm (1.5 K); 4 mm (300 mK) 13 or 28 mm (77 K); 7 or 19 mm (1.5 K); 4 mm (300 mK) or 9 mm (50 mK)

- Multi-coils (nested) up to 98.8T :

These magnets contains two concentric coils up to 90 T and three coils above 90 T.

80 T90 T>90 T
(12 MJ+1 MJ) (12 MJ +1 MJ) (14 MJ+6 MJ+1 MJ)
13 mm@77 K ; 7 mm@1.5 K ; 4 mm@300 mK 8 mm@77 K ; 4 mm@1.5 K ; 4 mm@500 mK 8 mm@77 K; 4 mm@1.5 K

Coil summary :

Energy (MJ) [number of coils]B user (T)Bore diameter 77 K [at 1.5 K] (mm)Pulse duration [rise time;FWHM] (ms)Time between two pulses (hour)
1.25 [1] 60 13 [7] 150 [25;45] 1.5
5 [4] 60 28 [19] 300 [55;87] 1.25
6 [2] 70 13 [7] 200 [32;55] 1
12 (Outer 34T) 1 (Inner 46T) [1] 80 13 [7] 1200 [90] 40 [16] 1.5
12 (Outer 34T) 1 (Inner 56T) [1] 90 8 [4] 1200 [90] 40 [16] 1.5
14 (Outer 11T) 6 (Middle 29T) 1 (Inner 60T) [1] 95 8 [4] 1200 [90] 70 [30] 25 [10] 2

Coils for mobile banks (ESRF, ILL, LULI, LLNL) : (Set-up for large scale facilities)

200 kJ Wide opening coil 30 T 20 mm ; +/- 40° open angle 60 ms [4 ms] 0.125 hr
1 MJ Split coil 30 T 22 mm ; mid-plane opening 22 mm [0-180°] +/- 2.5° 60 ms [16 ms] 0.5 hr
1MJ Wide opening coil 40T 20mm ; +/- 60° open angle 100ms [50ms] 0.08 hr
30 kJ Split coil 40 T 6 mm ; mid-plane opening 6 mm 320 µs [160 µs] 0.25 hr
30 kJ Split coil 20 T 15 mm ; mid-plane conical opening 20° 320 µs [160 µs] 0.25 hr
30 kJ Split coil 30 T 10 mm ; mid-plane opening 10 mm 320 µs [160 µs] 0.25 hr

Pulse shapes :

Selected publications :

A novel platform to study magnetized high-velocity collisionless shocks D.P. Higginson, Ph Korneev, J. Béard et al. High Energy Density Physics (2014)

A 31T split-pair pulsed magnet for single crystal X-ray diffraction at low temperature F. Duc et al. Rev. Sci. Instrum. 85, 053905 (2014)

Production of large volume, strongly magnetized laser-produced plasmas by use of pulsed external magnetic fields B. Albertazzi, J. Béard, A. Ciardi et al. Rev. Sci. Instrum. 84, 043505 (2013).

Special Coils Development at the National High Magnetic Field Laboratory in Toulouse J. Béard, J. Billette, P. Frings, et al. J. Low Temp. Phys. 170, 5-6, 442-446 (2013)

The French High Magnetic Field Facility J. Béard, F. Debray, J. Low Temp. Phys. 170, 5-6, 541-552 (2013) High-frequency magnetic oscillations of the organic metal theta-(ET)(4)ZnBr4(C6H4Cl2) in pulsed magnetic field of up to 81 T J. Béard, et al. EPJ-AP 59, 3, 30201 (2012)

Copper/Stainless Steel Polyhelix Magnets F. Lecouturier, J. Billette, J. Béard, et al. IEEE Trans. Applied Superconductivity 22, 3, 4300404 (2012)

Optimization of Large Multiple Coil Systems for Pulsed Magnets J. A. A. J. Perenboom, P. Frings, J. Béard, et al. J. Low Temp. Phys. 159, 1-2, 336-340 (2010)

New developments at the national pulsed field laboratory in Toulouse P. Frings, J. Billette, J. Béard et al. IEEE Trans. Applied Superconductivity 18, 2, 592-595 (2008)

Rapid cooling methods for pulsed magnets P. Frings, H. Witte, H. Jones et al. IEEE Trans. Applied Superconductivity 18, 2, 612-615 (2008)

Group members : Jérôme Béard, Julien Billette