High Magnetic Field Facility for Neutron Scattering
Transcript of High Magnetic Field Facility for Neutron Scattering
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
MT-24 Seoul 21. Oct. 2015
High Magnetic Field Facility for Neutron Scattering Project HFM-EXED
NHMFL: M. Bird, I. Dixon, J. Toth, S. Bole, S. Hannahs, J. Kynoch, H. Bai, S. Marshall, T. Adkins, G. Boebinger J. Miller, A. Bonito-Oliva EPFL-CRPP: P. Bruzzone, R. Wesche HZB: P. Smeibidl, A. Daske, H. Ehmler, C. Fritsche, J. Heinrich, M. Hoffmann, S. Kempfer, R. Wahle
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
What is Helmholtz? What is HZB?
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
What is Helmholtz? What is HZB?
HZB Campus Wannsee
HZB Campus Adlershof
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Investigation of Structure and Dynamics of Complex Materials and Material Systems with Neutrons
Atoms within crystal
Unit cell
d Neutron scatters at the lattice
Neutron reflection
Beugungswinkel
Detector area
Diffraction picture
Atom
Nuclei Magnetism
Neutrons
Scattering Angle
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Unconventional Superconductors
Understanding the interplay between superconductivity and other competing orders
B/T phase diagram of underdoped YBCO Le Boeuf et. al., Nature Physics 9 (2013) 79
§ Identification of different vortex phases (lattice, liquid, disentangled, entangled, decoupled) § Method: diffraction / inelastic scattering / SANS
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Magnet Systems for n-Scattering at HZB
Continuous Field max. ~ 15 T – split pair configuration
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Present Cryomagnets for n-Scattering Experiments
Limitations
SANS
SC-Magnet
Vertical Field Horizontal Field
Sample Sample chamber
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Monochromatic Broad Wavelength Band of Neutrons
Triple-Axis Instrument TOF-Instrument
Split-Coil-Magnet Tapered Solenoid (vertical field) (horizontal field)
High Field Magnets for Neutron Science
Magnetic Structures Single Crystal Measurements Inelastic Measurements
Powder Diffraction Single Crystal Measurements (restrictions!) SANS with B||ki Inelastic Measurements (flux reduction!)
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Neutron Guide Hall-I
Neutron Guide Hall-II Cold Source
Exp-Hall
Neutron-Guide-Hall-2 with Multi-Spectral Guide
Cold Neutrons
Neutron Guide (Ni coated)
Super Mirror
Thermal Neutrons
Thermal Neutron Beam
Cold Neutron Beam
0 2 4 6 8 10 12 14 16
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1x107
2x107
3x107
thermal cold mixed
Flux
(n /
s cm
2 A)
Wavelength (A)9
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
• Resistive Magnet or
• Superconducting Magnet or
• Series-Connected-Hybrid Magnet (SCH)
Hybrid data: Max. Field:
> 25 Tesla (4 MW) > 30 Tesla (8 MW)
(conical opening: 30°) 6 Disc Choppers
Fermi Chopper
TOF instrumentation with multispectral neutron guide and horizontal magnet to allow optimum magnet design
Project Preparation Phase
Multi Purpose Instrument:
Diffraction Small Angle Neutron Scattering Spectroscopy
Magnet
Detector Chamber 10
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
=30°
25 T – 31 T Hybrid Magnet (Solenoid) Geometry and power of resistive coil determine
maximum field
Magnets for n-Scattering Experiments
Future
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Plot maintained by Peter Lee at: http://magnet.fsu.edu/~lee/plot/plot.htm
Why not a Superconducting Magnet ?
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Central Field > 25 T (> 30) T
Bore 50 mm horizontal
Opening Angle 30°
Power Resistive Insert 4 MW (8 MW)
Field Homogeneity < 0.5% (15 mm x 15 mm Vol.)
Operating Current 20 kA
Magnetic Field of Resistive Insert
13 T – 18 T (4 MW / 8 MW)
Magnetic Field of Supercond. Coil
13 T
Height ~ 5 m
Total Weight ~ 25 t
Cold Mass ~ 6 t
Design Parameter Hybrid Magnet
CICC Coil
Sample
Resistive Coils
HTS in future ?
Service Turret
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Simplified Electrical Circuit Coil Protection
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
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Quench Detection System (Two independent systems)
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Superconducting Outsert Coil
Nb3Sn Strand and 3 Types of Superconductor
High Field Mid Field Low Field
Cable Pattern 4x3x3x3x3=324 5x4x4x3=240 4x4x4x3=192 N sc strands/Cu strands 324/0 120/120 64/128 Strand diameter 0.81mm 0.81mm 0.81mm Jc-nocu (12T,4.2K) >2100A/mm2 >2100 A/mm2 >2100 A/mm2 Type of strand : Nb3Sn RRP or PIT RRP or PIT RRP or PIT Strand coating Chrome plating Chrome plating Chrome plating Void fraction 29+/-1% 29+/-1% 29+/-1%
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Resistive Insert Coil Horizontal
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Superconducting Outsert Coil
Final Assembly
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Superconducting Outsert Coil
Final Assembly
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Superconducting Outsert Coil
Final Assembly
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Sample 4He Evaporator
3He Evaporator
Sample Environment
Closed Cycle Refrigerator
as precooling stage
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Hybrid Magnet + Technical Infrastructure
Operation: § 400 V / 20 kA DC power supply
§ Helium refrigerator for CICC coil, radiation shields and current leads
§ high pressure, high purity cooling water 4 / 8 MW cooling power for resistive coil 22
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
HZB Neutron Scattering Facilities
HFM Assembly and Test Site in Technics Building
Technics Building: § DC power supply § Helium refrigerator § cooling water facility
Neutron Instrument & HFM
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Test Load
Helium- Refrigerator
Compressors Pumps
Water Cooling Chiller
Cooling Towers
Water Treatment
AC-Power
Transformers DC-Power
Controls
Test Load
Infrastructure Building
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Control System – Hybrid Magnet
Combine Controls for: Magnet +
Power Supply + Water Cooling + Helium Refrigerator +
Data monitoring and safety procedures User Terminal
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IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), April 2016. Invited presentation 3OrCB_01 given at MT24; Seoul, Korea, October 18 to 23, 2015.
Commissioning Hybrid Magnet
Aug 2015 Start of cooldown of superconducting coil
16 Oct 2014 First successful magnet test at 20 kA (26 T)
12 Dec 2014 Relocation of magnet system from HFM technics building to Neutron Guide Hall
Jan. 2015 Installation of magnet on neutron instrument EXED to Feb. 2015 Start HFM/EXED commissioning
07 Apr 2015 Successful test on instrument 20 kA (26 T) for 3 hours
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