www.cryogenic.co.uk
Papers Cryogenic News March 2012
World’s first 18 Tesla Cryogen Free VSM Measurement system with sample rotating He-3 insert
Cryocooled Cryostat For Use With Ccc/Josephson Array Inserts
Measurement Probe Brochures
March 2012
CNC R Y O G E N I CN E W S
Rotating He-3 refrigerator probe for use in Cryogen Free VTI
Temperatures down to 300 mK
Parasitic He-3 top loaded into the Cryogen Free VTI
24 hour hold time
20 pin CLCC sample holder
5 mm x 5 mm sample mounting area
Sample rotation through Xo
World’s first 18 Tesla Cryogen Free VSM Measurement system with sample rotating He-3 insert High field magnet system for VSM, Resistivity, AC Susceptibility,
Specific heat, and Thermal transport measurements. Variable Temperature Sample Space (1.6 -300K) High power pulse tube cryocoolers with low vibration
www.cryogenic.co.uk
www.cryogenic.co.uk
CRYOGENIC NEWS
The vertically-aligned solenoid is housed in a compact cryostat with a 58.5 mm diameter room-temperature bore offering unprecedented accessibility to the levitated sample. A single 1.5 W pulse-tube cold-head is used to cool the magnet system with remote-motor and linear-drive to minimise vibrations.
At its maximum field the magnet generates a peak levitation ‘force’ of 1600 T2/m (for water, stable levitation is achieved at a value of 1370 T2/m or above). At this field the levitation point for a water droplet is situated just 22 mm inside the main bore-tube (46 mm below the cryostat top-plate).
An optional variable-temperature cryostat is available allowing the full central-field to be used for temperature dependent experiments. This can be supplied with airlock, gate-valve, top-loading measurement probes and parasitic helium-3 for temperatures down to 300 mK.
Key Features
Non-stop operation: Continuous sweeping between +/-7 Tesla
Fast cooldown: Fully operational within 5 hours of switch on
Fast ramping: Ramp rates up to 1.5 T/s. Proven performance of 100 sweeps per hour at +/-7T
Fast recovery: In the event of quench, fully operational again within 15 minutes
Fast warm up: Overnight warm-up with in-built heaters
Power saving mode: Remains operational with one coldhead switched off
In-built thermal buffer: Limits peak temperatures during ramping
Maximum Field: 18.6 T
Maximum B.dB/dZ: 1600 T2m-1
Bore diameter : 58.5 mm
Highest levitation point for water: 46mm below top-plate
Central field homogeneity : 0.1 %
CRYOGEN-FREE SUPERCONDUCTING MAGNET FOR DIAMAGNETIC LEVITATION
Sample in liquid He-3 for optimum thermal contact
Temperature control from 260 mK to 300 K Hold-time >24 hours below 300 mK
using 10 litre charge of He-3 9 Tesla magnet as standard with options
up to 16 Tesla
CRYOGEN-FREE TOP LOADING HELIUM-3 REFRIGERATOR
World’s first 9T/5T/1T Cryogen Free 3D Vector Magnet with Dilution Refrigerator (DR) and temperature down to 10 mK
Vector magnet and Dilution Refrigerator (DR) in shared vacuum space
Large 3D Vector magnet with 50 mm magnet bore and 30 mm sample space in DR 4 Tesla rotatable magnetic field over 4π solid angle
Top loading Dilution Refrigerator for temperatures down to 10 mK
Separate Pulse Tube Cryocoolers for magnet and DR
CRYOGEN-FREE 3D VECTOR MAGNETFAST RAMPING 7 TESLA CRYOGEN-FREE MAGNET SYSTEMCryogenic Ltd has developed a new range of fast-sweeping cryogen-free superconducting magnets using high-performance Nb3Sn coils. These magnets provide an ideal platform for XMCD and other polarity switching applications. Here we present data for the standard 7 Tesla solenoid version. A continuous sweep rate of 100 sweeps/hour has been achieved between +/-7 Tesla. At +/-4T the same coil can be ramped continuously at full speed without pause giving up to 670 sweeps/hour. The compact design uses 2x Gifford-McMahon cryocoolers, each providing 1.5W cooling power at 4.2K. Alternative designs are available including split-pair magnets with 4-way access and UHV bore.
www.cryogenic.co.uk
WORLD LEADERS IN CRYOGEN-FREE TECHNOLOGY...
Cryogen-free super-conducting magnets to 25 Tesla
No liquid helium needed
Variable temperature sample space (1.6 K - 400 K)
Highly stable magnetic field
High power Pulse Tube cryocoolers with low vibration
No maintenance for 3 1/2 years continuous use
CRYOGEN-FREE MEASUREMENT SYSTEMS 5 TO 25 TESLA
Cryogen-Free 5 Tesla Mini Vibrating Sample Magnetometer, with AC Susceptibility and high temperature facility to 700 K
CRYOGEN-FREE SQUID MAGNETOMETER
High homogeneity cryogen-free 7 Tesla magnet
Completely dry system requiring no liquid helium
Low maintenance Pulse Tube cryocooler
AC and DC measurements with 10-8 EMU sensitivity
Smooth transition across 4.2 K
He-3 Insert for temperatures down to 300 mK
High temperature option
Flexible open LabVIEW software
Real-time data access during measurement
MilliTesla field resolution and setting
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High Temperature Insert with temperatures up to 1000 K
He-3 Insert with temperatures down to 300 mK and 24 hours hold time
Ultra low temperatures down to 50 mK with shielded coil in a cryogen-free Dilution Refrigerator
Temperature Ranges
Vibrating Sample Magnetometer (VSM) for measurements of DC magnetic moment with sensitivity of 10-6 EMU
AC Susceptibility probe
AC Calorimeter to measure Specific Heat and Thermal Conductivity
Resistivity and Hall effect probe with option for sample rotation in field
MFM/AFM and Pressure Cell options
Measurement Options
Cryogen-Free 16 Tesla VSM, 50 mm VTI, with option for Dilution Refrigerator Insert for temperatures down to 50 mK
www.cryogenic.co.uk
Cryogenic LimitedUnits 30 Acton Park Industrial Estate, Acton, London W3 7QE, United Kingdom
Tel: +44 (0)20 8743 6049 Fax: +44 (0)20 8749 5315 Email: [email protected]
9 T along main axis
4 T along secondary axis
8 T/min ramp rate on main coil
4 way UHV access to sample
Vacuum sample change
Electrically isolated sample mount Cryocoolers for magnet and DR
UHV 2-Axis Split Pair Magnet
ULTRA HIGH VACUUM (UHV) CRYOSTATS
Highest magnetic field currently operating on any X-Ray beam line
Ramp rate 2 T/min over +17 T to 17 T and multiple cycles
Vacuum bore
Low-loss Helium Cryostat
17 T UHV Magnet
Cryogen-Free 6 T Split Pair Magnet
Separate UHV sample space
External magnet alignment
Adjustable magnetic tie rods
Internal iron pole piece
Bakeable to 100˚C
Cryogen-free VTI for temperatures down to 1.6 K
He-3 insert for temperatures down to 300 mK
LabVIEW software
Polar or Cartesian control of field vector
World’s first 18 Tesla Cryogen Free VSM Measurement system with sample rotating He-3 insert High field magnet system for VSM, Resistivity, AC Susceptibility,
Specific heat, and Thermal transport measurements. Variable Temperature Sample Space (1.6 -300K)
Temperatures down to 300 mK High power pulse tube cryocoolers with low vibration
CRYOGEN-FREE MEASUREMENT SYSTEMS 5 TO 25 TESLA
Cryogen-free super-conducting magnets to 25 Tesla
No liquid helium needed
Variable temperature sample space (1.6 K - 400 K)
Highly stable magnetic field
High Temperature Insert with temperatures up to 1000 K
He-3 Insert with temperatures down to 300 mK
Temperatures down to 50 mK with a cryogen-free Dilution Refrigerator
High power Pulse Tube cryocoolers with low vibration
No maintenance for 3 1/2 years continuous use
Cryogen-Free 5 Tesla Mini Vibrating Sample Magnetometer, with AC Susceptibility and high temperature facility to 1000 K
Vibrating Sample Magnetometer (VSM) for measurements of DC magnetic moment with sensitivity of 10-6 EMU
AC Susceptibility probe
AC Calorimeter to measure Specific Heat and Thermal Conductivity
Resistivity and Hall effect probe with option for sample rotation in field
MFM/AFM and Pressure Cell options
Measurement Options
Cryogen-Free 16 Tesla VSM, 50 mm VTI, with option for Dilution Refrigerator Insert for temperatures down to 50 mK
Cryogenic LimitedUnits 30 Acton Park Industrial Estate, Acton, London W3 7QE, United Kingdom
Tel: +44 (0)20 8743 6049 Fax: +44 (0)20 8749 5315 Email: [email protected] www.cryogenic.co.uk
Rotating He-3 refrigerator probe for use in Cryogen Free VTI
w w w. c r y o g e n i c . c o . u k
Cryogenic Limited, Unit 30, Acton Park Industrial Estate, The Vale, Acton, London, W3 7QE. United Kingdom.Tel: +44 (0) 20 8743 6049Fax: +44 (0) 20 8749 5315E-mail: [email protected]
CRYOCOOLED CRYOSTAT FOR USE WITH CCC/JOSEPHSON ARRAY INSERTS
l Re-condensing liquid helium CCC cryostatwith 3 inch (76.2 mm) bore access
l Suitable for both CCC and JosephsonArray Insert
l Fitted with 1/2 Watt PT405 Pulse tubecryocooler
l Pressure stabilised helium reservoir tominimise instability in CCC operation
l Low vibration and low maintenance (everythree years)
l Special built-in facility for liquefyinghelium gas from room temperature - Nocryogens required for start-up or operation
l Optimised radiation shield to reduce external heat loads to a minimum
l Open LabVIEW® software.
