Solenoid superconducting magnets

Superconducting magnet winding

Based upon our years of experience in the design and manufacture of superconducting solenoids for physics research, NMR and special applications, we are able to offer a wide range of solenoid superconducting magnets, from standard to fully custom-designed, with a matching range of cryostats and low temperature inserts.

Standard magnets & options
Standard dewars & options
Sample environments

Our standard liquid-helium cooled solenoid magnets are specified as shown below:

	Field at 4.2 K (T)	Field at 2.2 K (T)	Magnet 'cold' bore (mm)	Homogeneity (1 cm dsv*)	Field decay rate
S08/10/52/13	8	10	52	1 part in 10-3 relative (0.1%)	1 part in 10-4 relative per hour (0.01%/hour)
S10/12/52/13	10	12
S12/14/52/13	12	14
S14/16/52/13	14	16
S15/17/52/13	15	17
S16/18/52/13	16	18
S18/20/52/13	18	20

* diameter spherical volume

Magnet options

Magnet cold bore size	64 mm or 77 mm
Homogeneity	Up to 1 part in 10-6 relative (0.0001%; 1 ppm)
Field decay rate	Up to 1 part in 10-6 relative per hour (0.0001%/hour; 1 ppm/hour)

Compensation coils can be used to improve the homogeneity at the centre of the field by reducing the rate at which the field drops at the end of the coils.
Shim coils are used to remove residual field gradients, and may be wired in series with the main coils to give a basic level of correction ('series shims') or independently to give finer adjustment ('independent shims' with their own ISS10 shim power supply).
Modulation and gradient coils can be fitted into the bore of the magnet to provide a modulated (typically sinusoidal ac) magnetic field or a field gradient across the sample space. A single coils offers both options, and is powered via a separate set of current leads.
Cancellation coils may be fitted above and/or below a magnet to give a low field region close to the centre of field, frequently used with dilution refrigerator systems (see the 'Sample environments' tab on this page).

Further magnet and dewar options exist through custom designed magnet systems - please contact us for details.

A range of standard cryostats ('dewars') is available, from which we can help you select the optimum solution for your application and budget.

Dewar options

Vapour-shielded dewar
Low loss liquid-nitrogen shielded dewar
NMR-style dewar

IntegraAC recondensing dewar

Reduce liquid helium usage and extend time between refills by reducing static mode helium boil-off to zero

Demountable current leads can be fitted to give reduced helium consumption where the application requires the magnet to be in persistent mode for the majority of time

Further magnet and dewar options exist through custom designed magnet systems - please contact us for details.

Integra systems

Our solenoids magnets make up part of the Integra product family which provides a fully configurable, integrated set of (ultra-) low temperature and magnetic environments, combining magnetic fields with low temperature inserts from 7 mK to 400 K. All solenoid magnets are fully compatible with the full low temperature range of inserts. This includes:

Variable temperature inserts (VTIs) providing a temperature range from 1.5 K to 300 K (400 K optional)
The Heliox range of 3He inserts for temperatures as low as 300 mK
The Kelvinox range of dilution refrigerators for temperatures as low as 7 mK

Integra combined environments