OptiMag Systems
 Standard OptiMag systems (OM series)
feature magnetic fields of 6-9 Tesla, sample tube diameters of 1.25" - 1.75", a
12 liter useful capacity helium reservoir and bottom optical access along the
vertical field axis. They offer efficient operation with static hold times of
~60 hours, and are available with field homogeneities of ± 0.5% and ± 0.1%
over a 1 cm diameter sphere. Larger OM models are offered for higher magnetic
fields (10 T – 16 T), larger sample tubes, longer helium hold times and better
field homogeneities (± 0.01% - 0.001% over a 1 cm diameter sphere) are also
available. As for the SuperVariMag systems, the OptiMag systems are offered
with split pair coils along with double or triple coil configurations in various field strengths for horizontal field directions or rotating
vector fields. Magnets with cancellation coils are also offered for
Mössbauer
spectroscopy vertical drive systems, where the both the source and the
absorber are top loaded into the sample space and cooled down to helium
temperatures.When required, Janis also offers 9 T/ 11 T up to 14 T/ 16 T magnets with a Lambda point refrigerator (LPR) for operation at the higher field, with the reservoir at atmospheric pressure. The temperature of the sample can be varied between 1.5 K and 325 K, and optical access to the sample is along the direction of the magnetic field (straight solenoid magnets), from the bottom (or top) of the cryostat. The bottom window in the sample tube is typically an indium sealed sapphire window, or a Mylar window (for Mössbauer spectroscopy). A variety of strain relief mounted, indium sealed bottom windows from other window materials is available for transmission in various ranges of the electromagnetic spectrum. Customized systems can also be supplied with He-3 inserts for temperatures below 1.4 K. |
Standard OptiMag Systems
| Model |
Magnetic Field Strength |
Field Homogeneity |
Sample Tube Diameter |
| *Th-OM-d | 6 - 9 Tesla | ± 0.5 - ±0.1% | 1.25 - 1.75" |
| *Th-OM-d | 10 - 14 Tesla | ± 0.1% | 1.25 - 1.75" |
| Special-OM-d | Horizontal Field | ± 0.5 - ±0.1% | 1.25 - 1.75" |
|
* Specify a number for the intensity of the magnetic field. h: Specify the homogeneity "h" d: Specify the diameter of the sample chamber "d" Contact Janis for horizontal field magnets and double or triple axis coil systems. | |||
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Table of Contents |
Page |
| Introduction | 1 |
| He-4 systems | |
| 2 | |
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3 |
| 4 | |
| Room Temperature Bore systems | 5 |
| He-3 systems | 6 |
| Dilution Refrigerators | 7 |
| Special Systems | |
| 8 | |
| 9 | |
| 10 |
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JANIS RESEARCH COMPANY, INC.
2 Jewel Drive, P.O. Box 696
Wilmington, MA 01887-0696 USA
TEL: +1-978-657-8750 FAX: +1-978-658-0349
E-Mail: sales@janis.com
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