LDA6
DEMAGNETIZER/MAGNETIZER SYSTEM
- AF DEMAGNETIZATION OF ROCK SAMPLES
- AF FIELD UP TO 200 mT
- TWO-AXIS TUMBLING OF SPECIMEN
- ANHYSTERTIC MAGNETIZATION - DC FIELD UP TO 1 mT
- IMPULSE MAGNETIZATION - DC FIELD UP TO 50 mT
- 18 PREDEFINED ORIENTATIONS OF MAGNETIZATION
General description
LDA6 is a complex laboratory magnetic treatment system that integrates AF Demagnetizer with Anhysteretic and low-field Impulse Magnetizer. Its sophisticated design allows very precise setting of AC field amplitude up to 200 mT, anhysteretic DC field intensity up to 1 mT, and impulse DC field intensity up to 50 mT. The sample holder is constructed as a two-axis tumbler, allowing random rotation or sample positioning in eighteen discrete orientations. Although optimized for standard-size paleomagnetic specimens, the tumbler can accommodate approx. 10 cc of rocks, environmental or man-made materials. All these parameters are controlled by user friendly control software LDA6.
Sample is fixed in special 2-axis tumbler, which provides semi-random rotation of the sample during demagnetization process or setting one of the 18 position for demagnetization in desired direction. Advanced control electronics gives very well defined amplitude and pure sinusoidal shape of alternating field. Triple mu-metal shielding serves for elimination of local magnetic fields, so it is not necessary to use such demagnetizer in low-field cage.
Main features
| ■ | Wide range of precisely set demag-netizing and magnetizing field intensities |
| ■ | Tumbling specimen, 3-axis or single axis demagnetization |
| ■ | Three courses and rates of alternating field decrease |
| ■ | Three AC field decrease rates 1 , 3 or 9 mT/s and three shapes of AC field decrease waveforms |
| ■ | AC field plato up to 30 s |
| ■ | Anhysteretic magnetization in 18 predefined directions |
| ■ | Partial anhysteretic magnetization |
| ■ | Impulse magnetization with impulse length from 0.01 s up to 10 s |
| ■ | Triple mu-metal shielding |
| ■ | Computer controlled instrument that can optionally work in conjun-ction with AGICO JR6 Spinner Magnetometer |
Technical specifications
| Alternating field amplitude | 1 -200 mT (peak) |
| Anhysteretic DC field | 1 μT - 1000 μT |
|
| Impulse DC field | 1 mT - 1000 mT |
|
| Accuracy of set field | ± 1 % |
| Field homogeneity | better than 98 % |
| Total Harmonic Distortion of alternating field | < 0.1% |
| Tumbling specimen or 3-axes demagnetization |
| Sets 18 magnetization directions |
| Dimensions and mass | 115x63x45 cm (l x h x w), 125 kg |
| Power requirements | 120 and 230 V, 50/60 Hz, 1600 VA |
Specimens to be demagnetized
| Cylinder (regularly shaped specimens) | |
| Diameter | 25.4 ± 1 mm |
| Length | 22.0 ± 1 mm |
| Cube | 23x23x23 mm |
| | 20x20x20 mm |
