Abstract
We present a new high field magnetometry technique, based on infrared spectroscopy on cesium vapor.
The developed prototype shows powerful features, such as continuous measurement, fast sampling rate, robustness to field gradients, and high sensitivity and accuracy. The fiber-coupled probes are made from non-metallic components, making them ideal for low interference measurements. The technique works well above 1 T, with no theoretical upper limit (at least until a couple of thousands of teslas).
The prototype is realized as a fairly mature system, integrated in a 19 inch rack with four separate probes. It is being developed and tested in a 7 T MRI scanner, with the goal to demonstrate applications in medical MRI. However, the method, being quite different from conventional methods for high field magnetometry, might also find applications in fusion reactors, particle accelerators, or any other place where high magnetic fields need to be stabilized or monitored.
The work is based on recent fundamental advances in the understanding of the magnetic field dependence of the cesium D2 line (https://arxiv.org/abs/2208.00077, accepted for publication in PRX)
Preliminary prototype specification:
Magnetometer type: Scalar
Sampling rate: 20 kHz (up to 200 kHz by sacrificing sensitivity)
Sensitivity: 20 uT
Absolute accuracy: 70 uT
Probe dimensions: 90x33x10 mm^3
Probe material: Plastic and glass
The developed prototype shows powerful features, such as continuous measurement, fast sampling rate, robustness to field gradients, and high sensitivity and accuracy. The fiber-coupled probes are made from non-metallic components, making them ideal for low interference measurements. The technique works well above 1 T, with no theoretical upper limit (at least until a couple of thousands of teslas).
The prototype is realized as a fairly mature system, integrated in a 19 inch rack with four separate probes. It is being developed and tested in a 7 T MRI scanner, with the goal to demonstrate applications in medical MRI. However, the method, being quite different from conventional methods for high field magnetometry, might also find applications in fusion reactors, particle accelerators, or any other place where high magnetic fields need to be stabilized or monitored.
The work is based on recent fundamental advances in the understanding of the magnetic field dependence of the cesium D2 line (https://arxiv.org/abs/2208.00077, accepted for publication in PRX)
Preliminary prototype specification:
Magnetometer type: Scalar
Sampling rate: 20 kHz (up to 200 kHz by sacrificing sensitivity)
Sensitivity: 20 uT
Absolute accuracy: 70 uT
Probe dimensions: 90x33x10 mm^3
Probe material: Plastic and glass
| Original language | English |
|---|---|
| Publication date | 12 Sept 2023 |
| Number of pages | 1 |
| Publication status | Published - 12 Sept 2023 |
| Event | Magnet Technology - Duration: 10 Sept 2023 → 15 Sept 2023 Conference number: 28 |
Conference
| Conference | Magnet Technology |
|---|---|
| Number | 28 |
| Period | 10/09/2023 → 15/09/2023 |