Related Experiment Video
Updated: Jan 31, 2026
09:11
Alternating Magnetic Field-Responsive Hybrid Gelatin Microgels for Controlled Drug Release
Published on: February 13, 2016
10.3K
Effect of Magnetic Field Strength on Plastic Scintillation Detector Response
F Therriault-Proulx1, Z Wen1, G Ibbott1
1Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 1420, Houston, TX, USA.
Radiation Measurements
|December 19, 2018
Summary
Plastic scintillation detectors (PSDs) show a slight increase in response with higher magnetic fields, but stem-effect correction minimizes this, making them suitable for dosimetry in magnetic environments.
Area of Science:
- Medical Physics
- Radiation Detection
- Dosimetry
Background:
- Plastic scintillation detectors (PSDs) are used in radiation dosimetry.
- External magnetic fields can potentially affect detector performance.
- Understanding detector response in magnetic fields is crucial for accurate measurements.
Purpose of the Study:
- To investigate the response of PSDs to high-energy photon radiation under varying magnetic field strengths.
- To quantify the impact of magnetic fields on PSD light emission and overall response.
Main Methods:
- PSDs were irradiated with a 6-MV photon beam within a plastic phantom.
- Magnetic fields ranging from 0 T to 1.5 T were applied.
- Light emission and stem-effect-corrected responses of commercial and in-house PSDs were measured.
Main Results:
- Light emission from PSDs increased by 10%-20% with increasing magnetic field strength.
- Stem-effect correction reduced the observed increase in PSD response to 2.4%.
- The primary cause of the increase was attributed to Cerenkov light production and transmission.
Conclusions:
- PSDs demonstrate reduced magnetic field dependence when stem effects are properly corrected.
- PSDs exhibit favorable water equivalence compared to ion chambers in previous studies.
- PSDs show significant potential for quality assurance and in-vivo dosimetry in magnetic field environments.
Related Concept Videos
01:27Magnetic Fields
7.3K
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
A magnetic field is defined by the force that a charged particle experiences...
7.3K
01:18Magnetic Field of a Solenoid
5.9K
A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...
Consider a solenoid with 100 turns wrapped around a cylinder of...
5.9K
01:19Magnetic Field Lines
5.8K
The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:
Magnetic field lines follow several hard-and-fast rules:
5.8K
01:24Energy In A Magnetic Field
2.7K
If a magnetic field is sustained, there must be a current in a closed circuit or loop, implying some energy has been spent in creating the field. If this energy is not dissipated via the circuit's resistance, it is stored in the field.
Take an ideal inductor with zero resistance. Although it's practically impossible, assume that the coil's resistance is so small that it is practically negligible. The loss of the field's energy to dissipate thermal energy (or heat) is thus...
Take an ideal inductor with zero resistance. Although it's practically impossible, assume that the coil's resistance is so small that it is practically negligible. The loss of the field's energy to dissipate thermal energy (or heat) is thus...
2.7K
01:16Magnetic Field Of A Current Loop
6.3K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
6.3K
01:23Magnetic Field due to Moving Charges
11.6K
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
11.6K