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Spectral characterization of plastic scintillation detector response as a function of magnetic field strength
| Content Provider | Scilit |
|---|---|
| Author | Simiele, Eric A. Kapsch, Ralf-Peter Ankerhold, Ulrike Culberson, Wesley S. DeWerd, Larry Albert |
| Copyright Year | 2018 |
| Description | Journal: Physics in Medicine & Biology Purpose: To characterize intensity and spectral response changes in a plastic scintillation detector (PSD) as a function of magnetic field strength. Methods: Spectra measurements as a function of magnetic field strength were performed using an optical spectrometer. The response of both a PSD and PMMA fiber were investigated to isolate the changes in response from the scintillator and the noise signal as a function of magnetic field strength. All irradiations were performed in water at a photon beam energy of 6 MV. Magnetic field strengths of (0, ±0.35, ±0.70, ±1.05, and ±1.40) T were investigated. Four noise subtraction techniques were investigated to evaluate the impact on the resulting noise-subtracted scintillator response with magnetic field strength. The noise subtraction methods included direct spectral subtraction, the spectral method, and variants thereof. Results: The PMMA fiber exhibited changes in response of up to 50% with magnetic field strength due to the directional light emission from Čerenkov radiation. The PSD showed increases in response of up to 10% when not corrected for the noise signal. Decreases in the Čerenkov light ratio with negative field strength were observed with a maximum change at -1.40 T of 3.2% compared to 0 T. The change in the noise-subtracted PSD response with magnetic field strength varied with the noise subtraction technique used. Even after noise subtraction, the PSD exhibited changes in response of up to 5.5% over the four noise subtraction methods investigated. Conclusions: When uncorrected for noise, PSD response increases with magnetic field strength by up to 10%, which is in agreement with previous investigations of scintillator response in magnetic fields. Applying noise subtraction reduces the increase in PSD response to 5.5%. However, the change in PSD response with magnetic field strength varies depending on the noise-subtraction method used. |
| Related Links | http://iopscience.iop.org/article/10.1088/1361-6560/aab56c/pdf |
| ISSN | 00319155 |
| e-ISSN | 13616560 |
| DOI | 10.1088/1361-6560/aab56c |
| Journal | Physics in Medicine & Biology |
| Issue Number | 8 |
| Volume Number | 63 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2018-03-09 |
| Access Restriction | Open |
| Subject Keyword | Journal: Physics in Medicine & Biology Magnetic Field Dosimetry Scintillation Detector |
| Content Type | Text |
| Resource Type | Article |
| Subject | Radiology, Nuclear Medicine and Imaging Radiological and Ultrasound Technology |
