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Isidori T, McCavana P, McClean B, McNulty R, Minafra N, Raab N, Rock L, Royon C. Performance of a low gain avalanche detector in a medical linac and characterisation of the beam profile. Phys Med Biol 2021; 66. [PMID: 34038869 DOI: 10.1088/1361-6560/ac0587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 05/26/2021] [Indexed: 11/11/2022]
Abstract
Low gain avalanche detectors can measure charged particle fluences with high speed and spatial precision, and are a promising technology for radiation monitoring and dosimetry. A detector has been tested in a medical linac where single particles were observed with a time resolution of 50 ps. The integrated response is similar to a standard ionising chamber but with a spatial precision twenty times finer, and a temporal precision over 100 million times better, with the capability to measure the charge deposited by a single linac pulse. The unprecedented resolving power allows the structure of the ∼3 μs linac pulses to be viewed and the 350 ps sub-pulses in the train to be observed.
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Affiliation(s)
- T Isidori
- Department of Physics & Astronomy, University of Kansas, Lawrence, KS 66045, United States of America
| | - P McCavana
- St. Luke's Hospital, Rathgar, Dublin 6, Ireland.,School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
| | - B McClean
- St. Luke's Hospital, Rathgar, Dublin 6, Ireland.,School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
| | - R McNulty
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
| | - N Minafra
- Department of Physics & Astronomy, University of Kansas, Lawrence, KS 66045, United States of America
| | - N Raab
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
| | - L Rock
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland.,Beacon Hospital, Sandyford, Dublin 18, Ireland
| | - C Royon
- Department of Physics & Astronomy, University of Kansas, Lawrence, KS 66045, United States of America
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