Proton Beam Monitoring with a Diamond Junction Device Proton Beam Monitoring with a Diamond Junction Device This project will establish the viability of a pixelated proton beam monitor based on a diamond junction device. Diamond is a unique semiconductor with optimal properties for efficient charge collection as a radiation detector and a high resistance to radiation damage. ASU is a leader in the growth and fabrication of diamond electronic junction devices including the development of high power junction diodes based on the same materials technology to be used in this program. The specific application of this project is beam monitoring at the Mayo Clinic proton beam cancer therapy center. The state-of-the-art proton therapy facility will employ pencil beam scanning with intensity modulation. During therapy it is necessary to monitor the prescribed dose applied through the primary beam. Current approaches employ ionization chambers and multi-wire proportional chamber which are limited in accuracy and sensitivity and require regular (time consuming) calibration. Solid state detectors would have substantial advantages in dynamic range, precision and calibration and it appears that diamond is the ideal semiconductor for this application. This project presents a path to develop a pixelated detector to provide unprecedented resolution of the radiation provided during proton beam therapy. The specific outcomes of the project would be 1) the fabrication and testing of a pixilated diamond detector, 2) a simulation based model that would establish the viability of 2D diamond detectors, and 3) a strategy for integrating the new diamond detector technology into a proton beam therapy facility. The results will establish the basis for a full proposal to optimize materials and design and produce an engineering prototype.
|Effective start/end date||1/1/16 → 6/30/17|
- ASU: Mayo Seed Grant: $48,200.00
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