During a radiation therapy treatment, many factors may influence the proper delivery of a calculated dose distribution. Some of these factors include misalignment of the treatment beam with respect to the patient, external or internal patient motion, or inaccurate positioning of beam-modifying devices.1 In order to quantify these geometric inaccuracies during treatment, a portal image is typica...

Old results of Letaw on scalar vacuum radiation patterns that could be of interest for phonon analogies are used to emphasize the radio-metric nature of the Frenet-Serret invariants of the stationary worldlines, rather than sticking to the thermal interpretation of the vacuum excitations as apparent for the uniformly accelerated quantum detector (Unruh's interpretation). I focus next on the ele...

Based on recent data of radiation effects in p-type detectors, the expected performance of planned short silicon strip detectors (SSSD) in the ATLAS upgrade tracking detector are evaluated. The signal-to-noise ratio and power generated will be presented as a function of a set of realistic values for the operating parameters: fluence (3·10, 1·10, 3·10 neq/cm), operating temperature (-30C, -20C, ...

Based on recent data of radiation effects in p-type detectors, the expected performance of planned short silicon strip detectors (SSSD) in the ATLAS upgrade tracking detector are evaluated. The signal-to-noise ratio and power generated will be presented as a function of a set of realistic values for the operating parameters: fluence (3·10, 1·10, 3·10 neq/cm), operating temperature (-30C, -20C, ...

This note describes how beam collimation affects detector backgrounds at the collision point for the PEP-II Bfactory, a joint effort of three laboratories: LBNL, LLNL, and SLAC. Beam collimation controls the transverse size as well as the maximum allowed energy spread of the beam. The location of synchrotron radiation masks is determined by the transverse size of the beam in that the masks must...

A commercial optically stimulated luminescence (OSL) system developed for radiation protection dosimetry by Landauer, Inc., the InLight microStar reader, was tested for dosimetry procedures in radiotherapy. The system uses carbon-doped aluminum oxide, Al2O3:C, as a radiation detector material. Using this OSL system, a percent depth dose curve for 60Co gamma radiation was measured in solid water...