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discuss piece arrendondo, after we're hearing stunning reports of law enforcement just outside the classroom. and on nbc news, a top kremlin official broke russia's silence on the two u.s. veterans captured in ukraine. we'll get the latest from moscow. primary elections in virginia and washington, d.c. with runoffs in three other states. steve kornacki will break down what you need to know. and we are just three hours away from another key hearing by the house january 6th committee. the panel plans to lay out an elaborate effort by former president donald trump and his allies t...

This thesis aims to characterise the accuracy of a new active CMOS pad detector for dosimetry in HDR Brachytherapy. A 1x1x1 mm3 detector is doped with high resistivity n-type silicon, thickness of 100 μm (Wafer10) and 48 μm (Wafer20) epitaxial substrate and built in standard CMOS along with a transimpedance amplifier. This work investigates and examine this detector’s sensitivity and signal to noise ratio in air for use in High Dose Rate Brachytherapy (HDR BT) dosimetry. To understand operational characteristics of the detector, a current-voltage (I-V) characteristic curve was created, and...

Zoho Webinar provides a powerful platform for hosting interactive and engaging virtual conferences with remote teams.

Zoho Webinar provides a powerful platform for hosting interactive and engaging virtual conferences with remote teams.

We assessed the accuracy of a prototype radiation detector with a built in CMOS amplifier for use in dosimetry for high dose rate brachytherapy. The detectors were fabricated on two substrates of epitaxial high resistivity silicon. The radiation detection performance of prototypes has been tested by ion beam induced charge (IBIC) microscopy using a 5.5 MeV alpha particle microbeam. We also carried out the HDR Ir-192 radiation source tracking at different depths and angular dose dependence in a water equivalent phantom. The detectors show sensitivities spanning from (5.8 ± 0.021) × 10−8 to ...