Background: in radiation treatment of moving targets located in thorax region of patient body, the delivered dose does not match with the planned treatment, resulting in some over and under dosage in the tumor volume, as a function of motion magnitude and frequency. Several efforts have been done to investigate the target motion effects on dose distribution in the target and surrounding normal ...

A 512 512 CMOS active pixel sensor (APS) was designed and fabricated in a standard 0.5m technology. The radiation tolerance of the sensor has been evaluated with Co-60 and proton irradiation with proton energies ranging from 11.7 to 59 MeV. The most pronounced radiation effect is the increase of the dark current. However, the total ionizing dose-induced dark current increase is orders of magnit...

We studied the effects ion beam irradiation on carbon nanotube (CNT) yarns. CNT yarn was fabricated by drawing and spinning CNT sheets from a vertically aligned CNT forest. The yarn was irradiated by 2.5 MeV protons in either vacuum or air. Irradiation in air was achieved by directing the proton beam through a 0.025 mm thick Ti window. Irradiation in vacuum occurred at a pressure of <10-6 torr ...

Based on results of tritium measurement in the SS316 specimens irradiated up to 5.9 dpa in the SINQ target (580MeV proton) using a thermal desorption (TDS) method, trap site density and trap energy in the materials induced by the high-energy proton irradiation have been evaluated by means of the numerical tritium transport analysis. The results indicate that almost residual tritium in the SS316...

The TRIUMF Proton Irradiation Facility can cover an energy range from below 20 MeV to 500 MeV using two extracted proton beam lines which operate into the same experimental area. The range of proton intensities is ideal for single event effect testing and high enough for some radiation damage testing of components. Neutrons, pions and higher intensity protons are also available at TRIUMF. Keywo...

Radiation affects several cellular and molecular processes, including double strand breakage and modifications of sugar moieties and bases. In outer space, protons are the primary radiation source that poses a range of potential health risks to astronauts. On the other hand, the use of proton irradiation for tumor radiation therapy is increasing, as it largely spares healthy tissues while killi...

distortion of the ideal domain shape and size thus making fabrication of fine domains challenging [3]. Poling inhibition (PI) induced by UV laser irradiation [6, 7] in congruent (CLN) and MgO-doped LN can overcome the limitation of EFP by reducing the aspect ratio of the inverted domains allowing for the fabrication of finer domain structures. This method is capable of producing domains with a ...

The effect of proton irradiation (proton energy 15 MeV) on the parameters high-voltage 4H-SiC integrated Schottky diodes (JBS) was studied for first time in operating temperature range Ti (23 and 175 o C). blocking voltage under study, U b , 600 1700 V. For devices with U_b = V, fluence 5·10 13 -1·10 14 cm -2 ; U_b=1700 3·10 -6·10 . An increase leads to a noticeable decrease current-voltage cha...