Radioluminescence Response of Ce-, Cu-, and Gd-Doped Silica Glasses for Dosimetry of Pulsed Electron Beams

Radiation-induced emission of doped sol-gel silica glass samples was investigated under a pulsed 20-MeV electron beam. The studied samples were drawn rods doped with cerium, copper, or gadolinium ions, which were connected to multimode pure-silica core fibers to transport the induced luminescence from the irradiation area to a signal readout system. The luminescence pulses in the samples induced by the electron bunches were studied as a function of deposited dose per electron bunch. All the investigated samples were found to have a linear response in terms of luminescence as a function of electron bunch sizes between 10−5 Gy/bunch and 1.5×10−2 Gy/bunch. The presented results show that these types of doped silica rods can be used for monitoring a pulsed electron beam, as well as to evaluate the dose deposited by the individual electron bunches. The electron accelerator used in the experiment was a medical type used for radiation therapy treatments, and these silica rod samples show high potential for dosimetry in radiotherapy contexts.

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Radiation-induced luminescence from sol-gel silica glasses and phosphosilicate glasses by 1MeV H+ and 3MeV Zr2+ irradiations

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ◽

10.1016/j.nimb.2005.08.204 ◽

2006 ◽

Vol 242 (1-2) ◽

pp. 406-408

Author(s):

Sin-iti Kitazawa ◽

Shunya Yamamoto ◽

Masaharu Asano ◽

Shintaro Ishiyama

Keyword(s):

Sol Gel ◽

Silica Glasses ◽

Radiation Induced

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Radiation-induced luminescence and photoluminescence from sol–gel silica glasses and phosphosilicate glasses by 1MeV H+ irradiations

Physica B Condensed Matter ◽

10.1016/j.physb.2004.03.134 ◽

2004 ◽

Vol 349 (1-4) ◽

pp. 159-165 ◽

Cited By ~ 5

Author(s):

Sin-iti Kitazawa ◽

Shunya Yamamoto ◽

Masaharu Asano ◽

Shintaro Ishiyama

Keyword(s):

Sol Gel ◽

Silica Glasses ◽

Radiation Induced

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High resolution electron beam measurements on the ALPHA-X laser–plasma wakefield accelerator

Journal of Plasma Physics ◽

10.1017/s0022377812000220 ◽

2012 ◽

Vol 78 (4) ◽

pp. 393-399 ◽

Cited By ~ 6

Author(s):

G. H. WELSH ◽

S. M. WIGGINS ◽

R. C. ISSAC ◽

E. BRUNETTI ◽

G. G. MANAHAN ◽

...

Keyword(s):

Electron Beam ◽

High Resolution ◽

Laser Plasma ◽

Electron Bunch ◽

High Energy ◽

Energy Spread ◽

Gas Jet ◽

X Rays ◽

Electron Bunches ◽

Wakefield Accelerator

AbstractThe Advanced Laser–Plasma High-Energy Accelerators towards X-rays (ALPHA-X) programme at the University of Strathclyde is developing laser–plasma accelerators for the production of ultra-short high quality electron bunches. Focussing such LWFA bunches into an undulator, for example, requires particular attention to be paid to the emittance, electron bunch duration and energy spread. On the ALPHA-X wakefield accelerator beam line, a high intensity ultra-short pulse from a 30 TW Ti:Sapphire laser is focussed into a helium gas jet to produce femtosecond duration electron bunches in the range of 90–220 MeV. Measurements of the electron energy spectrum, obtained using a high resolution magnetic dipole spectrometer, show electron bunch r.m.s. energy spreads down to 0.5%. A pepper-pot mask is used to obtain transverse emittance measurements of a 128 ± 3 MeV mono-energetic electron beam. An average normalized emittance of ϵrms,x,y = 2.2 ± 0.7, 2.3 ± 0.6 π-mm-mrad is measured, which is comparable to that of a conventional radio-frequency accelerator. The best measured emittance of ϵrms,x, = 1.1 ± 0.1 π-mm-mrad corresponds to the resolution limit of the detection system. 3D particle-in-cell simulations of the ALPHA-X accelerator partially replicate the generation of low emittance, low energy spread bunches with charge less than 4 pC and gas flow simulations indicate both long density ramps and shock formation in the gas jet nozzle.

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Магнитные и люминесцентные свойства нанопорошка фторида бария, полученного методом испарения импульсным электронным пучком в газе низкого давления

Письма в журнал технической физики ◽

10.21883/pjtf.2018.17.46566.17270 ◽

2018 ◽

Vol 44 (17) ◽

pp. 19

Author(s):

С.Ю. Соковнин ◽

В.Г. Ильвес ◽

М.Г. Зуев ◽

М.А. Уймин

Keyword(s):

Electron Beam ◽

Bulk Material ◽

Luminescent Properties ◽

Electron Beam Evaporation ◽

Structural Defects ◽

Synthesis Process ◽

Magnetic Response ◽

Pulsed Electron Beam ◽

Radiation Induced ◽

Size And Morphology

AbstractMesoporous amorphous-crystalline nanopowders of BaF_2 with the specific surface area up to 34.8 m^2/g were obtained using evaporation by a pulsed electron beam in vacuum. Influence of the thermal annealing of the BaF_2 nanoparticles in air at the temperatures from 200 to 900°C on the size and morphology of the particles and changes in their magnetic and luminescent properties was studied. The paramagnetic response of the BaF_2 nanopowder was found to transform to the ferromagnetic response after annealing at 900°C. The appearance and transformation of the magnetic response in nanopowders made of BaF_2, which is diamagnetic as the bulk material, are ascribed to the appearance of radiation-induced and structural defects during the synthesis process by pulsed electron-beam evaporation.

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