Search results for "Physics::Accelerator Physics"
showing 10 items of 1235 documents
The experimental setup of the Interaction in Crystals for Emission of RADiation collaboration at Mainzer Mikrotron: Design, commissioning, and tests
2015
Silicon/germanium flat/bent crystals are thin devices able to efficiently deflect charged particle GeV-energy beams up to a few hundreds of μrad; moreover, high intensity photons can be efficiently produced in the so-called Multi-Volume Reflection (MVR) and Multiple Volume Reflections in One Crystal (MVROC) conditions. In the last years, the research interest in this field has moved to the dynamic studies of light negative leptons in the low energy range: the possibility to deflect negative particles and to produce high intensity γ sources via the coherent interactions with crystals in the sub-GeV energy range has been proved by the ICE-RAD (Interaction in Crystals for Emission of RADiation…
Characterization of PTW-31015 PinPoint ionization chambers in photon and proton beams
2018
The increased use of complex forms of radiotherapy using small-field photon and proton beams has invoked a growing interest in the use of micro-ionization chambers. In this study, 48 PTW-TM31015 PinPoint-type micro-ionization chambers that are used in the commissioning and patient specific QA of a proton pencil beam scanning (PBS) delivery system have been characterized in proton and high-energy photon beams. In both beam modalities, the entire set of PinPoint chambers was characterized by imaging them, by evaluating their stability using check source measurements, by experimentally determining the ion recombination, polarity effect and by cross calibrating them in terms of absorbed dose to…
The FiR 1 photon beam model adjustment according to in-air spectrum measurements with the Mg(Ar) ionization chamber.
2014
Abstract The mixed neutron–photon beam of FiR 1 reactor is used for boron–neutron capture therapy (BNCT) in Finland. A beam model has been defined for patient treatment planning and dosimetric calculations. The neutron beam model has been validated with an activation foil measurements. The photon beam model has not been thoroughly validated against measurements, due to the fact that the beam photon dose rate is low, at most only 2% of the total weighted patient dose at FiR 1. However, improvement of the photon dose detection accuracy is worthwhile, since the beam photon dose is of concern in the beam dosimetry. In this study, we have performed ionization chamber measurements with multiple b…
Atomic physics studies at the gamma factory at CERN
2020
The Gamma Factory initiative proposes to develop novel research tools at CERN by producing, accelerating and storing highly relativistic, partially stripped ion beams in the SPS and LHC storage rings. By exciting the electronic degrees of freedom of the stored ions with lasers, high-energy narrow-band photon beams will be produced by properly collimating the secondary radiation that is peaked in the direction of ions' propagation. Their intensities, up to $10^{17}$ photons per second, will be several orders of magnitude higher than those of the presently operating light sources in the particularly interesting $\gamma$--ray energy domain reaching up to 400 MeV. This article reviews opportuni…
"Table_F32" of "T and F asymmetries in $��^0$ photoproduction on the proton"
2022
Beam-target asymmetry F for c.m. energy W= 1.8577 GeV
"Table_F24" of "T and F asymmetries in $��^0$ photoproduction on the proton"
2022
Beam-target asymmetry F for c.m. energy W= 1.7323 GeV
"Table_F29" of "T and F asymmetries in $��^0$ photoproduction on the proton"
2022
Beam-target asymmetry F for c.m. energy W= 1.8117 GeV
"Table_F26" of "T and F asymmetries in $��^0$ photoproduction on the proton"
2022
Beam-target asymmetry F for c.m. energy W= 1.7645 GeV
"Table_F27" of "T and F asymmetries in $��^0$ photoproduction on the proton"
2022
Beam-target asymmetry F for c.m. energy W= 1.7804 GeV
"Table_F12" of "T and F asymmetries in $��^0$ photoproduction on the proton"
2022
Beam-target asymmetry F for c.m. energy W= 1.5249 GeV