Abstracts

The pioneer synthesis of nanocrystals (NCs) published in 1993 opened up new routes to prepare highly monodisperse quantum dots. This, together with the outstanding electronical, optical and surface properties observed in different kinds of such semiconductor nanocrystals, has triggered an increased scientific interest on these nanomaterials. [...]

We present a novel externally seeded cascaded free-electron laser (FEL) scheme based on two echo-enabled har-monic generation stages to obtaining unprecedented bunching independently on the final FEL wavelength.Externally seeded free-electron lasers (FELs) based on harmonic up-conversion schemes represent the mostsuccessful approach for obtaining radiation with laser-like properties at short wavelengths. They are howeverlimited in the shortest achievable wavelengths, as the harmonic conversion efficiency decreases with increasingharmonic number, even for echo-enabled harmonic generation (EEHG) [1] [...]

A concept and design of a 50-Gbps 4-channel dense wavelength division multiplexing (DWDM) optical transceiver is being developed. It is designed in a 45-nm monolithic silicon-photonics CMOS technology. [...]

Results are presented on searches for additional Higgs bosons using the CMS Run 2 data. The searchcovers both low mass (below 125 GeV), in the diphoton and ditau channel, and higher masses in thedecays into b jets and a top pair. [...]

Results are presented on searches for additional Higgs bosons using the CMS Run 2 data. The searchcovers both low mass (below 125 GeV), in the diphoton and ditau channel, and higher masses in thedecays into b jets and a top pair. [...]

Introduction: We developed a Monte Carlo (MC) simulation tool forestimating the absorbed dose in mice organs irradiated with kilovoltage X-ray beamlets. Here we investigated the characteristics ofcollimators for preclinical kilovoltage minibeam radiotherapy [1].Materials & Methods: We adopted gCTD, a GPU-based MC code [2,3],simulating the irradiation with a 225 kVp orthovoltage X-ray beam.Virtual planar irradiations implied interposition of a comb collimatormade of W or Pb, of various thicknesses, producing a pattern ofrectangular slits of various width (from 0.1 mm to 0.5 mm) alternatedto septa, with a fixed center-to-center spacing (ctcs) of 1 mm [...]

Introduction: The FLASHlab@PITZ at DESY’s Photo Injector Test facilityexplores electron FLASH radiation therapy across a wide parameterspectrum. The startup beamline includes a 60⁰ dipole, BPMs, ICT,Faraday cup, screen stations, titanium window, experimental area, andFaraday cup in air. [...]

Introduction: FLASHlab@PITZ is a new R&D facility for radiationbiology studies (≤22 Mev, electrons) and is being setup at the PhotoInjector Test facility at DESY in Zeuthen (PITZ). It provides worldwideunique beam parameters regarding delivered dose and dose rate [1].With an average dose rate within one pulse of up to 109 Gy/s and peakdose rates up to 4 × 1013 Gy/s, PITZ is fully capable of ultra-high doserate experiments, for example the investigation of the FLASH effect.Furthermore, clinical dose rates of 0.05 Gy/s are also available at PITZ.Materials & Methods: Dosimetry at such high dose rates is a majorchallenge [...]

Introduction: Ionizing irradiation of water and DNA causes reactiveoxygen species (ROS) generation and DNA damage that togetherresults in cell proliferation inhibition. Radiation treatment with ultrahigh dose rate (UHDR) leads to lower toxicity in healthy tissue keepingthe tumor therapeutic response [...]

Introduction: The FLASHlab@PITZ at DESY’s Photo Injector Test facilityexplores electron FLASH radiation therapy across a wide parameterspectrum. The startup beamline includes a 60⁰ dipole, BPMs, ICT,Faraday cup, screen stations, titanium window, experimental area, andFaraday cup in air [...]