The FERMI@Elettra free electron laser (FEL) user facility is currently under construction at the Sincrotrone Trieste laboratory in Trieste (Italy). It will cover the wavelength range from 100 to about 5 nm in the fundamental and 3 or 1 nm using the third harmonic. We report the layout of the photon beam diagnostics section, the radiation transport system to the experimental area, and the photon beam distribution system. Due to the peculiar characteristics of the emitted FEL radiation (high peak power, short pulse length, and statistical variation of the emitted intensity and distribution), the realization of the diagnostics system is particularly challenging. The end users are interested in parameters such as the radiation pulse intensity and spectral distribution, as well as in the possibility to attenuate the intensity. In order to accomplish these tasks, a photon analysis, delivery, and reduction system is now under development and construction and is presented here. This system will work on-line producing pulse-resolved information and will let users keep track of the photon beam parameters during the experiments.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1063/1.3262502 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Dielectric-Free Molybdenum Disulfide Transistors with In-Plane Gates.
ACS Appl Mater Interfaces
March 2025
Graduate Institute of Electronics Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
In this work, we realize bilayer molybdenum disulfide (MoS) transistors with in-plane gates on sapphire substrates. Through sequential transferring of MoS, e-beam lithography, and metal lift-off, a device with channel width/length of 500:400 nm is fabricated. With a 250 nm separation between the in-plane gate and MoS channel, a drain current as high as 37 μA with a clear saturation region is observed.
View Article and Find Full Text PDFAn In-Plane Single-Photon Emitter Combining a Triangular Split-Ring Micro-Optical Resonator and a Colloidal Quantum Dot.
Nanomaterials (Basel)
February 2025
Graduate School of Engineering Science, Yokohama National University, Yokohama 240-8501, Japan.
We propose a simple and innovative configuration consisting of a quantum dot and micro-optical resonator that emits single photons with good directionality in a plane parallel to the substrate. In this device, a single quantum dot is placed as a light source between the slits of a triangular split-ring micro-optical resonator (SRR) supported in an optical polymer film with an air-bridge structure. Although most of the previous single photon emitters in solid-state devices emitted photons upward from the substrate, operation simulations confirmed that this configuration realizes lateral light emission in narrow regions above, below, left, and right in the optical polymer film, despite the absence of a light confinement structure such as an optical waveguide.
View Article and Find Full Text PDFAdaptive calibration of Gafchromic EBT3 film using generalized additive neural networks.
Sci Rep
March 2025
Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Sciences and Technology, Kaohsiung, 80778, Taiwan, ROC.
In radiation therapy, precise dose distribution is essential for minimizing damage to normal tissues. Gafchromic EBT3 film is widely used to assure the quality of two-dimensional dosimetry but requires frequent recalibrations due to changes in sensitivity over time. This study presents a new calibration method using a Keras-based generalized additive neural network (GANN) to address film aging.
View Article and Find Full Text PDFApplication of Photon-Derived Worst-Case Robustness Criteria to Proton Therapy Planning.
Int J Part Ther
March 2025
Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, AL 35233, USA.
Purpose: Robustness evaluation is critical for proton beam therapy (PBT) planning, but ideal robustness criteria are not clearly defined. Here, we compared robustness of PBT plans to published intensity-modulated radiation therapy (IMRT)-derived clinical target volume (CTV) robustness benchmarks and assessed the dosimetric impact of meeting IMRT-derived benchmarks on adjacent organs at risk.
Patients And Methods: Patients receiving PBT to 70 GyE in 28 fractions to the prostate alone from 2021 to 2022 at our institution were evaluated.
Induction chemotherapy and concurrent chemoradiotherapy with cisplatin for T4 nasoethmoidal squamous cell carcinoma: The value of paclitaxel, carboplatin and cetuximab (PCE).
Oral Oncol
March 2025
Department of Head and Neck Medical Oncology, National Cancer Center Hospital East, Kashiwa, Japan. Electronic address:
Background: Locally advanced nasoethmoidal squamous cell carcinoma (SCC) is rare and often unsuitable for surgical resection. Data on the potential clinical benefits of combining induction chemotherapy (IC) and sequential definitive chemoradiotherapy for this condition is limited.
Methods: We retrospectively investigated T4 nasoethmoidal SCC patients who underwent proton or photon chemoradiotherapy with curative intent at the National Cancer Center Hospital East between April 2014 and May 2022.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!