Abstracts Brochure - 2nd International Particle Accelerator Conference

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� Main Classification 8: Applications of <strong>Accelerator</strong>s Poster Panel 124 ID: 3215 - THPS082 Design Choices of the MedAustron Nozzles and Proton Gantry based on Modeling of <strong>Particle</strong> Scattering, Marcus Palm (ATI, Wien; CERN, Geneva), Michael Benedikt (CERN, Geneva; EBG MedAustron, Wr. Neustadt), Adrian Fabich (EBG MedAustron, Wr. Neustadt) - MedAustron, the Austrian hadron therapy center is currently under construction. Irradiations will be performed using active scanning with a pencil beam. For applications where sharp lateral beam penumbras are required to spare critical organs from undesired dose exposure, an important factor is scattering in e.g. beam monitors, air and vacuum windows - particularly for low-energy proton beams. A semi-empirical scattering model has been established to evaluate beam growth due to scattering in the proton gantry and fixed beam line irradiation rooms. Major design choices for proton gantry and nozzle based on the scattering calculations are presented. Sub Classification: U01 Medical Applications Poster Panel 125 ID: 3405 - THPS091 Development of the Pulse Radiolysis System with a Supercontinuum Radiation using Photonic Crystal Fiber, Koichi Ogata, Ryosuke Betto [on leave], Yuji Hosaka [on leave], Yohei Kawauchi [on leave], Kazuyuki Sakaue [on leave], Tatsuya Suzuki [on leave], Masakazu Washio [on leave] (RISE, Tokyo), Ryunosuke Kuroda [on leave] (AIST, Tsukuba, Ibaraki), Shigeru Kashiwagi [on leave] (Tohoku University, Sendai) - In usage of radiation, it is important to study the process of chemical effects of ionizing radiation in a material. Pulse radiolysis is a method to trace these rapid initial chemical reactions by ionizing radiation. As a pump beam, we are using 5MeV electron beam produced from the S-band photo cathode RF-Gun. In nanosecond timescale pulse radiolysis, it is required the stable probe light of a broad spectrum. And especially in picosecond timescale pulse radiolysis, probe light should have short pulse width to use stroboscopic method. Therefore, in order to develop a wide range of timescale experimental system, we have been developing a Supercontinuum (SC) light as a probe light, which is generated by nonlinear optical process of short pulse IR laser in photonic crystal fiber (PCF). As a result, the SC light 37 spectrum is broad enough to use as a probe light. Then we tried to measure the absorption spectrum of hydrated electron by SC light, we successfully observed good signal-noise ratio data both nanosecond and picosecond experiment with unified pulse radiolysis system. In this conference, we will report details of these results and future prospects. Funding Agency: Work supported by JSPS Grant-in- Aid for Scientific Research (A) 10001690 Sub Classification: U02 Materials Analysis and Modification Poster Panel 126 ID: 2872 - THPS098 Neutron–physical Characteristics of the Subcritical Setup with Natural Uranium Blanket Bombarded by Deuterons with Energy 4 GeV, Maryna Artiushenko, Yuri Petrusenko, Vladimir Sotnikov, Vladimir Voronko (NSC/KIPT, Kharkov), Andrei Patapenka, Anastasiya Safronava, Igor Zhuk (JIPNR-Sosny NASB, Minsk) - An extended U/Pbassembly was irradiated with an extracted beam of 4 GeV deuterons from the Nuclotron accelerator at the JINR, Dubna, Russia. Information on the spatial distributions of neutrons in the lead target and the uranium blanket was obtained with sets of activation detectors (natPb and natU) and solid state nuclear track detectors (SSNTD). Spatial distribution of the natPb, and natU fission reaction rates in the volume of the target and blanket installation were obtained using SSNTD techniques. Activation method was used to obtain the spatial distributions of 238U(n,g), 238U(n,f) reactions rates. The procedure of combining the track counting and gammaspectrometry techniques for the determination of spectral indices is a new development. It includes gathering information from the same sample by SSNTD methods, i.e., counting the fission tracks of 238U, and also by gamma-spectrometry of 239Np production. Sets of spectral indices values (ratio of 238U(n,g) to 238U(n,f) reaction rates), representing the integral nuclear data were defined. Comparison between the experimental data and the calculations performed with the use of the computer numerical code FLUKA2008 was made. Sub Classification: U03 Transmutation and Power Generation
Poster Panel 127 ID: 2930 - THPS104 Novel Schemes for the Narrow Band Sparc THz Source using a Comb-like e-beam, Barbara Marchetti (INFN-Roma II, Roma), Concetta Ronsivalle (ENEA C.R. Frascati, Frascati (Roma)), Manuela Boscolo, Michele Castellano, Enrica Chiadroni, Massimo Ferrario, Bruno Spataro, Cristina Vaccarezza (INFN/LNF, Frascati (Roma)), Alessandro Cianchi (Università di Roma II Tor Vergata, Roma) - The development of radiation sources in the THz spectral region has become more and more interesting because of the peculiar characteristics of this radiation: it is non ionizing, it penetrates dielectrics, it is highly absorbed by polar liquids, highly reflected by metals and reveals � 38 specific "fingerprint" absorption spectra arising from fundamentals physical processes. The THz source at SPARC is an accelerator based source for research investigations (e.g. material science, biology fields). By means of e-beam manipulation technique, a longitudinal modulated beam, the so-called comb beam, can be produced at Sparc. In terms of THz sources, such e-beam distribution allows to produce high intensitiy narrow band THz radiation, whose spectrum strongly depends on the charge distribution inside the e-beam. Different linac schemes are compared. In particular, spectra obtained using the comb-beam compression through velocity bunching including a IV harmonic RF section is showed. Sub Classification: U05 Other Applications
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Abstracts Brochure - 2nd International Particle Accelerator Conference

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