Author: Picardi, L.
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TUPRO091 Simple Characterization Method of Small High Gradient Permanent Magnet Quadrupoles 1250
 
  • C. Ronsivalle, L. Picardi, M. Vadrucci
    ENEA C.R. Frascati, Frascati (Roma), Italy
  • F. Ambrosini
    URLS, Rome, Italy
 
  The application of quadrupoles with high or ultra-high gradient and small apertures requires a precise control over harmonic components of the field. A simple, fast, low cost measurement method on small size PMQs (Permanent Magnet Quadrupoles) is described. It is based on the same principle of the familiar "rotating coil technique", but in this case, profiting of the small dimensions of the PMQ, it consists in rotating the PMQ itself instead of the coil. In such way a gain on accuracy and measure time is obtained. It has been applied to characterize a set of commercial PMQs with a gradient around 200 T/m and an internal radius of 3.5 mm to be mounted in a SCDTL (Side Coupled Drift Tube Linac) structure for the acceleration of a proton beam from 7 to 12 MeV. This structure has been developed in the framework of the Italian TOP-IMPLART (Intensity Modulated Proton Linear Accelerator for Radiotherapy) Project  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO091  
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TUPRI099 A Proton Therapy Test Facility: the Radiation Protection Design 1805
 
  • S. Sandri, L. Picardi, C. Poggi, C. Ronsivalle
    ENEA C.R. Frascati, Frascati (Roma), Italy
  • G. Ottaviano
    ENEA-Bologna, Bologna, Italy
 
  A proton therapy test facility with a beam current lower than 10 nA in average, and an energy up to 85 MeV, has to be sited at the Frascati ENEA Research Center, in Italy. The accelerator is composed by a sequence of linear sections. From the radiation protection point of view the source of radiation for this facility is almost completely located at the final target. Physical and geometrical models of the device have been developed and implemented into a radiation transport computer code based on Monte Carlo method. The main scope is the assessment of the dose rates around the radiation source for supporting the safety analysis. For the assessment was used the FLUKA (FLUktuierende KAskade) computer code. A general purpose tool for the calculation of particle transport and interaction with matter, covering an extended range of applications including proton beam analysis. The models implemented into the code are described and the results are presented. The calculated dose rates are reported at different distances from the target. Considerations about personnel safety are issued and the shielding requirements are anticipated.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRI099  
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WEPRO086 Experimental Activity in the ENEA-Frascati Irradiation Facility with 3-7 MeV Protons 2156
 
  • M. Vadrucci, A. Ampollini, F. Bonfigli, M.C. Carpanese, F. Marracino, R.M. Montereali, P. Nenzi, L. Picardi, M. Piccinini, C. Ronsivalle, V. Surrenti, M.A. Vincenti
    ENEA C.R. Frascati, Frascati (Roma), Italy
  • F. Ambrosini
    URLS, Rome, Italy
  • M. Balduzzi, C. Marino, C. Snels
    ENEA Casaccia, Roma, Italy
  • M. Balucani, A. Klyshko
    University of Rome "La Sapienza", Rome, Italy
  • C. De Angelis, G. Esposito, M.A. Tabocchini
    ISS, Rome, Italy
 
  A variable energy (3-7 MeV) and pulsed current (0.1 – 100 μA) proton beam has been made available for different applications (radiobiology experiments, detectors development, material studies) in an irradiation facility at ENEA-Frascati based on the 7 MeV injector of the protontherapy linac under realization in the framework of the TOP-IMPLART Project. It is a 425 MHz linear accelerator consisting in a 3 MeV RFQ followed by a DTL up to 7 MeV (PL-7 ACCSYS-HITACHI model) followed by an horizontal and a vertical beam transport line. The latter one is particularly suitable for radiobiology in vitro studies allowing to irradiate besides cell monolayes also cell growing in suspension culture. The paper describes the facility and the recent results of the experimental activity.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO086  
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THPME016 Experimental Results on SCDTL Structures for Protons 3247
 
  • L. Picardi, A. Ampollini, G. Bazzano, P. Nenzi, C. Ronsivalle, V. Surrenti, M. Vadrucci
    ENEA C.R. Frascati, Frascati (Roma), Italy
  • F. Ambrosini
    URLS, Rome, Italy
 
  The medium-energy section of the proton linear accelerator for radiotherapy under realization in the framework of the TOP-IMPLART Project consists in a high frequency 7-35 MeV SCDTL (Side Coupled Drift Tube Linac) structure. The structure, made of 4 modules supplied by one klystron, has been completely designed. The first module up to 11.6 MeV has been built and is under commissioning at ENEA-Frascati and the second and third modules are under realization. The paper describes the system and presents the main results of the experimental activity on this part of the accelerator.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME016  
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THPME017 Electromechanical Analysis of SCDTL Structures 3250
 
  • M. Ciambrella, F. Cardelli, M. Migliorati, A. Mostacci, L. Palumbo
    URLS, Rome, Italy
  • L. Ficcadenti, V. Pettinacci
    INFN-Roma, Roma, Italy
  • L. Picardi, C. Ronsivalle
    ENEA C.R. Frascati, Frascati (Roma), Italy
 
  The Side Coupled Drift Tube Linac (SCDTL) is a 3 GHz accelerating structure for proton therapy linac designed for TOP-IMPLART, an Intensity Modulated Proton Linear Accelerator for Radio-Therapy. The structure is made up of short DTL accelerating tanks for low current proton beams, coupled by side coupling cavities. The purpose of this paper is to report on the analysis of electromagnetic and the thermo-mechanical behavior for the SCDTL structure. The 3D electromagnetic analysis is used to derive the power dissipation on the structure; then one can infer the temperature distribution and deformation field in order to eventually evaluate their feedback on the electromagnetic properties of the structure as, for instance, the cavity resonant frequency shift. Such a "multi-physics'' analysis has been performed for different supporting stem geometries in order to optimize the shunt impedance and the R/Q for SCDTL cavities.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME017  
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