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RISS 인기검색어
- 검색키워드
- 저자 : A. Palmieri (검색결과 3 건)
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Design Study of a Re-bunching RFQ for the SPES Project
신승욱,A. Palmieri,M. Comunian,F. Grespan,채종서 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.64 No.9
An upgrade to the 2nd generation of the selective production of exotic species (SPES) to produce aradioactive ion beam (RIB) has been studied at the istituto nazionale di fisica nucleare − laboratorynazionali di Legnaro (INFN-LNL). Due to the long distance between the isotope separator online(ISOL) facility and the superconducting quarter wave resonator (QWR) cavity acceleratorelineare per ioni (ALPI), a new re-buncher cavity must be introduced to maintain the high beamquality during the beam transport. A particular radio frequency quadrupole (RFQ) structure hasbeen suggested to meet the requirements of this project. A window-type RFQ, which has a highmode separation, less power dissipation and compact size compared to the conventional normal4-vane RFQ, has been introduced. The RF design has been studied considering the requirementsof the re-bunching machine for high figures of merit such as a proper operation frequency, a highshunt impedance, a high quality factor, a low power dissipation, etc. A sensitivity analysis of thefabrication and the misalignment error has been conducted. A micro-movement slug tuner has beenintroduced to compensate for the frequency variations that may occur due to the beam loading, thethermal instability, the microphonic effect, etc.
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Effects of spin inaccuracy on PMD reduction in spun fibers
Galtarossa, A.,Jung, Yongmin,Kim, M.J.,Lee, B.H.,Oh, Kyunghwan,Paek, Un-Chul,Palmieri, L.,Pizzinat, A.,Schenato, L. IEEE 2005 Journal of lightwave technology Vol.23 No.12
Spinning a fiber is the most viable and used technique to reduce polarization mode dispersion (PMD). Many papers have shown that by properly tuning the spin parameters, the differential group delay (DGD) of spun fibers can be greatly reduced. However, the precision with which these optimal profiles are practically implemented may be a problem. In this paper, we perform a statistical analysis of the effects that spin inaccuracy may have on fiber PMD, quantifying how the random uncertainty on spin parameters impairs the DGD. Some preliminary experimental results about spin-induced PMD reduction are also reported.
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How to Develop the Periphery?: The Regional Integration Case of Basso-Ferrarese in Italy
( N. Melloni ),( G. Palmieri ),( A. Soci ) 세종대학교 경제통합연구소(구 세종대학교 국제경제연구소) 2011 Journal of Economic Integration Vol.26 No.3
This paper-a piece of the research output of the EU-funded project TERA-investigates the dynamics of development in the area of Basso Ferrarese, in Italy. The area is a relatively underdeveloped zone located in the otherwise wealthy Emilia Romagna. The first part of the paper identifies some area-specific factors affecting the poor economic performances of Basso-Ferrarese. In the second part, on the base of our findings, we run several CGE simulations focussing mainly on the potential impact of productivity gains. Finally, we discuss the policy implications of our results suggesting that investment in tourism and environmental and cultural heritage may allow for a more comprehensive path of development. Industrial development through productivity increase will have some positive effects which, however, will be mainly concentrated in relatively small areas.
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