1,720,974 research outputs found
Superconductive Performance of the Deposited High-β and Tested Medium-β QWR Cavities of the ALPI Linac
No full text8 high-β Nb/Cu superconductive QWR cavities should be
coated for the ALPI upgrade in the framework of the SPES
facility. The QWR cavities should require specific
superconductive performance to be assembled in the ALPI
linac.
RF test cold measurements are used for evaluation of the
coated Nb/Cu quality. Meanwhile, verification of the QWRs
superconductive properties, which are currently used in the
ALPI on-line activity, is also made with RF measurements.
Methodology and results of the sputtered QWRs RF
measurements will be described in this paper. In particular,
cold test results of the ALPI cryostat 7 medium-β QWR
cavities will be mentioned
Sputtering of Nb onto Cu QWR Plates for the ALPI Upgrade in the framework of SPES Facility
No full textThe ALPI linear accelerator, as part of the SPES facility,
requires the upgrade for the increasing of the energy,
transmission and reliability of the accelerator [1]. One of the
main parts of the ALPI upgrade is the installation of two
additional cryostats in the high-β region of the accelerator
[2].
8 high-β Nb/Cu QWR cavities and 8 Nb/Cu plates should
be produced for the upgrade of the ALPI linac. The
technology of the plates production for the QWR cavities is
extremely important. The quality of the produced Nb/Cu
QWR plates has a direct influence onto the cryogenic
performance of the cavity-plate systems, which will be
installed in the ALPI linac during the ALPI Upgrade
Production and Measurement at Low Temperature of High-β 160 MHz Nb/Cu QWR Superconductive Cavities for ALPI Upgrade in the framework of SPES Project
No full textDesign of a Universal Dissolution System for Solid Cyclotron Targets
No full textCyclotron radionuclides production based upon solid
targets irradiations have become increasingly significant in
recent years, due to an always growing demand for
radiometals, such as 68Ga, 89Zr, 43/47Sc, 52/54Mn. This request
has dived the focus on solid targets management, where the
first fundamental step of the radiochemical processing
procedure is the target dissolution, currently generally
performed with home-made modules separated from the
next purification/radiolabeling modules.
The aim of the present work was therefore to integrate the
dissolution and purification step on automatic commercial
cassette-based synthesis modules, for a complete target
processing and radiopharmaceutical synthesis performed in
a single module. This work was performed in the framework
of the ongoing METRICS project (Multimodal pET/mRI
imaging with Cyclotron-produced 51/52Mn iSotopes) in
collaboration with the Sacro Cuore Don Calabria Hospital
Radiopharmacy, within LARAMED (LAboratory of
RAdioisotopes for MEDicine) research program running at
LNL-INF
Production and Cryostat Measurements of the high-β Nb/Cu QWR cavities for the ALPI Upgrade of the SPES Facility
No full textThe ALPI linear accelerator, as part of the SPES facility,
should be upgraded. The main goal of the ALPI upgrade is
increasing the ALPI energy to 10 MeV/A. In order to
proceed the upgrade, two additional cryostats should be
implemented in ALPI linac high-β section.
In the framework of the ALPI Upgrade for the SPES
facility production and cryostat measurements of the Nb/Cu,
high-β QWR cavities was continued
INTEFF_TOTEM Project: magneTron sputtering cyclOtron TargEt Manufacturing
No full textINTEFF_TOTEM is a Proof-of-Concept project in the
framework of “Innovazione tecnologica dalla fisica
fondamentale” (INTEFF) program promoted by INFN
Technology Transfer Committee (CNTT). This project is
funded by the Ministry of Economic Development (MISE)
for a period of 18 months and started on February 2021.
The project aims to enhance the INFN patent
no. WO 2019/053570 “Method for obtaining a solid target
for radiopharmaceuticals production”, developed within the
framework of the LARAMED project at LNL. A
technological R&D program to improve the deposition
efficiency of some materials (e.g., Cr, ZnO) on different
substrates (metal and non-metal) with Magnetron Sputtering
(MS) technique is planned. The goal is to limit, as much as
technically achievable, the losses of the starting material,
thus making this technique also attractive for the expensive
isotopically enriched materials, typically used to
manufacture cyclotron solid targets for the production of
medical radionuclides. The current estimated Technology
Readiness Level (TRL) of this patent is 4. At the end of the
project, to evaluate the developed technology, some targets
will be irradiated with the proton beam of the medical
cyclotron available at the S. Cuore Don Calabria Hospital
(SCDCH) in Negrar, (VR). With such a planned
improvement, we expect to achieve a TRL of 6. Moreover,
a technological development of another INFN patent held
by LARAMED group (no. WO 2019/220224 A1, “A
method and a target for the production of 67Cu”) is strictly
related to this project. The manufacturing of the first step
towards the realization of a ZnO multilayer target for 67Cu
production with a high energy cyclotron (e.g., the BEST 70p
at LNL) is foreseen using both MS and Spark Plasma
Sintering (SPS) techniques. The INTEFF_TOTEM project
is carried out in the framework of the LARAMED target
development activities [1] and in collaboration with the
Servizio Tecnologia delle Superfici e Superconduttività at
the LNL
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
LARAMED Facility Status Report
No full textAlbeit the unexpected pandemic situation due to COVID19 has severely limited the working activities at LNL since
March 2020 for the rest of year, advances in setting up the
new LARAMED research facility, as well as the installation
of plants dedicated to related laboratories, have anyway
continued, although at a lower swiftness, following the
scheduled program. The LARAMED (LAboratory of
RAdioisotopes for MEDicine) facility indeed aims at
becoming an international research center, now being
established at LNL in the framework of SPES project, which
will be dedicated not only to perform fundamental nuclear
physics studies but also to seek for innovative applications
of nuclear physics to medicine [1]. The LARAMED facility,
will make use of the high-performance BEST 70p proton
cyclotron (35-70 MeV, up to 750 μA) already installed and
commissioned in the central underground vault of SPES
building, to focus research on novel radionuclides that could
play a key role in improving approaches in patients'
treatment and clinical research purposes. Moreover, to seek
alternative, accelerator-driven, nuclear reaction routes, for
both conventional and novel radionuclides currently
unavailable, by exploring new routes with dedicated nuclear
cross section measurements [2]. In parallel with the
construction of the research infrastructure (including
irradiation bunkers as well as radiochemistry and targets
production laboratories with dedicated equipment), which
has reached a good level of completion but anyway yet to
become fully operational, the LARAMED team is being
involved since years (in the framework of INFN
CSN3/CSN5-funded experimental programs) in different
cyclotron-driven production research lines of either
conventional or emerging radionuclides, as well as in R&D
on related technological aspects. Details on both the past
activities carried by the LARAMED group and the status of
current research lines, may be found, either in former
editions of Annual Report, or in other contributions
submitted to this Annual Report. What follows is a concise
update report on the achievements held in the last year about
the construction of primary infrastructure
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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