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Dive into the research topics where P. Scampoli is active.

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Featured researches published by P. Scampoli.


Nature Communications | 2014

A moiré deflectometer for antimatter

S. Aghion; O. Ahlén; C. Amsler; A. Ariga; T. Ariga; A. S. Belov; K. Berggren; G. Bonomi; P. Bräunig; J. Bremer; R. S. Brusa; L. Cabaret; C. Canali; R. Caravita; F. Castelli; G. Cerchiari; S. Cialdi; D. Comparat; G. Consolati; H. Derking; S. Di Domizio; L. Di Noto; M. Doser; A. Dudarev; A. Ereditato; R. Ferragut; A. Fontana; P. Genova; M. Giammarchi; A. Gligorova

The precise measurement of forces is one way to obtain deep insight into the fundamental interactions present in nature. In the context of neutral antimatter, the gravitational interaction is of high interest, potentially revealing new forces that violate the weak equivalence principle. Here we report on a successful extension of a tool from atom optics—the moiré deflectometer—for a measurement of the acceleration of slow antiprotons. The setup consists of two identical transmission gratings and a spatially resolving emulsion detector for antiproton annihilations. Absolute referencing of the observed antimatter pattern with a photon pattern experiencing no deflection allows the direct inference of forces present. The concept is also straightforwardly applicable to antihydrogen measurements as pursued by the AEgIS collaboration. The combination of these very different techniques from high energy and atomic physics opens a very promising route to the direct detection of the gravitational acceleration of neutral antimatter.


Journal of Instrumentation | 2013

A new application of emulsions to measure the gravitational force on antihydrogen

C. Amsler; A. Ariga; T. Ariga; Saverio Braccini; C. Canali; A. Ereditato; J. Kawada; M. Kimura; I. Kreslo; C. Pistillo; P. Scampoli; J. Storey

We propose to build and operate a detector based on the emulsion film technology for the measurement of the gravitational acceleration on antimatter, to be performed by the AEgIS experiment (AD6) at CERN. The goal of AEgIS is to test the weak equivalence principle with a precision of 1% on the gravitational acceleration g by measuring the vertical position of the annihilation vertex of antihydrogen atoms after their free fall while moving horizontally in a vacuum pipe. With the emulsion technology developed at the University of Bern we propose to improve the performance of AEgIS by exploiting the superior position resolution of emulsion films over other particle detectors. The idea is to use a new type of emulsion films, especially developed for applications in vacuum, to yield a spatial resolution of the order of one micron in the measurement of the sag of the antihydrogen atoms in the gravitational field. This is an order of magnitude better than what was planned in the original AEgIS proposal.


Journal of Instrumentation | 2010

First results on proton radiography with nuclear emulsion detectors

Saverio Braccini; A. Ereditato; I. Kreslo; U. Moser; C. Pistillo; S Studer; P. Scampoli; A Coray; E Pedroni

We propose an innovative method for proton radiography based on nuclear emulsion film detectors, a technique in which images are obtained by measuring the position and the residual range of protons passing through the patients body. For this purpose, nuclear emulsion films interleaved with tissue equivalent absorbers can be used to reconstruct proton tracks with very high accuracy. This is performed through a fully automated scanning procedure employing optical microscopy, routinely used in neutrino physics experiments. Proton radiography can be used in proton therapy to obtain direct information on the average tissue density for treatment planning optimization and to perform imaging with very low dose to the patient. The first prototype of a nuclear emulsion based detector has been conceived, constructed and tested with a therapeutic proton beam. The first promising experimental results have been obtained by imaging simple phantoms.


NON-NEUTRAL PLASMA PHYSICS VIII: 10th International Workshop on Non-Neutral Plasmas | 2013

AEgIS experiment commissioning at CERN

D. Krasnický; S. Aghion; C. Amsler; A. Ariga; T. Ariga; A. S. Belov; G. Bonomi; P. Bräunig; R. S. Brusa; J. Bremer; G. Burghart; L. Cabaret; M. Caccia; C. Canali; R. Caravita; F. Castelli; G. Cerchiari; S. Cialdi; D. Comparat; G. Consolati; L. Dassa; S. Di Domizio; L. Di Noto; M. Doser; A. Dudarev; A. Ereditato; R. Ferragut; A. Fontana; P. Genova; M. Giammarchi

The AEgIS Experiment is an international collaboration based at CERN whose aim is to perform the first direct measurement of the gravitational acceleration g of antihydrogen in the gravitational field of the Earth. Cold antihydrogen will be produced with a pulsed charge exchange reaction in a cylindrical Penning trap where antiprotons will be cooled to 100mK. The cold antihydrogen will be produced in an excited Rydberg state and subsequently formed into a beam. The deflection of the antihydrogen beam will be measured by using Moire deflectometer gratings. After being approved in late 2008, AEgIS started taking data in a commissioning phase early 2012. This report presents an overview of the AEgIS experiment, describes its current status and shows the first measurements on antiproton catching and cooling in the 5 T Penning catching trap. We will also present details on the techniques needed for the 100mK antihydrogen production, such as pulsed positronium production and its excitation with lasers.


Journal of Instrumentation | 2012

A beam monitor detector based on doped silica and optical fibres

Saverio Braccini; A. Ereditato; F. Giacoppo; I. Kreslo; Konrad Pawel Nesteruk; M. Nirkko; M. Weber; P. Scampoli; Martin Neff; Sönke Pilz; Valerio Romano

A beam monitor detector prototype based on doped silica fibres coupled to optical fibres has been designed, constructed and tested, mainly for accelerators used in medical applications. Scintillation light produced by Ce and Sb doped silica fibres moving across the beam has been measured, giving information on beam position, shape and intensity. Mostly based on commercial components, the detector is easy to install, to operate and no electronic components are located near the beam. Tests have been performed with a 2 MeV proton pulsed beam at an average current of 0.8 μA. The response characteristics of Sb doped silica fibres have been studied for the first time.


International Journal of Radiation Biology | 2005

Modelled microgravity does not modify the yield of chromosome aberrations induced by high-energy protons in human lymphocytes.

Lorenzo Manti; Marco Durante; G. A. P. Cirrone; G. F. Grossi; M. Lattuada; M. Pugliese; M. G. Sabini; P. Scampoli; L. Valastro; G. Gialanella

The aim was to evaluate the effect of modelled microgravity on radiation-induced chromosome aberrations (CAs). G0 peripheral blood lymphocytes were exposed to 60 MeV protons or 250 kVp X-rays in the dose range 0 – 6 Gy, and allowed to repair DNA damage for 24 h under either normal gravity or microgravity modelled by the NASA-designed rotating-wall bioreactor. Cells were then stimulated to proliferate by phytohaemagglutinin (PHA) under normal gravity conditions and prematurely condensed chromosomes were harvested after 48 h. CAs were scored in chromosomes 1 and 2 by fluorescence in-situ hybridization. Proliferation gravisensitivity was examined by cell growth curves and by morphological evaluation of mitogen-induced activation. Cell replication rounds were monitored by bromodeoxyuridine labelling. Modelled microgravity markedly reduced PHA-mediated lymphocyte blastogenesis and cell growth. However, no significant differences between normal gravity and modelled microgravity were found in the dose – response curves for the induction of aberrant cells or total interchromosomal exchange frequency. Rotating-wall bioreactor-based microgravity reproduced space-related alterations of mitogen stimulation in human lymphocytes but did not affect the yield of CAs induced by low- linear energy transfer radiation.


Measurement Science and Technology | 2015

Low current performance of the Bern medical cyclotron down to the pA range

M. Auger; Saverio Braccini; A. Ereditato; Konrad Pawel Nesteruk; P. Scampoli

A medical cyclotron accelerating H− ions to 18 MeV is in operation at the Bern University Hospital (Inselspital). It is the commercial IBA 18/18 cyclotron equipped with a specifically conceived 6 m long external beam line ending in a separate bunker. This feature is unique for a hospital-based facility and makes it possible to conduct routine radioisotope production for PET diagnostics in parallel with multidisciplinary research activities, among which are novel particle detectors, radiation biophysics, radioprotection, radiochemistry and radiopharmacy developments. Several of these activities, such as radiobiology experiments for example, require low current beams down to the pA range, while medical cyclotrons are designed for high current operation above 10 μA. In this paper, we present the first results on the low current performance of a PET medical cyclotron obtained by ion source, radio-frequency and main coil tuning. With this method, stable beam currents down to () pA were obtained and measured with a high-sensitivity Faraday cup located at the end of the beam transport line.


International Journal of Modern Physics: Conference Series | 2014

Measuring

D. Krasnický; S. Aghion; O. Ahlén; C. Amsler; A. Ariga; T. Ariga; A. S. Belov; K. Berggren; G. Bonomi; P. Bräunig; J. Bremer; R. S. Brusa; L. Cabaret; C. Canali; R. Caravita; F. Castelli; G. Cerchiari; S. Cialdi; D. Comparat; G. Consolati; H. Derking; S. Di Domizio; L. Di Noto; M. Doser; A. Dudarev; A. Ereditato; R. Ferragut; A. Fontana; P. Genova; M. Giammarchi

experiments main goal is to measure the local gravitational acceleration of antihydrogen and thus perform a direct test of the weak equivalence principle with antimatter. In the first phase of the experiment the aim is to measure with 1% relative precision. This paper presents the antihydrogen production method and a description of some components of the experiment, which are necessary for the gravity measurement. Current status of the experimental apparatus is presented and recent commissioning results with antiprotons are outlined. In conclusion we discuss the short-term goals of the collaboration that will pave the way for the first gravity measurement in the near future.


2nd International Workshop on Antimatter and Gravity (WAG 2013) | 2014

\bar{g}

C. Amsler; A. Ariga; Tomoko Ariga; A. Ereditato; J. Kawada; M. Kimura; C. Pistillo; P. Scampoli; J. Storey

experiments main goal is to measure the local gravitational acceleration of antihydrogen and thus perform a direct test of the weak equivalence principle with antimatter. In the first phase of the experiment the aim is to measure with 1% relative precision. This paper presents the antihydrogen production method and a description of some components of the experiment, which are necessary for the gravity measurement. Current status of the experimental apparatus is presented and recent commissioning results with antiprotons are outlined. In conclusion we discuss the short-term goals of the collaboration that will pave the way for the first gravity measurement in the near future.


Journal of Instrumentation | 2016

with

T. Ariga; A. Ariga; K. Kuwabara; K. Morishima; Masaki Moto; Akira Nishio; P. Scampoli; Mykhailo Vladymyrov

Photographic emulsion is a particle tracking device which features the best spatial resolution among particle detectors. For certain applications, for example muon radiography, large-scale detectors are required. Therefore, a huge surface has to be analyzed by means of automated optical microscopes. An improvement of the readout speed is then a crucial point to make these applications possible and the availability of a new type of photographic emulsions featuring crystals of larger size is a way to pursue this program. This would allow a lower magnification for the microscopes, a consequent larger field of view resulting in a faster data analysis. In this framework, we developed new kinds of emulsion detectors with a crystal size of 600-1000 nm, namely 3-5 times larger than conventional ones, allowing a 25 times faster data readout. The new photographic emulsions have shown a sufficient sensitivity and a good signal to noise ratio. The proposed development opens the way to future large-scale applications of the technology, e.g. 3D imaging of glacier bedrocks or future neutrino experiments.

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R. Ferragut

Instituto Politécnico Nacional

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G. Bonomi

University of Brescia

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S. Aghion

Instituto Politécnico Nacional

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