Search results for: D. Lietti

Items from 1 to 20 out of 28 results

article

Splitting of a high-energy positively-charged particle beam with a bent crystal

L. Bandiera, I.V. Kirillin, E. Bagli, A. Berra, more

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions... > 2017 > 402 > C > 296-299

The possibility of high-energy positively-charged particle beam splitting by means of a short bent axially oriented silicon crystal was recently reported in an experiment carried out at CERN SPS H8 extracted line with a 400GeV/c proton beam. Here, we investigate more deeply such a possibility focusing our attention on the efficiency of beam splitting and its modulation for different crystal-to-beam...

article

Relaxation of axially confined 400 GeV/c protons to planar channeling in a bent crystal

L. Bandiera, A. Mazzolari, E. Bagli, G. Germogli, more

The European Physical Journal C > 2016 > 76 > 2 > 1-6

An investigation on the mechanism of relaxation of axially confined 400 GeV/c protons to planar channeling in a bent crystal was carried out at the extracted line H8 from CERN Super Proton Synchrotron. The experimental results were critically compared to computer simulations, showing a good agreement. We identified a necessary condition for the exploitation of axial confinement or its relaxation for...

article

Study of the readout configuration of the GAMMA-400 silicon tracker sensors

A. Berra, V. Bonvicini, D. Lietti, M. Prest, more

Nuclear Instruments and Methods in Physics Research Section A: Accelerators,... > 2015 > 798 > C > 80-87

The GAMMA-400 satellite is an upcoming international space mission designed to detect gamma and cosmic rays in a broad energy range up to 3TeV, with an excellent angular and energy resolution. The present design foresees a 10 layers Si–W tracker formed by single sided silicon sensors with 80μm strip pitch, with a readout pitch of 240μm; the sensors are arranged in four towers, each one with an area...

article

A SiPM based real time dosimeter for radiotherapic beams

A. Berra, V. Conti, D. Lietti, L. Milan, more

Nuclear Instruments and Methods in Physics Research Section A: Accelerators,... > 2015 > 773 > C > 72-80

This paper describes the development of a scintillator dosimeter prototype for radiotherapic applications based on plastic scintillating fibers readout by Silicon PhotoMultipliers. The dosimeter, whose probes are water equivalent, could be used for quality control measurements, beam characterization and in vivo dosimetry, allowing a real time measurement of the dose spatial distribution. This paper...

article

LYSO crystal calorimeter readout with silicon photomultipliers

A. Berra, V. Bonvicini, C. Cecchi, S. Germani, more

Nuclear Inst. and Methods in Physics Research, A > 2014 > 763 > Complete > 248-254

Large area Silicon PhotoMultipliers (SiPMs) are the new frontier of the development of readout systems for scintillating detectors. A SiPM consists of a matrix of parallel-connected silicon micropixels operating in limited Geiger–Muller avalanche mode, and thus working as independent photon counters with a very high gain (~10⁶). This contribution presents the performance in terms of linearity and...

article

Silicon photomultiplier characterization with a scintillating bar detector

A. Berra, V. Bonvicini, A. Ferri, D. Lietti, more

Nuclear Inst. and Methods in Physics Research, A > 2014 > 750 > Complete > 38-42

This paper describes a setup dedicated to the test of silicon photomultipliers interfaced to a scintillating bar detector. The main item of the setup is a scintillator bar tracker made of extruded bars, readout with wavelength shifter fibers: multiple configurations in terms of number of fibers and readout bar sides are available to test different readout approaches. This setup has been used to test...

article

Characterization of a DAQ system for the readout of a SiPM based shashlik calorimeter

A. Berra, V. Bonvicini, L. Bosisio, D. Lietti, more

Nuclear Instruments and Methods in Physics Research Section A: Accelerators,... > 2014 > 735 > C > 422-430

Silicon PhotoMultipliers (SiPMs) are a recently developed type of silicon photodetector characterized by high gain and insensitivity to magnetic fields, which make them a suitable detector for the next generation high energy and space physics experiments. This paper presents the performance of a readout system for SiPMs based on the MAROC3 ASIC. The ASIC consists of 64 channels working in parallel,...

article

Experimental evidence of planar channeling in a periodically bent crystal

E. Bagli, L. Bandiera, V. Bellucci, A. Berra, more

The European Physical Journal C > 2014 > 74 > 10 > 1-7

The usage of a crystalline undulator (CU) has been identified as a promising solution for generating powerful and monochromatic $$\gamma $$ γ -rays. A CU was fabricated at Sensors and Semiconductors Lab (SSL) through the grooving method, i.e., by the manufacturing of a series of periodical grooves on the major surfaces of a crystal. The CU was extensively characterized both morphologically...

article

Steering efficiency of a ultrarelativistic proton beam in a thin bent crystal

E. Bagli, L. Bandiera, V. Guidi, A. Mazzolari, more

The European Physical Journal C > 2014 > 74 > 1 > 1-7

Crystals with small thickness along the beam exhibit top performance for steering particle beams through planar channeling. For such crystals, the effect of nuclear dechanneling plays an important role because it affects their efficiency. We addressed the problem through experimental work carried out with 400 GeV/c protons at fixed-target facilities of CERN-SPS. The dependence of efficiency vs. curvature...

article

Latest results of the R&D on CMOS MAPS for the Layer0 of the SuperB SVT

G. Balestri, G. Batignani, G. Beck, A. Bernardelli, more

Nuclear Inst. and Methods in Physics Research, A > 2013 > 732 > Complete > 484-487

Physics and high background conditions set very challenging requirements on readout speed, material budget and resolution for the innermost layer of the SuperB Silicon Vertex Tracker operated at the full luminosity. Monolithic Active Pixel Sensors (MAPS) are very appealing in this application since the thin sensitive region allows grinding the substrate to tens of microns. Deep N-Well MAPS, developed...

article

A SiPM based readout system for lead tungstate crystals

A. Berra, V. Bonvicini, L. Bosisio, D. Lietti, more

Nuclear Inst. and Methods in Physics Research, A > 2013 > 732 > Complete > 380-383

In recent years Silicon PhotoMultipliers (SiPMs) have been proposed as a new type of readout system for scintillating detectors in many experiments. SiPMs consist of a matrix of parallel-connected silicon micro-pixels, which are independent photon counters working in limited Geiger mode with very high gain (∼106). This contribution presents the use of SiPMs (manufactured by FBK-irst) as the readout...

article

Advances in the development of pixel detector for the SuperB Silicon Vertex Tracker

E. Paoloni, D. Comotti, M. Manghisoni, V. Re, more

Nuclear Inst. and Methods in Physics Research, A > 2013 > 731 > Complete > 25-30

The latest advances in the design and characterization of several pixel sensors developed to satisfy the very demanding requirements of the innermost layer of the SuperB Silicon Vertex Tracker will be presented in this paper. The SuperB machine is an electron positron collider operating at the ϒ(4S) peak to be built in the very near future by the Cabibbo Lab consortium. A pixel detector based on extremely...

article

A microstrip silicon telescope for high performance particle tracking

D. Lietti, A. Berra, M. Prest, E. Vallazza

Nuclear Inst. and Methods in Physics Research, A > 2013 > 729 > Complete > 527-536

Bent crystals are thin silicon/germanium devices that act as a bulk dipole magnet and thus are able to deflect relativistic charged particle beams with high efficiency (up to 98%). To study their behavior on extracted beamlines in terms of deflection capability and efficiency, a fast and high position resolution telescope is needed such as the INSULAB telescope.It consists in several modules equipped...

article

On the radiation accompanying volume reflection

L. Bandiera, E. Bagli, A. Berra, D. Bolognini, more

Nuclear Inst. and Methods in Physics Research, B > 2013 > 309 > Complete > 135-140

The electromagnetic radiation emitted by 120GeV/c volume-reflected electrons in a bent silicon crystal has been investigated at CERN SPS-H4 beamline. The trajectories of electrons crossing a silicon strip-like crystal have been reconstructed through a telescope system based on high precision micro-strip detectors. The experimental setup was also equipped with a spectrometer and an electromagnetic...

article

The front-end chip of the SuperB SVT detector

F. Giorgi, D. Comotti, M. Manghisoni, V. Re, more

Nuclear Inst. and Methods in Physics Research, A > 2013 > 718 > Complete > 180-183

The asymmetric e+e− collider SuperB is designed to deliver a high luminosity, greater than 1036cm−2s−1, with moderate beam currents and a reduced center of mass boost with respect to earlier B-Factories. The innermost detector is the Silicon Vertex Tracker which is made of 5 layers of double sided silicon strip sensors plus a layer 0, that can be equipped with short striplets detectors in a first...

article

Recent developments on CMOS MAPS for the SuperB Silicon Vertex Tracker

G. Rizzo, D. Comott, M. Manghisoni, V. Re, more

Nuclear Inst. and Methods in Physics Research, A > 2013 > 718 > Complete > 283-287

In the design of the Silicon Vertex Tracker for the high luminosity SuperB collider, very challenging requirements are set by physics and background conditions on its innermost Layer0: small radius (about 1.5cm), resolution of 10–15μm in both coordinates, low material budget <1%X0, and the ability to withstand a background hit rate of several tens of MHz/cm2. Thanks to an intense R&D program...

article

SiPM based readout system for PbWO4 crystals

A. Berra, D. Bolognini, S. Bonfanti, V. Bonvicini, more

Nuclear Inst. and Methods in Physics Research, A > 2013 > 718 > Complete > 63-65

Silicon PhotoMultipliers (SiPMs) consist of a matrix of small passively quenched silicon avalanche photodiodes operated in limited Geiger-mode (GM-APDs) and read out in parallel from a common output node. Each pixel (with a typical size in the 20–100μm range) gives the same current response when hit by a photon; the SiPM output signal is the sum of the signals of all the pixels, which depends on the...

article

Beam test results for the SuperB-SVT thin striplet detector

L. Fabbri, D. Comotti, M. Manghisoni, V. Re, more

Nuclear Inst. and Methods in Physics Research, A > 2013 > 718 > Complete > 314-317

The baseline detector option for the first layer of the SuperB Silicon Vertex Tracker (SVT) is a high resistivity double-sided silicon device with short strips (striplets) at 45° angle to the detector's edge. A prototype was tested with a 120GeV/c pion beam in September 2011 at the SPS-H6 test-beam line at CERN. In this paper studies on efficiency, resolution and cluster size are reported.

article

Silicon photomultipliers for scintillating trackers

S. Rabaioli, A. Berra, D. Bolognini, V. Bonvicini, more

Nuclear Inst. and Methods in Physics Research, A > 2012 > 695 > Complete > 261-264

In recent years, silicon photomultipliers (SiPMs) have been proposed as a new kind of readout device for scintillating detectors in many experiments. A SiPM consists of a matrix of parallel-connected pixels, which are independent photon counters working in Geiger mode with very high gain (∼106). This contribution presents the use of an array of eight SiPMs (manufactured by FBK-irst) for the readout...

article

Radiation emission phenomena in bent silicon crystals: Theoretical and experimental studies with 120GeV/c positrons

D. Lietti, E. Bagli, S. Baricordi, A. Berra, more

Nuclear Inst. and Methods in Physics Research, B > 2012 > 283 > Complete > 84-92

The radiation emission phenomena in bent silicon crystals have been thoroughly investigated at the CERN SPS-H4 beamline. The incoming and outgoing trajectories of charged particles impinging on a silicon strip crystal have been reconstructed by high precision silicon microstrip detectors. A spectrometer method has been exploited to measure the radiation emission spectra both in volume reflection and...

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Search results for: D. Lietti

Splitting of a high-energy positively-charged particle beam with a bent crystal

Relaxation of axially confined 400 GeV/c protons to planar channeling in a bent crystal

Study of the readout configuration of the GAMMA-400 silicon tracker sensors

A SiPM based real time dosimeter for radiotherapic beams

LYSO crystal calorimeter readout with silicon photomultipliers

Silicon photomultiplier characterization with a scintillating bar detector

Characterization of a DAQ system for the readout of a SiPM based shashlik calorimeter

Experimental evidence of planar channeling in a periodically bent crystal

Steering efficiency of a ultrarelativistic proton beam in a thin bent crystal

Latest results of the R&D on CMOS MAPS for the Layer0 of the SuperB SVT

A SiPM based readout system for lead tungstate crystals

Advances in the development of pixel detector for the SuperB Silicon Vertex Tracker

A microstrip silicon telescope for high performance particle tracking

On the radiation accompanying volume reflection

The front-end chip of the SuperB SVT detector

Recent developments on CMOS MAPS for the SuperB Silicon Vertex Tracker

SiPM based readout system for PbWO4 crystals

Beam test results for the SuperB-SVT thin striplet detector

Silicon photomultipliers for scintillating trackers

Radiation emission phenomena in bent silicon crystals: Theoretical and experimental studies with 120GeV/c positrons

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