A Large-Acceptance Forward Angle Spectrometer (Super BigBite) is under development for the upcoming experiments in Hall A at Jefferson Lab to optimally exploit the exciting opportunities offered by ...the 12 GeV upgrade of the electron beam. The tracking of this new apparatus is based on the Gas Electron Multiplier technology, which has been chosen to optimize cost/performance, position resolution and meet the high hits rate (>1 MHz/cm
2
). In this report we present the technical features of the detector and comment on the presently achieved performance.
The lower limit of the time resolution for a positron emission tomography (PET) system has been measured for two scintillator types, LYSO:Ce and LuAG:Pr. Small dimension crystals and ultra bi-alkali ...phototubes have been used in order to increase the detected scintillation photons. Good timing resolutions of 118 ps and 223 ps FWHM have been obtained for two LYSO and two LuAG, respectively, exposed to a super(22)Na source.
Two Hamamatsu Photonics silicon photomultipliers (SiPM) with same cell size 50 x 50 mu m super(2) and different sensitive area (1 x 1 mm super(2) vs. 3 x 3 mm super(2)) have been characterized in ...charge and time by means of a 409 nm pico-laser. The time resolution was studied for the detection of few photoelectrons. The results obtained are relevant for the employment of SiPM in ring imaging Cherenkov detectors (RICH).
A new Large-Acceptance Forward Angle Spectrometer (Super BigBite) is under development at JLab/Hall A to optimally exploit the exciting opportunities offered by the 12 GeV upgrade of the electron ...beam. The tracker of this new apparatus is based on the Gas Electron Multiplier (GEM) technology, which has been chosen to optimize cost/performance, position resolution and to meet the high hit rate (> 1 MHz/cm super(2)). The first GEM detector modules, designed and built by the INFN Collaboration JLAB12, were tested at the DESY test beam facility in Hamburg, by using an electron beam with energy ranging from 2.0 to 6.0 GeV. In particular, two 40x50 cm super(2) and one 10x10 cm super(2) GEM chambers were equipped with a new implementation of the APV25 readout chip. Measurements were performed at different impact points and angles between the electron beam and the plane of the GEM chambers, with one large chamber in a solenoid magnetic field up to 500 Gauss. In this report we present the technical characteristics of the detector and comment on the presently achieved performance.
We report the design and preliminary test results of a 14C beam monitor developed for the online monitoring for radiocarbon dating. The challenge of the INFN CHNet-Lilliput experiment is to measure ...the amount of carbon in very small samples (down to a few micro-grams) with a very low concentration of radiocarbon. For this purpose, a new dedicated beam monitor for 14C ions (Energy ≃ 10 MeV) uses a silicon solid state detector made of 4 independent sectors, active area 50 × 50 mm2 and 300 μm thickness. The detector was preliminary tested in the INFN Laboratory of Bari and then installed on the final part of the Accelerator Mass Spectrometry (AMS) beam line at the INFN-LABEC Laboratory of Firenze (Italy) where sample measurements for radiocarbon dating are performed since 2004.
•Preliminary test results of a 14C beam monitor for the online monitoring for radiocarbon dating.•The challenge of the INFN CHNet-Lilliput experiment is to measure the amount of carbon in very small samples.•A new dedicated beam monitor for 14C ions (Energy ∼10 MeV) uses a silicon solid state detector made of 4 independent sectors (300μm thickness).•The detector was tested in the INFN Laboratory of Bari and then installed at the INFN-LABEC (Firenze).
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