Time of flight identification with FAZIA

S. Valdré (1) , G. Poggi (1) , A. Buccola (1) , G. Casini (1) , N. Le Neindre (2) , R. Alba (3) , S. Barlini (1) , M. Bini (1) , A. Boiano (4) , Eric Bonnet (5) , B. Borderie (6) , R. Bougault (2) , G. Brulin (6) , M. Bruno (7) , A. Camaiani (1) , A. Chbihi (8) , C. Ciampi , M. Cicerchia (9) , M. Cinausero (10) , D. Dell'Aquila (11) , J.A. Dueñas (12) , D. Fabris (13) , J.D. Frankland (8) , C. Frosin (1) , E. Galichet (14, 15) , F. Gramegna (10) , D. Gruyer (2) , M. Henri (2) , A. Kordyasz (16) , T. Kozik (17) , I. Lombardo (3) , O. Lopez (2) , C. Maiolino (3) , G. Mantovani (9) , T. Marchi (10) , L. Morelli (8) , A. Olmi (1) , A. Ordine (4) , P. Ottanelli (1) , M. Pârlog (6) , G. Pasquali (1) , G. Pastore (1) , S. Piantelli (1) , D. Santonocito , C. Soulet (6) , A.A. Stefanini (1) , G. Tortone (4) , S. Upadhyaya (17) , G. Verde (3) , E. Vient (2) , M. Vigilante (4)

1 INFN, Sezione di Firenze - Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
2 LPCC - Laboratoire de physique corpusculaire de Caen
3 INFN - Istituto Nazionale di Fisica Nucleare, Sezione di Catania
4 INFN, Sezione di Napoli - Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
5 SUBATECH - Laboratoire de physique subatomique et des technologies associées
6 IPNO - Institut de Physique Nucléaire d'Orsay
7 INFN, Sezione di Bologna - Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
8 GANIL - Grand Accélérateur National d'Ions Lourds
9 Unipd - Università degli Studi di Padova = University of Padua
10 INFN - Istituto Nazionale di Fisica Nucleare
11 NSCL - National Superconducting Cyclotron Laboratory
12 Universidad de Huelva
13 INFN, Sezione di Padova - Istituto Nazionale di Fisica Nucleare, Sezione di Padova
14 IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS
15 CNAM - Conservatoire National des Arts et Métiers [CNAM]
16 UW - University of Warsaw
17 UJ - Uniwersytet Jagielloński w Krakowie = Jagiellonian University

FAZIA (Forward A and Z identification Array) is an array of threestage Si-Si-CsI(Tl) telescopes. It was designed to operate with beams in the 20– 100 MeV/u energy range and it provides charge and mass discrimination over a wide range of nuclei and energies. In the perspective of FAZIA experiments at lower energies (e.g. to be realized at the new ISOL facilities SPES and/or Spiral2), and in general to lower the identification thresholds, the time of flight (ToF) information could be used. Usually, the time of flight can be obtained in two ways: either two detectors (start and stop) are used at a certain well-measured distance, or the start time mark is given by the accelerator RF signal. In order to work also in the absence of pulsed beam, we are studying and implementing a new approach that works for those events where at least one ejectile is properly discriminated in mass. The identified fragments can be used to extract the event start time mark from their energy and mass. This algorithm needs a perfect synchronisation among all the ADC clock signals and a precise tuning of all the possible clock skews. This contribution reports on such recent FAZIA activity, focusing on the basic ideas of the method and on some first results from recent experiments at LNS.

Domaines: Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]

S. Valdré, G. Poggi, A. Buccola, G. Casini, N. Le Neindre, et al.. Time of flight identification with FAZIA. International Workshop on Multi facets of EoS and Clustering (IWM-EC 2018), May 2018, Catane, Italy. pp.167, ⟨10.1393/ncc/i2018-18167-7⟩. ⟨hal-02116521⟩