Trigger and data acquisition system for the N-N¯ experiment

Author

Baldo-Ceolin, M. ; Benetti, P. ; Bobisut, F. ; Bonaiti, V. ; Calligarich, E. ; Cavestro, A. ; Dolfini, R. ; Genoni, M. ; Gibin, D. ; Berzolari, A. Gigli ; Guglielmi, A. ; Mattioli, F. ; Mauri, F. ; Mezzetto, M. ; Piazzoli, A. ; Puglierin, G. ; Rappoldi, A

Author_Institution

Dipartimento di Fisica G. Galilei, Padova Univ., Italy

Volume

38

Issue

2

fYear

1991

fDate

4/1/1991 12:00:00 AM

Firstpage

471

Lastpage

475

Abstract

The trigger and data acquisition system for the N-N ¯ experiment at the Institute Laue-Langevin at Grenoble is described along with CAMAC modules especially designed for this experiment. The trigger system is organized around three logical levels; it works in the presence of a high level of beam-induced noise, without beam pulse synchronization, looking for a very rare signal. The final trigger rate is 4 Hz, not very different from the beam off rate, while the trigger efficiency for the antineutron annihilation detection is >0.7. The data acquisition is based on a MicroVAX II computer, in a cluster with four VaxStations, interfaces to CAMAC, and uses a modified version of the DAQP software developed at CERN. The system, has been working for a year with high efficiency and reliability

Keywords

CAMAC; data acquisition; 4 Hz; CAMAC modules; DAQP software; MicroVAX II computer; antineutron annihilation; data acquisition system; trigger efficiency; trigger rate; trigger system; CAMAC; Computer interfaces; Data acquisition; Earth; Inductors; Magnetic shielding; Neutrons; Noise level; Optical pulse generation; Scintillation counters;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.289341

Filename

289341