Published April 13, 2020 | Version v1
Publication Metadata-only

The GRAAL Project

Arqueros, Fernando
Ballestrín, Jesús
Berenguel Soria, Manuel
Borque, D.M.
Camacho, Eduardo F.
Díaz, M.
Gebauer, H.-J.
Plaga, R.
Portocarrero, C.E.
Other:
Universidad de Sevilla. Departamento de Ingeniería de Sistemas y Automática

Description

The GRAAL Project (Gamma Ray Astronomy at ALmeria) makes use of the CESA-1 heliostat field at the "Plataforma Solar de Almeria" (Spain) as a gamma-ray telescope with an energy threshold of about 100 GeV. Cherenkov light generated by EAS is reflected by the heliostats and collected into photomultipliers (PMTs) with nonimaging secondary optics. Each PMT collects the light reflected by 13 - 18 heliostats of 40 m2 using a Winston cone. After successful tests with two collecting cones, a more advanced setup on a dedicated platform, using four collectors and 63 heliostats (total reflecting area of about 2500 m2 ) is being installed. A description of this setup together with Monte Carlo results about its excellent capabilities in the precise determination of pulse arrival times are presented.

Abstract

26th International Cosmic Ray Conference Salt Lake City, Utah August 17-25,1999

Additional details

Identifiers Origin repository
Created:
December 4, 2022
Modified:
November 30, 2023