The AEgIS experiment is an international collaboration with the main goal of performing the first direct measurement of the Earth's gravitational acceleration on antimatter. Critical to the success of AEglS is the production of cold antihydrogen (El) atoms. The FACT detector is used to measure the production and temperature of the H atoms and for establishing the formation of a H beam. The operating requirements for this detector are very challenging: it must be able to identify each of the thousand or so annihilations in the 1 ms period of pulsed H production, operate at 4 K inside a 1 T solenoidal field and not produce more than 10 W of heat. The FACT detector consists of two concentric cylindrical layers of 400 scintillator fibres with a 1 mm diameter and a 0.6 mm pitch. The scintillating fibres are coupled to clear fibres which transport the scintillation light to 800 silicon photomultipliers. Each silicon photomultiplier signal is connected to a linear amplifier and a fast discriminator, the outputs of which are sampled continuously by Field Programmable Gate Arrays (FPGAs). In the course of the developments for the FACT detector we have established the performance of scintillating fibres at 4 K by means of a cosmic-ray tracker operating in a liquid helium cryostat. The FACT detector was installed in the AEgIS apparatus in December 2012 and will be used to study the H formation when the low energy antiproton physics programs resume at CERN in the Summer of 2014. This paper presents the design requirements and construction methods of the FACT detector and provides the first results of the detector commissioning

Particle tracking at 4K: The Fast Annihilation Cryogenic Tracking (FACT) detector for the AEgIS antimatter gravity experiment

Brusa, Roberto Sennen;Di Noto, Lea;Mariazzi, Sebastiano;
2013

Abstract

The AEgIS experiment is an international collaboration with the main goal of performing the first direct measurement of the Earth's gravitational acceleration on antimatter. Critical to the success of AEglS is the production of cold antihydrogen (El) atoms. The FACT detector is used to measure the production and temperature of the H atoms and for establishing the formation of a H beam. The operating requirements for this detector are very challenging: it must be able to identify each of the thousand or so annihilations in the 1 ms period of pulsed H production, operate at 4 K inside a 1 T solenoidal field and not produce more than 10 W of heat. The FACT detector consists of two concentric cylindrical layers of 400 scintillator fibres with a 1 mm diameter and a 0.6 mm pitch. The scintillating fibres are coupled to clear fibres which transport the scintillation light to 800 silicon photomultipliers. Each silicon photomultiplier signal is connected to a linear amplifier and a fast discriminator, the outputs of which are sampled continuously by Field Programmable Gate Arrays (FPGAs). In the course of the developments for the FACT detector we have established the performance of scintillating fibres at 4 K by means of a cosmic-ray tracker operating in a liquid helium cryostat. The FACT detector was installed in the AEgIS apparatus in December 2012 and will be used to study the H formation when the low energy antiproton physics programs resume at CERN in the Summer of 2014. This paper presents the design requirements and construction methods of the FACT detector and provides the first results of the detector commissioning
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
NETHERLANDS
ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
J., Storey; C., Canali; S., Aghion; O., Ahlén; C., Amsler; A., Ariga; T., Ariga; A. S., Belov; G., Bonomi; P., Bräunig; J., Bremer; Brusa, Roberto Sennen; G., Burghart; L., Cabaret; M., Carante; R., Caravita; F., Castelli; G., Cerchiari; S., Cialdi; D., Comparat; G., Consolati; L., Dassa; S., Di Domizio; Di Noto, Lea; M., Doser; A., Dudarev; A., Ereditato; R., Ferragut; A., Fontana; P., Genova; M., Giammarchi; A., Gligorova; S. N., Gninenko; S., Haider; S. D., Hogan; T., Huse; E., Jordan; L. V., Jørgensen; T., Kaltenbacher; J., Kawada; A., Kellerbauer; M., Kimura; A., Knecht; D., Krasnický; V., Lagomarsino; A., Magnani; Mariazzi, Sebastiano; V. A., Matveev; F., Merkt; F., Moia; G., Nebbia; P., Nédélec; M. K., Oberthaler; N., Pacifico; V., Petráček; C., Pistillo; F., Prelz; M., Prevedelli; C., Regenfus; C., Riccardi; O., Røhne; A., Rotondi; H., Sandaker; P., Scampoli; M. A., Subieta Vasquez; M., Špaček; G., Testera; D., Trezzi; R., Vaccarone; S., Zavatarelli
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/66708
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 9
social impact