Speaker
Miguel Morales
(Univ. Santiago de Compostela)
Description
We have developed several prototypes of small size timing RPCs able to work with very small gas fluxes or even without any gas supply. Such detectors could be very useful for those purposes requiring a compact, easy to handle and easy to transport small detector offering at the same time sub-ns time resolution.
We have built several 2-gap tRPC chambers of glass, 160mm long and 50mm wide, with 0.3mm wide gaps. At the middle of the chamber, either an aluminum plate placed between the external glasses or two parallel copper electrodes placed between two glass plates provided the high voltage. The RPCs were sealed all around except on two small holes where two capillary tubes of silicone provided them a low gas flux. At the outer sides of the external glass plates, the induced electric pulses were read-out independently at both ends of two parallel Cu-tape electrodes 20mm wide. In all the cases, the amplifying electronics is based on the Philips BGA2712 amplifier that provides a factor 10 of gain. Both chambers have been filled with a gas mixture of Freon-R134a/ SF6 with a ratio 0.9/0.1
Two tRPCs chambers may be placed parallel in an ordinary stainless steal box of 188 × 120 × 55mm3 offering a total occupancy of around 70% and allowing to built bigger many-box structures.
In this poster we summarize the main performances provided by those proto- types. We have also tested the ageing effects on those performances without any gas supply during several weeks time.
Primary authors
Dr
J. Luis Rodríguez
(Univ. Santiago de Compostela)
Miguel Morales
(Univ. Santiago de Compostela)
Co-authors
Diego Ramos
(Univ. Santiago de Compostela)
Juan A. Garzon
(Univ. Santiago de Compostela)
Nuria Teigel
(Univ. Santiago de Compostela)
