T0 Arrays for PHOBOS at RHIC
Abstract
PHOBOS is one of four experiments at the Relativistic Heavy Ion Collider (RHIC) looking for signatures of the quark- gluon plasma, using beams of colliding ions. The T0 arrays were developed in 2001 to provide an accurate start time for the time-of-flight measurements carried out with the PHOBOS Time-of-Flight (TOF) walls. The T0 system comprises of 8 plastic cherenkov radiators, each attached to a Hamamatsu R2083 phototube which provide a timing resolution of about 60 ps for minimum ionizing particles. The T0 system is split into two arrays each holding four photomultiplier tubes, and placed on either side of the interaction point of the PHOBOS detector, along the beam axis. We will present the design of the T0 system, its performance at RHIC as a time zero reference for the TOF measurements, as well as its capabilities as a vertex detector.
- Publication:
-
APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- October 2002
- Bibcode:
- 2002APS..DNP.BE012J