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Comment: 36 pages, submitted to Nuclear Instruments and Methods A
Detectors of Internally Reflected Cherenkov light (DIRC) are powerful devices for charged particle identification (PID). Indeed, the primary detector to separate kaons and pions up to few GeV/c in the barrel region of the BABAR experiment was based on the DIRC technology and performed extremely well over almost a decade of operation. In the first part of this talk, we will review the DIRC principles (charged particles emit Cherenkov light when crossing fused silica bars; part of the photons are trapped by total internal reflection and propagate in the radiators until a camera where they are detected by photon detectors) and the associated experimental challenges. We will focus on the BABAR ring-imaging Cherenkov detector, the DIRC. After presenting its design, we will summarize its performances such as the experience gained by operatin...
The Focusing Detector of Internally Reflected Cherenkov light (FDIRC) has been designed to separate efficiently kaons from pions up to a few GeV/c in the barrel region of a HEP experiment. This ring-imaging Cherenkov detector is based on the same principle as the BABAR DIRC, which was successfully operated at the SLAC PEP-II asymmetric B-Factory during a decade. Charged particles cross thin quartz bars in which they radiate Cherenkov light; part of these photons are trapped in the radiators by total internal reflection and propagate until a camera where they are detected by photon detectors. The FDIRC was intended for the SuperB detector, a new generation flavour factory which has been cancelled at the end of 2012 due to lack of funding. Therefore, it has been designed to be able to operate at very high luminosity (10^36/cm^2/s) and la...
The FDIRC (Focusing Detector of Internally Reflected Cherenkov light) is a charged particle identification (PID) detector which separates efficiently kaons from pions up to a few GeV/c. It is the successor of the BaBar DIRC, which was successfully operated at the PEP-II B-Factory during a decade, and benefits from the knowledge accumulated with a first focusing DIRC prototype, built and operated at SLAC in the recent years. The FDIRC is a ring-imaging Cherenkov detector based on the same concept as the BaBar DIRC. Yet, its design has been significantly improved to be able to operate at much higher luminosity (10^36 cm^-2s^-1) and with larger backgrounds. Indeed, the FDIRC was intended to cover the barrel region of the SuperB detector, a new generation flavour factory cancelled at the end of 2012 due to lack of funding. The FDIRC photon...
The FDIRC (Focusing Detector of Internally Reflected Cherenkov light) is a new concept of PID (Particle IDentification) detector aimed at separating kaons from pions up to a few GeV/c. It is the successor of the BaBar DIRC and benefits from the knowledge accumulated with a first FDIRC prototype built and operated at SLAC. The FDIRC is intended to be used in an environment with a luminosity 100 times higher than for BaBar and Belle. Backgrounds will be higher as well; yet, the FDIRC has been designed to perform at least as well as the View the BaBar DIRC. The main improvement is a complete redesign of the photon camera, moving from a huge tank of ultra-pure water to much smaller focusing cameras with solid fused-silica optics. Furthermore, the detection chain will be 10 times faster than in BaBar to reject more background and to measure...
The DIRC-like time-of-flight detector (FTOF) is a ring imaging Cherenkov counter designed to improve the charged particle identification on the forward side of SuperB. Here we review the main characteristics of this device, summarize the results of a prototype test done last year in the SLAC Cosmic Ray Telescope and present the future steps needed to build the FTOF.
We present a progress status of a new concept of PID detector called FDIRC, intended to be used at the SuperB experiment, which requires π/K separation up to a few GeV/c. The new photon camera is made of the solid fused-silica optics with a volume 25× smaller and speed increased by a factor of 10 compared to the BaBar DIRC, and therefore will be much less sensitive to electromagnetic and neutron background.
An overview of the electronics chains for the two charged particle identification (PID) detectors of the SuperB experiment is presented. The PID group is designing different detectors for the barrel (FDIRC) and forward (FTOF) regions. Both are based on time measurements, respectively in the 100 ps and 10 ps rms resolution domains.
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