Abstract
The KEDR experiment is ongoing at the VEPP-4M e+e− collider at Budker INP in Novosibirsk. The collider center of mass energy range covers a wide spectrum from 2 to 11 GeV. Most of the up-to-date statistics were taken at the lower end of the energy range around the charmonia region. Planned activities at greater energies up to the bottomonia would lead to a significant increase of event recording rates and accelerator backgrounds, thus stressing the existing DAQ and trigger systems beyond their limits. The described DAQ upgrade plan includes: the redesign of the trigger electronics using modern components to improve the trigger decision time; the development of new readout processors using ethernet connections; new software for collecting events and electronics management; high level of parallelization of data transfers and events processing; improved reliability based on readout computing cluster with redundancy. The upgraded DAQ system is going to be very flexible and could be considered as a concept prototype of the projected BINP Super Charm-Tau Factory.
Highlights
The KEDR detector[1] (Figure 1) is a universal magnetic detector for experiments at the VEPP-4M collider and consists of the following systems and parts: a vacuum chamber, a vertex detector, a drift chamber, aerogel Cherenkov counters, scintillation counters, a cylindrical calorimeter based on liquid krypton, a superconducting magnet, a muon system, a magnet yoke and an endcap CsI calorimeter
The readout processor (RP) reads data out of the Information boards (IBs) according to the program preloaded from a computer and saves them in one of its two memory blocks
The primary trigger (PT) of the KEDR detector is located near the detector, side by side with the electronics forming the signals for it
Summary
The KEDR detector[1] (Figure 1) is a universal magnetic detector for experiments at the VEPP-4M collider and consists of the following systems and parts: a vacuum chamber, a vertex detector, a drift chamber, aerogel Cherenkov counters, scintillation counters, a cylindrical calorimeter based on liquid krypton, a superconducting magnet, a muon system, a magnet yoke and an endcap CsI calorimeter. The physics program of the KEDR detector is very wide and includes the following basic measurements:. The data acquisition system[2] (DAQ) of the KEDR detector is based on the KLUKVA1 standard developed by the BINP in late 1980s. It is composed of special crates with a fast data bus and a set of electronic units. The planned physics activities at greater energies including bottomonia would lead to a significant increase of the event recording rate and accelerator backgrounds, stressing the existing DAQ and trigger systems beyond their limits. To maintain compatibility with the existing information boards and to reduce overall costs this upgrade touches only the readout processor on the KLUKVA side
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