Speaker
Dr
Dario Moricciani
(ROMA2)
Description
In order to have access to the reaction $e^+e^- \to e^+e^- \gamma\gamma$ in the energy
region of the phi meson production, new detectors along the (DAFNE)
beam line have to be installed in order to detect the scattered $e^+e^-$.
The HET detector is used for measuring the deviation of leptons from
their main orbit by determining their position and timing so to tag
gg physics events and disentangle them from background.
The HET detectors are placed at the exit of the DAFNE dipole magnets,
11 m away from the IP, both on positron and electron arm. The HET
sensitive area is made up of a set of 28 plastic scintillators.
A dedicated DAQ electronics board based on a Xilinx Virtex-5 FPGA have
been developed for this detector. It provides a MultiHit TDC with a
time resolution of the order of 500 ps and the possibility to
acquire data any 2.1 nsec, thus allowing to clearly identify the
correct bunch crossing.
First results of the commissioning run are presented.
for the collaboration
KLOE-2
Primary author
Dr
Dario Moricciani
(ROMA2)
Co-authors
Dr
Francesco Gonnella
(LNF)
Dr
Matteo Mascolo
(Roma2)
Prof.
Roberto Messi
(roma2)
Dr
lorenzo iafolla
(lnf)
