INFN-Roma, Roma, Italy
INFN/LNF, Frascati (Roma), Italy
The DAΦNE Beam Test Facility (BTF) is operational in Frascati since 2003. In the last years the beam diagnostics tools have been completely renewed and the services for users have been largely improved. We describe here the new transverse beam diagnostics based on new GEM TPC detectors and MEDIPIX Silicon pixel detectors, the renewed DAQ system and the data caching system based on MEMCACHED and the integration of the new sub-systems in the new data-logging. Results on the optimization of the transverse beam spot and divergence are reported as well as the real-time diagnostics and feedback user experience.
INFN/LNF, Frascati (Roma), Italy
INFN-Roma, Roma, Italy
In the last 11 years, the Beam-Test Facility (BTF) of the Frascati DAΦNE accelerator, gained an important role in the development of particle detectors. e- or e+ beams can be extracted to a dedicated transfer line, where a target plus a dipole and collimator, can attenuate and select secondary particles in a narrow p (<1%) band. BTF can provide tuneable beams in a wide range of: energy (to 750 MeV/540 MeV for e−/e+), charge (up to 1010 e/bunch) and pulse length (1.4-40 ns) up to 49 Hz rep. rate. Beam spot and divergence can be adjusted, down to sub-mm sizes and 2 mrad. Photons can be produced on a target, and energy-tagged inside the dipole by Si micro-strip detectors. A shielded W target is used for neutron production: about 8 10-7/pr, 1 MeV n are produced. 200 beam days are delivered to about 20 groups/year. A dedicated experiment PADME for the search of light dark matter, like dark photons, ALPs, etc., was approved aiming at a sensitivity up to m=26 MeV/c2. An upgrade program of the facility is proposed, along 3 lines: consolidation of the LINAC, in order to guarantee a stable operation in the longer term; upgrade of the energy up to 1 GeV; doubling of the BTF beam-lines.
INFN/LNF, Frascati (Roma), Italy
INFN-Roma, Roma, Italy
In the last 11 years, the Beam-Test Facility (BTF) of the DAΦNE accelerator complex, in the Frascati laboratory, has gained an important role in the EU infrastructures devoted to the development of particle detectors. The facility can provide runtime tuneable electrons and positrons beams in a range of different parameters: energy (up to 750 MeV for e- and 540 MeV for e+), charge ( up to 1010 e /bunch) and pulse length (1.4-40 ns). The bunch delivering rate is up to 49 Hz and the beam spot and divergence can be adjusted, down to sub-mm sizes and 2 mrad, in order to achieve user needs. In these paper we are going to describe the new implementation of the secondary BTF beam transverse monitor systems based on WIDEPIX FITPIX detectors, operating in bus synchronization mode externally timed to BTF beams. Our software layout includes a data producer, a live-data display consumer and a MEMCACHED caching server. This configuration offers to BTF users a vary fast approach to the transverse data using TCP/IP calls to MEMCACHED with an easy and fast software integration on users DAQ. The data packing permits also to avoid the needs of mixed (user vs BTF) hardware synchronization.
