SIDDHARTA Setup SIDDHARTA Kaon monitor focusing quads bhabha monitor lead shield gamma monitor
Machine luminosity monitors and IP diagnostics tool e+ e- e+ e- g (8.5e-26 cm-2s-1@E>100MeV, 95% 1.7mrad) e+ e- e+ e- Z g (<10% background) e+ e- e+ e- g g (6.6e-29 cm-2s-1@E>100MeV, 15% 1.7mrad) now limited by accidentals (@10^32 and chamber vertical acceptance) e+ e- e+ e- Bhabha scattering - more clean process 312.5 Hz @ 18o<q<27o @ 1033cm-2 s-1 F. Bossi, P. Branchini, B. Buonumo, G. Mazzitelli, F.Murtas, P.Valente DAFNE-KLOE collaboration with the support of SSCR
Luminosity monitor for SIDDAHRTA run TILE CALORIMETER g MONITOR PbWO4 crystal GEM RING
Tile Bhabha calorimeter (lumi) 4 calorimeter composed by 5 30o sectors 7 lead sheet 5mm - 3 final lead sheet 10mm 12 30o scintillating tile for sector 3 WLS each tile 1 PM for any sector (20 PM) 12.5 X0 15% resolution @ 510 MeV First tail Russian sample arrived WLS installed and light emission tested BTF test planed for October PM, Electronics and DAQ by KLOE
A 3GEM Monitor for DAFNE rectangular GEM prototype under test @ DAFNE 10 cm 2.4 cm Annular gem foil design for bhabha detector @ DAFNE 2.4 cm 64 pads 10 cm The read out has been realized using 8 chip ASDQ (8 channel each) Test at BTF 99% efficiency for electron (signal in bhabha measure) ~ 1% efficiency for photons (background in bhabha measure) 32 + 32 channels
3GEM monitor test on DAFNE On April 2007 the 3gem chamber has been put at zero degree on DAFNE for photon detection coming from the FINUDA interaction region e - 3GEM e + lead beamstrahlung g number of photon vs time and FINUDA luminosity photon spot-size