1. LHCf Run status at 7TeV collisions Takashi Sako (Plots: K.Taki, H.Menjo) LPC meeting 12-Apr-2010

2. 6,300 2,200 (x100) Arm1 Arm2 Shower Pi-zero (x100)

3. Statistics during stable beams FillShower Arm1Arm2Total 100289162251 100529,04838,54767,595 1013197,980207,903405,883 101970,21293,403163,615 1022307,734411,008718,742 1023270,860357,194628,054 102532,03742,73774,774 1031188,999253,785442,784 103330,40740,98471,391 Total1,127,3661,445,7232,573,089 Pi-zero2,2006,3008,500 (Always first 10min is lost for the detector movement)

4. Blue: X Horizontal Red: Y Vertical B1/B2 trimmed +/- 0.037mm B1 trimmed - 0.076mm

5. 7TeV preliminary results Data only during the stable beam on 31 March 0 degree off center (neutral center)

6. 900GeV results ~70% analyzed Corrected bunch intensity to be included More (x2, x3) statistics appreciated

7. Run plan for a next month Finish configuration (gain, threshold, latency) survey soon Accumulate 10 4 pi-zero with the default setup (200 hours with the current luminosity) Accumulate 10 4 pi-zero at 2-3 different detector positions for P T survey (procedure to be discussed with ATLAS) Hope double/triple the 900GeV statistics Start Xing angle run to enlarge the P T coverage Studying intermediate beam energy 1.5-2.0 TeV