LHCf Run status at 7TeV collisions

Takashi Sako(Plots: K.Taki, H.Menjo)

LPC meeting 12-Apr-2010

6,300

2,200

(x10

0)Arm1 Arm2

Shower

Pi-zero (x100)

Statistics during stable beamsFill Shower

Arm1 Arm2 Total

1002 89 162 251

1005 29,048 38,547 67,595

1013 197,980 207,903 405,883

1019 70,212 93,403 163,615

1022 307,734 411,008 718,742

1023 270,860 357,194 628,054

1025 32,037 42,737 74,774

1031 188,999 253,785 442,784

1033 30,407 40,984 71,391

Total 1,127,366 1,445,723 2,573,089

Pi-zero 2,200 6,300 8,500

(Always first 10min is lost for the detector movement)

Blue: X HorizontalRed: Y Vertical

B1/B2 trimmed+/- 0.037mm

B1 trimmed- 0.076mm

7TeV preliminary results

Data only during the stable beam on 31 March

0 degree off center(neutral center)

900GeV results

• ~70% analyzed• Corrected bunch

intensity to be included

• More (x2, x3) statistics appreciated

Run plan for a next month

• Finish configuration (gain, threshold, latency) survey soon

• Accumulate 104 pi-zero with the default setup (200 hours with the current luminosity)

• Accumulate 104 pi-zero at 2-3 different detector positions for PT survey (procedure to be discussed with ATLAS)

• Hope double/triple the 900GeV statistics• Start Xing angle run to enlarge the PT coverage• Studying intermediate beam energy 1.5-2.0 TeV