Pixel Offline Study Jianchun Wang

2 Data Transfer  Anonymous FTP to fnppd is allowed, but only to limited locations.  Script cp2fnppd FTP files from pixel07 ( /data/testbeam/daq/data ) to fnppd. It is spawned by the DAQ process (thanks to Lorenzo).  Script cp_at_fnppd copies file from the FTP directory on fnppd ( /exports/home/ftp/incoming/dropoff/btevfiles/pixel_tb04 ) to file storage location ( /data/btev_2/btev/pixel_tb04/data ). It runs every 10 minutes as cron job.  If the file transfer failed due to fnppd down or other reason, the information is logged in FILE.log on pixel07 and one can run the script manually in the data directory: cp2fnppd filename.  Files at FTP directory will be purged by root only.

3 Detector Configuration YXX 1 Beam XXYXX Plane Orientation iz X reference planes Y reference planes

4 First Peep of Runs at Different T Run Condition~20°C0°C0°C-10°C, N plane > 4 Num of event(110712) 10147(120009) 10095(~111000) 9568 Total hits / event Average number of planes Tracks saved °C 0°C -10°C

5 Alignment  The detector configuration (alignment) is stable (  x,  y < 20  m) for different temperatures.  The location of reference planes at fixed to be 0. This is potentially a problem to track formation if the beam is inclined.  The mechanical alignment works well this time. dx(cm) dy(cm) SPD_Y SPD_X SPD_X SPD_X SPD_X SPD_X SPD_Y SPD_X

6 Beam Dispersion Plot