Beamtest runs

• Tracker Config (Threshold Scan)
• Threshold scans with positron
• Threshold scans with hadron
• Bias voltage scan.
• Delay scan.
• Gamma data
• Location of the binary data

Configuration of the tracker

Threshold setting

The threshold was kept constant during the beam test (except for the threshold scans, see below).

The threshold setting was 30 dac counts which corresponds to about 170 mV ((30+1) * 5.5). There was one noisy ladder and the threshold was increased to 60 dac settings (335 mV) during the beamtest. The ladder corresponds to layer 2, x-view, channel 321-640.

layer 2, x-view, channel 320-639

threshold = 60 dac => 335 mV

all other layers

threshold = 30 dac => 170 mV

Layers for which the thresholds were changed during a threshold scan

The threshold for only a few planes were changed for the threshold scans (positrons and hadrons).

0 degree scans

The threshold was changed for planes 8, 9, 10 and 11.

45 degree scans

The threshold was changed for planes 7, 8 and 9.

65 degree scans

The threshold was changed for plane 7.

Location of Data

If the runs were converted to root files check the Rooted runs at SCIPP page.
We also extracted the tracker binary data from the raw data runs. Check the directory:
\\Odin\data\bt99\binData
for available runs.

Threshold Scans with Positron

0 Degree, detector bias = 100V

45 Degree, detector bias = 100V

65 Degree, detector bias = 100V

Bias Voltage scans

Threshold dac was set to 30, the incident angle was 0 degrees. positron beam.

Delay scans

Threshold dac was set to 30, the incident angle was 0 degrees. positron beam. The delay between L1t and tack was changed.

Proton/pion Threshold scan

Gamma data

These are some randomly chosen photon runs