Inverted raw times before using cuts
Calibration data appears as a second peak around t1-t2=400 channels in the time above threshold spectrum.

* t1 -t2 in channels:
t1 -t2 in channels

After using the calculated slopes one sees that this second peak is exactly at the 200 ns corresponding to the internal calibration.

  • t1 - t2 in ns::
    t1 - t2 in ns:

As an example I chose the wires 3, 58 of the first MB to study the difference between them.
As it appears below the difference between the two wires is about 74 channels.

  • t1 in channels:
    t1 in channels
    But amazingly 76 ns

  • t1 in ns:
    t1 in ns


As a result of the huge slopes variation.

  • slopes in ns/ch:
    slopes in ns/ch
    Then I compared another file where the global offset is different by 200 ns.
    And found the following t1 spectrum.

  • t1 in channels:
    t1 in channels
    But after calibration:

  • t1 in ns:
    t1 in ns
    We see almost the same offset difference of 79 ns between the two wires.
    as the slopes remained in a range of 2% unchanged.

  • slope difference ns/ch:
    slope difference ns/ch

Topic attachments
I AttachmentSorted ascending Action Size Date Who Comment
slop.gifgif slop.gif manage 214.8 K 09 May 2006 - 16:33 KhaledTeilab slopes in ns/ch
slp_diff.gifgif slp_diff.gif manage 214.8 K 09 May 2006 - 17:48 KhaledTeilab slope difference ns/ch
t12ns.gifgif t12ns.gif manage 285.4 K 09 May 2006 - 16:13 KhaledTeilab t1 - t2 in ns:
t12raw.gifgif t12raw.gif manage 285.4 K 09 May 2006 - 16:08 KhaledTeilab t1 -t2 in channels
t1ns-200.gifgif t1ns-200.gif manage 248.7 K 09 May 2006 - 17:20 KhaledTeilab t1 in ns
t1ns.gifgif t1ns.gif manage 248.7 K 09 May 2006 - 16:22 KhaledTeilab t1 in ns
t1raw-200.gifgif t1raw-200.gif manage 282.3 K 09 May 2006 - 17:18 KhaledTeilab t1 in channels
t1raw.gifgif t1raw.gif manage 285.4 K 09 May 2006 - 16:21 KhaledTeilab t1 in channels
This topic: Homepages > CreateHomepageTopic > HomepageKhaledTeilab > ExternalPulserApr06
Topic revision: 10 May 2006, KhaledTeilab
 
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