- wleight's home page
- Posts
- 2012
- 2011
- 2010
- December (1)
- November (3)
- October (4)
- September (5)
- August (4)
- June (1)
- May (1)
- April (2)
- March (2)
- February (2)
- January (3)
- 2009
- December (1)
- November (1)
- September (2)
- August (2)
- July (8)
- June (4)
- May (3)
- March (1)
- February (2)
- January (1)
- 2008
- 2007
- 2006
- My blog
- Post new blog entry
- All blogs
Some preliminary data plots for the BSMD calibration
The following plots are of either total or maximum BSMDE/P ADC vs. particle energy. They were obtained from Matt's electron trees. For each track in the trees, I applied the same cuts Matt uses to produce his e/p plots, and then took tracks with .8<e/p<1.2. Matt's trees save 11 BSMD strips in each plane, the strip that the track projects to and the five on either side. For these plots, the total ADC in each plane is the sum over the ADC(i)*relgain(i) for i running over all 11 saved strips; the maximum ADC is just the strip with the largest ADC*relgain. The track energy is the energy deposited in the tower the track points to with a correction for energy leakage. Note that for some tracks there is no BSMD information in one or both planes because track projection failed: those tracks are not included in this histogram.
Unfortunately, there's a problem with this method: sometimes there are two (sometimes even three) peaks in the eleven strips. Most likely only one of these peaks is associated with the track, and including all of them in the calculation is probably throwing it off. To correct for this, I'm rewriting my code to use only the peak closest to the central strip (the one the track projects to). Hopefully this will explain the lack of a linear trend in the below plots.
Figure 1: Total BSMDE ADC vs. Track Energy (in eta bins)
Figure 2: Maximum BSMDE ADC vs. Track Energy (in eta bins)
Figure 3: Total and Maximum BSMDP ADC vs. Track Energy
- wleight's blog
- Login or register to post comments