Physics pulse shapes
Download
1 / 7

Physics Pulse Shapes - PowerPoint PPT Presentation


  • 90 Views
  • Uploaded on

Physics Pulse Shapes. A first look with a handful of Luminosity Blocks. Reminder: FIR coefficients. Our final calibration depends on the Filters used We are using a simplified set of coefficients Suggested by David Hadley Based on calibration pulse shapes

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Physics Pulse Shapes' - karif


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Physics pulse shapes

Physics Pulse Shapes

A first look with a handful of

Luminosity Blocks

Physic Pulse Shapes


Reminder fir coefficients
Reminder: FIR coefficients

  • Our final calibration depends on the Filters used

  • We are using a simplified set of coefficients

    • Suggested by David Hadley

    • Based on calibration pulse shapes

  • Big question: do calibration pulses = physics pulses

  • FIR coefficient sets

    • EM layer: 1, 8, 13, 10, 7

    • Hadronic layer: 1, 9, 15, 11, 5

    • FCAL (all layers): 0, 2, 13, 5, 0

Physic Pulse Shapes


Analysis technique
Analysis ‘technique’

  • Raw data from run 160800

    • About 5 luminosity blocks of Jet/Tau/Etc stream

    • Start of fill, so high luminosity

    • Lots of big pulses

  • Use only pulses with maximum FADC > 60

    • Similar to timing analysis cuts

  • Average pulse shape by (major) partition

    • EMB, EMEC, HEC, Tile, FCAL

  • As always FCAL has the last laugh…

Physic Pulse Shapes


Em layer
EM layer

Physics pulses

(marginally)

narrower

(n-2) sample

close to zero

Physic Pulse Shapes


Hadronic layer
Hadronic layer

HEC pulses

(marginally)

narrower

(n-2) sample

close to zero

For HEC

Tile almost

perfect

Physic Pulse Shapes


Fcal the joker in the pack
FCAL – the joker in the pack

ALL pulses

are wider

FCAL2+3

(hadronic) are

particularly wide

Physic Pulse Shapes


Conclusions
Conclusions

  • Differences between calibration and physics pulses will distort FADC to LUT energy conversion

    • Will eventually require recalibration of LUT slopes

    • Also maybe re-evaluation of FIR coefficients

    • For the future (but when?)

  • Main effects for now should be:

    • Tile is about right

    • EM will be underestimated in LUT value

    • FCAL will be overestimated in LUT value

  • Is this all backed up by Yuriy/Juraj’s observations?

Physic Pulse Shapes


ad