DAQMB/FEBs Readiness for First Beam
description
Transcript of DAQMB/FEBs Readiness for First Beam
![Page 1: DAQMB/FEBs Readiness for First Beam](https://reader035.fdocuments.net/reader035/viewer/2022062517/56813d03550346895da6a7a3/html5/thumbnails/1.jpg)
1J. Gu CERN CSC Meeting July 2008
DAQMB/FEBs Readiness for First Beam
Jianui GuThe Ohio State University
![Page 2: DAQMB/FEBs Readiness for First Beam](https://reader035.fdocuments.net/reader035/viewer/2022062517/56813d03550346895da6a7a3/html5/thumbnails/2.jpg)
2J. Gu CERN CSC Meeting July 2008
Electronics - First Beam Overview
This is a Machine Run (for them and us)First Priority is to “Time In” the Electronics
Beam Will Advance in Stages: Halo Muons, Low Luminosity Collisions,… Thus timing will advance in stages…
Tools:
Greg’s Radioactive Triggers(done now)• special runs single chambers • requires rate
Shift timing all chambers take data• requires data analysis• no special software written
Cosmic Ray – Crude Timing•random arrival (anytime)•random direction (speed of light)
Colliding Beams-Precise Timing•precise arrival (3 nsec)•fixed time of flight
Data and Time will be taken for Solely Hardware Purposes
![Page 3: DAQMB/FEBs Readiness for First Beam](https://reader035.fdocuments.net/reader035/viewer/2022062517/56813d03550346895da6a7a3/html5/thumbnails/3.jpg)
3J. Gu CERN CSC Meeting July 2008
Electronics - First Beam Overview
Improved timing should lead to: DAQ Board Readout Efficiency 100% Reduction of Board Readout Errors
Beam gives better understanding of timing and synchronization:
Test Beam 2003 –time structured beam
Time (bunch crossings)
Cathode Pulse Peak Time (avg 6 planes)
Time (nsec)
LHC Beam Structure(initial separation 75 nsec)
~5nsecdominated by electron drift
Cathode Pulse Peak Time (avg 6 planes)
![Page 4: DAQMB/FEBs Readiness for First Beam](https://reader035.fdocuments.net/reader035/viewer/2022062517/56813d03550346895da6a7a3/html5/thumbnails/4.jpg)
4J. Gu CERN CSC Meeting July 2008
Electronics – Expected Status
Live Electronics First Beam
by next week all pc crate electronics done• bad CFEBs,ALCTs• connector, cables …
Expect no access to chamber electronicsbefore first beam
On Chamber Problems:
12 CFEBs (kill 1/5 chamber each) 9 ALCTs (kill full chamber each)
Enter run with 97% Chamber Live