Dear Budapest group,
as you could have noticed from the news at the last alignment meeting  
[1] we have the first cosmics available at 0T, and
Gero has already started a first alignment of the PIxel large  
structure to see the effect (see slide 3 of [1])  while Nazar has
also performed a first check of some basic track quantities [2]

Nevertheless the big campaign of cosmics collected at 4T (CRAFT) will  
be during  5-14th February.

Among the alignment tasks of this year you have agreed upon was to run  
the alignment with the very first data/CRAFT12 data
using Millepede. Please prepare for it now to be able to provide  
feedback as soon as possible so that we will beable to update
the alignment (especially the pixel position) for prompt  
reconstruction before the first physics pp data taking in April.

Now, technically:

1. the dataset will be available at the Twiki: https://twiki.cern.ch/twiki/bin/view/CMS/TrackerAlignment2012 
#CRAFT12

2. Gero already set up a working version of the MP in 51X under:
	ALCA_TRACKERALIGN/MP/MPproduction/CMSSW 5 1 1 patch2

3. After the alignment will be necessary to validate the geometry with  
geometry comparison and track based validation (DMR):
for this we kindly request Andreas Mussgiller (ex- Tk alignment  
software coordinator)  to set up a working common validation
area in 51X (we will point you to that as soon as available).

4. The idea would be first to have a look to the alignment of the high  
structures like Pixels Barrel layers in the degrees of freedom in
which we are sensitive to. The expected rate in the pixel has been  
recently checked by Delhi group and in 2011 was ~0.11 Hz (BPIX).

5. Please prepare your software environment now to be ready to run the  
alignment immediately when we get the CRAFT12 data.
You can test already now with the 0 T data. An example config file can  
be found at
/afs/cern.ch/user/f/flucke/ALCA_TRACKERALIGN/MP/MPproduction/mp1046/ 
alignment_cosmics_0T.py

For field-on data you will have to change from
process.BrokenLinesBzeroTrajectoryFactory
to
process.BrokenLinesTrajectoryFactory

and to remove the line
process 
.AlignmentProducer.algoConfig.TrajectoryFactory.MomentumEstimate = 10.

Please confirm that you are available for fast reaction and do not  
hesitate to contact us in case of technical problems.

Thanks!
Cheers,

Roberto for Gero

[1] https://indico.cern.ch/getFile.py/access?contribId=0&sessionId=1&resId=0&materialId=slides&confId=173166
[2] https://indico.cern.ch/getFile.py/access?contribId=4&sessionId=1&resId=0&materialId=slides&confId=173166



______________________________________

Roberto Castello
Centre for Cosmology, Particle Physics and
Phenomenology - CP3 - UC Louvain, Belgium
phone (CERN)  +41. 22.767.4739
phone (UCL)    +32. 10. 47. 3347
______________________________________