1. LHCb Calorimeter upgrade
TDR
News
Spares
LHCb Calorimeter upgrade meeting
Frédéric Machefert
Laboratoire de l'Accélérateur Linéaire, Orsay

2. Outcome of the electronics review
The outcome of the review is very positive
No major problem with the foreseen implementation
Thank you to
All those who contributed to the review
To the referees
We have to think about the response of the group to the report
Should be discussed today during the analog / digital sessions
The document written will help us to write the electronics parts of the TDR to come
But the format is not the same → some reshuffling is necessary

3. Agenda – Meeting of Sept 20th, 2013

4. Preparation of the Technical Design Report
Introduction (1 page) (Frederic)
Electronics
Analog part (4 pages) (Barcelona)
Digital part (2 pages for the FE and 2 pages for the control board) (Frederic+Christophe+Olivier)
LLT (1 page) (Patrick)
DAQ (TELL40...) (1 page) (Orsay)
Auxiliary systems (HV, calibration, ...) (2 pages) (Yuri)
Aging/radiation effects on the modules (3 pages, Yuri) including a section on the replacement of the modules during LS3 (Mechanics, Marie-Noëlle) (1 page)
Performances
Pile-up (2 pages) (Alexis)
Particle identification without SPD/PRS (2 pages) (Dmitri)
Installation, commissioning , responsibilities, organization, schedule, costs...
Conclusions

5. Preparation of the Technical Design Report
First Initial
Draft of each
section
Latest
Corrections
First Draft
2nd Draft TB
LHCC
Circulation
Circulation
Oct, 11th
Oct, 18th
Oct, 25th
Nov, 2nd
Nov, 12th
Nov, 26th
The document can be accessed through svn (LHCbDocs) at
And information on LHCbDocs can be found at :
//svn.cern.ch/reps/lhcbdocs/Users/frederic/TDR_Sept2013/latest

6. MC simulations SPD/PRS removal does not work in GAUSS and BRUNEL
Some xml files concerning the SPD/PRS are required
Plan is to keep them in the next release of GAUSS temporarily
No arm, the files are useless
But unfortunately, the software needs the files to be there
The second problem is more annoying
Brunel needs to access some containers for electron reconstruction
The corresponding algorithms need some PRS/SPD information
Hard coded in the software
Brunel crashes abruptly
Olivier works on this in order to be able to configure correctly the algorithms.
We have 3 large samples which have been produced by Paul
No SPD/PRS
A simple trick → Brunel does not crash anymore
But, electrons are not reconstructed
3 completed productions : event type ( Bs_phigamma=DecProdCut )
Nu= 3.8, 7.6, ~100k events per sample.

7. Spares We plan to re-use a fraction of the present system
The problem of the spares is more severe than for any new system
Systems made by external companies
PMT
Power supplies (aging, cumulated radiation effects)
Fan
Systems made by the LHCb groups
Do we have any tension on the boards that we want to keep
HV, calibration system
Plan to use PRS/SPD power supplies as spares
We have ~300 PMT spares → some may be used by 2015
Contact taken with Hamamatsu
It seems that the reference we used (R ) is still available
Question on some ambiguity on the type of window
Price of a series of PMT
Wait for the answer from Hamamatsu