ACORDE REPORT Pedro Podesta UAS Mexico

Geometry ( No changes) Alignment (No changes) QA (No changes ) Shuttle (In progress) To do Outline

ACORDE 60 modules Resolution= (2 m x 0.4m x 0.1m ) We only know is module is fired PMT HV ~ 900 V Efficiency (HV) Pulse discriminator hardware controlled Upgrade underway (at least one Year)

Geometry AliACORDEv1.cxx Well description of the detector. Modules, supports, case plastic etc.. It is included by default now in the reconstruction/macros Thanks Federico …

Survey Alignment AliACORDEAlign.cxx The survey data Survey_865479_ACORDE Two points per module (will be better 3 to have the plane ) Alignment is per module (60 align modules ) Only z coordinate taken for now. No overlaps, average difference is 2 cm..

Alignment Macros  MakeACORDEFullMisAlignment.C  MakeACORDEResMisAlignment.C  MakeACORDEZeroMisAlignment.C Using gaussian distribution needed some real number From the survey

Alignment Need to check overlaps Put the data in OCDB Put x,y position or correct geometry. Thanks to Rafaelle

QA Remove all histograms from digits, hits, Energy. Keep only one histogram. We monitor rates online any big change is noticed quite soon, as for examples last week make a firmware update we realized something was wrong.

Shuttle We had some inputs missing from DCS and the preprocesor was failing it was a problem with ECS and the start of run. It was fixed (July 2008 ). Thanks to Mario Ivan chiara, Latchezar an Franco. For me was far from clear. No plans to change DA or update.

A few remarks -We need to include the QA objects in the OCDB and also alignment object -We do not miss any data from DCS,DAQ or HLT -For now we have no difference for high low flux runs, since ACORDE is for cosmics physics. - Due to the way ACORDE works we have no way to change threshold online. So for low or hi flux we can not change parameters, since the fired trigger will not be ACORDE. -RecoParams still missing. -Preprocesor and DA will not change -No second pass calibration for us. We have measured efficiency and need implemetation

To do - Finish alignment - RecoParams - QA Reference - Include the real efficiency All comments, very welcome