ACORDE OFFLINE STATUS April 7 2008 th Offline
- Slides: 17
ACORDE OFFLINE STATUS April 7 2008 th Offline Week Presented by: Mario Rodríguez Cahuantzi (FCFM-BUAP)
Outline Status of: ü Digitalization (August 2007) ü Geometry ¡ Reconstruction ü Raw Data Reading ¡ Convert. Digits ¡ Fill. ESD ¡ Calibration ¡ Alignment 7/April/08 Offline Week @ CERN
Geometry of Acorde (Ali. ACORDEv 1) Gometry described by TGeo Objects. It is implemented on six parts: ACORDE_1 Bars &Supports In-Side ACORDE_2 Bars &Supports Up-Side ACORDE_3 Bars &Supports Out-Side ACORDE_4 Modules In-Side ACORDE_5 Modules Up-Side ACORDE_6 Modules Out-Side ACORDE 7/April/08 Offline Week @ CERN
ACORDE bars and supports (In-Side) In-Side ACORDE_1: ACORDE 7_1 ACORDE_SUPPORT 7/April/08 Offline Week @ CERN
ACORDE bars and supports (Up-side) Up-Side ACORDE_2: ACORDE 00 ACORDE_SUPPORT 7/April/08 Offline Week @ CERN
ACORDE bars and supports (Out-side) Out-Side ACORDE_3: ACORDE 7_1 ACORDE_SUPPORT 7/April/08 Offline Week @ CERN
ACORDE Modules (In-Side) In-Side ACORDE_4: ACORDE_MODULE 18 modules 7/April/08 Offline Week @ CERN
ACORDE Modules (Up-Side) Up-Side ACORDE_5: ACORDE_MODULE 24 modules 7/April/08 Offline Week @ CERN
ACORDE Modules (Out-Side) Out-Side ACORDE_6: ACORDE_MODULE 18 modules 7/April/08 Offline Week @ CERN
Full ACORDE geometry: Supports, bars and modules (60 modules) SIDE C OUT-SIDE IN-SIDE A 7/April/08 Offline Week @ CERN
Reconstruction ACORDE works as a trigger detector, consequently the reconstruction means to read the single muons and multicoincidence signal distributions. The macro Aco. Reco. C was created to fill Histograms with the Acorde's Bit. Pattern information. Aco. Reco. C implements the needed Reconstruction for ACORDE. Used CDB for parameters: Procedure: “decoding data” of Aco. Reco Convert. Digits store ESDs Convert. Digits 7/April/08 Offline Week @ CERN
Acorde Raw Data (Ali. ACORDERaw. Stream) FOUR WORDS OF 32 BITS CONSIDERED word[0] --> Modules 1 to 30 --> bits 31, 32='00' --> 0000. . . . 0 word[1] --> Modules 31 to 60 --> bits 31, 32='01' --> 0100. . . . 0 word[2] --> Modules 1 to 30 --> bits 31, 32='10' --> 1000. . . . 0 word[3] --> Modules 31 to 60 --> bits 31, 32='11' --> 1100. . . . 0 7/April/08 Offline Week @ CERN
Reconstruction: Procedure Aco. Reco ----> based on Ali. ACORDERaw. Stream P. E: 000000100000000001 -->dy. Word[0] Ali. ACORDERaw. Stream* raw. Stream = new Ali. ACORDERaw. Stream(raw. Reader). . . . dy. Word[0]=raw. Stream->Get. Word(0); --> tmp. Dy dy. Word[1]=raw. Stream->Get. Word(1); --> tmp. Dy dy. Word[2]=raw. Stream->Get. Word(2); --> tmp. Dy dy. Word[3]=raw. Stream->Get. Word(3); --> tmp. Dy. . loop over the first 30 bits of each word { kro. Single[r] = tmp. Dy & 1; (or kro. Multi[r] =. . . ) tmp. Dy>>=1; } 7/April/08 Offline Week @ CERN
Real data: single muon hits and multiplicity 7/April/08 Offline Week @ CERN
Calibration The calibration for ACORDE is the monitoring of the rate per single module. We will not expect a big change in all of them. Details should be presented on Friday session. 7/April/08 Offline Week @ CERN
Alignment To take into account possible variation of the ideal geometry (during simulation & reconstruction) and then correctly associate signals to position in space (for several Alice-subdetectors). Make. ACORDEFull. Mis. Alignment. C : Load Acorde’s geometry. Produce a transformation accordingly to the user. Produce new geometry. • Once we have created a root file with misalignment objects, we need to simulate and verify the changed geometry. Effect on measurements from the reconstruction. 7/April/08 Offline Week @ CERN
Summary The geometry is finished: commited to svn. Reconstruction: We decode the data (bit pattern) and store the information in a standar output format (root files): to implement Ali. ESDACORDE class. Raw data Reading: Finished. committed to svn. Calibration: done and not commited to svn 7/April/08 Offline Week @ CERN
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