High Energy Collisions Investigations

# The MCH Mapping ## A PIP for a WIP ### Laurent Aphecetche #### 19 Jun 2017

# Talk's purpose ### Refresher about MCH mapping concepts ### Some ideas on its implementation evolution --- # The Big Picture +++ ![](/talk/2017-06-20-mch-mapping/alice.jpg) +++ ![](/talk/2017-06-20-mch-mapping/alice-muon.jpg) +++ ![](/talk/2017-06-20-mch-mapping/alice-muon-zoom.jpg) +++ ![](/talk/2017-06-20-mch-mapping/alice-muon-zoom-nb.jpg) +++ ![](/talk/2017-06-20-mch-mapping/alice-muon-zoom-absorber-mch-mid-in-color.jpg) +++ ![](/talk/2017-06-20-mch-mapping/alice-muon-zoom-slats-and-sectors-in-color.jpg) --- # MCH Detector Parts +++ - stations and chambers - detection elements * sectors * slats * planes - ddls - buspatches - manus - pads +++ ## Stations (st) and Chambers (ch) ### 5 stations, 2 chambers each ### = 10 chambers +++ ## 10 chambers ![](/talk/2017-06-20-mch-mapping/chambers.png) +++ ## Detection Elements (de) ### Elementary parts of the detector ### (re-moveable and hence should be aligned) ### 156 units +++ ![](/talk/2017-06-20-mch-mapping/des.png) +++ ## Sectors and slats ### Stations 1 and 2 : sectors (a.k.a. quadrants) #### 8 units, 2 types ### Stations 3,4 and 5 : slats #### 148 units, 19 types +++ ![](/talk/2017-06-20-mch-mapping/sectors.png) +++ ![](/talk/2017-06-20-mch-mapping/slats.png) +++ ## Planes ### Each DE has two planes ### Bending (b) & Non-Bending (nb) plane ### A plane is a set of pads +++ ## Motifs ### A group of <= 64 pads ### One FEE card ### 283 types (171 for slats) +++ ## work ![](/talk/2017-06-20-mch-mapping/r2nx_mapping.png) +++ ![](/talk/2017-06-20-mch-mapping/motifs-sample.png) +++ ## DDLs & Buspatches ![](/talk/2017-06-20-mch-mapping/muon-daq-run2.png) +++ ## GBTs and CRUs ![](/talk/2017-06-20-mch-mapping/muon-daq-run3.png) +++ ## Voltages ![](/talk/2017-06-20-mch-mapping/sector-hv.png) +++ ## Numbers recap (Run 2) - 20 DDLs - 156 DEs - 888 buspatches - 16828 manus - 1064008 pads +++ ## Numbers recap (Run 3) - ~25 CRUs - 156 DEs - ~600 elinks - 16828 dual sampas - 1064008 pads --- # The Mapping Roles +++ ## Finding pads - by (ix,iy) - by (x,y) - by (fee,channel) ### a.k.a. Segmentation +++ ## Linking R/O and segmentation - DE <-> DDLs - DE <-> buspatches - DDL <-> buspatches - buspatches <-> FEE +++ ## Linking DCS and segmentation - manu <-> HV - DE <-> LV +++ ## Each role used in different parts of the code e.g. - find by position : clustering - R/O to pad : raw data decoding - HV/LV : data filtering --- # Current (Run2) Implementation +++ ## Text files - 666 (!) text files - several different formats (custom) - interpreted w/ custom readers - used to construct objects hierarchy +++ ## OCDB - Text files [ in 1 ROOT obj in OCDB ] - Still treated as text files +++ ## All or nothing ### one single (big) set of objects - in memory (but designed to be compact) - all the time - for all purposes --- # Next (Run3) Implementation +++ ## Data source format - custom and small text files were nice - when developping the mapping - but mapping is now known and fixed - still, human readable stays usefull +++ ## Use JSON as the only text format - still human readable / writeable - but parser(s)'s coming "for free" this time - in whatever language +++ ## Limit the number of files ### one per "detector level" (ch,de,seg,etc...) +++ ## Generators - don't (necessarily) use JSON directly - generate code for trivial/small things - generate binary format(s) (e.g. FlatBuffers) and - be more "functional" and less OO ? +++ ## Split mapping ### natural level of work(*) is DE ### ### one (binary) mapping per DE (*) up to tracking +++ ## Status : txt - berg - bp - ch - ddl - de - motif (for slats) - pcb - slat - sector ... _modulo_ tests, of course ... see [https://github.com/mrrtf/alo/blob/master/jsonmap/mch-mapping-convert-to-json.cxx](https://github.com/mrrtf/alo/blob/master/jsonmap/mch-mapping-convert-to-json.cxx) +++ ## Next Steps - code the reverse conversion txt - to check all information is actually still there... - (re)write **tests** - generate some code and some binary format --- # or