Activity report from CAF group

Marcello, Davide, Pigi, Camilo, Salvatore, Orso, David, Silvia, Georgi, Anna, Haiyun

CAF strategy• What kind of data do we have ?– Minimum Bias (low PT muon mostly from secondary vertex)

– Beam Halo (horizontal muon tracks)– Cosmic

• What we can study with those events ?– Noise and occupancy– Endcap efficiency

• EVENT SELECTION• STUDIES

What we are doing now ?

• Beam Halo selection– Trigger based (Salvatore) ready– CSC segment based (Haiyun) almost ready

• Minimum Bias selection– RPC rechits + tracker tracks (Orso)

• Detector Studies– RecHits distributions with MB and Cosmic (Orso)– CSC/RPC correlation (Camillo, Haiyun, Georgi)– Efficiency with beam halo events (Camillo)

• Trigger Studies: CSC versus RPC (Maciek)

• Noise (Silvia, David and shifter)

• BX distribution (Anna and Pigi)

Beam Splashes

"noisy strip" state:strip occupancy 3.5 times greater than average occupancy (from roll occupancy histogram)"noisy chamber”: average multiplicity > 6

Noise History from DQM(David Lomidze)

Historical DQM is on the way

CSC – RPC correlations(Camillo & Pigi)

BX distribution - splashes

Roll: RE+2_R3_CH02_CRoll: RE+2_R3_CH20_BRoll: RE+2_R3_CH20_CRoll: RE+2_R3_CH03_CRoll: RE+2_R3_CH21_CRoll: RE+2_R2_CH22_CRoll: RE+2_R2_CH29_BRoll: RE+2_R2_CH29_CRoll: RE+3_R2_CH20_ARoll: RE+3_R2_CH15_BRoll: RE+3_R2_CH16_BRoll: RE+3_R3_CH06_BRoll: RE+3_R3_CH06_CRoll: RE+3_R3_CH36_BRoll: RE+3_R3_CH36_C

Bunch crossing studiesfrom DQM(Anna C. & Pigi)

Minimum Bias muon

Minimum Bias muon