HCAL Commissioning and Related Activities Fermi National Lab

HCAL Commissioning and Related Activities • Fermi National Lab • CERN • University of Iowa Anthony Moeller University of Iowa 1

HCAL ROC Shifts at Fermi Several group members take shifts at the Remote Operations Center (ROC) located at Fermi National Lab. Two kinds of shifts, Offline and Online. Offline Shift: Shifters pick an analysis task as suggested by: • • • – – HCAL PFG (Prompt Analysis Group) HCAL Operation Team Savannah Hcal Noise Task Force Hcal Roc Group 2

HCAL ROC Shifts, II • Online Shift: Shifts are parallel to CERN. Data and operations are checked by shifters at both locations, with ongoing communication between CERN and FNAL. – Start with current status check (Magnet, High Voltage, etc. ) – Run checklist for runs longer than 15 minutes and compare with CERN. – Additional quality checks (pedestals, hot and dead channels, etc. ) 3

HCAL ROC Shifts, III • Group members who have taken or are scheduled to take shifts at FNAL ROC: – – – – – Ugur Akgun Elif Albayrak Kwangzoo Chung Warren Clarida (Coordinator) Firdevs Duru Anthony Moeller James Wetzel Taylan Yetkin Kai Yi Iowa group members have taken 11. 6% of the shifts from April through the end of October 2009. 4

ROC/LPC Activities • By Warren Clarida • Co-coordinator of the HCAL Fermilab ROC shifts for Aug CRAFT 09. • Coordinator of the HCAL Fermilab ROC shifts for the startup of the LHC. • HCAL prompt feedback group tasks: – Investigated rates and quality monitoring for non-zero suppressed runs. – Studied readout box noise events. • Designed the standard histograms created by the HCAL Noise Monitor component of the HCAL Combined Monitor code developed at Fermilab. • Pictures and plots are on the next slide. 5

PFG Task results FED size with and without RBX noise events Non-Zero Suppressed rate from May July global runs Unsuppressed rate for a group of May Global Runs 6 6

HCAL Noise Monitor Plots http: //home. fnal. gov/~jhirsch/hcal/trendplots/Hcal. Roc. Mon. Summary_109046112647/runlist. html The standard plots that are produced by the HCAL noise monitor for every run. 7

HF Jet Energy Rates • By Elif Asli Albayrak • Used Monte Carlo minbias data to produce energy rates for all jets and HF jets. – Compare simulation results with real data. Minbias events energy rate for all jets. Minbias events energy rate for only HF jets. 8

HF PMT Simulations Can see RBX shape PMT events only (Simulation) • By Anthony Moeller • Cerenkov radiation from particles hitting the PMTs in the readout box behind HF can create abnormally large signals. – PMT events could be mistaken for new physics. – Abnormally large signals were seen for pions and muons at the 2004 testbeam. • A modified simulation including the PMTs was used to verify the cause of these events. • PMT hits exist for muons and pions, but not electrons (See next slide). 9

HF PMT, Cont. 100 Ge. V Pions 150 Ge. V Muons Green – PMT events Red and Blue – HF Body events • PMT events occur earlier than normal events (particles going all the way through HF travel at ~c, the signal in the fibers is slower). • Cutting events with a pulse time < 47 ns eliminates 98. 6% (88. 8%) of PMT events for muons (pions), but also cuts 6. 5% (9. 3%) of 10 physics events.

Monitoring of HCAL and Jet triggers • CERN-based activity of Kwangzoo Chung (April 2008 – April 2009) • HCAL trigger monitoring projects – Online trigger primitive occupancy plots – Offline Data Quality Monitoring of HCAL trigger primitive – Trigger cross section monitoring – Level 1 trigger – Jet Rates from CRAFT (cosmic ray global run) 2008 data (CMSCFT-09 -013 -002) Occupancy of HCAL trigger primitives in eta and phi, accumulated online through CMS data acquisition system (Chung) 11

Meetings • ROC/HCAL Commissioning – HCAL DPG Meetings (CERN) – HCAL ROC Meetings (LPC) – HCAL Noise Task Force Meetings (CERN/LPC) • HF PMT Simulation HCAL DPG Meetings (CERN) HCAL+ECAL Simulation Task Force Meetings (CERN/LPC) CMS Week HCAL Meetings (CERN) CMS Upgrade Workshop at FNAL, by Anthony Moeller ( Oct. 2009) – 2009 Prairie Section APS Meeting, by Anthony Moeller (Nov. 2009) – – 12