Restart up tasks with beam March 2002 last update Fri Mar 15 16:55:55 EST 2002 Coordinator Takeshi K. Komatsubara (KEK) --3/15 * FERA noise problem ---> fixed (The circuit breaker was fixed on March 04. A Fan module in L15 was replaced on March 07, and the ground current in panel A reduced from 3.3A to 2.5A.) * Missing "Busy" for the Osaka trigger board --> fixed A spike, observed in the level0 output signal, was taken care of by a slow slew-rate in the ALTERA chip. * DAQ hung problem --> fixed by George, Renee Take special runs for calibration etc, and ******************************** start standard mix in a few days <--- We start taking smx (March 09) ******************************** ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Requests for special runs (purpose, event#, trigger, namelist) should be Email-ed to David [djaffe@bnl.gov]. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ === Shift keepers should write every information to ELOG, take pedestals once in a shift, and fill out a _shift summary_ at the end of each shift. ( See http://www.phy.bnl.gov/e949/run/shift_duties.html ) === 0) QOD Check QOD to see all the subsystems are alive <--- Shift takers should run, printout and check QOD plots in running smx. - We are going to start "automatic-QOD" when we start smx runs. - *** Make "Standard QOD plots" !! *** 1) Confirm the trimming/calibrations established in Feb : Beam timing (Jingliang) <--- done IC(Jim) <--- done Delco (Steve) <--- done RS energy (Benji) <--- done T.2 (Steve) <--- done Target (Jim) <--- done TT timing (Tamaki) <--- done RS timing with RS-TDC (Sasha,Bob) -> being studied. RSSC/UTC (Shaomin,Toshio) -> being studied 2) Higher level trigger checks and calibrations FTDC (Benji) <--- done L1 stopping counter finder (Bipul) <--- done, okay L0z (Bipul) --> being studied L1.1 (George) ---> being studied with new masks and new TD gate. L1.2 (Norihito) <--- done, okay. !!! RS discriminator-mode issues (David)!!! *** David will coordinate the issues ***. a) set RS discriminator thresholds (15mV --> 25mV for Lay3-18) b) veryify that RS TDC occupation is acceptable c) consider to put discriminators into "Burst Guard" --> then "verify that we don't screw anything up" d) check the threshold vs single-photoelectron level. e) reading out trailing edge ? 3) Check the new trigger system, Rejection/Acceptance etc : Hex, BVL, BV meantimers (Tamaki/Takeshi) -> being studied and optimized L0zfrf (Tamaki) L19 veto (Tamaki) 4) Optimize our running conditions as the AGS intensity goes up. *** Reduce the data size, and decrease DAQ readout deadtime. *** a) reduce TD gate (to ~2usec...) (George) -> being studied b) reduce E2 CCD prompt readout window (perhaps 30ns->15ns) (Takeshi) c) set the proper prescaling factors for monitor triggers in smx d) setup the 1gamma trigger (Tamaki/Takeshi/Takashi) ... 5) Detailed performance checks Efficiencies and kinematic resolutions (Shaomin) T.2 efficiency (Milind,Nikolay) Photon Veto performance in online/offline (Joe,Takeshi, ...) 6) Special runs for detector calibration: o Once we reach the state of "steady running", we take the following runs for detector calibration. ( The run coordinator manages these special run. ) - pulser (no beam) with tdc3_fe55.cfg, 10M events (RSSC, once in two weeks) - km22_mix with all_v5.cfg, 50k events (RSgain, once in a week) - km21_mix with cs1_v5.cfg, 100k events (TT/UTC, once in a month) - eckmu2_mix with cs1_noCCD_v5.cfg, 400k events (ECgain, once in a month) ---