Hall C KPP Run Plan Accelerator Readiness Review Phase 4 January 9 10
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1 Hall C KPP Run Plan Accelerator Readiness Review Phase 4 January 9 10 Brad Sawatzky 1
2 Hall C KPP Detector operational: events recorded with a > 2nA electron beam at > 6 GeV beam energy (3 pass). 1.Detector running for 8 hours recording data from all subsystems. 2.Screenshots of beam status and/or accelerator e-log entries demonstrating electron beam current and energy. 3.Data showing relative timing of trigger, tracking, and particle identification in detector sybsystems. 4.Figures demonstrating charged-particle tracks from position-sensitive detectors. 5.Particle identification plots using signals from calorimetry and Cerenkov detectors. 2
3 Hall C KPP Run Plan (Overview) Beam Requirements: Energy: > 6 GeV/c Current: 5 10 μa Polarization: N/A SHMS Settings: Angle: 15 Momentum: 6 GeV/c See also: Initial Steer-up: <ATLis 16570> Goals: Establish beam to Dump with SHMS magnets at production settings. Snapshots results to satisfy KPP2 Initial Hall C Beamline, Raster, Instrument. Checkout Goals: Establish beam positioning on target Satisfy KPP 3, 4, 5 on BeO/Carbon foil Clock starts on 8 hours of recorded data for KPP1 3
4 Hall C KPP Run Plan (Overview) Initial Hall C Beamline, Raster, Instr. Checkout (cont...) DAQs are running; Solid target in place (BeO, C) Online shift-crew will proceed with checkout procedure while dedicated Offline shift-crew will use data to satisfy KPP 3, 4, 5 (detector timing, energy tracks, PID from SHMS systems) Procedure (rough bullets): View beam on BeO target; log target cam snapshot Image Carbon-Hole target with rastered beam and raw SHMS triggers (tuned track reconstruction not required.) Begin Detector Checkout and Spect. Optics Program Goals: Continued data taking on target... Offline shift-crew will use data to satisfy KPP 3, 4, 5 (if not already accomplished) At 8 hours of accumulated data, log KPP 1 completed ~ Hall C Key Performance Parameters Established ~ 4
5 Initial Steer-up MCC driven process ATLis 16570» Tune beam» No target» Raster OFF Goals Beam to dump w/ SHMS magnets at production settings Satisfy KPP #2 Screenshots of beam status and/or accel elog entries demonstrating beam current and energy. Hall C will log: 5
6 Initial Raster, Instrum. Checks Goals Determine beam is roughly centered in beam pipe and on target Begin collecting data for KPP 3, 4, 5 Requires SHMS DAQ, YAG viewer; HARPs Targets: BeO, Carbon-Hole Beam: 5 10 ua CW (maximum) Online shift crew will start/stop DAQs Harp scans Raster checkout Beam position checks Target align. checks Offline crew focus on data analysis for KPP 3, 4, 5 6
7 Begin Spectrometer Checkout Goals Continue collecting data for KPP 3, 4, 5 Collect data for gain matching, time offset calibrations, track recon. params Evaluate/optimize spectrometer magnet optics tune Requires SHMS (HMS) DAQ Targets: Carbon foil Beam: 5 10 ua CW Online shift crew will Execute run plans being compiled here:» Detector Commissioning» Optics Working Group» Optics Commissioning Offline crew focus on data analysis for KPP 3, 4, 5 first, spectrometer commissioning second NOTE: KPP requirements are a natural early byproduct of the Commission run-plans. 7
8 Spectrometer Checkout (cont...) [KPP 3] Rel. timing of trigger, tracking, PID in detectors Timing» TDC spectra from hodoscopes, calor, Cerenkov PID» de vs E in Calorim» Cerenkov ADC vs Calorim PID 8
9 Spectrometer Checkout (cont...) [KPP 4] Charged particle tracks from wire chambers Event display software shows hits in hodoscopes w/ track overlay from analyzer reconstruction [KPP 5] PID plots from Calorim. and Cerenkov See also: KPP 3 9
10 Spectrometer Checkout (cont...) [KPP1] Detectors running for 8 hours recording data from all subsystems. Snapshot of runstart/stop logbook entries Snapshot of timestamped list of data files 10
11 KPP Goals Completed Detector operational: events recorded with a > 2nA electron beam at > 6 GeV beam energy (3 pass). Detector running for 8 hours recording data from all subsystems. Screenshots of beam status and/or accelerator e-log entries demonstrating electron beam current and energy. Data showing relative timing of trigger, tracking, and particle identification in detector subsystems. Figures demonstrating charged-particle tracks from position-sensitive detectors. Particle identification plots using signals from calorimetry and Cerenkov detectors. 11
12 Continue to Detector Commissioning... Shift focus to include HMS checkout as well Gain matching and energy calibration of detectors Fine tune timing offsets Optics calibration and studies Efficiency / Deadtime studies Momentum scans Cross check SHMS response vs. HMS Etc... Run with beam as long as permitted in Spring. More rigorous offline studies over Summer. Return in Fall to complete any remaining Commissioning items and begin experimental program. 12
13 Personnel / Experts On-call Noble Gas Cherenkov D. Day (UVa)» M. Yurov, et al. Drift Chambers E. Christy (Hampton)» D. Biswas, et al. Aerogel Cherenkov T. Horn (Cath. U)» A. Mkrtchyan, et. al Calorimeter H. Mkrtchyan (Yerevan)» V. Tadevosyan, A. Asaturyan Heavy Gas Cherenkov G. Huber» W. Li Hodoscopes G. & M. Niculescu (JMU) A. Ahmidouch (SUNO) S. Malace (NSU) Hall C and Hall A Staff Scientists + Post Docs DAQ, Beamline HMS Detectors General Support 13
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