Transversity Experiment Pre-Beam Checklist Xiaodong Jiang 07/21/2008. (Please don't erase items. Add comments to the items when they are done. Add new items at the end of each section.) 1. Beamline, Compton, Lumi-detectors and beam-dump. 1.1 Transversity beam delivery specifications, communication to MCC (Xiaodong Jiang + J.-P. Chen with MCC). 1.2 Beam ramp-up procedures on polarized He3 target. (J.-P. Chen with MCC). 1.3 Confirm final beam energy for delivery (one- two- and five-pass), update runplan on kinematics settings (Xiaodong Jiang). 1.4 Hall A harp check out, harp-scan procedures (Arun Saha). 1.5 Hall A BPM check out. BPM calibration need and procedures. Calibration constants and online software checkout for spot++ (XXX.XXX) 1.6 Decide raster pattern (J.-P. Chen), specify beam size on polarized He3 cell (xxx mm by xxx mm), raster hardware work (Hall A staff), software control and decoding. 1.7 Compton detector checklist (Sirish Nanda and CMU group). Beam tuning procedures for Compton (Sirish with MCC). Compton commissioning run plan. Setup for Compton running during production, local experts for trouble shooting. 1.8 Moller preparation for one- and five-pass beam (Eugen Chudakov). Production runs with Moller quards ON for five-pass (?). Need for a spin-dance (?). Consistecy checks with Hall B and Hall C measurements. Determine absolute beam helicity signs in Hall A, for one- and five-pass beam. Runs with a large beam charge asymmetry (?). Beam half-wave plate IN/OUT changes during data taking. Winne filter angle and Beam half-wave plate status in EPICS data stream. 1.9 Set trip limits for target and beam-dump ion chambers. 1.10 Lumi detector check out. HAPPEX DAQ, beam charge feedback checkout. 1.11 Lumi readout by transversity DAQ. Synchronization and consistency check between Lumi, HRS scalers and BigBite scalers (Bob Michaels + Joe + Kalyan). 1.12 A mu-metal cylinder mounted around the first sections of downstream beam pipe (Doug). 1.13 Procedures for testing BigBite's steering of beam at one-pass (Doug). 1.14 Beamline survey, relations to target (?). 1.15 Beam charge monitors checkout, fix down*3 problem (Arun Saha). Confirm calibration constants in online software (Arun Saha). 2. Targets. 2.1 Target magnetic field measurement (Yi Qiang) 2.2 Target holding field direction measurements with compass. 2.3 Target cell alignment and survey. 2.4 Target position decoding, calibration of target movement. 2.5 NMR and EPR working. 2.6 Target cooling jet working. 2.7 Target slow control variables in EPICS data stream. Target temperture sensors working and calibrated. 2.8 Target spin-flip tested, integrated with DAQ. Nominal expected target polarization with 20 minutes target spin flip (?). Keep flipping target spin regardless of beam and DAQ status (?). Roughly balence the integrated beam charge for spin-up vs spin-down runs(?). A detailed commisioning run plan and checklist for spin-flip test with beam. (Trans. in-plane polarization, one-pass long. polarized beam double-spin asymmetry, at Delta-production kinematics). 2.9 Reference cell leak check. Reference cell control tested for He3, H2, N2 gas, pressure transducers cross-calibrated (Todd) 2.10 Target safty documents in place. 2.11 Procedures of broken cell recovery, agreed with RADCON. 2.12 A checklist of laser optics. 2.13 Rotate target to "Long+" and "Long-" for elastic He3 runs at one-pass (?). 3. Let HRS. 3.1 Left HRS free to move between 16 degree and ~60 degree. Pins on the floor to stop it to move beyon 16 degree. 3.2 Magnet control. Q3 control fixed. Quards cycling procedures. 3.3 Procedure of polarity change, minimize time taken (Ed Folts). 3.4 Sieve slit insert ready. Survey positions. Reproducebility of location. 3.5 Front vaccum window ON before beam comes (Ed Folts). Front vaccum window cover removed right before taking data (Ed Folts). 3.6 Detector cosmic ray runs (Vince+Alex+INFN). All detector channels checked. A final layout of HRS detectors, specify their postions (Vince with Al). 3.7 Timing offsets of S1 and S2M determined. Cosmic ray beta spectrum make sense. (Vince). 3.8 Verify the initial optics data base for extended target (Vince). 3.9 Initial time-of-flight corrections in place (Vince). 3.10 RICH commissioning software ready. Prepared to murge into Hall A analyzer. (INFN: XXX.XX) 3.11 A1 detector PMT HV gain matched. Software gain-match tool ready. Check dry gas purging (Vince+YouCai). 3.12 Short gas Cherenkov PMT HV gain-matched. Software gain-match tool ready (Vince+Chiranjib). 3.13 Lead glass PMT HV gain matched, software gain-match tool ready (Vince). 3.14 A detailed commisioning run plan in place for each detector. Specify the minimum conditions to be satisfied before moving into production. 4. BigBite. 4.1 A final detector configuration plot, with each detector's position laid out (Doug with Al). 4.2 Verify BigBite's final position in the hall. Survey of BigBite and the detector positions (Doug with JLab survey group). 4.3 BigBite dipole magnet control, work to 710 A. BigBite magnetic probe in EPICS data stream (Doug). 4.4 BigBite dipole magnet insert pieces in place, both on the bottom and at the top (Doug with Ed Folts). 4.5 Front sieve slit mounted, moving mechenisim and its reproducebility checked. Sieve slit position surveyed. 4.6 Detector package cosmic ray checked. Clearly show three-chamber tracking correlated with lead-glass hits. 4.7 Wire chamber HV control. Threshold voltage control works from the counting house. Voltages and other variables into the EPICS data stream. 4.8 Gas checkout procedures for wire chambers, gas Cherenkov. Connect dry N2 gas and flush PMT houses. 4.9 Detecors' relative position surveyed. Initial position offsets put into analyser. 4.10 Intitial optics database set up for 1.5 meter drift. Software tools for analysing optics data. 4.11 Scintillator time offsets determined. Initial flight path corrections for time-of-flight in place for electrons in BigBite (Vince). 5. DAQ, time-of-flight, scalers, slow control and online scripts. 5.1 Time-of-flight logic pulser checked. Verify calculation of intrinsic delays for H(e,e'p) one-pass and two-pass beam Verify intrinsic delays for production kinematics. 5.2 Beam RF timing signal readout. 5.3 High resolution TDC for BigBite scintillators (50 ps resolution). A list of actions/tests for shortening the time-of-flight window at the beginning of production. 5.4 Cosmic gain-match checked for BigBite pre-shower and shower. 5.5 Remote control of trigger threshold. Two-level trigger threshold settings, a low and a high (?). 5.6 Scalers working (Kalyan + Bob Michaels). Scaler display working in the counting house. 5.7 Online dead time calculation make sense from the scalers. Minimize DAQ readout time, reduce deadtime (Bob Michaels + Kalyan). 5.7 EPICS variables into the data stream. A list of online EPICS charts to watch by the shift workers. 5.8 Modify: Beginning of run script and End-of-run script. Automatic entry to Halog. 5.9 Raw data file size limit (8 GB now ?), no file splitting. File name convention: e06010_xxxx.dat. Online data disk spaces. Scripts for copying raw data file to silo. Verify no recorded data get lost (Bob Michaels). 5.10 A complete tetector map file. 6. Documentations and on-line instructions. 6.1 Run sheet and updates (Xiaodong Jiang). 6.2 Shift check-list, changes and updates (Xiaodong Jiang). 6.3 Shift worker's how-to webpage, set up for transversity and update often. 6.4 Shift worker training, Hall A walk-through. Target operators training and certification (J.-P. Chen). 6.5 Shift worker rules, and shift worker's food in the counting house. 6.6 Experiment documentations, RSAD (done), ESAD, COO etc. Folders in the counting house. 6.7 A final Hall A floor layout for Transversity (Xiaodong Jiang with Al). 7. Transversity start-up conditions on Oct.7th, 2008. 7.1 One-pass beam to Hall A, polarized. 7.2 Left HRS at 16 degree, negative mode, quards cycled. P_HRS=xxx.xx GeV/c for C12 quasi-elastic kinematics. 7.3 BigBite at 30 degree, beam right. 1.5 meter drift distance from center of target to the front surface of BigBite magnet. Magnet set to NEGATIVE mode, with 710 A current. 7.4 Target position: EMPTY. Ready to move to: Carbon hole, Carbon multi-foil, Reference cell. 8. Services and responsibilities 8.1 Safty and experiment documents. RSAD (Done) ESAD, COO, etc (J.P. Chen, deadline: 10 days before Oct. 7th, 2008). 8.2 Wiki webpage: policing, clearing-up and backing-up (Yi Qiang). 8.3 Traneversity collaboration web page, related physics papers and collaboration meeting records (Kalyan). 8.4 Shift sign-up script setup (Alex). Daily shift changes and updates (Xiaodong Jiang + Jin Huang). Experts' shifts at commisioning, and production (Xiaodong Jiang). 8.5 Run plan and updates (Xiaodong Jiang). 8.6 Run coordinators and backup person update (Xiaodong Jiang). 8.7 A list of contact for technical experts (Jin Huang). A list of collaborators and their institutions, as shifts being singed-up (Jin Huang and Xiaodong Jiang). 8.8 A list of good runs with comments, daily updates (XXX.XXX) Keep track of beam-charge, number-of-good-events. Decide when to change HRS polarity, target spin orientations. 9. Online replay. 9.0 Who's in charge ? 9.1 Mantain the official version of transversity analyzer. Software setup, update. Online instructions. Standard spectrum. 10. Spare parts and emergency procedures. 10.1 Two spare LeCroy HV crate tested and working. 10.2 Spare wire chamber HV modules tested. 10.3 Two spare FASTBUS crates and power supplies tested. Network cards. 10.4 Spare threshold power supplies for BigBite wire chambers. Spare PreAmp cards, level translators, long and short ribbon cables. Spare LeCroy 1877 TDCs tested. 10.5 A list of target spare parts. 10.6 Spare lasers and spare optics fibers. 10.7 Working target cells. Referece cells. Procedures of replacing cells and re-alignment. 10.8 Procedures of recovery after power failures, hurricans/earth-quarks etc. Save initial setup files. Restart GUI. Reboot IOCs. Control computers. Target computer. Spin-flip. Emergency contact list. ... 10.10 At what point we should give up. Too bad we can't have production runs because: Target can not be polarized to 20% (?) polarization. Spin-flip doesn't work. No coincidence T5 triggers or can't see coin-TOF peak. (Double check coincidence rates with Hall C semi-inclusive data at x=0.3) (Xiaodong Jiang and Kalyan Allada, specify a range of acceptable rates). DAQ is too slow, can't take 100 Hz (?) coincidence trigger rate. BigBite trigger doesn't work. Wire chambers can not operate, too much background or no clear track found. Chambers are too noisy, raising threshold on PreAmp cards doesn't work. No spare parts, can't run FASTBUS. Unknown DAQ problems. Error flags can not be understood. Beam trips too often at five-pass (more than 10 times an hour ? ). 10.11 After the 10-days commisioning period, extensive repair work on the following items have to wait till the next scheduled down time: i. BigBite gas Cherenkov. ii. Individual pre-shower and shower blocks. iii. Less than three wire planes in BigBite chambers iv. HRS RICH detector. v. Replacement of PMT in HRS gas Cherenkov or A1. vi. Less than four failed Lumi-detctors. A Timeline for Transversity Preparation Work 1. Oct. 7th: All sub-systems ready to take beam. 2. Oct. 1st: Integrated test starts for polarized target and DAQ. 3. Sept. 15th: Cosmic ray test for left-HRS including RICH. Coincidence trigger tested with a pulser. BigBite detectors in their final place, all cables connected. Lumi detectors readout in DAQ. Scalers working. 4. Sept. 1st: BigBite wire chamber readout test done, all channels working. BigBite gas Cherenkov installed into the detector package. HRS detector read out done without RICH. 5. Aug. 15th: BigBite gas Cherenkov's problem understood, solutions worked out. Missing mirror installed. BigBite wire chambers readout test started. Polarized target field measurement finished. 6. Aug. 1st: BigBite wire chambers installed into detector package, positions surveyed. Target coil installation finished. All target design finalized. Parts on order. 7. July 21st: Collaboration meeting. Identify all missing items. Clearify responsibilities. A list of designs need to be finished. A final preparation schedule for all sub-systems to follow. Update the installation schedule.