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start [2013/12/14 18:21] pereira |
start [2016/09/26 13:08] pereira [Technical Aspects of the S800] |
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* [[Electronics]] | * [[Electronics]] | ||
* [[Data Acquisition (DAQ)]] | * [[Data Acquisition (DAQ)]] | ||
- | * [[S800 | + | * [[S800 |
* Coupled Devices | * Coupled Devices | ||
* [[Types of Experiments]] | * [[Types of Experiments]] | ||
===== Operation of the S800 ===== | ===== Operation of the S800 ===== | ||
+ | * [[Troubleshooting]] | ||
* [[Preparation for tuning the S800]] | * [[Preparation for tuning the S800]] | ||
* [[Tuning the S800 (XDT)]] | * [[Tuning the S800 (XDT)]] | ||
* [[During experiments]] | * [[During experiments]] | ||
* [[Division of operation responsibilities]] | * [[Division of operation responsibilities]] | ||
+ | * [[Radiation safety in the S3 vault|Accessing and securing the S3 vault]] | ||
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- | A double peak structure will appear in the TDC for the S800 trigger between the coincidence events and the singles events; the groups are separated by 25 ns because of the delay introduced by the downscaler used for the singles | ||
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- | Followup | ||
- | Before leaving beam with experimenters | ||
- | Set up current trip points on Linux HV controls | ||
- | Values used for K-48 | ||
- | 5 for CRDC and Ion Chamber anodes and intermediate image ppacs | ||
- | 50 for CRDC drifts | ||
- | 80 for IC drift | ||
- | Ensure alarms are running | ||
- | Make sure Linux HV GUI alarms are enabled | ||
- | Make sure threshold on isobutane level is set up (not currently connected to alarms because they give too many false alarms when communication is lost) | ||
- | All logs are being recorded | ||
- | There is no log file for biases controlled by Labview | ||
- | Linux HV | ||
- | LabView gas handling system | ||
- | Note in logbook | ||
- | Scintillator biases | ||
- | IC gate biases | ||
- | Post reference printouts for experimenters | ||
- | HV status: | ||
- | Gas handling system status: | ||
- | Create window configuration with summing regions to make it easier for experimenters to track efficiency/ | ||
- | Setting up coincidences for additional reaction settings in an experiment | ||
- | Do not need to redo coincidence settup if secondary beam does not change | ||
- | Might need to redo coincidence setup if secondary beam changes drastically | ||
- | To watch during experiment | ||
- | Look for isobutene running out – messes up data over several hours | ||
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- | Experimenters responsibilities | ||
- | Implementing dE- or TOF-based corrections is part of EXR | ||
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- | More detail needed | ||
- | Minimum rates required for coincidence setup | ||
- | Selection of appropriate substitute reactions for coincidence setup | ||
- | How to feel comfortable that there will not be a problem with FP detector gases running out | ||
- | Starting alarms | ||
- | Starting logging | ||
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- | Not covered | ||
- | Details of mask calibration | ||
- | Details on implementing dE- and TOF-based corrections | ||
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- | Index | ||
- | Introduction | ||
- | Experiment Types | ||
- | Experiment planning | ||
- | NMR | ||
- | Operations software (Barney, QTChan, BLkq...) | ||
- | Tracking setup | ||
- | Device Tunning | ||
- | Mask calibration | ||
- | Beam blocker use | ||
- | Setting optimization (tweaks) | ||
- | Electronics | ||
- | DAQ | ||
- | Analysis | ||
- | Operation Environment System Overview | ||
- | Dump Switches | ||
- | Experiment preparation (S800 checklist prior to experiment) | ||
- | Login strategy | ||
- | Detectors (TPPACs, CRDCs, IC, OBJ_SCI, S800_SCI, Hodoscope) | ||
- | Overview | ||
- | HV | ||
- | Gas Handling system | ||
- | Vacuum control | ||
- | Special considerations for each detector | ||
- | Shimming OBJ | ||
- | Replacing OBJ | ||
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- | Advance preparations | ||