Beamtime FY21

Performance Metrics: User Time for FY21 Commissioning Period 

 

The beam parameters in these summaries, when present, are obtained automatically from the accelerator control system. They have not been vetted and particularly during this commissioning period, treat with caution.

 

Experiment: E305 - Beam filamentation and bright gamma-ray bursts
Shift Start: 2021-08-13 13:00:00
Requested Beam Time (hours)​: 15.0 ​​ Charge delivered in S20 (E10 electrons/bunch): ​ Not Available
​Useful Beam Time (hours): 13.0​ Horizontal beam size in S20 (rms, microns): 46.0
Unscheduled Accelerator Downtime (hours):​ 1.0 Vertical beam size in S20 (rms, microns): 23.08
Unscheduled User Downtime (hours): ​1.0 ​ Bunch length (rms, microns)​: 23.64 ​​
Total delivered+downtime+user off (hours):​ 15.0
​ Brief Summary:

We got a lot of useful data that will help us characterize the the E305 diagnostics!

     

    Experiment: E320 - Probing Strong-field QED at FACET-II
    Shift Start: 2021-08-13 16:00:00
    Requested Beam Time (hours)​: 14.0 ​​ Charge delivered in S20 (E10 electrons/bunch): ​ Not Available
    ​Useful Beam Time (hours): 12.0​ Horizontal beam size in S20 (rms, microns): 46.0
    Unscheduled Accelerator Downtime (hours):​ 1.0 Vertical beam size in S20 (rms, microns): 23.08
    Unscheduled User Downtime (hours): ​1.0 ​ Bunch length (rms, microns)​: 23.64 ​​
    Total delivered+downtime+user off (hours):​ 14.0
    ​ Brief Summary:

    Concluded calorimeter/PMT and EDC screen checkout. Performed detailed background measurements for the PMTs.

       

       

      Experiment: E305 - Beam filamentation and bright gamma-ray bursts
      Shift Start: 2021-08-12 16:00:01
      Requested Beam Time (hours)​: 12.0 ​​ Charge delivered in S20 (E10 electrons/bunch): ​ Not Available
      ​Useful Beam Time (hours): 3.0​ Horizontal beam size in S20 (rms, microns): 46.0
      Unscheduled Accelerator Downtime (hours):​ 11.0 Vertical beam size in S20 (rms, microns): 23.08
      Unscheduled User Downtime (hours): ​0.0 ​ Bunch length (rms, microns)​: 23.64 ​​
      Total delivered+downtime+user off (hours):​ 14.0
      ​ Brief Summary:

      Beam was recovered at around 3am and provided a few hours of very useful beamtime. Goal of scanning the beam across different target materials and thickness while viewing the photon signal on the gamma screens was achieved.

         

         

        Experiment: E305 - Beam filamentation and bright gamma-ray bursts
        Shift Start: 2021-08-12 16:00:01
        Requested Beam Time (hours)​: 9.0 ​​ Charge delivered in S20 (E10 electrons/bunch): ​ Not Available
        ​Useful Beam Time (hours): 0.0​ Horizontal beam size in S20 (rms, microns): Not Available
        Unscheduled Accelerator Downtime (hours):​ 8.5 Vertical beam size in S20 (rms, microns): Not Available
        Unscheduled User Downtime (hours): ​0.0 ​ Bunch length (rms, microns)​: Not Available ​​
        Total delivered+downtime+user off (hours):​ 8.5
        ​ Brief Summary:

        No beam delivered. Tested software for data acquisition and on the fly data analysis.

           

           

          Experiment: E305 - Beam filamentation and bright gamma-ray bursts
          Shift Start: 2021-08-12 00:00:00
          Requested Beam Time (hours)​: 2.0 ​​ Charge delivered in S20 (E10 electrons/bunch): ​ Not Available
          ​Useful Beam Time (hours): 2.0​ Horizontal beam size in S20 (rms, microns): 46.0
          Unscheduled Accelerator Downtime (hours):​ 0.0 Vertical beam size in S20 (rms, microns): 23.08
          Unscheduled User Downtime (hours): ​0.0 ​ Bunch length (rms, microns)​: 23.64 ​​
          Total delivered+downtime+user off (hours):​ 2.0
          ​ Brief Summary:

          We got more data.

             

             

            Experiment: E305 - Beam filamentation and bright gamma-ray bursts
            Shift Start: 2021-08-11 16:00:00
            Requested Beam Time (hours)​: 8.0 ​​ Charge delivered in S20 (E10 electrons/bunch): ​ Not Available
            ​Useful Beam Time (hours): 0.5​ Horizontal beam size in S20 (rms, microns): Not Available
            Unscheduled Accelerator Downtime (hours):​ 7.5 Vertical beam size in S20 (rms, microns): Not Available
            Unscheduled User Downtime (hours): ​0.0 ​ Bunch length (rms, microns)​: Not Available ​​
            Total delivered+downtime+user off (hours):​ 8.0
            ​ Brief Summary:

            Despite not getting beam to dump for very long, this was a very productive shift. We demonstrated the basic functionality of our tools and diagnostics.

               

               

              Experiment: E326 - Non-Intercepting Diagnostics for High Intensity Beams and Computer Control
              Shift Start: 2021-07-23 16:00:00
              Requested Beam Time (hours)​: 6.0 ​​ Charge delivered in S20 (E10 electrons/bunch): ​ Not Available
              ​Useful Beam Time (hours): 6.0​ Horizontal beam size in S20 (rms, microns): 46.0
              Unscheduled Accelerator Downtime (hours):​ 0.0 Vertical beam size in S20 (rms, microns): 23.08
              Unscheduled User Downtime (hours): ​0.0 ​ Bunch length (rms, microns)​: 23.64 ​​
              Total delivered+downtime+user off (hours):​ 6.0
              ​ Brief Summary:

              On this shift the E326 experiment tested out experimental and machine settings by examining the change in edge radiation stripe width as a function of quadrupole strength. E326 also tested and debugged the Data Acquisition (DAQ) system used by all experiments at FACET-II.

                 

                 

                Experiment: E326 - Non-Intercepting Diagnostics for High Intensity Beams and Computer Control
                Shift Start: 2021-06-26 16:00:00
                Requested Beam Time (hours)​: 3.5 ​​ Charge delivered in S20 (E10 electrons/bunch): ​ Not Available
                ​Useful Beam Time (hours): 3.5​ Horizontal beam size in S20 (rms, microns): 46.0
                Unscheduled Accelerator Downtime (hours):​ 0.0 Vertical beam size in S20 (rms, microns): 23.08
                Unscheduled User Downtime (hours): ​0.0 ​ Bunch length (rms, microns)​: 23.64 ​​
                Total delivered+downtime+user off (hours):​ 3.5
                ​ Brief Summary:

                The goal for this shift was to perform a preliminary checkout of the E326 dogleg magnetic and visible optics. We were able to see edge radiation from both magnet edges and figure out which edge was which as well as bring the two edges together. The information collected will be used to update and improve the experimental setup to increase photon count and potentially see interference on the next shift.