Facility for Advanced Accelerator Experimental Tests

Performance Metrics: User Time for FY23

Performance Metrics: User Time for FY23  

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: E300 - Energy Doubling of Narrow Energy Spread Witness Bunch while Preserving Emittance with a High Pump-to-Witness Energy Transfer Efficiency in a Plasma Wakefield Accelerator
Shift Start: 2022-12-09 18:00:00
Requested Beam Time (hours)​:​ 64.0 ​​ Charge delivered in S20 (E10 electrons/bunch):​ ​ Not Available
​Useful Beam Time (hours): 64.0​ 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):​ ​64.0 ​ ​
​ Brief Summary:

The IP pressure was shown to be stable in both long term operation using the differential pumping system, and stable against any single pump failure within the system. This demonstrates that the differential pumping system can safely support operating the lithium oven without solid Be-windows in the beamline.

     

    Experiment: E301 - Tailored Plasma Source for Emittance Preservation in Plasma Wakefield Acceleration and High-Brightness Plasma-Injected Beams
    Shift Start: 2022-12-08 18:00:00
    Requested Beam Time (hours)​:​ 7.0 ​​ Charge delivered in S20 (E10 electrons/bunch):​ ​ Not Available
    ​Useful Beam Time (hours): 7.0​ 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):​ ​7.0 ​ ​
    ​ Brief Summary:

    Successful shift where we demonstrated raster scan technique and observed curious beam-ionized argon.

       

       

      Experiment: E327 - Virtual diagnostic for phase space prediction and customization at FACET-II
      Shift Start: 2022-12-08 00:54:45
      Requested Beam Time (hours)​:​ 5.0 ​​ Charge delivered in S20 (E10 electrons/bunch):​ ​ Not Available
      ​Useful Beam Time (hours): 7.0​ 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):​ ​0.5 ​ Bunch length (rms, microns)​:​ 23.64 ​​
      Total delivered+downtime+user off (hours):​ ​7.5 ​ ​
      ​ Brief Summary:

      Collected first data measuring bunch length in injector and correlating variation with other injector parameters

         

         

        Experiment: E301 - Tailored Plasma Source for Emittance Preservation in Plasma Wakefield Acceleration and High-Brightness Plasma-Injected Beams
        Shift Start: 2022-12-06 19:00:00
        Requested Beam Time (hours)​:​ 4.0 ​​ Charge delivered in S20 (E10 electrons/bunch):​ ​ Not Available
        ​Useful Beam Time (hours): 4.0​ 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):​ ​4.0 ​ ​
        ​ Brief Summary:

        Remote, concurrent, laser alignment through both the EOS setup and the axicon lens was successfully completed.

           

           

          Experiment: E300 - Energy Doubling of Narrow Energy Spread Witness Bunch while Preserving Emittance with a High Pump-to-Witness Energy Transfer Efficiency in a Plasma Wakefield Accelerator
          Shift Start: 2022-12-06 19:00:00
          Requested Beam Time (hours)​:​ 1.0 ​​ Charge delivered in S20 (E10 electrons/bunch):​ ​ Not Available
          ​Useful Beam Time (hours): 1.0​ 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):​ ​1.0 ​ ​
          ​ Brief Summary:

          Dispersive quad scan data was collected of offline analysis with the beam in pencil beam mode and with the IP dispersion minimized.

             

             

            Experiment: E326 - Non-Intercepting Diagnostics for High Intensity Beams and Computer Control
            Shift Start: 2022-12-02 18:00:00
            Requested Beam Time (hours)​:​ 4.0 ​​ Charge delivered in S20 (E10 electrons/bunch):​ ​ Not Available
            ​Useful Beam Time (hours): 6.5​ 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):​ ​6.5 ​ ​
            ​ Brief Summary:

            We are trying to eliminate systematics in our non-destructive diagnostic by collecting more data. We also investigated improving the ML model by extending the range of values we use to collect data.