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AD SLACPortal > Accelerator Research Division > FACET User Facility

PART ONE (Oct-Dec 2013)

The FY14 FACET User Run has been divided into two parts. The first part ran from October - December 2013. The second part runs from February 2014. For beam time reports from the first part, please follow the link above.

 

Performance Metrics: User Time

Experiment: T-503 NORTH DAMPING RING MEASUREMENTS
Date: 2/13/2014
 
​Time beam delivered (hours): ​8 Time Promised (hours):​ ​8
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0.5 ​User off (hours): ​0.5
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​9
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 1e10 0 ​0 0 0
​Requested: Not in request Not in request Not in request Not in request Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 31,3.6 31,6.6​ 79,7.2 Unmeasured Unmeasured​
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​Unmeasured Bunch length requested (microns):​ ​ ​​Not in request
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​100
 
Summary from User:
We calibrated the streak camera and successfully measured parameters of the beam in the north damping ring.
 
 
Experiment: E-210 TROJAN HORSE PLASMA WAKEFILED ACCELERATION
Date: 2/28/2014
 
​Time beam delivered (hours): ​0.5 Time Promised (hours):​ ​0.5
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​0.5
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 8.6e9 9.0e9 8.8e9​ 8.5e9​ 9.1e9
​Requested: Not in request Not in request Not in request Not in request Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 33,2.2 25,1.8​ 41,2.9 37,5.0 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​Not measured Bunch length requested (microns):​ ​ ​​Not in request
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​100
 
Summary from User:
Could not verify beam vector through IPOTR1 and 2 as IPOTR2 camera was not working.  Rebooted PM08 crate, still nothing.  Beam was off IPOTR1 by ~250 microns horizontally.  Steered to correct, but couldn't confirm correct vector.  Still no (increased, OTR-based) signal on photodiode.  

 

Experiment: E-211 CERN BEAM BASED ALIGNMENT
Date: 3/3/2014
 
​Time beam delivered (hours): ​11 Time Promised (hours):​ ​12
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 1 ​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​12
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10 2.0e10​ 2.0e10​ 1.9e10​ 2.0e10
​Requested: 2e10 2e10 2e10 Not in request 2e10
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: ​41,2.0 31,2.1 62,5.0​ 69,3.9 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​Unmeasured Bunch length requested (microns):​ ​ ​​Not in request
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​25
 
Summary from User:
Analyzed orbit as function of charge.  Measured R0 and R1.  Performed one WFS steering. Vertical  wakefields seem reduced, results to be analyzed.
 
Experiment: E-211 CERN BEAM BASED ALIGNMENT
Date: 3/6/2014
 
​Time beam delivered (hours): ​10 Time Promised (hours):​ ​10
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 1 ​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​11
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10 2.0e10 2.0e10 0 2.0e10
​Requested: 2e10 2e10 2e10 0 2e10
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: ​43,2.0 28,5.4 46,3.5 78,6.7 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​Unmeasured Bunch length requested (microns):​ ​ ​​Not in request
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​unrecorded
 
Summary from User:
Achieved important improvements in the vertical emittance by WFS correction. Attempted to measure the emittance/weight plot. Horizontal plane seems to be dominated by other effects such as dispersion.
 
 
Experiment: E-211 CERN BEAM BASED ALIGNMENT
Date: 3/8/2014
 
​Time beam delivered (hours): ​10 Time Promised (hours):​
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0.5 ​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​10.5
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10 2.0e10 2.0e10 0 1.7e10
​Requested: 2e10 2e10 2e10 0 2e10
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: ​40,1.8 32,2.9 37,2.2 70,5.8 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​Unmeasured Bunch length requested (microns):​ ​ ​​Not in request
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​Unreported
 
Summary from User:
We measured the response of a dispersive orbit in sectors 2-4.  We made significant improvements in the speed of our response data collection, and of our steering. We implemented a new feed-forward system to stabilize the orbit after the correction. 
 
 
Experiment: E-211 CERN BEAM BASED ALIGNMENT
Date: 3/9/2014
 
​Time beam delivered (hours): ​8 Time Promised (hours):​ ​12
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 3 ​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​11
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10 2.0e10 Unmeasured 0 1.8e10
​Requested: 2e10 2e10 2e10 0 2e10
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 38,2.3​ 50,2.3 50,4.2 71,9.5 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​Unmeasured Bunch length requested (microns):​ ​ ​​Not in request
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
We measured the orbit, wake field and dispersion responses in Secs. 5-9.  Applied combined wake field correction and dispersion correction, with different parameters. No machine rate limiting was observed during corrections (stable correction).  Limited emittance reduction, with respect to the golden orbit, was observed. At 6:30 am we asked the operators to restore the machine to its initial status.
 
 
Experiment: E-210 TROJAN HORSE PLASMA WAKEFILED ACCELERATION
Date: 3/13/2014
 
​Time beam delivered (hours): ​4.5 Time Promised (hours):​ ​5
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0.5 ​User off (hours): ​0.5
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​5.5
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10 2.0e10 2.0e10 2.0e10 2.1e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 38,3.2 43,unmeasured 39,5.4 63,8.7 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​30 Bunch length requested (microns):​ ​ ​​30
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​91
 
Summary from User:
We have adjusted the timing between ebeam and IR laser by observing laser signal and X-ray generated by ebeam through our photodiode. EOS experiment needs further improvement.  
 
 
Experiment: E-200 PLASMA WAKEFIELD ACCELERATION
Date: 3/14/2014 OWL
 
​Time beam delivered (hours): ​1.6 Time Promised (hours):​ ​2
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0.4 ​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​2
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 1.9e10 2.0e10 2.0e10 2.0e10 2.0e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 38,3.2 43,unmeasured 39,5.4 63,8.7 Not measured
​Requested: Not in request Not in request Not in request​ 70,10 Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​30 Bunch length requested (microns):​ ​ ​​Not in request
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​Unreported
 
Summary from User:
The sYAG dispersion scan was performed first. We then ran into issues with the jaws and notch collimator regarding their range of motion relative to the beam orbit. An appropriate slit width and range for the tomographic scan was still determined. The FACET TCAV calibration and FACET TCAV BLM were both performed by ops with no problems. The E200 DAQ is not in working condition. It was not fixed before the end of the shift. Thus, the E200 TCAV BLM and the tomographic slit scans were not performed. Troubleshooting will of the E200 DAQ will continue until it works. 
 
 
Experiment: E-200 PLASMA WAKEFIELD ACCELERATION
Date: 3/14/2014 SWING+OWL
 
​Time beam delivered (hours): ​5 Time Promised (hours):​ ​10
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): ​5
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​10
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10 2.0e10 2.1e10 2 bunches: 3.3e9, 7e9 1.9e10
​Requested: Not in request Not in request Not in request 2.0e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 38,2.4 36,3.0 39,3.7 63,11 Not measured
​Requested: Not in request Not in request Not in request​ 70,10 Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​2 bunches: 21, 25 Bunch length requested (microns):​ ​ ​​Not in request
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
E200 pre-experiment check-out.  All nominal. 
 
 
Experiment: E-200 PLASMA WAKEFIELD ACCELERATION
Date: 3/15/2014
 
​Time beam delivered (hours): ​6.1 Time Promised (hours):​ ​12
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​6.1
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 1.9e10 1.9e10 1.9e10 Not recorded 1.8e10
​Requested: Not in request Not in request Not in request Two bunches: 9e9,3e9 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 36,2.6 33, not measured 42, 4.7 61, 6.2 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​Not recorded Bunch length requested (microns):​ ​ ​​Two bunches with 110-140um separation
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
E200 DAQ performed great!  PWFA experiment with laser is as good as it can get with the current beam condition.
 
 
Experiment: E-200 PLASMA WAKEFIELD ACCELERATION
Date: 3/16/2014
 
​Time beam delivered (hours): ​11 Time Promised (hours):​ ​12
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): ​1
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​12
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 1.9e10 2.0e10 2.0e10 Two bunches: 9e9,2e9 1.8e10
​Requested: Not in request Not in request Not in request Two bunches: 9e9,3e9 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 37,2.2 33,17 39,6.0 61,11 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​Two bunches, 22um and 44um with 130um separation
Bunch length requested (microns):​ ​ ​​Two bunches with 110-140um separation
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
Tested the updated E200 data acquisition and data review tools successfully. Performed tomographic measurements of longitudinal phase space and used results to fine-tune the setup for two-bunch PWFA experiments. Preliminary analysis of PWFA data confirms the new setup produces larger energy gain than with previous configuration. 
 
 
Experiment: E-211 CERN BEAM BASED ALIGNMENT
Date: 3/17/2014
 
​Time beam delivered (hours): ​7.5 Time Promised (hours):​ ​4
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0.5 ​User off (hours): ​0.5
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​8.5
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10 2.0e10 0 0 2.0e10
​Requested: 2e10 2e10 0
0 2e10
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 38,2.2 37,7.2 41,7.5 81,17 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​Unmeasured Bunch length requested (microns):​ ​ ​​Not in request
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
We performed a systematic study of correction effectiveness (orbits and emittance), as function of singular value cut.  Some correlation with cut and emittance was found in Y, which we hope will provide valuable data to better understand the system performance.
 
 
Experiment: E-201 DIELECTRIC WAKEFIELD ACCELERATION
Date: 3/20/2014
 
​Time beam delivered (hours): ​4.5 Time Promised (hours):​ 6
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): ​2.5
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​7
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 1.9e10 1.9e10 2.0e10 1.9e10 1.9e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 38,2.3 42,4.1 57,4.3 72,11 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​50 Bunch length requested (microns):​ ​ "​​Full compression"
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​7
 
Summary from User:
We successfully put the e-beam on the trajectory for the experiment and verified all cameras and most diagnostics to be working.  THz energy diagnostic (pyro) appears to not be sensitive enough to resolve the beam transition radiation.  The dielectric structures should create enough energy to be resolved.
 
Experiment: E-213 RESISTIVE SAMPLES
Date: 3/21/2014
 
​Time beam delivered (hours): ​0.5 Time Promised (hours):​ 1
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​0.5
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10 2.0e10 2.1e10 2.0e10 2.1e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 37,2.4 39,3.7 46,4.7 71,13 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​40 Bunch length requested (microns):​ ​ ​​Not in request
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​Unreported
 
Summary from User:
Samples were exposed with full charge for switching of domains in magnetic samples. Various resistive structures were used to evaluate the damage due to an enhanced electric field.
 
Experiment: E-210 TROJAN HORSE PLASMA WAKEFIELD ACCELERATION
Date: 3/21/2014
 
​Time beam delivered (hours): ​0.5 Time Promised (hours):​ 2.0
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): ​3.5
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​4.0
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10 2.0e10 2.0e10 2.0e10 2.0e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 37,2.4 39,3.7 46,4.7 71,13
Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​40 Bunch length requested (microns):​ ​ ​​<200
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​100
 
Summary from User:
We tested code written for laser phase scan. Our camera did not work normally during matlab program running after 5mins.
 
 
Experiment: E-201 DIELECTRIC WAKEFIELD ACCELERATION
Date: 3/21/2014
 
​Time beam delivered (hours): ​8.5 Time Promised (hours):​ 8.0
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​8.5
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 1.8e10 1.9e10 1.9e10 1.8e10 1.9e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 37,2.4 39,3.7 46,4.7 71,13 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​40 Bunch length requested (microns):​ ​ ​​"Full compression"
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
We successfully sent the beam through a 300 inner diameter micron 1 cm tube for the first time at FACET.  The resulting coherent cherenkov radiation was measured ~600 Ghz.  Still no luck with the total energy pyro.
 
 
Experiment: E-201 DIELECTRIC WAKEFIELD ACCELERATION
Date: 3/22/2014
 
​Time beam delivered (hours): ​8 Time Promised (hours):​ 12
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 1
​User off (hours): ​1
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​10
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10 2.0e10 2.1e10 2.0e10 2.0e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 37,2.2 36,5.4 47,6.1 67,13 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​42 Bunch length requested (microns):​ ​ ​​"Full compression"
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
We successfully sent beam through a 15 cm, 400/600 dielectric structure.  Observed high signal on pyro detectors. possible that beam spectrometer showed energy loss on deflection.  Needs to be repeated and analyzed.
 
Experiment: E-206 TERAHERTZ STUDIES
Date: 3/23/2014
 
​Time beam delivered (hours): ​7.5 Time Promised (hours):​ 12
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0.5 ​User off (hours): ​1
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): 9.0
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10
2.1e10
2.1e10 2.0e10 2.1e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 39,2.5 37,4.1 42,6.6 67,15 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​39.7 Bunch length requested (microns):​ ​ ​​20
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​100
 
Summary from User:
Fully characterized THz radiation from the USTHz 1" dia. foil. Tuned the linac to deliver about 20 um RMS bunch length, and confirmed with both THz autocorrelation and TCAV measurements. Observed record high 2 mJ THz pulse energy.
 
Experiment: E-201 DIELECTRIC WAKEFIELD ACCELERATION
Date: 3/24/2014
 
​Time beam delivered (hours): ​11 Time Promised (hours):​ 12
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0
​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​11
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10
2.1e10
2.0e10
2.0e10
2.0e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 39,2.5
41,6.3
54,5.6
75,13
Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​36 Bunch length requested (microns):​ ​ ​​"Full compression"
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
Attempted to align the beam to 400/600 and 300/400 micron tubes, both 15 cm long but were unable to get any clear indication of satisfactory alignment.  Interesting signals were observed in the background of the accelerator, warranting a closer look at sources of coherent transition radiation and coherent diffraction radiation sources.
 
Experiment: E-210 TROJAN HORSE PLASMA WAKEFIELD ACCELERATION
Date: 3/27/2014
 
​Time beam delivered (hours): ​3.5 Time Promised (hours):​ 2
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0
​User off (hours): ​0.5
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​4.0
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10
2.0e10
2.0e10
1.9e10
2.0e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 40,2.4
45,3.7
50,4.7
77,11
Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​23 Bunch length requested (microns):​ ​ ​​<200
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​88
 
Summary from User:
We scanned delay stage from 529.25ns to 536.25ns at step of 700ps when crystal is 5mm and 3mm away from beam line. No EOS signal observed.
Experiment: T-504 HOLLOW CHANNEL PLASMA
Date: 3/27/2014
 
​Time beam delivered (hours): ​6 Time Promised (hours):​ 8
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0
​User off (hours): ​1
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): 7
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 1.9e10
2.0e10
2.0e10
1.9e10
2.0e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 40,2.4
45,3.7
50,4.7
77,11
Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​23 Bunch length requested (microns):​ ​ ​​"minimized"
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
Varied charge to find threshold for field ionization. Found to be 20%. Laser ring profile in rails cameras in tunnel confirmed to be very good. Laser alignment to ebeam was started, but had to be aborted due to motor failure.
 
Experiment: E-204 METALLIC STRUCTURES
Date: 3/28/2014
 
​Time beam delivered (hours): ​12 Time Promised (hours):​ 12
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0
​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​12
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10
2.0e10
2.0e10
2.0e10
2.0e10
​Requested: Not in request Not in request Not in request 1e10-2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 36,2.7
53,4.7
51,6.3
80,10
Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​66 Bunch length requested (microns):​ ​ ​​<100um
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​17
 
Summary from User:
We continue study of uncharted parameter space: physics accelerating gradient limits in robust, 100 GHz metal structures. In this experiment we are reaching peak surface fields several GV/m and output power of tens of MW at 100 GHz thanks to unique capabilities of FACET.
 
Experiment: T-504 HOLLOW CHANNEL PLASMA
Date: 3/30/2014
 
​Time beam delivered (hours): ​14 Time Promised (hours):​ 12
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): 0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): 14
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered:
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 40,4.3
45,4.4 48,6.4 75,8.6 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​20-30 Bunch length requested (microns):​ ​ ​​"minimized"
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
Investigated hollow channel by a combination of transverse and timing scans. Learned that transverse size of plasma is strongly dependent on relative timing shifts of 1 ps timescale.  This is unexpected with respect to previous work/theory, and very interesting.  Needs to be investigated further.
 
 
Experiment: T-504 HOLLOW CHANNEL PLASMA
Date: 3/31/2014
 
​Time beam delivered (hours): ​12 Time Promised (hours):​ 12
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 1.5 ​User off (hours): 0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): 13.5
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0 2.1 2.0 1.9 2.1
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 40,2.0 48,3.5 53,7.6 86,7.5 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​25 Bunch length requested (microns):​ ​ ​​"minimized"
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
Created Hollow channel in Argon! Successfully performed systematic transverse scans, timing scans, charge scans and pressure scans. Over 100 datasets (500 GB) of data taken successfully with improved DAQ. 
 
 
Experiment: E-200 PLASMA WAKEFIELD ACCELERATION
Date: 4/3/2014
 
​Time beam delivered (hours): ​8 Time Promised (hours):​ 8
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0.5 ​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​8.5
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0 2.0 2.0 Two bunches: 7e9, 7e9 2.0
​Requested: Not in request Not in request Not in request Two bunches: 9e9,3e9 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 40,2.0 42,3.9 46,4.4 88,8.8 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): Two bunches, 22um and 30um with 150um separation
Bunch length requested (microns):​ ​ ​​Two bunches with 110-140um separation
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
Attemped to perform two-bunch acceleration experiment, but did not observe clean two-bunch acceleration with laser on.  Not fully clear why; tomographic scan to shed light did not succeed due to different orbit.
 
Experiment: T-504 HOLLOW CHANNEL PLASMA
Date: 4/4/2014
 
​Time beam delivered (hours): ​1.5 Time Promised (hours):​ 2
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): 0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): 1.5
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 1.9 2.0 2.0 0.3 2.0
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: Not measured Not measured Not measured Not measured Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​40 Bunch length requested (microns):​ ​ ​​"minimized"
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
Completed vertical mapping of plasma channel, and laser timing scans.
 
Experiment: E-200 PLASMA WAKEFIELD ACCELERATION
Date: 4/4/2014
 
​Time beam delivered (hours): ​8 Time Promised (hours):​ ​8
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): ​0
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​8
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10 2.0e10 2.0e10 Two bunches: 1e10, 8e9 2.1e10
​Requested: Not in request Not in request Not in request Two bunches: 9e9,3e9 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 38,2.0 36,6.1 53,3.6 88,6.2 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): ​Two bunches: 30um and 30 um with 130-135um separation Bunch length requested (microns):​ ​ ​​Two bunches with 110-140um separation
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​12.5
 
Summary from User:
A very good data set was obtained with acceleration of a trailing bunch to ~2+ GeV above its initial energy. The wake from the drive bunch was apparently large (~5GeV/m) and was facilitated by the pre-ionization laser. When this laser was off, a large portion of the drive bunch was wasted since it could not itself ionize the Li vapor. This data set includes a scan of the energy features from -6 GeV to the maximum of ~ 3 GeV. An identical dataset was taken without the plasma or laser so we can know how the two energies (the two bunches) we injected behave in the beam transport to the spectrometer.
 
Experiment: E-224 PLASMA WAKEFIELD VISUALIZATION
Date: 4/4/2014
 
​Time beam delivered (hours): ​0 Time Promised (hours):​ ​4
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): ​5
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​5
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 1.9e10 2.0e10 2.0e10 1.2e10 2.1e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: Not measured Not measured Not measured Not measured Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): Unmeasured Bunch length requested (microns):​ ​ ​​"Shortest"
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
No data was obtained during this shift.  Alignment of the probe was not achievable.  Access to tunnel is necessary for recovery of alignment.
 
Experiment: E-224 PLASMA WAKEFIELD VISUALIZATION
Date: 4/5/2014
 
​Time beam delivered (hours): ​0 Time Promised (hours):​ ​3
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): 0 ​User off (hours): ​3
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours): ​3
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered: 2.0e10 2.0e10 2.0e10 1.9e10 2.0e10
​Requested: Not in request Not in request Not in request 2e10 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: 38,2.8 43,6.4 80,6.3 115,13 Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): Unmeasured Bunch length requested (microns):​ ​ ​​"Shortest"
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available ​0
 
Summary from User:
No data was obtained during this shift.  Alignment of the probe was not achievable.  Access to tunnel would be necessary for recovery of alignment.
 
Experiment: E-217 IONIZATION INJECTION PLASMA WAKEFIELD ACCELERATION
Date: 4/5/2014
 
​Time beam delivered (hours): Time Promised (hours):​ ​9
​ ​ ​ ​ ​ ​
​Unscheduled accelerator downtime (hours): ​User off (hours):
​ ​ ​ ​ ​ ​
​Total Time (delivered+downtime+user off, hours):
​ ​ ​ ​ ​ ​
Charge​ (electrons/bunch)
S2​ S10​ S19 S20​ SCAV​
​Delivered:
​Requested: Not in request Not in request Not in request Two bunches: 9e9,3e9 Not in request
​ ​ ​ ​ ​ ​
​Normalized emittance (mm mrad)
S2​ (x,y) S4 (x,y) S11​ (x,y) S18 (x,y)​ ​S20 (x,y)
Delivered: Not measured
​Requested: Not in request Not in request Not in request​ Not in request Not in request
​ ​ ​ ​ ​ ​
​Bunch length delivered (rms, microns): Bunch length requested (microns):​ ​ ​​
​ ​ ​ ​ ​ ​
​% time accelerator support physicist available
 
Summary from User:
 
 
 



 

SLAC SLAC National Accelerator Laboratory, Menlo Park, CA
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