ATF's Nd:YAG Laser Preformance Statistics
The energies reported in the laser room are a mean of the daily readings taken when the system is
prepared for an experimental run, typically this is done first thing in the morning.  Energies are
is done first thing in the morning.  Energies are also recorded when the configuration of the system
is changed in the middle of a run at the operator's request. Each time data is recorded, the mean and
rms of 50 shots is used.
The cathode energy and rms jitter is also recorded daily for each run, but the sample size is 500 shots.
The phase stability is estimated from the phasemeter data logged throughout the weekly running period,
excluding sudden jumps in phase.  It represents the  typical FWHM range in phase that would
be encountered over a period of 10-15 minutes, measured over the bandwidth 0-10 Hz.
Position jitter is measured near the gun in UV at the cathode conjugate image plane.
The beam centroid is calculated, and the RMS over 50 shots is expressed as
a percentage of the beam diameter, which is typically 2-3 mm.
The flatness is measured from the CCD image of the UV on the cathode monument.
Horizontal and vertical slices are taken through the center of the spot. Mean intensity and rms variation about the mean
are calculated for the portion of each slice above 50% of peak intensity, and the rms is reported as a percentage of peak
intensity. Measured this way a perfect flattop would have an rms of 0, while an ideal gaussian would have an rms of 19%.
  Preamp. Amplifier Green UV Cathode Phase Position Flatness
Date Amp.
mmJ, mean		 Jitter
rms
%		 Amp.
mJ,
mean		 Jitter
rms
%		 Amp.
mJ,
mean		 Jitter
rms
%		 Amp.
mmJ
mean		 Jitter
rms
%		 Amp.
mmJ
mean		 Jitter
rms
%		 Drift,
ps		 Horiz.
jitter
%		 Vert.
jitter
%		 Horiz.

%		 Vert.

%
2/18/2000 346.5 1.3 28.65 0.8 1.622 1.4 211.6 2.9 33.7 1.9 0.75  
2/25/2000 315.3 1.4 27.12 1.2 1.603 1.4 208.3 2.7 30.1 2.1 0.67  
3/24/2000 360.8 1.4 27.4 0.8 1.8 0.8   33.0 1.5 0.3    
3/31/2000 370.8 1.6 27.5 0.9 1.6 1.4   20.9 2.1 0.2    
4/14/2000 366.8 1.6 27.2 0.9 1.6 1.4   29.2 1.9 0.1 0.9 0.2  
4/21/2000 329.0 1.7 24.6 0.8 1.6 1.2 203.7 2.1 25.9 1.7 <0.1 0.9 0.1  
5/5/2000 362.0 1.4 24.8 0.8 1.6 1.0 205.1 2.1 35.6 1.8 0.1 0.9 0.1  
5/19/2000 381.0 1.6 26.5 0.7 1.7 1.6 192.8 2.4    
5/26/2000 365.0 1.6 24.5 0.9 1.1 1.5 210.4 2.0 24.4 2.4 0.4 0.5 0.2  
6/2/2000 360.0 1.9 24.3 1.0 1.3 1.7 203.8 2.4 27.2 2.1 0.3 0.9 0.3  
6/9/2000 379.4 1.9 24.8 0.9 1.7 1.4 204.4 2.8 14.6 3.2 0.2 0.7 0.3  
6/16/2000 310.0 1.1 24.9 0.8 1.6 1.1 194.7 2.1 24.5 2.2 0.2 0.7 0.2  
6/23/2000 230.7 1.2 22.4 0.8 1.8 1.5 238.4 2.2 22.3 2.4 0.1 0.8 0.2  
6/30/2000 255.5 1.5 26.8 0.9 1.7 1.5 195.5 3.0 13.3 3.2 0.2 0.8 0.2  
7/7/2000 193.6 1.5 28.8 1.0 1.8 1.7 210.8 3.2 23.0 3.3 0.3 0.8 0.2  
7/14/2000 187.4 1.1 31.1 1.1 1.7 1.9 200.8 3.0 24.3 2.6 0.2 0.7 0.2  
7/21/2000 152 0.9 31.55 1.19 1.667 1.89 211.8 2.64 24.03 2.275 0.1667 0.4 0.15  
7/28/2000 153.08 0.946 32.05 0.938 1.714 1.75 233.1 2.44 15.68 2.2 0.15 0.633 0.233  
8/4/2000 152.52 0.982 31.68 1.258 1.674 1.17 223 2.96 23.74 2.3 0.16 0.625 0.25 12 17
8/11/2000 148.83 0.739 31.1 1.29 1.644 1.66 217.4 3.08 23.3 2.167 0.2 0.6 0.2667 12 17
8/25/2000 149.9 1.067 30.9 0.971 1.656 1.51 212.7 2.26 12.8 2.6 0.2 0.6 0.25 13 16
11/17/2000 159.45 1.258 29.26 1.31 1.092 2.32 213.5 2.8 28.35 2.45 0.15 0.2 0.1 10 9
12/1/2000 197.75 1.275 30.2 1.438 1.249 2.72 214 2.76 30.7 1.7 0.2 0.4 0.1 9 9
12/8/2000 174.2 1.127 31.04 1.564 1.193 3.4 238.4 3.09 16.37 1.8 0.15 0.2 0.15 8 8
   
   
   

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