2024, Feb 19

Beam parameters:

71 um x 103 um x 61 um

Energy feedback DL10 OFF

Initial betas: 50 cm

List of Datasets

URL	Comments	Responsible for analysis
/nas/nas-li20-pm00/E320/2024/20240218/E320_05516
/nas/nas-li20-pm00/E320/2024/20240218/E320_05517
/nas/nas-li20-pm00/E320/2024/20240218/E320_05518		Alex, analysis done. Results here
/nas/nas-li20-pm00/E320/2024/20240218/E320_05519
/nas/nas-li20-pm00/E320/2024/20240218/E320_05520
/nas/nas-li20-pm00/E320/2024/20240218/E320_05521	Forgot Probeline1 before
/nas/nas-li20-pm00/E320/2024/20240218/E320_05522
/nas/nas-li20-pm00/E320/2024/20240218/E320_05523
/nas/nas-li20-pm00/E320/2024/20240218/E320_05524
/nas/nas-li20-pm00/E320/2024/20240218/E320_05525
/nas/nas-li20-pm00/E320/2024/20240219/E320_05527	Laser ON. Waist at FILS
/nas/nas-li20-pm00/E320/2024/20240219/E320_05528	Repetition Laser ON Waist at FILS Nevertheless no matches Might be a CMOS issue
/nas/nas-li20-pm00/E320/2024/20240219/E320_05529	Laser OFF Waist at FILS All LBG_LFOV Data looks like this, because the camera somehow interpreted the ROI of the profilemonitor wrong
/nas/nas-li20-pm00/E320/2024/20240219/E320_05530	Calibration with main beam and ND2 Inserted Waist at FILS
/nas/nas-li20-pm00/E320/2024/20240219/E320_05532	Laser ON with waist at PIC_CENT
/nas/nas-li20-pm00/E320/2024/20240219/E320_05533	Laser ON with waist at PIC_CENT
/nas/nas-li20-pm00/E320/2024/20240219/E320_05535	Timing scan beta = 50 cm waist at pic_cent
/nas/nas-li20-pm00/E320/2024/20240219/E320_05538	Timing scan beta = 25 cm waist at pic_cent
/nas/nas-li20-pm00/E320/2024/20240219/E320_05539	Timing scan beta = 10 cm waist at pic_cent
/nas/nas-li20-pm00/E320/2024/20240219/E320_05540	Timing scan beta = 5 cm waist at pic_cent

Post-beam characterization:

Bunch length (rms): 200 um

longitudinal data is a bit misleading, bunch length was measured at 3 PM (see http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2024/08/19.02&pos=2024-02-20T23:50:00)

beta = 50cm:

Sigma X	38.1	37.7	34.0	39.1	37.2	37.0	37.1	33.3	34.2	37.8
Sigma Y	87.9	86.2	84.8	77.3	97.0	92.6	85.8	81.5	90.6	84.8


beta = 25cm:

Sigma X	31.7	29.7	32.6	28.6	32.3	35.3	32.0	28.3	31.5	33.4
Sigma Y	71.5	81.2	79.1	79.4	75.1	74.4	79.6	72.8	77.5	84.9


beta = 15cm:

Sigma X	21.2	27.0	23.6	23.8	25.9	24.4	22.6	22.7	20.5	24.7
Sigma Y	56.7	62.2	70.4	58.4	52.0	61.5	57.9	66.9	75.8	66.6


beta = 5cm:

Sigma X	26.0	28.6	26.3	28.5	28.4	29.3	27.6	26.0	23.8	28.6
Sigma Y	59.2	37.3	52.7	58.2	78.3	53.5	36.4	75.0	53.9	62.6

Focal scan

We have a very non-ideal laser focus (see elog)

peak intensity during the z-scan looked okish
outside the focal plane the spot becomes messy

after optimizing with the beam shaper