Last modified by sndueste on 2025/02/06 10:58
From version 4.1
edited by cpassow
on 2020/04/23 17:41
Change comment: There is no comment for this version
To version 3.1
edited by sndueste
on 2020/04/08 15:01
Change comment: There is no comment for this version

Summary

Details

Page properties
Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.cpassow
1 +XWiki.sndueste
Content
... ... @@ -36,17 +36,3 @@
36 36  * the streak camera measures the delay between optical (amplified) laser and FEL (dipole radiation). - not in respect to the master clock !
37 37  * streak camera ONLY delivers data which is averaged over several 10 seconds. there is NO shot to shot info.
38 38  * a larger value of the streak camera delay indicates that the optical laser comes later than the FEL (or FEL earlier than the laser ...)
39 -
40 -\\
41 -
42 -== Calculate pump-probe delay ==
43 -
44 -* BAM measurement: difference between electrons and timing system
45 -** the BAM signal has to be added, but it seems that the sign is the different for FLASH2
46 -** it is the best to test addition/subtraction and check the results on a step function (more/less sharp)
47 -
48 -* Streak camera: difference between electrons and optical laser
49 -** it is a slow signal and should only be used as a rolling average over multiple minutes
50 -** if you see a drift in the streak camera which you do not see in the BAM it is resulting from the optical laser
51 -** if this (BAM - streak camera signal) is significant e.g. 200 fs over 1 h, it means the drift compensation was probably off and it should be compensated
52 -** addition/subtraction is dependent on the setup and have to be checked