Info collection for the BAM

* the relevant data is the Arrivaltime FLASH.SDIAG/BAM/4DBC3/LOW_CHARGE_ARRIVAL_TIME

* besides the arivaltime from FLASH1 there is also the FLASH2/3 electron arrival time saved. The BAM data is saved for the complete RF pulse. First bunches are from FLASH1 then there is a gap for switching and then there is a second part for FLASH2 (starting at the FLASH2 start time (recorded in DAQ as {{code language="none"}}/FL2/Timing/start time flash2{{/code}}))

3

4

\\

5

6

* There are now (since March 2017) LOW and HIGH charge channels. for now the LOW_CHARGE Channel is the relavant one.

7

* bigger numbers indicate later arrivaltime of the electrons

8

* the arrivaltime sould be within -20 ps and +20 ps . otherwise there might be a problem ...

9

* There is a BAM status parameter: FLASH.SDIAG/BAM/4DBC3/BAM_STATUS.1 (the 1 indicates FLASH1)

10

** bit 0 (value: 1) = data is valid,

11

** bit 1 (value: 2) = at least 1 bunch is present,

12

** bit 2 (value: 4) = calibration is on,

13

** bit 3 (value: 8) = internal feedback is on,

14

** bit 4 (value: 16) = tuning mode is on

\\

* if DBC3 is not working then also 3DBC2 can be used. there is a linear correlation between BC2 and BC3

\\

=== more Info: ===

\\

* [[LINK to detailed infos from MSK (may only work inside DESY network)(% class="confluence-embedded-file-wrapper confluence-embedded-manual-size" %)~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:http://www.desy.de/~~mbock/pages/BAM_daq_channel_descriptions.html||rel="nofollow" shape="rect" class="external-link"]]

27

* [[talk by Marie (2011)>>attach:FLASH-seminar-2011_BAM_study_results.pdf]]

28

* contact: Marie Kristin Czwalinna

\\

== Streak camera info ==

33

34