Wiki source code of Info collection for the BAM

Version 1.1 by sendels on 2019/08/09 12:46
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1 * [[LINK to detailled infos from MSK~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:http://mskwiki/index.php?title=BAM-DAQ_Channels||shape="rect"]]
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5 * the relevant data is the Arrivaltime FLASH.SDIAG/BAM/4DBC3/LOW_CHARGE_ARRIVAL_TIME
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9 * There are now (since March 2017) LOW and HIGH charge channels. for now the LOW_CHARGE Channel is the relavant one.
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13 * bigger numbers indicate later arrivaltime of the electrons
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17 * the arrivaltime sould be within -20 ps and +20 ps . otherwise there might be a problem ...
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21 * There is a BAM status parameter: FLASH.SDIAG/BAM/4DBC3/BAM_STATUS.1 (the 1 indicates FLASH1)
22 ** bit 0 (value: 1) = data is valid,
23 ** bit 1 (value: 2) = at least 1 bunch is present,
24 ** bit 2 (value: 4) = calibration is on,
25 ** bit 3 (value: 8) = internal feedback is on,
26 ** bit 4 (value: 16) = tuning mode is on
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30 * if DBC3 is not working then also 3DBC2 can be used. there is a linear correlation between BC2 and BC3
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32 (from Marie: der groesste Drift-Beitrag kommt immer aus dem Injektor (also alles zw. Injektorlaser und ACC39) Einfluss von ACC23 ist deutlich kleiner. Im Mittel hat man einen linearen Zusammenhang zw. Ankunftszeit BC2 zu BC3.)
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38 === more Info: ===
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42 * [[talk by Marie (2011)>>attach:FLASH-seminar-2011_BAM_study_results.pdf]]
43 * contact: Marie Kristin Czwalinna
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47 == Streak camera info ==
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51 * the streak camera measures the delay between optical (amplified) laser and FEL (dipole radiation). - not in respect to the master clock !
52 * streak camera ONLY delivers data which is averaged over seveal 10 seconds. there is NO shot to shot info.
53 * a larger value of the streak camera delay indicates that the optical laser comes later than the FEL (or FEL earlier than the laser ...)