Changes for page Trigger Howto

Last modified by sndueste on 2023/07/07 11:28
From version 4.1
edited by sndueste
on 2019/08/22 15:54
Change comment: There is no comment for this version
To version 5.1
edited by sndueste
on 2019/08/22 16:02
Change comment: There is no comment for this version

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1 -The MTCA based triggers have a jitter in the few ps range, the delay can be shifted in 1 ns steps (over many ms), one can choose between 10 Hz triggers, frequencies locked to the pulses (e.g. 1MHz) and the actual bunch patterns. A detailled description can be found in [[x2Timer manual>>attach:FLASH.TriggerHowTo@x2Timer.pdf]]. And here is the [[little talk>>attach:FLASH.TriggerHowTo@mtca_trigger.pdf]] that was given in the group meeting Oct 2014
1 +The MTCA based triggers have a jitter in the few ps range, the delay can be shifted in 1 ns steps (over many ms), one can choose between 10 Hz triggers, frequencies locked to the pulses (e.g. 1MHz) and the actual bunch patterns. A detailed description can be found in [[x2Timer manual>>attach:x2Timer.pdf]].
2 2  
3 -in short: the triggers are for low impedance (~~50 OHM terminated ?? ), 5V triggers with an adjustable width. The main controlpannel for the x2 timer has the control options for the 3 front modules (connected with a RJ45 cable - connecting to a "trigger box" with 2 trigger exits (Lemo) each) and 8 Lemo exits at the back of the crate. in the BL-beamline case these triggers are connected to the BNC (patch pannel) ports at the rack.
3 +in short: the triggers are for low impedance (~~50 OHM terminated ?? ), 5V triggers with an adjustable width. The main control panel for the x2 timer has the control options for the 3 front modules (connected with a RJ45 cable - connecting to a "trigger box" with 2 trigger exits (Lemo) each) and 8 Lemo exits at the back of the crate. in the BL-beamline case these triggers are connected to the BNC (patch panel) ports at the rack.
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5 -The main control can be done with a simplified user panel which can handel the timing in respect to the FEL pulses and not in respect to some (arbitrary) reference time ( Event)[[~[~[image:url:http://hasfweb.desy.de/pub/Setup/TriggerHowto/Trigger_scheme.gif~|~|alt="Trigger_scheme.gif" width="800"~]~]>>attach:Trigger_scheme.gif]]
5 +The main control can be done with a simplified user panel which can handle the timing in respect to the FEL pulses and not in respect to some (arbitrary) reference time ( Event)[[~[~[image:url:http://hasfweb.desy.de/pub/Setup/TriggerHowto/Trigger_scheme.gif~|~|alt="Trigger_scheme.gif" width="800"~]~]>>attach:Trigger_scheme.gif]]
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7 7  
8 8  \\
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81 81  shifts with thestart time of FLASH2 as event 22 but comes 22 ms ! before the FEL
82 82  )))
83 83  
84 -from this trigger as starting point one can shift the timing in 9 ns steps forst and finally in 0.9 ns steps for fine adjustment.
84 +from this trigger as starting point one can shift the timing in 9 ns steps first and finally in 0.9 ns steps for fine adjustment.
85 85  
86 86  
87 87  [[~[~[image:url:http://hasfweb.desy.de/pub/Setup/TriggerHowto/mtcatrigger1.png~|~|alt="mtcatrigger1.png" width="811" height="532"~]~]>>attach:mtcatrigger1.png]]