Page History
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rate, Hz | factor | factors
928571 1 1
464285 2 (2,)
232142 4 (2, 2)
185714 5 (5,)
132653 7 (7,)
116071 8 (2, 2, 2)
92857 10 (2, 5)
71428 13 (13,)
66326 14 (2, 7)
58035 16 (2, 2, 2, 2)
46428 20 (2, 2, 5)
37142 25 (5, 5)
35714 26 (2, 13)
33163 28 (2, 2, 7)
26530 35 (5, 7)
23214 40 (2, 2, 2, 5)
18571 50 (2, 5, 5)
17857 52 (2, 2, 13)
16581 56 (2, 2, 2, 7)
14285 65 (5, 13)
13265 70 (2, 5, 7)
11607 80 (2, 2, 2, 2, 5)
10204 91 (7, 13)
9285 100 (2, 2, 5, 5)
8928 104 (2, 2, 2, 13)
8290 112 (2, 2, 2, 2, 7)
7428 125 (5, 5, 5)
7142 130 (2, 5, 13)
6632 140 (2, 2, 5, 7)
5306 175 (5, 5, 7)
5102 182 (2, 7, 13)
4642 200 (2, 2, 2, 5, 5)
4464 208 (2, 2, 2, 2, 13)
3714 250 (2, 5, 5, 5)
3571 260 (2, 2, 5, 13)
3316 280 (2, 2, 2, 5, 7)
2857 325 (5, 5, 13)
2653 350 (2, 5, 5, 7)
2551 364 (2, 2, 7, 13)
2321 400 (2, 2, 2, 2, 5, 5)
2040 455 (5, 7, 13)
1857 500 (2, 2, 5, 5, 5)
1785 520 (2, 2, 2, 5, 13)
1658 560 (2, 2, 2, 2, 5, 7)
1485 625 (5, 5, 5, 5)
1428 650 (2, 5, 5, 13)
1326 700 (2, 2, 5, 5, 7)
1275 728 (2, 2, 2, 7, 13)
1061 875 (5, 5, 5, 7)
1020 910 (2, 5, 7, 13)
928 1000 (2, 2, 2, 5, 5, 5)
892 1040 (2, 2, 2, 2, 5, 13)
742 1250 (2, 5, 5, 5, 5)
714 1300 (2, 2, 5, 5, 13)
663 1400 (2, 2, 2, 5, 5, 7)
637 1456 (2, 2, 2, 2, 7, 13)
571 1625 (5, 5, 5, 13)
530 1750 (2, 5, 5, 5, 7)
510 1820 (2, 2, 5, 7, 13)
464 2000 (2, 2, 2, 2, 5, 5, 5)
408 2275 (5, 5, 7, 13)
371 2500 (2, 2, 5, 5, 5, 5)
357 2600 (2, 2, 2, 5, 5, 13)
331 2800 (2, 2, 2, 2, 5, 5, 7)
285 3250 (2, 5, 5, 5, 13)
265 3500 (2, 2, 5, 5, 5, 7)
255 3640 (2, 2, 2, 5, 7, 13)
212 4375 (5, 5, 5, 5, 7)
204 4550 (2, 5, 5, 7, 13)
185 5000 (2, 2, 2, 5, 5, 5, 5)
178 5200 (2, 2, 2, 2, 5, 5, 13)
142 6500 (2, 2, 5, 5, 5, 13)
132 7000 (2, 2, 2, 5, 5, 5, 7)
127 7280 (2, 2, 2, 2, 5, 7, 13)
114 8125 (5, 5, 5, 5, 13)
106 8750 (2, 5, 5, 5, 5, 7)
102 9100 (2, 2, 5, 5, 7, 13)
92 10000 (2, 2, 2, 2, 5, 5, 5, 5)
81 11375 (5, 5, 5, 7, 13)
71 13000 (2, 2, 2, 5, 5, 5, 13)
66 14000 (2, 2, 2, 2, 5, 5, 5, 7)
57 16250 (2, 5, 5, 5, 5, 13)
53 17500 (2, 2, 5, 5, 5, 5, 7)
51 18200 (2, 2, 2, 5, 5, 7, 13)
40 22750 (2, 5, 5, 5, 7, 13)
35 26000 (2, 2, 2, 2, 5, 5, 5, 13)
28 32500 (2, 2, 5, 5, 5, 5, 13)
26 35000 (2, 2, 2, 5, 5, 5, 5, 7)
25 36400 (2, 2, 2, 2, 5, 5, 7, 13)
20 45500 (2, 2, 5, 5, 5, 7, 13)
16 56875 (5, 5, 5, 5, 7, 13)
14 65000 (2, 2, 2, 5, 5, 5, 5, 13)
13 70000 (2, 2, 2, 2, 5, 5, 5, 5, 7)
10 91000 (2, 2, 2, 5, 5, 5, 7, 13)
8 113750 (2, 5, 5, 5, 5, 7, 13)
7 130000 (2, 2, 2, 2, 5, 5, 5, 5, 13)
5 182000 (2, 2, 2, 2, 5, 5, 5, 7, 13)
4 227500 (2, 2, 5, 5, 5, 5, 7, 13)
2 455000 (2, 2, 2, 5, 5, 5, 5, 7, 13)
1 910000 (2, 2, 2, 2, 5, 5, 5, 5, 7, 13)
Event Codes
Some eventcodes defined by ACR are described on Carolina's page (see column labelled "new trigger bit"): Control Sequence Bit. Note that our "eventcode" is their (sequenceEngine#<<16 | sequencerBit#).
Triggering Devices With Beam
To trigger on "every shot" with beam (the equivalent of LCLS1's eventcode 140) use "Mode=FixedRate:1MHz, Destination=Include:DumpSXR" (without the "destination" field I believe you will just get a pure 1MHz trigger). See table below where DumpSXR destination corresponds to destination bit 4. It is also important to set the "select" field to "Inclusive" (see below for daq configuration object GUI).
Another important method (used especially for low rate 1,10,100Hz triggers that are in-synch with the beam) is to use an event-code generated by ACR (see Control Sequence Bit for currently support event codes). These event codes already include a destination setting. A technical detail: note that our "eventcode" is their (sequenceEngine#<<16 | sequencerBit#).
Some details:
- there are 288 bits of "event codes" available288 bits of "event codes":
- some have well-defined meanings, like the low-rate ones described above (in progress)
- 16 highest bits are hutch specific for sequences (272-287)
- DAQ readout groups are "extra bits" included at end of timing frame
- timing frames have "destinations": e.g. bykiks, and bykikh both go to "bsy" dump
- unlike LCLS1 we will not be using event-codes to understand when bykiks has fired: use destinations instead (in particular DumpBSY, as described below)
To trigger on "every shot" with beam (the equivalent of LCLS1's eventcode 140) use "Mode=FixedRate:1MHz, Destination=Include:DumpSXR" (without the "destination" field I believe you will just get a pure 1MHz trigger). See table below where DumpSXR destination corresponds to destination bit 4. Another method is to use an event-code generated by ACR (see Control Sequence Bit for current examples). It is also important to set the "select" field to "Inclusive".
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- 272-287)
- DAQ readout groups are "extra bits" included at end of timing frame
- timing frames have "destinations": e.g. bykiks, and bykikh both go to "bsy" dump
- unlike LCLS1 we will not be using event-codes to understand when bykiks has fired: use destinations instead, in particular DumpBSY for "dropped" or "background" shots
Trigger Types
Timing receivers share a common logic module for generating triggers. They consist of the logical AND of two components, a rate component and a beam destination component.
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