Trigger PROM versions

Below is a description of the changes to the trigger PROMs labeled by date. Changes are split into 2 types

• May affect LBL electronics data quality
• Should not affect LBL electronics data quality

2002_02_05 (from run51)

2002_02_07 (from run56)

• Added OD to ID trigger, trigger type 004:000:000
• Added trigger type 008:000:000 for ID to OD triggers
• Fixed bug with supernova trigger, previously supernova trigger recorded many times
• Allowed prescaled threshold to be modified independently of singles threshold

2002_02_13 (from run 70 ?)

• Modified pin assignments

2002_02_15 (from run 77)

• Modified trigger disables to prevent latch from overflowing. Prior to this there were broken trigger records when the latch overflowed and possible missing trigger records

2002_02_19 (from run 96)

• Fixed bug with multiple supernova mode trigger records
• Fixed phase of trigger commands, nsums and hence trigger rates from previous 3 days are unreliable

2002_02_25 (from run 124)

• Includes MACRO triggers

2002_07_01 (from run 876)

• Added 1ms veto to counter for supernova events following nsum 1300 ID event
• Supernova trigger to 8 events above nsum 772 in 0.8388608s
• Supernova mode changed to ID history (threshold 100), ID singles (threshold 200), OD history and OD singles (threshold 6, 5, 6, 7 in top, upper, lower, bottom sections), 1pps trigger, 5 inch trigger
• Supernova mode enabled for 2 minutes
• Fixed bug with trigger enable and disable (see http://bert.awa.tohoku.ac.jp:8081/KamLAND/020416.0)

2002_07_06 (from run 936)

• Changed 1ms veto to counter for supernova events following nsum 1250 ID event, instead of nsum 1300 ID events
• Supernova mode enabled for 1 minute
• Added calibration output for use with Japanese laser to allow correction with 25ns jitter

2002_08_03 (from run 1167)

• Fix to MACRO triggers

2002_09_02 (from run 1313)

• Fix so that ID->OD and OD->ID triggers are actually sent.
• The trigger can now issue a forced acquisition no priority trigger with GPS triggers.
• Changed prompt and delayed so you could disable the sending of the prompt trigger to the FBEs. This may allow a study of low energy physics.
• Changed the MACRO double trigger to prompt 200<=nsum<=1050, delay 340<=nsum<=540, 0.3us<=coincidence<=500us.
• Subtle change to MACRO muon trigger

2004_02_15 (from run 3381) VERSIONS: board1 = 2, board2 = 2, board3 = 12

• The trigger PROM versions are now recorded.
• There are 4 new trigger types. They use the trigger output bits previously used for the calibration number.
• The run conditions and timestamps are recorded when the run conditions change.
• All of FBE triggers are disabled for 200 ns after another FBE trigger. (Previously, GPS forced acquisition didn't follow this rule.)
• 1 pps global trigger is added.
• MACRO single's trigger nsum threshold is separated from the FBE single's threshold.
• MACRO LASER/LED calibration trigger is added.
• The trigger timing for calibration global trigger is delayed from 175 ns to 375 ns.
• MACRO to ID trigger is added.
• LASER/LED calibration supernova mode can be now enabled.
• The supernova event counter counts another supernova event only if the nsum goes below 120 beforehand.
• The supernova event counter is disabled for 1 ms after all muons (nsum >=1250).
• The supernova event threshold is raised from nsum 772 to nsum 1100.
• The supernova mode run condition is changed (5inch threshold 0 -> 7, OD/ID to ID/OD enabled).
• The MACRO triggers are recorded twice, 1 clock tick apart, in the trigger kdf. (bug)
• The FBE FA at the 2nd clock ticks is recorded. (bug)