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Jeff Hartnell, 05/25/2016 04:27 AM


Period and Epoch Naming

Snapshots of this page are kept in DocDB-15461, which should be updated at suitable intervals (e.g. second, third, etc analyses).

Periods

Periods are intervals of time characterized by uniform running conditions. A new period is started for a major change to running conditions: a horn current change, a long shutdown, target replacement, etc.

Periods are denoted with numbers. Intervals not expected to be used for analysis should not be numbered. In other words, consecutive periods need not be contiguous.

Epochs

Periods are divided into epochs; a new epoch is started whenever analysis or production reasons dictate. Epochs are denoted with a lowercase letter following the number of the parent period. When a point in time divides epochs, the run spanning the division is part of the later epoch.

Table of Past and Current Periods and Epochs

Period Epoch FD Run # ND Run # Analysis / Comments
Commissioning
Period 1 Epoch 1a 129421 10377 First Analysis (ND is 1+2a only, FD is 1+2a+2b)
17139 10407
2014 Shutdown and Refit
Period 2 Epoch 2a 17891 10496
19096 10824
Fri, 13 Mar 2015 23:59:59
Epoch 2b 19097 10825
19586 10932
Fri, 15 May 2015 23:59:59
Epoch 2c 19587 10933
19746 10973
Mon, 8 Jun 2015 9:40:00
Epoch 2d 19747 10974 NuMI Horn scan & NO Horn Current beam
19958 11018
Sat 4 Jul 2015, 00:01:00
Epoch 2e 19959 11019 2015 Summer beam shutdown & start-up
20752 11228
GAIN 150 -- Mon 12 Oct 2015 13:32:38
Period 3 Epoch 3a 20753 11229 NO beam or horn & target scans
20922 11249
Fri, 23 Oct 2015, 11:36:00
Epoch 3b 20923 11250 2015 BEAM
21230 11301
Wed, 18 Nov 2015
Epoch 3c 21231 11302 2015/2016 BEAM
22019 11383
Wed, 20 Jan 2016
Epoch 3d 22020 11384 2016 BEAM, Second Analysis cutoff (3d is only used for FD)
22900 11537
Mon, 2 May 2016 @ 7:55
Epoch 3e 22901 11538 End of 2016 NuMI neutrino beam
?? ??

1 First full-gain un-mangled run was 11496.

 

Contrived Example: Future Periods and Epochs

Period Epoch Analysis
Period 2 Epoch 2c Second Analysis
2015 Shutdown
Period 3 Epoch 3a
Begin RHC
Period 4 Epoch 4a
Second Analysis Cutoff
Epoch 4b