Period and Epoch Naming » History » Version 45
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 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.
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|
|Period 1||Epoch 1a||129421||10377||First Analysis (ND is 1+2a only, FD is 1+2a+2b)|
|2014 Shutdown and Refit|
|Period 2||Epoch 2a||17891||10496|
|Fri, 13 Mar 2015 23:59:59|
|Fri, 15 May 2015 23:59:59|
|Mon, 8 Jun 2015 9:40:00|
|Epoch 2d||19747||10974||NuMI Horn scan & NO Horn Current beam|
|Sat 4 Jul 2015, 00:01:00|
|Epoch 2e||19959||11019||2015 Summer beam shutdown & start-up|
|GAIN 150 -- Mon 12 Oct 2015 13:32:38|
|Period 3||Epoch 3a||20753||11229||NO beam or horn & target scans|
|Fri, 23 Oct 2015, 11:36:00|
|Epoch 3b||20923||11250||2015 BEAM|
|Wed, 18 Nov 2015|
|Epoch 3c||21231||11302||2015/2016 BEAM|
|Wed, 20 Jan 2016|
|Epoch 3d||22020||11384||2016 BEAM, Second Analysis cutoff (3d is only used for FD)|
|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 2||Epoch 2c||Second Analysis|
|Period 3||Epoch 3a|
|Period 4||Epoch 4a|
|Second Analysis Cutoff|