## Period and Epoch Naming » History » Version 71

Version 70 (Jeff Hartnell, 08/21/2017 06:20 AM) → Version 71/141 (Jeff Hartnell, 08/21/2017 06:22 AM)

h1. 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).

h2. 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.

h2. 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.

h2. Table of Past and Current Periods and Epochs

| *Period* | *Epoch* | *FD Run #* | *ND Run #* | *Analysis / Comments* |
|\5={background:lightgray}. _Commissioning_ |
|/2. Period 1 |/2. Epoch 1a | 12942[1] | 10377 |/11. First Analysis (ND is 1+2a only, FD is 1+2a+2b). For period 1, we used coarse timing for the FD. In all other periods, and for all ND data, we used fine timing. First 14kt FD run was 15336 (in the middle of period 1) but much of the data after that has one or more diblocks missing. Most (but not all) of the data from period 2 onward is 14kt.|
| 17139 | 10407 |
|\4={background:lightgray}. _2014 Shutdown and Refit_ |
|/14. Period 2 |/2. Epoch 2a| 17891 | 10496 |
| 19096 | 10824 |
|\3={background:lightgray}. _Fri, 13 Mar 2015 23:59:59_ |
|/2. Epoch 2b | 19097 | 10825 |
| 19586 | 10932 |
|\4={background:lightgray}. _Fri, 15 May 2015 23:59:59_ |
|/2. Epoch 2c | 19587 | 10933 |
| 19746 | 10973 |
|\4={background:lightgray}. _Mon, 8 Jun 2015 9:40:00_ |
|/2. Epoch 2d | 19747 | 10974 |/2. NuMI Horn scan & NO Horn Current beam |
| 19958 | 11018 |
|\4={background:lightgray}. _Sat 4 Jul 2015, 00:01:00_ |
|/2. Epoch 2e | 19959 | 11019 |/2. 2015 Summer beam shutdown & start-up |
| 20752 | 11228 |
|\5={background:lightgray}. _GAIN 140 -- Mon 12 Oct 2015 13:32:38_ |
|/14. Period 3 |/2. Epoch 3a | 20753 | 11229 |/2. NO beam or horn & target scans |
| 20922 | 11249 |
|\4={background:lightgray}. _Fri, 23 Oct 2015, 11:36:00_ |
|/2. Epoch 3b | 20923 | 11250 |/2. 2015 BEAM |
| 21230 | 11301 |
|\4={background:lightgray}. _Wed, 18 Nov 2015_ |
|/2. Epoch 3c | 21231 | 11302 |/2. 2015/2016 BEAM, Second Analysis cutoff for ND |
| 22019 | 11383 |
|\4={background:lightgray}. _Wed, 20 Jan 2016_ |
|/2. Epoch 3d | 22020 | 11384 |/2. 2016 BEAM, Second Analysis cutoff for FD |
| 22900 | 11537 |
|\4={background:lightgray}. _Mon, 2 May 2016 @ 7:55_ |
|/2. Epoch 3e | 22901 | 11538 |/2. End of 2016 NuMI neutrino beam|
| 23419 | 11628 |
|\5={background:lightgray}. _RHC (Anti-Neutrino) mode -- Wed 29 Jun 2016 19:45_ |
|/8. Period 4 |/2. Epoch 4a | 23420 | 11632 |/2. Short 2016 antineutrino beam |
| 23670 | 11667 |
|\4={background:lightgray}. _2016 shutdown -- Fri, 29 July 2016 @ 12:35_ |
|/2. Epoch 4b | 23671 | 11668 |/2. 2016 summer shutdown. DAQ updated to R10 release with new data format. |
| 24587 | 11920 |
|\4={background:lightgray}. _Beam returns in RHC (anti-neutrino) mode from shutdown -- Fri, 11 Nov 2016_|
|/2. Epoch 4c | 24588 | 11921 |/2. antineutrino beam after shutdown. Note R10 DAQ release used with new data format, horn re-aligned |
| 24613 | 11925 |
|\5={background:lightgray}. _FHC (Neutrino) mode -- Mon 14 Nov 2016_ |
|/5. Period 5 |/2. Epoch 5a | 24614 | 11926 |/5. 2016/2017 BEAM (the end of Epoch 5a was the cutoff for "miniproduction" validation files) miniproduction) |
| 25035 | 12028 |
|\3={background:lightgray}. _Tues 10 Jan 2017_ |
|/2. Epoch 5b | 25036 | 12029 |
| 25412 | 12086 |
|\5={background:lightgray}. _RHC (Anti-Neutrino) mode -- Mon 20 Feb 2017_ |
|/3. Period 6 |/2. Epoch 6a | 25413 | 12087 |/2. 2017 antineutrino beam |
| 26685 | 12289 |
|\4={background:lightgray}. _2017 shutdown -- Fri, 7 July 2017 @ 12:01_ |

fn1. First full-gain un-mangled run was 11496.

&nbsp;

h2. Contrived Example: Future Periods and Epochs

| *Period* | *Epoch* | *Analysis* |
| Period 2 | Epoch 2c |/5. Second Analysis |
|\2={background:lightgray}. _2015 Shutdown_ |
| Period 3 | Epoch 3a |
|\2={background:lightgray}. _Begin RHC_ |
|/3. Period 4 | Epoch 4a |
|\2={background:lightgray}. _Second Analysis Cutoff_ |
| Epoch 4b |

h2. Reference

As a cross check to Watchdogs milestones, you can take a look at the link below:
https://cdcvs.fnal.gov/redmine/projects/novawatchdog/wiki/Stable_partition_milestones