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2017-03-24 straight tracks scattering requirements¶
240 MeV/c LiH dataset (March 2016)¶
Nb run 7851 has no cdb entry for end of run data, so is not included in this calculation.
| runs | Note 497 | 7727, 7733, 7737, 7738, 7741, 7775, 7776, 7790, 7794, 7795, 7796, 7805, 7808, 7809, 7813, 7814, 7816, 7817, 7818, 7819, 7844, 7845, 7847, 7848, 7849, |
| tof1 triggers | Note 497 | 1239827 |
| tof2 triggers | Note 497 | 232982 |
| tof1_triggers | CDB | 1997731 |
| tof2_triggers | CDB | 807646 |
| lmc1234 | CDB | 35417472 |
| time | CDB | 45 hrs 57 mins |
| measured theta_x | CM47 talk | 14.28 ± 0.06 ± 0.42 |
| measured theta_y | CM47 talk | 14.35 ± 0.06 ± 0.5 |
170 MeV/c LiH dataset (March 2016)¶
| runs | Note 497 | 7764, 7766, 7767, 7694, 7777, 7782, 7783, 7785, 7786, 7787, 7799, 7800, 7806, 7822, 7823, 7824, 7825, 7826, 7827, 7831, 7832, 7833, 7861, 7863, 7864, 7865, 7866 |
| tof1 triggers | Note 497 | 1282488 |
| tof2 triggers | Note 497 | 174405 |
| tof1 triggers | CDB | 2517617 |
| tof2 triggers | CDB | 747564 |
| lmc1234 | CDB | 31583315 |
| time | CDB | 43 hrs 42 mins |
| measured theta_x | CM47 talk | 22.51 ± 0.24 ± 0.8 |
| measured theta_y | CM47 talk | 22.5 ± 0.24 ± 0.56 |
Comment:¶
- From approx two days of running at each setting (not including any downtime/etc), systematics errors are by far the dominant source of error.
- Why are the stats listed in MICE Note 497 different to those arising from my "cdb lookup" script?
- script is attached
- One could imagine taking less data; if stats errors go as sqrt(n) then 10 hours of data at each momentum would give stats error approx equal to or better than systematic error
- Say 4 momentum settings each of which gets 12 hours data + 30 % contingency => 60 hours of data (say 3 days of 24/7)
- Ryan notes LiH data set was a muon beam; so we should do much better
Updated by Rogers, Chris over 6 years ago · 18 revisions