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Physics Shift Report

Start Date: 13th December
End Date: 16th December
Start Run: 08859
End Run:
Physics shifter: Francois Drielsma(13-14), Ao Liu(15-16)

Task

The task at end is to continue to take data for the emittance reduction measurement with LiH, task H11, for 240 MeV/c beams.

The cooling channel is in the setting 2016-04_2.4a

Task Momentum # Triggers Beamline Tag CoolingChannel Tag Similar runs Final Event Tally (k)
H11a 240 2e6 TOF1 2016-04-2.4a
H11b 240 2e6 TOF1 6-240+M3-Test1 2016-04-2.4a
H11b 240 2e6 TOF1 2016-04-2.4a

Task H12 - Magnet alignment

Task Momentum # Triggers Beamline Tag CoolingChannel Tag Similar runs Final Event Tally (k)
H12a 140 8e5 TOF1 2016-04-2.4a
H12b 170 8e5 TOF1 2016-04-2.4a
H12c 240 8e5 TOF1 2016-04-2.4a

Analysis

  • Tag is the beamline tag
  • Runs is a list of runs considered to make following calculations (I didn't use all runs for a particular tag)
  • TOF1 Triggers is the sum of the CDB TOF1 triggers scalar; note this is trigger requests (does not include dead time/etc)
  • TOF2 Triggers is the sum of the CDB TOF2 triggers scalar; note this is trigger requests (does not include coincidence with TOF1/etc)
  • lmc1234 sum is the sum of the CDB luminosity monitor scalar
  • time taken is the sum of the times listed (time between "start run" and "stop run")
  • number in muon peak is the number reporting tof01 in the muon peak, tuned by tag (roughly 28 to 32 ns)
  • number at tof2 is the number reporting at least one space point in tof1 and exactly one space point in tof2
  • number passing all cuts is the number passing:-
    • exactly one track in TKU
    • tof01 in the muon peak (tuned by tag)
    • TKU total momentum between 135 and 145 MeV/c
    • Exactly one space point in TOF0 and TOF1
  • number passing all cuts/p in tku:- I histogram p in TKU, then find the peak bin, then report number in the peak bin divide bin width
  • number passing all cuts/tof01:- as per previous entry, but this time using tof01 histogram

Analyses: Task H11 - Emittance Reduction!!

Observations made on setting H11b:
  • Well matched with the expected peak momentum ~238.5 MeV/c, the presence of Iris 4 has been taken care off.
  • A processing with momentum between [230-250] has been produced to study the emittance of the input beam.
  • The upstream emittance is measured upstream as being ~6.5 mm
Tag Runs lmc1234 sum TOF1 Triggers TOF2 Triggers time taken number in muon peak number at tof2 number passing all cuts number passing all cuts / p in tku [MeV/c^-1] number passing all cuts / tof01 [ns^-1]
6-240-diff8+M3-Test1_8873_8878 [8873, 8874, 8875, 8877, 8878] 2093453 2878659 1582708 6 hrs 19 mins 785505 830762 210698 13569.66 520690.0

Sample output

Task H11 - Emittance Reduction!!

===== 6 mm-240 =====

bz_z_240sol_2016-04_2_4a.png (20.2 KB) Drielsma, François, 12 December 2016 19:29

bz_z_240sol_2016-04_2_4a_small.png (34.6 KB) Drielsma, François, 12 December 2016 19:29

6-240-diff8_M3-Test1_8873_8878.tar.gz (3.5 MB) Drielsma, François, 13 December 2016 14:16

08873_08878.log Magnifier (19.5 KB) Drielsma, François, 13 December 2016 14:16

8873_8878_bunch_x_px.png (49.6 KB) Drielsma, François, 13 December 2016 14:16

8873_8878_bunch_y_py.png (49.3 KB) Drielsma, François, 13 December 2016 14:16