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 =====