Physics Shift Report¶

Start Date: 8th December
End Date: 12th December
Start Run: 08776
End Run: 08858
Physics shifter: Ao Liu(8-10), Francois Drielsma(11-12)

Task¶

The task at end is to continue to take data for the emittance reduction measurement with LiH, task H9, for 200 MeV/c beams.

The cooling channel is in the setting 2016-04_1.7.

Task H9 - Emittance Reduction!!¶

Task	Momentum	# Triggers	Beamline Tag	CoolingChannel Tag	Similar runs	Final Event Tally (k)
H9a	200	1e6 TOF1	3-200+M3_Test1	2016-04-1.7	H4a H7a	1208
H9b	200	1e6 TOF1	6-200+M3-Test1	2016-04-1.7	H4b H7b	1000
H9c	200	2e6 TOF1	10-200+M3-Test1	2016-04-1.7	H4c H7c	3817
H9d	200	2e6 TOF1	DiffMask8-3-200+M3-Test1	2016-04-1.7

Task H10 - Magnet alignment¶

Task	Momentum	# Triggers	Beamline Tag	CoolingChannel Tag	Similar runs	Final Event Tally (k)
H10a	140	8e5 TOF1	DiffMask8-3-140+M3-Test2	2016-04-1.7
H10b	170	8e5 TOF1	DiffMask8-3-170+M3-Test1	2016-04-1.7
H10c	240	8e5 TOF1	DiffMask8-3-240+M3-Test1	2016-04-1.7		814

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 H9 - Emittance Reduction!!¶

Observations made on setting H9d:

• Far off in its mean momentum, peaked around 180MeV/c instead of 200. This is due to the presence of Iris 4 that accounts for ~16MeV/c of energy loss as specified in a previous physics shift report.
• The beam line has not been adjusted to take care of this feature.
• A processing with momentum between [175-185] has been produced to study the emittance of the input beam.
• The upstream emittance is measured upstream as being ~8.63 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]
3-200+M3-Test1	[8776, 8777]	1407497	840282	155063	3 hrs 31 mins	384280	75365	16281	2176.4	32630.0
6-200+M3-Test1_8796	[8796]	261540	243452	131667	0 hrs 50 mins	75265	72666	14091	1490.63	27635.0
10-200+M3-Test1_8817_8828	[8817, 8818, 8819, 8820, 8821, 8822, 8823, 8824, 8825, 8826, 8828]	3449480	4192571	1243509	11 hrs 29 mins	1169086	589709	105440	11794.93	241565.0
3-200-diff8+M3-Test1_8849_8858	[8849, 8850, 8851, 8852, 8853, 8854, 8855, 8856, 8857, 8858]	4989260	2996165	305359	14 hrs 34 mins	1430228	107980	3430	483.3	9225.0
3-200-diff8-newcut+M3-Test1_8849_8858	[8849, 8850, 8851, 8852, 8853, 8854, 8855, 8856, 8857, 8858]	4989260	2996165	305359	14 hrs 34 mins	1430228	107980	77397	8791.35	182925.0

Analyses: Task H10 - Magnet alignment¶

The momentum seem a bit low when you have the new beamline setting with one of the iris closed.
You may find the plots in the tarballs named by the beamline tags in the attachments.

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]
DiffMask8-3-240+M3-TSpecial Run	[8832, 8834, 8836, 8838]	879460	827975	138937	2 hrs 40 mins	235935	71610	33501	1521.15	61120.0
DiffMask8-3-170+M3-TSpecial Run	[8835]	690099	283825	92043	1 hrs 58 mins	106014	43682	65366	2769.75	86445.0
DiffMask8-3-140+M3-TSpecial Run	[8833, 8837]	1454987	439456	90277	4 hrs 0 mins	133946	20667	71351	3240.32	80810.0

Sample output¶

Task H9 - Emittance Reduction!!¶

===== 3 mm-200 =====

===== 6 mm-200 =====

===== 10 mm-200 =====

===== 3 mm-200-diff8-newcut =====