TestbeamOct18MeasurementsSummary < Main

Main Web>DetectorRD>FastTiming>TestbeamOct18MeasurementsSummary (2020-10-16, KevinHeijhoff)

LHCb testbeam October 2018 measurements overview

Device	Measurement	TLSCP bias [V]	DUT bias [V]	Threshold [e]	Angle [degrees]	Spills per step	Spills total	Runs	Comments
W0011_I05	Bias scan	200	2.5, 5, [10, 60, 10]	800	0	20	160	[31084, 31095]	No t0. See below.
3D	Angle scan	200	60	800	[0, 20, 2]	10	110	[31096, 31098], [31105, 31112]	No t0. See below.
	Timing uniformity of pixel matrix	200	60	800	0	20	120	31121, 31125, 31129, [31131, 31133]	No t0. See below. Measurements at all the corners.
	Long grazing angle run	200	60	800	85	189	189	31174	Long run over lunch
	Grazing angle scan	200	60	800	85, 86, 87.5, 97.7, 92.5	5	25	31175, [31178, 31180]
	Bias scan at grazing angle	200	5, 10, 15, [20, 60, 10]	800	88.3	20	160	[31182, 31185], 31189, [31191, 31193]	In run 31182, plane 5 has wrong number of phase groups.
	Bias scan	200	2.5, 5, [10, 60, 10]	800	0	20	160	[31194, 31197], 31200, [31202, 31205], 31207	DUT not centred, Telecscope planes have way too small cluster size in run 31207
	Bias and angle scan	200	20, 40, 65	800	[0, 45, 3]	4	64	[31601, 31605], [31607, 31625], [31627, 31651]
	Grazing angle scan at lower bias	200	40	800	86, 88, 88.3, 88.8, 89.1, 89.5, 90.3	5	35	[31664, 31671]
	Telescope bias scan	[25, 200, 25]	65	800	0	5	40	[31652, 31656], [31661, 31663]	Something wrong with W2F5 in run 31654
W0039_I11	Long run	200	90	700	0	135	135	31251	Long run over lunch.
Planar 50 µm	Bias scan	200	5, 10, 15, [20, 90, 10]	700	0	20	220	[31257, 31264], 31267, 31268, 31270, 31273, 31277, 31278
	Grazing angle scan	200	90	700	86, 88, 88.3, 88.8, 89.1, 89.5, 90.3	5	35	[31298, 31304]
	Bias scan at grazing angle	200	15, [30, 90, 30]	700	89.5	20	80	31305, 31306, 31309, 31310
	Bias and angle scan	200	15, [30, 90, 30]	700	[0, 80, 5]	5	255	[31311, 31315], [31317, 31330], [31332, 31345], [31347, 31362], [31364, 31382]
	Angle scan	100	25	700	[38, 52, 2]	10	80	31387, [31390, 31398]
	Threshold scan	200	90	[500, 1000, 100], [1200, 1600, 200]	0	20	180	[31400, 31407], 31409
	Threshold scan	100	25	[700, 1000, 100]	45	10	40	[31425, 31428]
	Threshold scan at grazing angle	200	90	[700, 1000, 100], [1200, 1600, 200]	89.5	10	70	[31431, 31437]
	Timing uniformity of pixel matrix	200	90	700	0	20	100	[31439, 31443]	Measurements at all the corners and the centre of the chip
	Timing uniformity of pixel matrix	200	90	700	0	5	?	31444	Measurements at all the corners and the centre of the chip in a single run
W0020_J07	Bias scan	200	[25, 300, 25]	700	0	1	12	[31482, 31493]	Ikrum = 10
Planar 200 µm	Bias scan	200	[25, 300, 25]	700	0	1	12	[31500, 31506], [31509, 31513]
	Grazing angle scan	200	300	700	86, 87.5, 88.4, 88.8, 91.2	5	25	[31514, 31518]
	Bias scan at grazing angle	200	[50, 300, 50]	700	88.8	10	60	31522, [31527, 31531]
	Bias and angle scan	200	[100, 300, 100]	700	[0, 80, 5]	5	255	[31532, 31540], [31542, 31556], [31558, 31568], [31570, 31585]

For clarity:
[31084, 31095] means 31084, 31085, 31086, ..., 31093, 31094, 31095
[20, 60, 10] means 20, 30, 40, 50, 60

See Elog for more details:
Runs 31062 -- 31214: https://webapps.nikhef.nl/elog/Silicon/17
Runs 31215 -- 31444: https://webapps.nikhef.nl/elog/Silicon/18
Runs 31447 -- 31585: https://webapps.nikhef.nl/elog/Silicon/21
Runs 31588 -- 31675: https://webapps.nikhef.nl/elog/Silicon/22

Software t0 problem

The first three measurements of W0011_I05 were without an external t0 signal and we put in a software t0 synchronisation to fix this. The software t0, however, does not reset the spidr time. As a result, a fraction of the pixel pakcets might have a spidr time that is off by 409.6 µs because the spidr tries to detect pixel packets that arrive too late, by comapring the pixel ToA and the spidr time, and then corrects the spidr time accordingly. It might be possible to salvage this data by using the telescope data.

TDC trigger configuration

The table below shows the three different trigger configurations that we had during the testbeam. The downstream scintillator determines the coincidene.

Trig. config.	Runs	DAQ 1	DAQ 2	DAQ 3	DAQ 4	DAQ 6
I*	84–133	RICH	-	Scintillator up-/downstream	Coincidence	Scintillator up-/downstream
II	174–207	RICH	Scintillator downstream	VELO	Coincidence	Scintillator upstream
III	257–671	Scintillator upstream	Scintillator downstream	VELO	Coincidence	RICH

*Runs without t0.

Device configuration

The table below shows which devices were connected to which DAQ machine

FMC	DAQ 1	DAQ 2	DAQ 3	DAQ 4	DAQ 6
0	W2J6	W2C5	W2G5	W2H7	Dummy W11D4/W2E5
1	W2B5	W2D5	W2F5	W2I3	DUT

Topic revision: r19 - 2020-10-16 - KevinHeijhoff

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