EHN1Cosmics < FASER

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-- ClaireAntel - 2020-10-27

Cosmics data taking in EHN1 for FASER commissioning

Cosmics with technion plates

Summer 2020 Cosmics

Below you can find a description and summary of the cosmics runs taking over the 2020 summer period in EHN1 using two Technion scintillator plates and a full tracker station.

Physical setup

EHN1 physical setup:

Schematic:

Module mapping (NOTE: Layer 2 was flipped with respect to Layer 0 and 1):

Configurations

Some notes on configurations:

Trigger Logic Board (TLB) Look-up Table: Trigger on coincidence of signals from scintillator plates only.
TLB simple deadtime: 500 clock ticks
TLB tracker delay setting: 100 clock ticks
Chip read out mode: HIT mode [XXX]
Tracker thresholds:
- Used "TrimTarget": Optimised per-module threshold so that most strips trimmable.

Tracker configuration files

These can be found under /eos/project-f/faser-commissioning/summer2020CosmicsStand/configurations/Station0

Code repository

https://gitlab.cern.ch/faser/daq/-/tree/cosmics

Run list

All runs are located in /eos/project-f/faser-commissioning/summer2020CosmicsStand/

Folder	total events	configs	elog	scintillator pos.
16082020_HITmode	107004	Station0/Layer{N}	Tracker elog 133	over module 0 & 1 (4 & 5) for layer 0 & 1 (layer 2)
18082020_HITmode	81054	Station0/Layer{N}	EHN1 elog 86	over module 2 & 3 (6 & 7) for layer 0 & 1 (layer 2)
19082020_HITmode	44317	Station0/Layer{N}_newmasks	EHN1 elog 87	over module 2 & 3 (6 & 7) for layer 0 & 1 (layer 2)
24082020_HITmode	42198	Station0/Layer{N}_newmasks	Tracker elog 145	over module 0 & 1 (4 & 5) for layer 0 & 1 (layer 2)
27082020_HITmode_skewed	24509	Station0/Layer{N}_newmasks	Tracker elog 148	SKEWED [top] over module 4 & 5 (0 & 1) for layers 0 & 1 (layer 2), [bottom] over module ~1, 2 & 3 (~5, 6 & 7) for layers 0 & 1 (layer 2)
30082020_HITmode_skewed	48527	Station0/Layer{N}_newmasks		SKEWED [top] on center of planes covering modules 0, 4 & 1,5 [bottom] on center of plane covering modules 2,6 & 3, 7
31082020_HITmode_skewed	16603	Station0/Layer{N}_newmasks		SKEWED [top] on center of planes covering modules 0, 4 & 1,5 [bottom] on center of plane covering modules 2,6 & 3, 7
11092020_HITmode	20128	Station0/Layer{N}_newmasks		over module 4 & 5 (0 & 1) for layer 0 & 1 (layer 2)

(Note: Not all runs are listed in the table)

schematic of scintillator plate positions:

Results

Analysis and plotting scripts: https://gitlab.cern.ch/cantel/fasercosmicsanalysis/

Hit maps

Strip id correlations

Scintillator plates covering full module
- Strip id correlation of top and bottom chip pairs for Layer 0 mod 3 (19/08/2020 run):

Scintillator plates covering half a module
- Strip id correlation of top and bottom chip pairs for Layer 1 mod 1 (30/08/2020 run):

Noted Layer 2 inefficiency

Pre-selection: min 2 hits in reference layers (1 hit in top sensor, 1 hit in bottom sensor)	Event fraction with 2 hits in Layer 0	Event fraction with 2 hits in Layer 1	Event fraction with 2 hits in Layer 2
Run 16/08	93.5%	92%	85.5%
Run 19/08	93%	93%	85%
Run 11/09	92%	92%	88%

Presentations

FASER General Meeting FASER Collaboration Meeting #3

Winter 2020 Cosmics

Below you can find a description and summary of the cosmics runs taking over the 2020 winter period in EHN1 with a full tracker station. The two Technion scintillator plates were used for the first period of data taking, whilst later we switched to two FASER scintillators for maximum trigger coverage.