Performance of MRPC telescopes of the EEE Project

Performance of MRPC telescopes of the EEE Project E. Bossini, C. Cicalò, D. De Gruttola, I. Gnesi, M. Garbini, S. Grazzi, M. P. Panetta 10/05/2017 EEE meeting

Status ü time slewing correction applied ü st < 200 ps ü a few results to be reviewed (too high st) ü some big contribution outside the peak (most likely related to clock or reflections) ü many telescopes show an offset in the Dt distribution ü some examples in the next slides (data from Run 3) 10/05/2017 EEE meeting 2

ALTA-01 st = 214 ps 10/05/2017 EEE meeting st = 270 ps 3

BOLO-01 255 ps ps sstt =< 209 10/05/2017 EEE meeting sst <= 342 280 ps ps t 4

BARI-01 st = 263 ps 10/05/2017 EEE meeting st = 309 ps 5

TORI-01 st = 192 ps 10/05/2017 st = 247 ps EEE meeting 6

BOLO-03 st = 178 ps 10/05/2017 EEE meeting st = 231 ps 7

BOLO-03 (log y scale) whole Run 3 Nov 2016 no clock card here 10/05/2017 Dec 2016 no clock card here in part of this period EEE meeting Jan 2017 clock card ok but what is the other peak? trigger arriving at the next clock? reflections? 8

TORI-03 (log y scale) whole Run 3 clock card ok but what is the other peak? trigger arriving at the next clock? reflections? 10/05/2017 EEE meeting 9

Secondary peaks ü if they are due to reflections, in principle we could correct them ü for some analysis this could maybe be important (? ) Ref. Nuclear Instruments and Methods in Physics Research A 593 (2008) 263– 268 10/05/2017 EEE meeting 10

Status ü time slewing improves time res of about 20% ü different values to be understood ü offsets to be understood ALTA 01 offset ANCO 01 forse bad clock AREZ 01 ok BARI 01 ok BOLO 02 small offset BOLO 03 ok BOLO 04 small offset CAGL 01 small offset CAGL 02 forse bad clock CAGL 03 forse bad clock CATA 01 ok CATA 02 ok CATZ 01 ok CERN 01 small offset CERN 02 forse bad clock GROS 01 small offset 10/05/2017 GROS 02 forse bad clock LAQU 01 small offset LAQU 02 forse bad clock LECC 01 small offset LECC 02 small offset LODI 01 small offset LODI 02 small offset PATE 01 small offset PISA 01 offset REGG 01 forse bad clock SALE 02 forse bad clock SAVO 01 ok SAVO 02 SAVO 03 small offset TERA 01 small offset TORI 01 offset EEE meeting TORI 03 small offset TORI 04 ok TRAP 01 small offset TREV 01 ok TRIN 01 ok VIAR 01 offset VIAR 02 forse bad clock this table is not final (to be studied in different periods) 11

Trending plots ü data from Run 2 and Run 3 ü stability garanteed for a few telescopes in the same period ü possibility to chose different shorter periods in order to include other telescopes ü markers will be used instead of lines to avoid visualisation of drops in the trending 10/05/2017 EEE meeting 12

Trending plots 10/05/2017 EEE meeting 13

Trending plots 10/05/2017 EEE meeting 14

Trending plots 10/05/2017 EEE meeting 15

Trending plots 10/05/2017 EEE meeting 16

Trending plots 10/05/2017 EEE meeting 17

Trending plots 10/05/2017 EEE meeting 18

Trending plots 10/05/2017 EEE meeting 19

Trending plots 10/05/2017 EEE meeting 20

Trending plots 10/05/2017 EEE meeting 21

Trending plots 10/05/2017 EEE meeting 22

Beta distributions SAVO-02 TORI-03 10/05/2017 EEE meeting 23

Beta distributions TRAP-01 ü in general we need to fit the b and 1/b distributions with two gaussians 10/05/2017 EEE meeting 24

Efficiency and dark rate ü measurement performed on TORI-03 with 2 x 2 x 25 cm 3 scintillators as trigger system ü HV scan ü S/B estimation ü muon rate corrected by eff (m = Re) 10/05/2017 EEE meeting 25

Efficiency and dark rate 10/05/2017 EEE meeting 26

Efficiency and dark rate 10/05/2017 EEE meeting 27

Efficiency and dark rate 10/05/2017 EEE meeting 28

Conclusions ü data from Run 2 and Run 3 provide good data for the paper ü still room for improvements for time and spatial resolution ü efficiency plots shortly ready ü efficiency with external trigger (dark rate with HV scan) performed on TORI-03 ü currents and HV trendings to be done ü finalizing writing in the coming weeks 10/05/2017 EEE meeting 24