M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 1

Noise and correlation issues using LArNoiseMonToolBase

M. Lefebvre University of Victoria

Phase3 commissioning

analysis meeting 31 May 2006

Look at most pedestal runs with >1k events

UPDATED 2006/06/04

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 2

Recall run 1220 (2006/02/02)

BarrelC FT08R Front3 Channel 052 BarrelC FT01 Slot05 Channel 052

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 3

Recall run 1220 (2006/02/02)

BarrelC FT08R Front3 Channel 052 BarrelC FT01 Slot05 Channel 052

running sum R4channel sum R

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 4

Recall run 1220 (2006/02/02)

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 5

Example from run 1220 (2006/02/02)

large noise

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 6

Recall run 1220 (2006/02/02)

BarrelC FT08R Presampler

BarrelC FT08R Front1

BarrelC FT08R Front0

BarrelC FT08R Front2

running sum R running sum R

running sum R running sum R

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 7

Recall runs 1220, 1221, 1222 (2006/02/02)

HIGH

MEDIUM

LOW

BarrelC FT08R Front3 BarrelC FT01 Slot05

channel 52 region

slow growth of R

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 8

run 3506 (2006/05/11)

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 9

run 3506 (2006/05/11)

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 10

run 3506 (2006/05/11)

BarrelC FT17 Slot11

not visible in running sum Rvisible in 4channel window R

?

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 11

run 3660 (2006/05/19)

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 12

run 3660 (2006/05/19)

large noise, but gaussian

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 13

run 3660 (2006/05/19)

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 14

run 3660 (2006/05/19)

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 15

run 3660 (2006/05/19)

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 16

run 3660 (2006/05/19)

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 17

run 3660 (2006/05/19)

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 18

run 4685 (2006/05/22)

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 19

run 4685 (2006/05/22)

similar problem with run 3188 (LOW) FT19 and 20 slot04

LOW GAIN

R jumps when channel 107 is included in the running sum

R jumps when channel 107 is included in the sliding window of 4 channels

but no unusual noise on the corresponding channel

but no unusual corr coef for the corresponding channel! (note the colour scale)

M. Lefebvre, 31 May 2006 (updated 2006/06/04) Noise and correlation issues 20

run 3047 (2006/04/28)

BarrelC FT15L Front5 BarrelC FT20 Slot07

BarrelC FT15R Back1 BarrelC FT19 Slot10