Tuning Investigations
Stave 4
T. Ince, J. Jentzsch, C. Lapoire, L. Marx
IFE-I4 Testing Meeting
July 8, 2013
Stave 4
cold tuning, 3000/2500/2000/1500e- tuning
‣ focusing on bad module C7-1
threshold
noise
Lynn Marx - University of Washington
2
July 3, 2013
1500e- tuning
when doing iterations on C7-1, threshold/noise/FDAC does not get better
‣ GDAC_FAST_RETUNE
‣ IF_TUNE
‣ GDAC_FAST_RETUNE
‣ TDAC_FAST_RETUNE
‣ IF_TUNE (12021)
Lynn Marx - University of Washington
3
July 3, 2013
1500e- tuning
when doing iterations on C7-1, threshold/noise/FDAC does not get better
‣ GDAC_FAST_RETUNE
‣ IF_TUNE
‣ GDAC_FAST_RETUNE
‣ TDAC_FAST_RETUNE
‣ IF_TUNE
‣ FDAC_TUNE (12027)
Lynn Marx - University of Washington
4
July 3, 2013
1500e- tuning
when doing iterations on C7-1, threshold/noise/FDAC does not get better
‣ GDAC_FAST_RETUNE
‣ IF_TUNE
‣ GDAC_FAST_RETUNE
‣ TDAC_FAST_RETUNE
‣ IF_TUNE
‣ FDAC_TUNE
‣ TDAC_FAST_RETUNE
‣ FDAC_TUNE (12031)
Lynn Marx - University of Washington
5
July 3, 2013
1500e- tuning
why can threshold change by so much if only doing IF_TUNE?
GDAC_FAST_RETUNE
IF_TUNE
Lynn Marx - University of Washington
6
July 3, 2013
TDAC vs FDAC
Comparing 3000e- and 2500e-: tdac / fdac distribution gets narrower / wider
‣ Why does this happen? Are they related (does threshold cause FDAC to get wider)?
tdac
3000e-
tdac
2500e-
fdac
3000e-
fdac
2500e-
why always
right-biased?
Lynn Marx - University of Washington
7
July 3, 2013
FDAC map
C7-1 is from batch 2
‣ why local dependencies?
http://dpnc.unige.ch/atlas/upgrade/IBL/StaveLoading/Production/Stave4/Stave4ModuleMap.pdf
Lynn Marx - University of Washington
8
July 3, 2013
BACKUP
Lynn Marx - University of Washington
9
July 3, 2013
Source scan
no topological correlation to FDAC map
‣ probably no disconnected bumps
Lynn Marx - University of Washington
10
July 3, 2013
1500e- tuning
when doing iterations on A4-1 (~bad), threshold/noise/FDAC does not get better
‣ GDAC_FAST_RETUNE
‣ IF_TUNE
‣ GDAC_FAST_RETUNE
‣ TDAC_FAST_RETUNE
‣ IF_TUNE (12021)
Lynn Marx - University of Washington
11
July 3, 2013
1500e- tuning
when doing iterations on A4-1 (~bad), threshold/noise/FDAC does not get better
‣ GDAC_FAST_RETUNE
‣ IF_TUNE
‣ GDAC_FAST_RETUNE
‣ TDAC_FAST_RETUNE
‣ IF_TUNE
‣ FDAC_TUNE (12027)
Lynn Marx - University of Washington
12
July 3, 2013
1500e- tuning
when doing iterations on A4-1 (~bad), threshold/noise/FDAC does not get better
‣ GDAC_FAST_RETUNE
‣ IF_TUNE
‣ GDAC_FAST_RETUNE
‣ TDAC_FAST_RETUNE
‣ IF_TUNE
‣ FDAC_TUNE
‣ TDAC_FAST_RETUNE
‣ FDAC_TUNE (12031)
Lynn Marx - University of Washington
13
July 3, 2013
1500e- tuning
when doing iterations on A1-1 (good), threshold/noise/FDAC does not get better
‣ GDAC_FAST_RETUNE
‣ IF_TUNE
‣ GDAC_FAST_RETUNE
‣ TDAC_FAST_RETUNE
‣ IF_TUNE (12021)
Lynn Marx - University of Washington
14
July 3, 2013
1500e- tuning
when doing iterations on A1-1 (good), threshold/noise/FDAC does not get better
‣ GDAC_FAST_RETUNE
‣ IF_TUNE
‣ GDAC_FAST_RETUNE
‣ TDAC_FAST_RETUNE
‣ IF_TUNE
‣ FDAC_TUNE (12027)
Lynn Marx - University of Washington
15
July 3, 2013
1500e- tuning
when doing iterations on A1-1 (good), threshold/noise/FDAC does not get better
‣ GDAC_FAST_RETUNE
‣ IF_TUNE
‣ GDAC_FAST_RETUNE
‣ TDAC_FAST_RETUNE
‣ IF_TUNE
‣ FDAC_TUNE
‣ TDAC_FAST_RETUNE
‣ FDAC_TUNE (12031)
Lynn Marx - University of Washington
16
July 3, 2013
Step size variations
Stave 04, cold tuning, 1500e- threshold
‣ focusing on bad module C7-1
FdacVbn
from 20 to 30
Lynn Marx - University of Washington
17
July 3, 2013