Transcript InlineTests

Collective effects for all
CW base versions.
Break in the Control line leads to
HV voltage jump up to 1400V( Vctrl=1.2).
In order to protect PMT- put 62k
resistor (Rpr) from the input of the
Control line to ground.
Rpr
In line tests with current and
modified CW bases.
- 40 bases of current ECAL version;
- 40 bases of HCALmc version;
- 20 bases of ECALmc version.
(thanks a lot to Tengiz for modification work!!!)
HVout reproducibility.
Conditions:
 One control box;
 Power cable / control cable:
 40 connectors;
 pitch as for ECAL Middle section;
 Length is 10m;
 Low voltage settings: +6V; -6V;
 Medium voltage settings: 60V or 80V;
 Control voltage settings:
 1.2V – equivalent to very Inner cells
current settings;
 1.9V – equivalent to peripheral Outer cells
current settings;
 By default: no patch with capacitance
on power line;
Current design : output HV
reproducibility
1)
2)
20 not-modified CW per line;
40 not-modified CW per line(first 20 are the same as in
1) );
CW Output HV, Vctrl = 1.2V,
MV=60V, 20 CW
CW Output HV, Vctrl = 1.2V,
MV=60V, 40 CW
CW Output HV, Vctrl = 1.2V, MV=60V, 20 CW,
patch 100 mkF
CW Output HV, Vctrl = 1.2V, MV=60V, 40 CW,
patch 100 mkF
Current design
CW Output HV, Vctrl = 1.9V:
Black: MV=60V, 40 CW per line
Red:
MV = 80V, 40 CW per line
Blue: MV=80V, Vctrl = 1.9V on the
measured CW, Vctrl is 0 for the rest
Current design
CW Output HV, MV=60V, 40 CW,
V ctrl 1.2V
Black: no patch
Red: patch 50 mkF
Blue: patch 100 mkF
Current design
HV shifts in individual bases due to a patch in MV line
10
0
1
3
5
7
9
11
13
15
17
19
-10
Volts
-20
-30
-40
base number
80
70
60
50
Volts 40
30
20
10
0
1
4
7
10 13 16 19 22 25 28 31 34 37 40
base number
-for the case of 20 bases in a line, patch added to MV line
for most bases decreases HVout, but in the case of 40 bases
in a line, it works in opposite direction;
- HVout shift values are different for different bases in a line.
Current design
Signal in OPamp input for ECAL (old version)
No patch in MV line
MV line with a patch
Up-p=1.0V
Up-p=0.8V
HVout=575V
HVout=545V
20 CW in a line
Up-p=0.8V
Up-p=1.0V
HVout=597V
HVout=628V
40 CW in a line
Horizontal scale for all pictures - 400μsec per unit !!!
Patch capacitance should work even in
‘opposite’ directions for different number of
CW in a line.
HCALmc & ECALmc versions
Signal in OPamp input for
HCALmc and ECALmc (modified versions)
HCALmc
ECALmc
40 CW in a line
Horizontal scale for all pictures - 10μsec per unit !!!
For both modified CW bases, jointed in a line,
no beatings or pile-up observed in OPamp input.
Signal shape and amplitude are the same as we
had for one base alone.
HCALmc-I : output HV
reproducibility
1)
2)
20 HCALmc CW per line or
40 HCALmc CW per line (first 20 are the same as in 1)
CW Output HV, Vctrl = 1.2V,
MV=60V, 20 CW
CW Output HV, Vctrl = 1.9V,
MV=60V, 20 CW
CW Output HV, Vctrl = 1.2V,
MV=60V, 40 CW
CW Output HV, Vctrl = 1.9V,
MV=60V, 40 CW
HCALmc-II
CW Output HV, Vctrl = 1.2V:
CW Output HV, Vctrl = 1.9V:
Black: MV=60V, 20 CW per line
Black: MV=60V, 20 CW per line
Red:
Red:
MV = 80V, 20 CW per line
MV = 80V, 20 CW per line
Green: MV=60V, 40 CW per line
Green: MV=60V, 40 CW per line
Blue:
Blue:
MV=80V, 40CW per line
MV=80V, 40CW per line
HCALmc-III
CW Output HV,
MV=60V, 20 CW
Black: Vctrl on all CW
is 1.2V
Green: Vctrl = 1.2V on
the measured CW, Vctrl
is 0 for the rest
Blue: Vctrl on all CW is
1.2V + patch 100 mkF
Red: Vctrl on all CW
is 1.2V, second
measurement (next day)
ECALmc-I: output HV
reproducibility


40 CW on the line: 20 ECALmc (Vctrl DAC 0..19) + 20
HCALmc CW on the line (Vctrl DAC 20..39) , since we
did not have 40 bases of ECALmc type;
Only bases of ECALmc type are studied;
CW Output HV, Vctrl = 1.2V,
MV=60V
CW Output HV, Vctrl = 1.9V,
MV=60V
ECALmc-II
20 ECALmc:
20 ECALmc:
CW Output HV, Vctrl = 1.2V;
CW Output HV, Vctrl = 1.9V;
Black, circles: MV=60V
Black,circles: MV=60V
Red, squares: MV=80V
Red, squares: MV=80V
For both modified versions:
- Stable
HVout for different
Vctrl, insensible to MV;
- No changes in HVout
observed for the cases of
base ‘alone’ and ‘in line’ tests.
HVout vs Vctrl
Conditions:
 One control box;
 40 C-W bases: 20 HcalMc (DAC
1..20) + 20 EcalMc (DAC 21..40)
 Power cable / control cable:
 40 connectors;
 pitch as for ECAL Middle section;
 Length is 10m;
 Low voltage settings: +6V; -6V;
 Medium voltage settings: 80V;
HCALmc: C-W output HV vs
Vctrl
Averaged over 20 bases
R.M.S. over 20 bases
Max value – Min value
(Max value – Min value) /
average
ECALmc: C-W output HV vs
Vctrl
Averaged over 20 bases
R.M.S. over 20 bases
Max value – Min value
(Max value – Min value) /
average
Electronic noise
Conditions:
 One control box;
 40 C-W bases: 20 HcalMc (DAC
1..20) + 20 EcalMc (DAC 21..40),
 8 HCALmc and 8 ECALmc bases
connected to a FEB.
 Power cable / control cable:
 40 connectors;
 pitch as for ECAL Middle section;
 Length is 10m;
 Low voltage settings: +6V; -6V;
 Medium voltage settings: 60V;
 Control voltage settings:1.9V.
HCALmc
HV=800V
ECALmc
HV=800V
Typical values:HV=0, rms=1.2;HV=800V, rms=1.3
Noise measurements with amplification factor 10
HV=0V
HV=0V
HV=800V
HV=800V
HV=0,
rms=2.99,
HV=800V,rms=4.39,
CW base noise =3.2
HV=0,
rms=3.48,
HV=800V,rms=5.23,
CW base noise=3.7
-CW base contribution to the total
readout channel noise is only
about 0.32(0.37) adc channels;
-For the case of Rs=10, this value
reduces to the level of 0.2 .
LED tests
Conditions:
 Led LV
 C-W, HcalMc design: 1000 counts
 PM control voltage:
 1.1….2 volts with step 0.1V
 Low voltage settings: +6V; -6V;
 Medium voltage settings: 60V;
 Measured values:
 C-W, HcalMc:
 time between trigger signal front on
LED and PM response at peak position
Signal collection time vs HV,
HCALmc & ECALmc design
HCALmc,Base #1
ECALmc
HAMAMATSU number: 17 ns at
1250V, which gives 19 ns / √HV
slope (if assume that there is no
constant term in the dependence
of time on HV)
HCALmc,Base #2
Dependence of output HV
on average anode current
HV(I=0)=499.4V
ECALmc,Vctrl=1.2V
HV(I0)=794.5V
ECALmc,Vctrl=1.9V
HV(I=0)=499.5V
HCALmc, Vctrl=1.2V
HV(I=0)=794.8V
HCALmc, Vctrl=1.9V