no cooling
beam on; xy table position x=327,5  y=65
HV=200V Istart_PY=8.2uA;  Istart_N=0.45uA
std. I2C settings

no cooling
beam on; xy table position x=333  y=80
HV=200V Istart_PY=8.2uA;  Istart_N=0.45uA
std. I2C settings

no cooling
beam on; xy table position x=322  y=80
HV=200V Istart_PY=8.2uA;  Istart_N=0.45uA
std. I2C settings, now with correct timing

wrong timing

no cooling
beam on; xy table position x=322  y=80
HV=200V Istart_PY=7.6uA;  Istart_N=0.42
std. I2C settings

falsches config file (single statt multi6)

no cooling
beam on; xy table position x=322  y=80
HV=200V Istart_PY=7.6uA;  Istart_N=0.42
std. I2C settings

Software run with 6 samples to ensure that APV chips dissipate full power.

DAQ data not saved, bias current monitored

new longterm files:
It-neg-0810110926.txt
It-pos-0810110926.txt

Origami6
HV=+-40V,
no cooling
beam on; xy table position x=306 y=74.5
Istart=57µA;
std. I2C settings

centered

currents:
8.10.2011  00:07:43  event=991  rate=0events/s temp/curr=33.0/-15.4 33.0/-17.3 33.0/-17.7 31.9/011.5 31.9/013.2 32.0/040.20
...

08.10.2011  06:32:34  event=179710  rate=0events/s temp/curr=33.1/-22.1 33.0/-25.6 33.1/-22.6 31.9/018.2 31.8/021.7 31.9/048.5
08.10.2011  06:33:28  event=180105  ***WARNING*** Error detected in APV 0, subevent 2. Event discarded, reset sent.
 

Permanent APV errors at several (all p-side, some n-side) APV chips after 180105 events, which could not be recovered by software resets. After restart of run, all APVs where alive again, hence hardware reset and I2C reconfiguration after 5 or 10 consecutive APV errors should be added to TUXDAQ software.

After APV errors occured, the cummulative bias current decrised from 78µA to 54µA. This effect can occures whenever the digital part of the APV is switched between idle and full operation. It seems that this is a thermal effect, caused by  the slightly higher power consumption of the digital part of the chips.

Origami6
HV=+-40V,
CO2 cooling: P_TT_4: 14.9 bar, mf=0.9 g/s
beam on; xy table position x=306 y=74.5

centered

I=17.8µA; old I2C settings; corrected trigger delay (htr); adjusted front-end voltages 

CO2 pressure reduced to 14.9 bar --> temp is about 4K colder
Temp. at pipe inlet (K7) = -18°C
Temp. at pipe outlet (K8) = -21.8°C

currents:

07.10.2011  23:26:21  event=89786  rate=0events/s temp/curr=33.0/-05.3 33.0/-05.8 33.0/-06.6 31.9/001.4 32.0/001.9 31.9/017.7
 

Origami6
HV=+-40V,
CO2 cooling: P_TT_4: 14.9 bar, mf=0.9 g/s
beam on; xy table position x=306 y=76.5

I=18.6µA; old I2C settings; corrected trigger delay (htr); adjusted front-end voltages 

CO2 pressure reduced to 14.9 bar --> temp is about 4K colder
Temp. at pipe inlet (K7) = -18°C
Temp. at pipe outlet (K8) = -21.8°C

used multi6 config instead of single hit config (cern11_origami_cooled2_multi6.cfg)

currents:
07.10.2011  18:36:07  event=1581  rate=31events/s temp/curr=33.9/-05.3 33.9/-05.6 33.9/-06.6 32.8/001.4 32.8/001.9 32.8/018.1

HV=+-40V,
CO2 cooling: P_TT_4: 18.2 bar, mf=1 g/s
beam on; xy table position x=321 y=99
I=18.6µA; old I2C settings; corrected trigger delay (htr); adjusted front-end voltage

The beam is directly focused onto APV chip #2 of n-side, so that it hits the area underneath chip and cooling pipe.
On p-side this location is attached to chip #4, which currently can not be read out, hence we only get data for the n-side.

currents:
07.10.2011  10:03:22  event=979  rate=0events/s temp/curr=33.2/-05.6 33.3/-06.0 33.2/-06.7 32.2/001.6 32.2/002.0 32.2/018.7
07.10.2011  17:17:18  event=184992  rate=0events/s temp/curr=33.8/-05.6 33.8/-06.0 33.8/-06.9 32.7/001.7 32.7/002.0 32.7/018.7
 

HV=+-40V,
CO2 cooling: P_TT_4: 18.2 bar, mf=1 g/s
beam on; xy table position x=352 y=89
I=19.1µA; old I2C settings; corrected trigger delay (htr); adjusted front-end voltages

beam focused on APV #3 of p- and n-side, respectively

currents:
07.10.2011  00:16:57  event=987  rate=0events/s temp/curr=34.3/-05.6 34.3/-06.0 34.3/-06.9 33.3/001.7 33.5/002.2 33.3/019.2
07.10.2011  09:13:42  event=249992  rate=0events/s temp/curr=33.6/-05.5 33.5/-06.0 33.6/-06.7 32.5/001.7 32.5/002.0 32.5/018.8
 

HV=+-40V,
CO2 cooling: P_TT_4: 18.2 bar, mf=1 g/s
beam on; xy table position x=260.8 y=60.25
I=19.4µA; old I2C settings; corrected trigger delay (htr); adjusted front-end voltages 

beam focused on APV #0 of p- and n-side, respectively

currents:
06.10.2011  17:07:41  event=639  rate=3events/s temp/curr=35.2/-05.6 35.2/-06.0 35.2/-06.9 34.5/001.7 34.5/002.2 34.5/019.6

HV=+-40V,
CO2 cooling: P_TT_4: 18.2 bar, mf=1 g/s
beam on; xy table position x=306 y=76.5
I=19.5µA; old I2C settings; corrected trigger delay (htr); adjusted front-end voltages

Temp. at pipe inlet (K7) = -14°C
Temp. at pipe outlet (K8) = -17°C

Before this run, the front-end voltages (+2.5 and +1.25) were readjusted so that the nominal values appear on MAMBO. (Previously, both were about 50mV too low.) Not sure if this makes a big difference, let's see.

currents:
06.10.2011  15:54:24  event=2901  rate=36events/s temp/curr=35.5/-05.6 35.5/-06.0 35.4/-06.9 34.9/001.9 35.0/002.2 35.0/019.6
06.10.2011  16:24:25  event=81350  rate=50events/s temp/curr=34.9/-05.6 34.9/-06.1 34.9/-06.9 34.3/001.7 34.3/002.2 34.3/019.6
 

HV=+-40V,
CO2 cooling: P_TT_4: 18.2 bar, mf=0.9 g/s
beam on; xy table position x=306 y=76.5
I=20.5µA; corrected trigger delay (htr)

New run with cold Origami and same I2C setting as used 2010, with longer shaping time for p-side

centered position in both x and y.

corresponding cal file: cal006

currents:
06.10.2011  09:20:29  event=988  rate=0events/s temp/curr=35.8/-05.5 36.0/-06.0 35.8/-06.7 33.5/001.7 33.6/002.0 33.6/019.3
 

HV=+-40V,
CO2 cooling: P_TT_4: 18.2 bar, mf=0.9 g/s
beam on; xy table position x=306 y=76.5
I=20.5µA; new I2C settings; corrected trigger delay (htr)

New run with cold Origami and new I2C settings (shorter peaking time) and hopefully correct timing - and centered position in both x and y.

corresponding cal file: cal007

currents:
06.10.2011  09:12:12  event=329714  rate=0events/s temp/curr=35.8/-05.5 36.0/-06.0 35.8/-06.9 33.6/001.7 33.5/002.2 33.6/019.3

HV=+-40V,
CO2 cooling: P_TT_4: 18.2 bar, mf=0.9 g/s
beam on
I=20.5µA; new I2C settings; corrected trigger delay (htr)

New run with cold Origami and new I2C settings (shorter peaking time) and hopefully correct timing.

corresponding cal file: cal007

Run stopped after 17845 events, because of bad trigger timing

Origami6
HV=+-40V
beam on

CO2 cooling: 
preassure @ P_TT_4 = 18.77 bar
mass flow = 0.9 g/s

I=20µA

longterm files (same files used for cal005 and run006):
It-pos-0510111531.txt 
It-neg-0510111531.txt  

currents and temperatures:
05.10.2011  19:30:51  event=17469  rate=0events/s temp/curr=35.6/-05.6 35.6/-06.1 35.6/-07.1 35.1/001.9 35.1/002.4 35.1/020.9
 

Changed trigger such that off-spill scintillator triggers are vetoed.

Inserted Flip-Flop which is set by begin of spill (WWE) and reset by end of spill signal (EE). Out-bar is put in coincidence with the scintillator trigger.

This also changes the timing, which was unfortunately not detected until 30 hours later. Thus, runs 4-7 have bad (wrong) timing -> UNUSABLE

I2C setting modified to improve the shape of the p-side signal --> shaping time reduced, pulse height still low

Origami6
HV=+-40V
beam on

CO2 cooling: 
preassure @ P_TT_4 = 18.2 bar
mass flow = 0.9 g/s

I=18.0µA

longterm files
It-pos-0510111531.txt 
It-neg-0510111531.txt  

currents and temperatures:
05.10.2011  17:53:00  event=2900  rate=47events/s temp/curr=35.3/-05.6 35.3/-06.0 35.3/-06.9 34.6/001.9 34.8/002.2 34.8/020.7