Pixel Standalone Test Beam: Status and Plans

1
Pixel Standalone Test Beam Status and Plans

• M. Cobal, University of Udine
• Pixel Week, TB meeting, CERN June 14th, 2004

• Plans for June 2004
• Status of the area
• Setup mounting

2
Standalone runs in 2004

• Goals for 2004 test something like 12
  non-irradiated
• and 7 irradiated production modules
• Need to clarify some not well understood
  measurements of
• last year.
• Need to have benchmark measurements to
  characterize
• the production modules.
• Require 4 weeks of beam (a commitment not much
  
• different from last year)

3

• Number of features observed in 2003 data showing
  a consistent disagreement with previous results.
• Not clear why the irradiated I2 turn out to be
  worst than I1
• Not clear why significant fraction of events
  arriving at early times
• Plus several problems spotted
• In some runs the trigger delay was not properly
  set..
• The beam spot shape made quite difficult to
  normalize from the H8 to the LHC situation.
• The trigger we used for the high intensity run
  was certainly not the best suited..
• This year data taking is extremely important as
  no further test beam are foreseen before LHC
  start-up

4
Apart clarifying the open issues, the production
modules to be tested in H8, should pass a number
of defined benchmark measurements, to be fully
characterized Tests of functionality
inefficient or noisy pixels, noise,
thresholds. Operative
tests efficiency, timewalk, resolution, test of
functionality to recover late hits,
depletion voltage measure of efficiency
after irradiation in realistic
conditions of ToT and incident angle.
5
SPS schedule
I period 26 June- 2 July II period 12-26
August III period 14-20 October
6
We moved already to NA45. The barrack has been
completely cleaned up. The DAQ PCs have been
already transported there. All the material who
was around in H8 has been brought there On 9th
June the rails (already in the zone) have been
fixed and the pixel table and box have been moved
as well. People from Marseille will take care of
the alignment Once installed, we can stay in
NA45 for all the period (until October). This
time all the space (3 rooms) is available for us.
Status of the area

7
Hardware needed (showed at the last PDSG)

• Concerning the hardware,  and assuming we want to
  have
• 4 modules under test plus the pixel telescope,
  here is what is needed - BAT telescope
• Pixel telescope (single chip boards, MCC mother
  board,
• trigger diode, 2 Dual Channel power supplies)
  -gtGenova
• - 1 regulator board (working for up to 6 modules)
  -gt Milano
• - Cables from regulator board to PP0 (1 per
  module)-gt Milano
• - 4 type0 small cables -gt Bonn
• - 5TPCC, 5TPLL corresponding cables -gt LBL
• - 4 Power supplies Dual Channel  (AGILENT) for
  the 4 modules - 1 power supply 5Vx10 A (for the
  TPCCs). - ISEG module for the high voltage -
  For the DCS I assume Wuppertal will provide all
  is needed,
• and Udine is going to furnish the
  heat-exchanger
• - Single board computer-gt Genova

8
Material available in H8 VME material
1 TDC 1 CORBO 1 VME spy 1 BAT
control box (probably old A2015) NIM material
1 coincidence (4 channels) 4
FAN-OUT (3 with 4x4 channels, 1 with 8 channels)
2 Double Time Units 3 Discrimanators (1 with 8
channels, 2 with 4 channels) 1 FAN-IN (with 16
channels in and 2 channels out) 1 SIMULATION
SYNCHRO (random trigger generator) 1 TTL Timing
Repeater

9
Material available in H8 (2nd) Others 3
Motor Drivers SI3450 1 Gossen power supply
Konstanter (2 channels 20V-1A, 1 channel 7V-5A)
2 Power supplies (2 channels 20V-1A, 1 channel
8V-5A) 1 Power supply (2 channels 20V-1A, 1
channel 7V-5A) with sense in the rear panel
Material available in the pixel lab NIM
material 2 Octal Discriminator 1 HV
Power Supply 1 Counter 1 Time Unit

Others 1 Keitley (HV Power supply GPIB)
1 Power Supply 1 ch. 30V/4A 1 Oscilloscope
10
Trigger

• People from Marseille will start the
  installation during the
• pixel week the trigger has to be completely
  rebuilt and they
• will provide a drawing of the whole scheme.
• We requested a high intensity run, which means
  108
• particles/spill. From 2003 data we learned
  that the intensity
• we can obtain is high enough not to focuss the
  beam up to
• 2mm size (intensity in the spot was by far
  higher than the
• one in the B-layer)
• We were running with the pixel telescope,
  triggering with the
• telescope diode and the 1st scintillator.
• - There were saturation problems with the
  scintillators
• The plan is to try to put the discriminator in
  the test beam
• area ( with or without additional amplifiers).

11
DAQ

• All DAQ and monitoring PCs have been reinstalled
• No particular problems, apart from formats in
  the DAQ (IS)
• database which have been changed (this requires
  a couple of
• day of work)

DCS

• Jojo and Tobias are coming to CERN for the pixel
  week and
• will prepare the DCS installation. Jojo is
  going to stay till
• June 23, while Tobias will be available till
  the end of the
• testbeam period

Pixel telescope

• Works will start during the pixel week

12
BAT telescope

• Bonn people arrived to CERN on the 9th of June.
• Four BAT-modules are installed, cabled, and
  powered
• (they chose four of five perfect modules, one
  is as spare in
• the control room).
• After installation, all four modules have been
  tested stand-
• alone with their PCI-based system and they all
  seem alive
• pedestal and noise are OK (apart from one
  strip on one
• module that needs to be masked), the
  electronics tests all
• work fine.
• Everything has been left powered, so ready for
  operation.
• Read-out and trigger cabling was connected and
  pulled into
• the control room.

13
Bat telescope

• The trigger cabling is as agreed with Paolo but
  obviously
• untested.
• The BAT-part of the VME system was still in
  place it has to
• be set up with a SBC and the general trigger
  logic. So the
• final testing with triggering and the creation
  of config/mask
• files on the SBC will be done by Markus starting
  next Tuesday.
• These means they won't need further access to the
  beam
• area (unless new problems are found when
  testing with the
• SBC), except for taking the lids off the BAT
  module sensor
• area. Those were left on to keep the modules
  protected
• during further installation work.

14
Cooling system
(Aldo Saavedra, Sven Vahsen, Tom Weber)
Every module is connected in parallel to the
cooling. Every inlet to the module has a valve
to adjust the flow for each individual
plate/module. The cooling liquid can go down to
-50C and there is a heat exchanger for the dry
nitrogen.

• Changes since last test beam
• Use Dynalene HC-50 coolant good to about
  -50C
• Coolant flows to the four pixel modules in
  parallel
• Valve for each module, so that flow rate can be
  individually adjusted
• New heat exchanger uses return flow of coolant
  to cool down dry air

15
Cooling system
A quick lab test has been done, where all four
cooling plates have been connected, and the
manifold's valves have been opened completely
for all four modules. The heat exchanger has
been connected to the return flow of the chiller,
and a chiller has been used that should have a
flow rate similar to the one at CERN. When the
module has been powered (IDD1.2A, IDDA1.0A),
the NTC temperature went up 3.3 degrees.
16
Coolant Flow
Manifold distributes coolant to each module
17
Cooling plate with module installed. Use
quick-connectors for coolant hoses to avoid
spills inside box when disconnecting hoses.
18
Air in
Coolant in
Coolant out
Air out
Heat Exchanger
19
Quick dirty test in the lab ?T (module
power_on power_off) 3C
20
Cooling system
The flow conditions in this little test should be
pretty realistic The important differences with
respect to the test beam will be the heat
exchange with the surroundings, and the viscosity
of the coolant at low temperatures. They are
going to bring a lot of insulation to deal with
the former, and the new coolant should help with
the latter. Tom is going to send everything
that's in the pictures, plus spare parts and a
lot of insulation via federal express on Monday.
So the package should arrive during next
week. The start of the installation is previewed
on Monday the 21st.
21
It is necessary to improve the on-line
monitoring and to speed up the offline one, to
have a prompt feed-back in case things are going
wrong. Indications from expert on how to improve
the online monitoring are expected from the
previous experiences some additional plots/
distributions which should be checked
immediately, can be identified. And shifters
could be given some "good" examples of how they
should look like.. An electronic logbook will
be available to be tested (see talk of
Magdalena). There will be strict rules for
shifters on how to fill the logbook (electronic
or paper one)!! The goal  is to arrive as close
as possible to some kind of "a regime" situation
Data and data quality control

22
Reminder rules settled in June 2003!!

• Modules which are supposed to go under test,
  should arrive here
• already mounted on the proper metallic support
• (Aldo should have sent a drawings to all the
  relevant parts).
• In this way, mounting or dismounting a module
  would be an easy
• operation of 2 minutes
• 2) Modules should be protected by their plastic
  cover not to be
• damaged during manipulation. They should just
  have the two needed
• connectors and not additional cables, scotch tape
  etc..
• 3) Modules should arrive already calibrated and
  the files should be
• made available in time.
• 4) People who want to test a module should try to
  have here a
• responsible for the module to work properly (or
  ask explicitely to
• somebody here)