Testbeam Planning
1.
Common to all testbeams:
a.
Silicon detector construction and preparation:
Anne-Laure, Cinzia, Elias, Gennaro
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Planar detectors:
o
Neutron irradiation tests (old detectors) in Ljubljana
o
Delivery of new detectors expected end of May
o
Temperature studies
•
Planar/3D detectors:
o
Delivery expected in March
o
Irradiation tests in PS
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Pure 3D detectors:
o
Delay with etching machine
o
Delivery later in the year
b.
Electronics:
Angela, Walter, technician from Brunel, iranian post-doc ?
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VFAT development
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Board development
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Hardware of the later electronics chain (2 copies: X5, SPS)
(buy, partly develop)
c.
DAQ, trigger, online computing:
Emilio, Hubert, Mario, [need more manpower]
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Hardware needs
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Need 2 DAQs (X5, SPS) as identical as possible,
but specific items for SPS and X5
(SPS: BPM as trigger, 40 MHz synchronisation;
X5: silicon telescope ?)
•
Need to discuss strategy (together with electronics)
 arrange meeting between Emilio, Walter, Mario, …?
d.
Offline computing:
Valentina, Hubert, Mario
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Depends on b, c.
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Depends on test programmes for X5, SPS
2.
Specific to SPS Coasting Beam Tests:
a.
Test programme
Mario, ?
b.
Cables, infrastructure:
Anne-Laure, Daniela
•
Cables done
•
Patchpanel being done
•
Anything else before end of shutdown?
c.
Roman Pot mechanics:
Marco O.
d.
Cooling:
Friedrich
e.
Roman Pot controls:
Daniela, Mario, Marco O., Walter in cooperation with SPS main control
•
Veto electronics for RP movement
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RP control from counting room near cavern, contact with MCR
Coasting Beam Test Programme
Two shifts à 8 hours:
1. Understand the system
- Adjust DAQ timing w.r.t. 40 MHz clock signal
- Adjust trigger from Beam Position Monitors (BPM).
- Calibrate RP alignment using BPM and rate measurements.
2.
RF pickup, trigger capability, tracking studies
- Measure S/N ratio (detector prototypes with APV25 chip)
- Measure trigger purity (trigger on Si planes with VFAT and verify
with tracking planes)
- Measure trigger efficiency by monitoring one plane with the other 3.
- Try different trigger logics (3 out of 4, 4 out of 4, etc.)
- Record proton tracks detected by the planes with the APV25 chip
and reconstruct them offline.
- Try to Fourier-analyse hit time distribution and look for
components corresponding to the beam structure
Roman Pot Configuration
Beam Parameters
• 1 – 8 bunches (spaced by 23 ms – 2.9 ms)
• Emittance N ~ 1 mm rad
• up to 0.6 x 1011 protons per bunch
• Energy: 270 GeV (as high as possible)
3.
Specific to X5:
a.
GEMs:
F. Sauli, L. Ropelewski, Kari, possibly Genova technician
•
October period
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Independent DAQ?
b.
T1:
Genova group
•
Independent
c.
Silicon Tests:
First: Need test programme & strategy (next slide): everybody
Then:
•
Support mechanics: Marco O.
•
Cooling: Friedrich
•
Silicon telescope (if needed): Mario
Test Programme for X5:
I.
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II.
Aims
Prepare full-size detectors, electronics and DAQ for SPS tunnel
Need to identify  10 good detectors of each technology
(4 with VFAT, 6 with APV25)
Measure S/N
Measure efficiency, edge definition
Measure resolution
Want to vary temperature???
Setup Issues
•
Need support for 2 x 10 planes
(full 3D and planar/3D unlikely to arrive at the same time);
use pot parts of RPs?
•
Options for reference system:

Self-referencing plane arrangement

Use Silicon Telescope (implications on DAQ)
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Both
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Trigger scintillators:
Detector area: ~ 48 x 25 mm2
Have 50 x 50 mm2, 10 x 10 mm2 scintillators: adequate?
III.

Arrangement Options
Staggered
• cannot use pots for mounting
• measures only the edges of the upper planes
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Bilateral
With Telescope
Better resolution (< 10 mm)
Space in the centre with long baseplate ~ 55 cm (sufficient?)
Investigate DAQ issues (e.g. timing)