SiWLC ECAL Beam Test Readiness Meeting
166
LAL building 200
Summary Testbeam-Review
Attendees: K. Krueger, V. Boudry, G. Fayolle, F. Magniette, J. Nanni, A. Lobanov, A. Irles, R. Poechl
Introduction:
The team plans for a beam test at DESY between the 12/6/17 and the 23/6/17.
The main goal of the beam test is a second commissioning run of the existing 10 layer stack produced in the first half of 2016.
In general the detector gets in better and better shape thanks to the excellent communication between the different teams. At the moment we have 3.75 layers available on which cosmics are seen. The spill length has however to be limited to less or equal to 2.5 ms.
SLABs:
- On one layer four noisy ASICs are seen that serve all the same wafer. Therefore the noise is most likely to be attributed to the Si wafer (in the broad sense).
- One layer went back to LLR for repair work, instead one more layer came to LAL last Friday but has not been tested so far.
It follows that:
- Five layers are now at LAL of which 4 layers are working (including the one with the noisy layer) and one needs checkout but should be operational.
- Five layers are at LLR including the one that came from LAL are now at LLR. The four other ones are work in principle but need deeper validation. Jerome wants to define figures of merit and test then n, n+1, n+2 … layers to monitor the evolution. Maybe, the results of FindNoisy with well defined setup parameters (i.e. the ones used for cosmics above) are a good start?
- The monitoring tool of Adrian was considered to be very useful. It was agreed to add a few high level displays such as xy-hitmaps, total energy, longitudinal profile (hits and energy)
- Middle of may Adrian and Frederic will meet and work to fully integrate the monitoring tools of Adrian into calicoes for a real online tool and take advantage of online extraction tools of PYRAME.
The current tool (hitcam, R online monitoring) is still a safe backup solution applicable for the beam test. This is then also the moment when technical solutions on how the monitoring will be realised will be settled (nfs mount etc.).
Availability of people other than Adrian for DQ checks before the beam test may be a critical issue. Artur will be busy with CMS beam tests but will try to give a hand where possible.
test beam program:
The test beam programme will roughly look like this
0) Beam time mon 12/6/17 - sun 25/6/17
1) Transport 12/6/17
2) Setup 13/6/17 - 14/6/17
3) Commissioning 15/6/17 (earlier if possible)
4) Programme w/o tungsten starting on 16/6/17 morning (earlier if possible)
5) Programme w/ tungsten starting on Mon 19/6/17 morning (earlier if possible)
6) B-field measurements between 21/6/17 (afternoon) and 22/6/17 (until end)
Possibly independent from beam, with a second setup in the 2T magnet.
7) Packing and transport back Fri 23/6/17
Presence of engineers and “relevant” physicists almost assured.
Call for shifters will be issued soon.
No dosimeter needed but no more keyed access. The formation of at least 3 person to BT safety operation to get the interlock autorisation.
BT safety formation meeting normally on Monday 13:00. Can be requested for Tuesday.
Details are left to the Ecal team. Logistics will be organised between LLR and LAL and is not a dedicated topic of this summary.
B-filed measurement
- We have still to understand better how to realise the B-Field measurements. Note at this point also that a xy-table will be brought from France!!!
Preparation
- A visit to the site will be organised on the 15/5/17 and 16/5/17 (presence [at least] Guillaume and Roman)
- Need to setup an indico page to allow for registration for beam test. I think that one has to start here https://indico.desy.de/categoryDisplay.py?categId=310
- Instructions on training for beam test team and access cards DACS will be given on the Ecal beam test pages
- https://twiki.cern.ch/twiki/bin/view/CALICE/SiWDESY201706
and are not subject to this summary
- https://twiki.cern.ch/twiki/bin/view/CALICE/SiWDESY201706