LCUK Silicon Meeting

Wednesday 11 Feb 2015, 12:00 → 14:00 Europe/London

Virtual

Joel Goldstein (Bristol University), Joel Goldstein (University of Bristol (GB))

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Minutes of Virtual LCUK Silicon Meeting 11th February 2015

ATTENDEES: Joel (Bristol), Aidan (Glasgow), Joost, Peter and Tim (Liverpool), Fergus, Steve and Chris(RAL), Konstantin (OU), Armin, Phil, Wing, Georg and Glenn (Oxford), Yvonne (Manchester), Harald (Lancaster), Adrian (QMUL)

Note: I had bandwidth and phone problems for the first part of the meeting

News and Updates (Joel)

• The project has been funded at the "core" level, i.e. £75pa for travel with no specific support for silicon (or other) activities, consumables, staff effort etc. Small sums for consumables may be available as an exception
• The Japanese ILC decision is expected in 2017 after the MEXT committee report is delivered and considered by the cabinet.
• We have started discussing pixel tracking studies with SiD, although it is not clear how much effort will be needed to get the software fit for proper studies (or who can provide that effort). Everything so far has been done using analytical code to calculate the covariance matrix (which Joel now has running) and then smearing track parameters by hand.
• CLIC is starting a tracking working group
• Joel will set up a wiki at Bristol with external accounts for everyone else

Settting Positioning Requirements (Georg)

Georg's slides summarising the ATLAS and ATLAS upgrade experience are at  https://agenda.linearcollider.org/event/6656/contribution/1/material/slides/1.pdf

His conclusions are that the ATLAS tracker is essentially stable at the 1-2 micron level, apart from occasional "seismic" events (magnet quenches, cooling system interventions etc), and that the alignment can be done extremely well with tracks within these periods. Hardware alignment systems and even initial surveys have been of secondary importance. It is therefore essential to have alignment experts and mechanical engineers working together from the earliest design stages.

There was considerable discussion, including how much of this will change at the ILC: the number of tracks, required alignment precision, vibration environment due to pulsed power and relative alignment to other detector elements will all need careful consideration.

Next Meeting

There was a discussion on whether to continue holding virtual meetings every four weeks or so, whether or not this time slot should be used, or whether we should make an effort to meet in person. It was agreed to continue this offline.

Low Power Sensor Concepts (Konstantin)

Konstantin's slides are at https://agenda.linearcollider.org/event/6656/contribution/4/material/slides/0.pdf although as several people had to leave at 1:30 he only had time to reach slide 8. The presentation and discussion will resume next time.

 

 

12:00 → 12:10 News and Announcements

Speaker: Dr Joel Goldstein (Bristol University)

Slides LCUK_1402.pdf

12:10 → 12:40 Setting positioning requirements for the ATLAS upgrade

Speaker: Georg Viehhauser

Slides Mechanical_precision_and_stability.pdf Mechanical_precision_and_stability.pptx

12:40 → 13:00 Low Power Sensor Concepts

Speaker: Dr Konstantin Stefanov (The Open University)

Slides Konstantin_Low_Power_Sensor_Concepts_11_Feb_2014.pdf

13:00 → 13:05 Future Meeting Time

13:05 → 13:15 AOB